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Product improvements

Products Upgrade :

16 SEPTEMBER 2014

First publication : 2014/09/03 Last publication : 2014/09/12

We are pleased to announce:

This product will supersede the current GLOBAL_ANALYSIS_BIO_001_008_a product. The former product is improved with :
- more variables (mole concentration of Silicate & Dissolved Iron),
- analysis done and provided until real time (previously it used to stop 2 weeks before real time)
- daily average fields for physical forcing fields (previously weekly average fields)
- biogeochemical system uses an ORCA025 with ¼ degree (previously ORCA1 with 1 degree).

  • The incorporation of Quality Indicator statistics from 16th September 2014 in the following Ocean Color products:

- OCEANCOLOUR_ATL_OPTICS_L3_NRT_OBSERVATIONS_009_034
- OCEANCOLOUR_ATL_CHL_L3_NRT_OBSERVATIONS_009_036
- OCEANCOLOUR_ARC_OPTICS_L3_NRT_OBSERVATIONS_009_046
- OCEANCOLOUR_ARC_CHL_L3_NRT_OBSERVATIONS_009_047

For each geophysical variable included in the products listed above (with the exception of ADG, ATOT, APH and OC488) an additional variable containing quality information data is provided in the netCDF files.

It is produced in a manner entirely analogous to that for the northern hemisphere sea ice drift dataset. Quality characteristics are the same.
The available series starts 6 March 2013.

Two new variables are added:
    - index of extremity
    - distribution percentiles
These offer more information on how to interpret the iceberg density variable, which is unchanged.
There will be no gap nor discontinuity in the data series for the main variable.

  • The upgrade of the SEA LEVEL TAC Reprocessed products from 16th September 2014.

    They have been extended up to May 1st 2014. And the new mission Saral/AltiKa data of the SEA LEVEL TAC Reprocessed products are now available on DGF dissemination and by using the VIEWING service (previously only MFTP dissemination was avaliable).

    The products concerned by this update are the following:

    SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_018
    *dataset-duacs-rep-global-j2-sla-l3-v4
    *dataset-duacs-rep-global-c2-sla-l3-v4    
    *dataset-duacs-rep-global-al-sla-l3-v4
    *dataset-duacs-rep-global-j2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-global-c2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-global-al-sla-unfiltered-l3-v4

    SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_020
    *dataset-duacs-rep-medsea-j2-sla-l3-v4
    *dataset-duacs-rep-medsea-c2-sla-l3-v4
    *dataset-duacs-rep-medsea-al-sla-l3-v4
    *dataset-duacs-rep-medsea-j2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-medsea-c2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-medsea-al-sla-unfiltered-l3-v4

    SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_023
    *dataset-duacs-rep-blacksea-j2-sla-l3-v4
    *dataset-duacs-rep-blacksea-c2-sla-l3-v4
    *dataset-duacs-rep-blacksea-al-sla-l3-v4
    *dataset-duacs-rep-blacksea-j2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-blacksea-c2-sla-unfiltered-l3-v4
    *dataset-duacs-rep-blacksea-al-sla-unfiltered-l3-v4

    SEALEVEL_GLO_NOISE_L4_REP_OBSERVATIONS_008_033
    *dataset-duacs-rep-global-al-noise-l4-v4
    *dataset-duacs-rep-global-al-noise-unfiltered-l4-v4

If you have any question, please contact MyOcean Service Desk.

 

Product Upgrade : BLACKSEA_ANALYSIS_FORECAST_BIO_007_003

First publication : 2014/07/23 --- Last update : 2014/07/30

Following the incident [MyOcean:1573] related to the unrealistic increase in nitrate concentration for product BLACKSEA_ANALYSIS_FORECAST_BIO_007_003, the 30th July 2014 the product quality data has been improved with data recalculated since 1 January 2013.  

If you have any question, please contact MyOcean Service Desk.

 

UPGRADE OF SEA LEVEL REPROCESSED PRODUCTS

First publication : 2014/07/17

We are pleased to inform you that SEA LEVEL TAC Reprocessed products have been extended up to December 31th 2013.

The missions Jason-2 and Cryosat-2 datasets are available both on MFTP and Direct Get File (DGF) dissemination.

A new mission Saral/AltiKa is added only via the MFTP dissemination and will be added on DGF dissemination in September.

Moreover the noise estimations for Saral/AltiKa datasets are also available in the product SEALEVEL_GLO_NOISE_L4_REP_OBSERVATIONS_008_033 via MFTP (and on DGF dissemination in September).

The products concerned by this update are the following:

SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_018
*dataset-duacs-rep-global-j2-sla-l3-v4
*dataset-duacs-rep-global-c2-sla-l3-v4      
*dataset-duacs-rep-global-al-sla-l3-v4
*dataset-duacs-rep-global-j2-sla-unfiltered-l3-v4
*dataset-duacs-rep-global-c2-sla-unfiltered-l3-v4
*dataset-duacs-rep-global-al-sla-unfiltered-l3-v4


SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_020
*dataset-duacs-rep-medsea-j2-sla-l3-v4
*dataset-duacs-rep-medsea-c2-sla-l3-v4
*dataset-duacs-rep-medsea-al-sla-l3-v4
*dataset-duacs-rep-medsea-j2-sla-unfiltered-l3-v4
*dataset-duacs-rep-medsea-c2-sla-unfiltered-l3-v4
*dataset-duacs-rep-medsea-j1g-sla-unfiltered-l3-v4


SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_023
*dataset-duacs-rep-blacksea-j2-sla-l3-v4
*dataset-duacs-rep-blacksea-c2-sla-l3-v4
*dataset-duacs-rep-blacksea-al-sla-l3-v4
*dataset-duacs-rep-blacksea-j2-sla-unfiltered-l3-v4
*dataset-duacs-rep-blacksea-c2-sla-unfiltered-l3-v4
*dataset-duacs-rep-blacksea-al-sla-unfiltered-l3-v4


SEALEVEL_GLO_NOISE_L4_REP_OBSERVATIONS_008_033
*dataset-duacs-rep-global-al-noise-l4-v4
*dataset-duacs-rep-global-al-noise-unfiltered-l4-v


Should you have any question, please leave a comment on the collaborative MyOcean Forum (Tutorials, IdeaBox).

 

MYOCEAN NEW SERVICE RELEASE

FROM 26 JUNE 2014

First publication : 2014/05/16 --- Last update : 2014/06/11

MyOcean is pleased to deliver a New Service Release from 26 June 2014.

Please note that it will include the release of the website design with a fresh new look , an easier navigation and a user-friendly ergonomy.

This release leads to improvements:

  • On products: in addition to the April update of the catalogue, new and updated reanalysis and reprocessing products have been added in the catalogue as well as the integration of HY2 data.
  • On service: advanced search functionnality, view functionnality available for all products, more products available with MyOcean FTP download mechanism, updated product documentation ...

Please find here :

We sincerely hope these new functionalities will meet your requirements. Should you have any question, please contact the MyOcean Service desk.

 

ARC AND GLO FORECAST PRODUCTS :

ASSIMILATION OF ALTIMETRIC DATA FROM HY2A SATELLITE FROM 26 JUNE 2014

 

 

The MyOcean ARCTIC and GLOBAL Forecasting Systems will assimilate altimetric data from Hy2a satellite frome 26/06/2014.

The assimilation of these Hy2a Sea Level observations is likely to improve the quality of the following products :

ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a
GLOBAL-ANALYSIS-FORECAST-PHYS-001-002

Please note that there will be no impact on the scripts.
 

Should you have any question, please contact the MyOcean Service desk.

 

MYOCEAN NEW SERVICE RELEASE

SINCE 15 APRIL 2014

First publication : 2014/02/21 --- Last update : 2014/03/21

MyOcean is pleased to deliver a New Service Release from 15 April 2014.

This release leads to improvements on products (new products, new datasets, quality improvements on existing products…), on service (updated product documentation, new web sections …).

Please find here :

We sincerely hope these new functionalities will meet your requirements. Should you have any question, please contact the MyOcean Service desk.

 

UPGRADE OF SEA LEVEL ALTIMETRY PRODUCTS


First publication : 2014/05/07 --- Last update : 2014/05/12

With the version 4.0, an important modification has been implemented in the Sea Level Altimetry products in order to take into account the variations of the oceans in the last years: the period of reference of the following products is now 20 years (from 1993 to 2012) against 7 years in version 3.1 (from 1993 to 1999):

  • SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_017   
  • SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_018   
  • SEALEVEL_MED_SLA_L3_NRT_OBSERVATIONS_008_019
  • SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_020
  • SEALEVEL_MED_SLA_ASSIM_L3_NRT_OBSERVATIONS_008_021
  • SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_022   
  • SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_023   
  • SEALEVEL_EUR_SLA_L3_NRT_OBSERVATIONS_008_024
  • SEALEVEL_ARC_SLA_L3_NRT_OBSERVATIONS_008_025

 Consequently, these data being used in the assimilation system, it will cause a gradual change of the quality of the products :

  • GLOBAL_ANALYSIS_FORECAST_PHYS_001_002
  • GLOBAL_ANALYSIS_PHYS_001_003
  • GLOBAL_ANALYSIS_BIO_001_008_a
  • GLOBAL_ANALYSIS_FORECAST_PHYS_001_015
  • IBI-ANALYSIS-FORECAST-PHYS-005-001-b
  • ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a
  • ARCTIC_ANALYSIS_FORECAST_BIO_002_004
  • BLACKSEA_ANALYSIS_FORECAST_PHYS_007_001

There will be no interruption in the delivery of products to users.

 

UPGRADE OF THE OSTIA SYSTEM

 

First publication : 2014/02/05

We are pleased to announce the upgrade of the following product:

  • SST-GLO-SST-L4-NRT-OBERSATIONS-010-001

The product has been updated on February 5th 2014. This will affect products dated 4th February onwards.

A correction to the calculation of the SST analysis error estimates which are provided with the SST product (i.e. the 'analysis_error' variable field in the NetCDF files) will be implemented.

This correction results in a reduction in the magnitude and a change in the spatial structure of the analysis error estimates.

Note: the SST and sea ice concentration fields remain unchanged.

Please note that this change is transparent to you.

 

MYOCEAN NEW SERVICE RELEASE

SINCE 14 NOVEMBER 2013

 

First publication : 2013/10/04 --- Last update : 2014/01/15

MyOcean is pleased to deliver a New Service Release since 14 November 2013.

This release leads to improvements on products (new products, new datasets, quality improvements on existing products…),
on service (updated product documentation …).

Please find here-enclosed:

o    A detailed Fichier pdf Notice about this new release

o    The list of Fichier pdf Products impacted by this release

We sincerely hope these new functionalities will meet your expectations.

Should you have any question, please contact the MyOcean Service desk.

 

UPGRADE OF SEA LEVEL REPROCESSED PRODUCTS

 

We are pleased to inform you that SEA LEVEL TAC Reprocessed products have been extended to August 7th 2013 for Jason-2 and Cryosat-2 datasets.


The products concerned by this update are the following:

SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_001_b
*dataset-duacs-rep-global-c2-sla-l3
*dataset-duacs-rep-global-j2-sla-l3
*dataset-duacs-rep-global-j2-sla-unfiltered-l3
*dataset-duacs-rep-global-c2-sla-unfiltered-l3


SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_002_b
*dataset-duacs-rep-medsea-c2-sla-l3
*dataset-duacs-rep-medsea-j2-sla-l3
*dataset-duacs-rep-medsea-c2-sla-unfiltered-l3
*dataset-duacs-rep-medsea-j2-sla-unfiltered-l3


SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_003_b
*dataset-duacs-rep-blacksea-c2-sla-l3
*dataset-duacs-rep-blacksea-j2-sla-l3
*dataset-duacs-rep-blacksea-c2-sla-unfiltered-l3
*dataset-duacs-rep-blacksea-j2-sla-unfiltered-l3

 

IMPROVEMENT ON THE PRODUCT ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a

 

The resolution of the atmospheric forcing fields used by the TOPAZ-model has been improved.

Forcing fields from ECMWF's HRES (High Resolution) Model is used, and the
new grid is 0.125 x 0.125 degrees, whereas the old grid size was 0.25 x 0.25 degrees.

That leads to minor improvements localized near the coasts are expected for the
product ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a.

 

UPGRADE OF SEA LEVEL REPROCESSED PRODUCTS

 

We are pleased to inform you that SEA LEVEL TAC Reprocessed products have been extended to
April 4th 2013 for Jason-2 and Cryodat-2 datasets and February 28th 2013 for Jason-1 geodetic orbit

The products concerned by this update are the following:

SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_001_b
*dataset-duacs-rep-global-c2-sla-l3
*dataset-duacs-rep-global-j1g-sla-l3
*dataset-duacs-rep-global-j2-sla-l3
*dataset-duacs-rep-global-j2-sla-unfiltered-l3
*dataset-duacs-rep-global-j1g-sla-unfiltered-l3
*dataset-duacs-rep-global-c2-sla-unfiltered-l3

SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_002_b
*dataset-duacs-rep-medsea-c2-sla-l3
*dataset-duacs-rep-medsea-j1g-sla-l3
*dataset-duacs-rep-medsea-j2-sla-l3
*dataset-duacs-rep-medsea-c2-sla-unfiltered-l3
*dataset-duacs-rep-medsea-j1g-sla-unfiltered-l3
*dataset-duacs-rep-medsea-j2-sla-unfiltered-l3

SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_003_b
*dataset-duacs-rep-blacksea-c2-sla-l3
*dataset-duacs-rep-blacksea-j1g-sla-l3
*dataset-duacs-rep-blacksea-j2-sla-l3
*dataset-duacs-rep-blacksea-c2-sla-unfiltered-l3
*dataset-duacs-rep-blacksea-j1g-sla-unfiltered-l3
*dataset-duacs-rep-blacksea-j2-sla-unfiltered-l3

 

UPGRADE OF BLACKSEA_ANALYSIS_FORECASTS :
ASSIMILATION OF SARAL/ALTIKA

 

We are pleased to announce the upgrade of the following products:

  • BLACKSEA_ANALYSIS_FORECAST_PHYS_007_001.
  • BLACKSEA_ANALYSIS_FORECAST_BIO_007_003

The products have been updated on August 21st 2013.

Assimilation of Altika altimetric data from SARAL satellite has been implemented. This update compensates the loss of Jason1 data since mid-June [MyOcean:1037].

The preliminary tests results show that no quality degradation is expected on the product following the use of SARAL/Altika SLA for data assimilation in the blacksea forecasting system. Moreover, a general quality improvement is expected.

Please note that this change is transparent to you.

 

 

UPGRADE OF DYNAMIC ATMOSPHERIC CORRECTION (DAC) IN THE NRT SLTAC PRODUCTS

 

We are pleased to announce you the implementation of an optimized Dynamic Atmospheric Correction (DAC) in the NRT SLTAC products.
 

What is the DAC ?

The Dynamic Atmospheric Correction is applied on the altimeter along-track signal to correct the high frequency variability signal aliased by the measurement. This correction is computed with the MOG2D model for high frequency component on which an inverse barometer low frequency component is added. Both components are based on atmospheric pressure fields given by ECMWF.

 

What’s new ?

From now, the DAC is computed taken into account the ECMWF forecasts: the near 2-days of atmospheric data in the future improve the time delay availability of the MOG2D component and make it possible to compute a DAC for the real-time data.

 

What are the improvements?

Using this optimized DAC improves the precision of the SLA in real-time (OGDR) and near-real time (IGDR). The Sea Level Anomalies variance at cross-over locations is significantly reduced mainly in the coastal and high latitudes areas.

 

Please, refer to the Quality Information Document 3.5.1 to have complete information.

 

 

UPGRADE OF ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a :
ASSIMILATION OF SARAL/ALTIKA

 

We are pleased to announce the upgrade of ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a product. The product will be updated on August 16th 2013.

Assimilation of Altika altimetric data from SARAL satellite has been implemented. This update compensates the loss of Jason1 data since mid-June [MyOcean:1037].

The preliminary tests results show that no quality degradation is expected on the product following the use of SARAL/Altika SLA for data assimilation in the arctic forecasting system. Moreover, a general quality improvement is expected.

Please note that this change is transparent to you.

 

 

UPGRADE OF GLOBAL_ANALYSIS_FORECAST_PHYS_001_002 :
ASSIMILATION OF SARAL/ALTIKA

 

We are pleased to announce the upgrade of GLOBAL_ANALYSIS_FORECAST_PHYS_001_002 product and the availability of its Quality Information Documentation (QUID). The product has been updated on August 8th 2013.

Assimilation of Altika altimetric data from SARAL satellite has been implemented in addition to assimilation of Jason-2 and Cryosat-2 data.
This update compensates the loss of Jason1 data since mid-June [MyOcean:1037].

The preliminary tests results show that no quality degradation is expected on the product following the use of SARAL/Altika SLA for data assimilation in the global forecasting system. A general quality improvment can be expected especially for high resolution systems.

Please, refer to the Fichier pdf Quality Information Document to have complete information.

 

 

UPGRADE OF SEA LEVEL AND OSI PRODUCTS

INSITU QUALITY DOCUMENTATION AVAILABLE

 

We are pleased to announce the improvements of SEALEVEL and OSI products, and the availability of INSITU Quality documentation.
You will find after the details of these improvements.
 

  • SEA LEVEL : Integration of Saral mission (AltiKa altimeter) in NRT- SLTAC products

Since July 1st 2013, the new version of the Sea Level products processing chain is implemented. It takes into account
in particular, the integration of Saral/AltiKa data. The new mission is integrated in the range of along-track Near Real time multi-mission products.
Thanks to a new collaboration between Cnes and Isro, the Saral satellite was launched on February 2013. The AltiKa on-board altimeter showing extremely good performances, Cnes/Isro decided to open the data access to all users for IGDRs and OGDRs products.
The constellation is thus reinforced in the Sea Level products leading to improve the quality of the data provided: more along-track sla data for model assimilation and better resilience of the system if an old altimeter becomes unavailable.

The new version of Sea Level production chain takes into account:
- The integration of Saral IGDRs/OGDRs in NRT process
- The integration of Cryosat-2 OGDRs in NRT process
- The improvement of the management of the SLA computation in case of non-repetitive mission
  (Cryosat-2, Jason-1 geodetic orbit) in NRT process

The changes impact the following datasets (new datasets for Saral/AltiKa data, improvement of data coverage
for Cryostat-2 and Jason-1 geodetic missions):

SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a
            dataset-duacs-nrt-global-al-sla-l3   [New]
            dataset-duacs-nrt-global-c2-sla-l3
            dataset-duacs-nrt-global-j1g-sla-l3
SEALEVEL_MED_SLA_L3_NRT_OBSERVATIONS_008_002_a
            dataset-duacs-nrt-medsea-al-sla-l3  [New]
            dataset-duacs-nrt-medsea-c2-sla-l3
            dataset-duacs-nrt-medsea-j1g-sla-l3
SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_003_a
            dataset-duacs-nrt-blacksea-al-sla-l3   [New]
            dataset-duacs-nrt-blacksea-c2-sla-l3
            dataset-duacs-nrt-blacksea-j1g-sla-l3
SEALEVEL_EUR_SLA_L3_NRT_OBSERVATIONS_008_004_a
            dataset-duacs-nrt-europe-al-sla-l3  [New]
            dataset-duacs-nrt-europe-c2-sla-l3
            dataset-duacs-nrt-europe-j1g-sla-l3
SEALEVEL_ARC_SLA_L3_NRT_OBSERVATIONS_008_005_a
            dataset-duacs-nrt-arctic-al-sla-l3   [New]
            dataset-duacs-nrt-arctic-c2-sla-l3
            dataset-duacs-nrt-arctic-j1g-sla-l3

Please, refer to the Product User Manual and Quality Information Document to have complete information.
 

  • OSI : Addition of a new dataset to the product SEAICE_ARC_SEAICE_L4_NRT_OBSERVATIONS_011_003
A second dataset is added to the sea ice product for the Greenland region: SEAICE_ARC_SEAICE_L4_NRT_OBSERVATIONS_011_003.
This dataset combines the same data as in the existing dataset into a biweekly overview.
The resulting fields cover most if not all the Greenland region.
 

  • IN SITU : Availability of Quality documentation

Quality Information Documents (QUID) are now available for INSITU products.
You will find them in each INSITU product information page, in the Documentation tab.

 

UPGRADE OF SEA LEVEL REPROCESSED PRODUCTS

 

We are pleased to inform you that SEA LEVEL Reprocessed products have been extended to December 26th, 2012.
The products and datasets concerned by this update are the following:

SEALEVEL_GLO_SLA_L3_REP_OBSERVATIONS_008_001_b
        *dataset-duacs-rep-global-c2-sla-l3
        *dataset-duacs-rep-global-j1g-sla-l3
        *dataset-duacs-rep-global-j2-sla-l3
        *dataset-duacs-rep-global-j2-sla-unfiltered-l3
        *dataset-duacs-rep-global-j1g-sla-unfiltered-l3
        *dataset-duacs-rep-global-c2-sla-unfiltered-l3

SEALEVEL_BS_SLA_L3_REP_OBSERVATIONS_008_003_b
        *dataset-duacs-rep-blacksea-c2-sla-l3
        *dataset-duacs-rep-blacksea-j1g-sla-l3
        *dataset-duacs-rep-blacksea-j2-sla-l3
        *dataset-duacs-rep-blacksea-c2-sla-unfiltered-l3
        *dataset-duacs-rep-blacksea-j1g-sla-unfiltered-l3
        *dataset-duacs-rep-blacksea-j2-sla-unfiltered-l3

SEALEVEL_MED_SLA_L3_REP_OBSERVATIONS_008_002_b
        *dataset-duacs-rep-medsea-c2-sla-l3
        *dataset-duacs-rep-medsea-j1g-sla-l3
        *dataset-duacs-rep-medsea-j2-sla-l3
        *dataset-duacs-rep-medsea-c2-sla-unfiltered-l3
        *dataset-duacs-rep-medsea-j1g-sla-unfiltered-l3
        *dataset-duacs-rep-medsea-j2-sla-unfiltered-l3

 

SST-GLO-SST-L4-NRT-OBSERVATIONS-010-001 UPDATE

 

Please be aware that minor updates to the operational MyOcean 'Global Ocean OSTIA Sea Surface Temperature and Sea Ice Analysis'
product (SST-GLO-SST-L4-NRT-OBSERVATIONS-010-001) will be implemented on Weds 1st May 2013.
These changes will therefore affect SST analyses dated 30 April 2013 onwards.
   
The changes will have no effect on the global open-ocean SST values and will only affect inland seas and lakes where we have
included lake ice in the OSTIA ice field.

Further details of the lake ice changes can be found in the Product User Manual (PUM)

 

NEW SERVICE RELEASE FROM 23 APRIL 2013

 

MyOcean is pleased to deliver a New Service Release from 23 April 2013.

This release leads to improvements on products (new products, quality improvements on existing products, better organization of the catalogue…), on service (new download mechanism, improvement on the product visualization…).

Please find here :

o    A detailed Fichier pdf notice about this new release

o    The list of Fichier pdf products impacted by this release

We sincerely hope these new functionalities will meet your requirements. Should you have any question, please contact the MyOcean Service desk.

 

UPGRADE OF SEA LEVEL REPROCESSED PRODUCTS

 

We are pleased to inform you that as of Friday April, 5th at least, SEA LEVEL Reprocessed products will be extended to November 21st, 2012. The products (and datasets) concerned by this update are the following:

SEALEVEL_GLO_SLA_L3_RAN_OBSERVATIONS_008_001_b
*dataset-duacs-ran-global-c2-sla-l3
*dataset-duacs-ran-global-j1g-sla-l3
*dataset-duacs-ran-global-j2-sla-l3
*dataset-duacs-ran-global-j2-sla-unfiltered-l3
*dataset-duacs-ran-global-j1g-sla-unfiltered-l3
*dataset-duacs-ran-global-c2-sla-unfiltered-l3

SEALEVEL_BS_SLA_L3_RAN_OBSERVATIONS_008_003_b
*dataset-duacs-ran-blacksea-c2-sla-l3
*dataset-duacs-ran-blacksea-j1g-sla-l3
*dataset-duacs-ran-blacksea-j2-sla-l3
*dataset-duacs-ran-blacksea-c2-sla-unfiltered-l3
*dataset-duacs-ran-blacksea-j1g-sla-unfiltered-l3
*dataset-duacs-ran-blacksea-j2-sla-unfiltered-l3

SEALEVEL_MED_SLA_L3_RAN_OBSERVATIONS_008_002_b
*dataset-duacs-ran-medsea-c2-sla-l3
*dataset-duacs-ran-medsea-j1g-sla-l3
*dataset-duacs-ran-medsea-j2-sla-l3
*dataset-duacs-ran-medsea-c2-sla-unfiltered-l3
*dataset-duacs-ran-medsea-j1g-sla-unfiltered-l3
*dataset-duacs-ran-medsea-j2-sla-unfiltered-l3

 

QUALITY CONTROL OF THE PRODUCT INSITU_GLO_NRT_OBSERVATIONS_013_030

 

Up to now, a lot of data without valid quality control have been excluded from the product INSITU_GLO_NRT_OBSERVATIONS_013_030.
From 11/03/2013, all data will be delivered, whatever the quality control.
Consequently, you will have to use the Quality Check flag associated to each measure to ensure that it is compatible with the usage.
Only the data flagged with 1,2,5 and 8 should be used.

Quality Check flag meanings are :
 O:no_qc_performed
 1:good_data
 2:probably_good_data
 3:bad_data_that_are_potentially_correctable
 4:bad_data
 5:value_changed
 6:not_used
 7:nominal_value
 8:interpolated_value missing_value

Already existing data will be regenerated progressively from 11/03/2013.

 

 

UPGRADE OF SEALEVEL PRODUCTS


Please, be informed that, as from February, 19, 2013, the delivery of the Sea Level products will be improved and the following changes will be implemented:

  • The Global NRT products will be updated several times per day in order to include the most recent available OGDR data (called “OGDR on the fly”). For example, if you download files at 15:00 for the day D:

o At the present time, the last date of data that you can get in the last file delivered is ~20:00 of the day D-1.

o As from February 19, the same file will be updated and you will get data until 13:00 of the day D at the best (if OGDR is valid).

All datasets of the following product are concerned:

SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a

  • All the Sea Level SLA products will be compressed (no double dissemination). When you download files through the MyOcean Web Portal Directgetfile Service:

oAt the present time, you get a zip file containing *.nc files

oAs from February 19, you will get a zip file containing *.nc.gz files

All datasets of the following products are concerned:

                 SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a
                 SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_003_a
                 SEALEVEL_MED_SLA_L3_NRT_OBSERVATIONS_008_002_a
                 SEALEVEL_EUR_SLA_L3_NRT_OBSERVATIONS_008_004_a
                 SEALEVEL_ARC_SLA_L3_NRT_OBSERVATIONS_008_005_a
                 SEALEVEL_GLO_SLA_L3_RAN_OBSERVATIONS_008_001_b
                 SEALEVEL_MED_SLA_L3_RAN_OBSERVATIONS_008_002_b
                 SEALEVEL_BS_SLA_L3_RAN_OBSERVATIONS_008_003_b
                 SEALEVEL_GLO_MDT_L4_REF_OBSERVATIONS_008_013
                 SEALEVEL_GLO_MSS_L4_REF_OBSERVATIONS_008_015
                 SEALEVEL_MED_MDT_L4_REF_OBSERVATIONS_008_014

For more details regarding the changes, see the SLTAC updated Fichier pdf Product User Manual .

 

TEMPORAL EXTENSION OF SEALEVEL

REPROCESSED PRODUCTS


Please, be informed that, as from Friday 18th of January, SEALEVEL TAC Reprocessed products
will be extended to July 18th, 2012 (instead of April 18th 2012).

Several changes are taken into account:

  • Jason-1 is on its geodetic orbit since May 2012:

o    j1n datasets are not updated anymore, the last date available is March 7, 2012.

o    there are new datasets named j1g for Jason-1 on its geodetic orbit starting on June 12, 2012.

 

 

UPGRADE OF SEALEVEL, OSTIA SST AND BLACK SEA PRODUCTS

 

We are pleased to announce the improvements of SEALEVEL, OSTIA SST and BLACKSEA products.

  • BLACKSEA products

As from December 3th, 2012, products obtained by hydrodynamic and biochemical models will be updated to compensate for the loss of Envisat and Jason-1.

The data will be updated from the 1st April 2012 to the present.

The concerned products are:

BLACKSEA-ANALYSIS-FORECAST-PHYS-007-001-a
BLACKSEA-ANALYSIS-FORECAST-PHYS-007-001-b
BLACKSEA-ANALYSIS-FORECAST-BIO-007-003

  • SEALEVEL products

As from December 4th, 2012, the processing of Near Real Time  Cryosat-2 SEA LEVEL products will be improved with:

•    a better tuning of altimeter parameter and correction (backscatter coefficient and thus the Sea State Bias correction)  improving the SLA stability,

•    a new editing process allowing to improve the SLA quality notably in sea ice areas.

You can find information in Labroue S., A. Ollivier, M. Guibbaud, F. Boy, N. Picot, P. Féménias,“Quality assessment of Cryosat-2 altimetric system over ocean”, OSTST 2012 in Venice.

The impacted products are:

SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a *dataset-duacs-nrt-global-c2-sla-l3
SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_003_a *dataset-duacs-nrt-blacksea-c2-sla-l3
SEALEVEL_MED_SLA_L3_NRT_OBSERVATIONS_008_002_a *dataset-duacs-nrt-medsea-c2-sla-l3
SEALEVEL_ARC_SLA_L3_NRT_OBSERVATIONS_008_002_a *dataset-duacs-nrt-arctic-c2-sla-l3
SEALEVEL_EUR_SLA_L3_NRT_OBSERVATIONS_008_002_a *dataset-duacs-nrt-europe-c2-sla-l3

 

  • OSTIA SST product

We have been working on some updates to the MyOcean Global Ocean OSTIA Sea Surface Temperature and Sea Ice Analysis product which will become operational on or after the January 17th, 2013.

These changes will lead to global and regional accuracy improvements in the product. The ability of the SST analysis to resolve small scale ocean features will also be improved.

The main changes responsible for the improvements are:

•    An update to the background error covariance estimates within the OSTIA system.

•    The use of a subset of MetOp AVHRR data together with the in-situ data as a reference in the bias correction of satellite data used in the SST analysis.

Product format will remain unchanged with the same file sizes, grid specification and metadata.

 The affected products are:

SST-GLO-SST-L4-NRT-OBSERVATIONS-010-001-a
SST-GLO-SSTA-L4-NRT-OBSERVATIONS-010-001-b
SST-GLO-SSTA-L4-NRT-OBSERVATIONS-010-001-c

 

UPGRADE OF MYOCEAN CATALOGUE FROM 12th NOVEMBER 2012

AND TRANSITION PERIOD

 

We are pleased to announce that new release of MyOcean Catalogue is now available.

This release leads to few products improvements and concerns following product groups:

  • Arctic Ocean
  • Baltic Sea
  • Mediterranean Sea
  • Ocean Colour
  • Sea Surface Temperature
  • Sea ice
  • In Situ

The release will take place on Monday 12th November 2012.

Please take a look at the “ Fichier xls Transition document ”:

  • It details the changes per product
  • It details how to update your downloading scripts (when the product has been changed by the release)


Both product versions (“old” and “new” release) will be available for a transition period by around 3 weeks after the release.
The precise transition period per product is given in the “transition document”.
For users using scripts, we therefore strongly recommend to update the scripts during the transition period, before the old version is switched off.

Would you experience any problems, please contact the MyOcean Service Desk.

 

TEMPORAL EXTENSION OF SEALEVEL TAC

REPROCESSED PRODUCTS


We are pleased to inform you as of Friday 28th of September, SEALEVEL TAC Reprocessed products

will be extended to April 18th, 2012 (instead of February 8th 2012).

Note that the mission Cryosat-2 is added.

 

SEA-LEVEL TAC - UPDATEOF THE PRODUCTION CHAIN TO TAKE INTO ACCOUNT THE CHANGE OF THE STANDARD J2 GDR-C TO GDR-D

 

We are pleased to inform you that the SEALEVEL-TAC NearRealTime Jason-2 products
take into account since the 2nd of August the altimetric standards IGDR/OGDR version “D” ( instead of version “C”).

The SLTAC products concerned are the SLA NRT which the production date (the third one in the filename) is older than  2012/08/01:
SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a
SEALEVEL_MED_SLA_L3_NRT_OBSERVATION_008_002_a
SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_003_a
SEALEVEL_EUR_SLA_L3_OBSERVATIONS_008_004_a
SEALEVEL_ARC_SLA_L3_OBSERVATIONS_008_005_a

The nomenclature of files is unchanged.

SLTAC ensures a transition as seamless as possible between the standards in order to minimize the impact of this change.
For more details regarding the changes, see the SLTAC updated Product User Manual:  Fichier pdf MyO315_pum-008-001-005 .  

Please note that this Product User Manual is a newer version than the one in the catalogue online.

The PUM in the catalogue online will be updated later in the fall.

 

ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a

IMPLEMENTATION OF JASON-1 GEODETIC TRACK SEA LEVEL ANOMALY DATA

 

Jason-1 geodetic track sea level anomaly data for assimilation is implemented in addition to the existing Jason-2 and Cryosat2 data sources into the Arctic forecast system since the 2012-06-28 analysis.



The implementation of this new data will most likely give a denser and more accurate sea level data field, which is expected to improve the product

ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a

.

 

TEMPORAL EXTENSION OF SEALEVEL TAC REPROCESSED PRODUCTS

 

We are pleased to inform you as of Monday 25th of June at last, SEALEVEL TAC Reprocessed products will be extended  to February 8th, 2012 (instead of December  7th, 2011).

The concerned products (and datasets) are listed in the Pdf joined file : pdf file MyO263_SL_TAC_Extension.pdf

 

UPGRADE OF PRODUCTS:

ARTIC_ANALYSIS_FORECAST_PHYS_002_001_a

ARTIC_ANALYSIS_FORECAST_BIO_002_004

 

The following products have been upgraded:
ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a
ARCTIC_ANALYSIS_FORECAST_BIO_002_004

The only visible change is that the daily forecast updates now extend to +9 days ahead every day.
This is in contrast to the previous routine where the same weekly 10-day forecast was updated daily.
The assimilation schedule is still weekly.

At the same time, the weekly assimilation schedule has been revised in order to access more recent
observations than previously.
The analysis is now run on Thursdays (in contrast to Tuesdays previously) and the analysis time is 3 days
prior to Thursday (in contrast to 7 days previously).

Note that this change is transparent to you, but is expected to significantly improve the quality of the forecasts.

 

 

UPDATE OF SEALEVEL REANALYSIS PRODUCTS

 

From Tuesday 29th of May, the following re-processed products have been extended to December 7th, 2011 (instead of September 28th, 2011):

SEALEVEL_GLO_SLA_L3_RAN_OBSERVATIONS_008_001_b
SEALEVEL_MED_SLA_L3_RAN_OBSERVATIONS_008_002_b
SEALEVEL_BS_SLA_L3_RAN_OBSERVATIONS_008_003_b

 

JASON-1 RE-INTEGRATION IN THE SEALEVEL TAC NRT SYSTEM SINCE MAY 25 TH 

 

Jason-1 has been re-integrated in the SEALEVEL TAC NRT system since May 25th.
Indeed, Jason-1 is now on its geodetic orbit.

Therefore, these events lead to:
-    A dissemination of Jason-1 SL-TAC data for its geodetic orbit with a change in the nomenclature of the datasets and files: "j1g".
-    For the Jason-1 geodetic orbit, no mean profile can be used. The Mean Sea Surface (MSS_CNES_CLS11) is used instead.
-    Jason-1 along-track files for its repeat orbit are available until March 3rd, 2012.

The following products take into account the new Jason-1 orbit :
SEALEVEL_GLO_SLA_L3_NRT_OBSERVATIONS_008_001_a (dataset-duacs-nrt-global-j1g-sla-l3)
SEALEVEL_MED_SLA_L3_NRT_OBSERVATION_008_002_a (dataset-duacs-nrt-medsea- j1g-sla-l3)
SEALEVEL_BS_SLA_L3_NRT_OBSERVATIONS_008_003_a (dataset-duacs-nrt-blacksea- j1g-sla-l3)
SEALEVEL_EUR_SLA_L3_OBSERVATIONS_008_004 (dataset-duacs-nrt-europe- j1g-sla-l3)
SEALEVEL_ARC_SLA_L3_OBSERVATIONS_008_005 (dataset-duacs-nrt-arctic- j1g-sla-l3)

 

 

QUALITY UPGRADE FOR PRODUCTS
GLOBAL_ANALYSIS_FORECAST_PHYS_001_001_c
GLOBAL_FORECAST_PHYS_001_001_d

 

The quality of the following products has been improved on May 8th 2012:

GLOBAL_ANALYSIS_FORECAST_PHYS_001_001_c
GLOBAL_FORECAST_PHYS_001_001_d

Cryosat-2 track sea level anomaly data assimilation has been implemented in addition to assimilation of Jason-1, Jason-2 and Envisat data. This improvement compensates the current loss of Envisat and Jason-1 data.

 

 

QUALITY UPGRADE FOR PRODUCT
INSITU-GLO-TS-RAN-OBSERVATIONS-013-001-b

 

Some improvements to the MyOcean In Situ system have become operational on May 3 2012.
CORA3, a comprehensive and qualified Ocean In Situ dataset of temperature and salinity profiles from 1990 to 2010, has been taken into account for the Global Ocean In-situ observation product (yearly delivered in delayed mode).
Data is available up to 2010 (instead of up to 2007 previously).
File format remains unchanged.

 

QUALITY UPGRADE FOR PRODUCTS
NORTHWESTSHELF-ANALYSIS-FORECAST-PHYS-004-001-b
NORTHWESTSHELF-ANALYSIS-FORECAST-BIO-004-002-b

 

Some improvements to the MyOcean North West Shelf system have become operational on March 28 2012.
These changes lead to quality improvements in the model’s tidal harmonics as well as the chlorophyll, nutrients, attenuation and surface temperature (SST) fields.

Users should be aware that the model bathymetry has also been updated as part of this change which was necessary to improve slope currents and tidal harmonics. This bathymetry change mean that the product mask have a small number of changes at depth with some near-bed points changing from sea to land points and vice-versa. Products otherwise remain unchanged with the same file sizes, grid specification and metadata.

  

QUALITY UPGRADE FOR PRODUCT
ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a

 

Some improvements to the MyOcean Arctic system have become operational on March 6 2012. 
Implementation of Cryosat-2 track sea level anomaly data for assimilation in addition to the existing Jason-1, Jason-2 and Envisat data sources into the ARC-MFC system, that is, product  ARCTIC_ANALYSIS_FORECAST_PHYS_002_001_a has been performed on March 6 2012. Adding these data to the existing assimilation data sources will most likely give a denser and more accurate data field.

 

 CAL/VAL ACCURACY NUMBERS

 

The quality assessment is an important activity in MyOcean Production Centres.

In each MyOcean Production Centre, the scientific assessment (performed successively on the V1 and V2 MyOcean systems before operations) as well as the real time scientific routine monitoring, allowed the scientific teams to better evaluate the quality and the accuracy of the products.

Most of the validation procedure are based on in-situ data and some satellite data delivered by the Thematic Assembly Centres (Sea Level TAC, Ocean Colour TAC, Sea Surface Temperature TAC, Sea Ice TAC and In Situ TAC).

Moreover, a dedicated task team called the "Product Quality Working Group" has been organizing among the Production Centres a consistent estimation of the relevant accuracy levels for most of the MyOcean products of the catalogue.

These numbers are provided here pdf file CAL/VAL ACCURACY NUMBERS March 18th 2012 .

They are essentially raised by statistics on comparisons with reference information on the ocean dynamics. In parallel, a particular effort has been made by this team :

  • to inform users on the scientific performance of the MyOcean production systems,
  • to describe their components
  • to present the way the "CalVal" activities are carried on.

These informations are summarized in Quality Information Documents (QuIDs)  for most of the MyOcean Products (access the QuIDs through online documentation in the catalogue).

 

 

 UPGRADED AND NEW PRODUCTS FROM 15TH MARCH 2012

 

 

Since March15th, MyOcean catalogue include two brand new reanalysis products:

 

 Geographical Area type Product Specification Customer Name 
ARC ANALYSIS and FORECAST BIO ARCTIC_REANALYSIS_BIO_002_005
BAL ANALYSIS and FORECAST PHYS BALTICSEA_REANALYSIS_PHYS_003_003

 

Few products have changed:

* Update on Sea Level products linked to the new altimeter Cryosat
* Longer period of time for the reanalysis of Global and Arctic Oceans
* Update of the SST Global Ocean products. (Please note : Should you use scripts, these changes will automatically impact them. To let you adapt your scripts, a double diffusion of the current and new SST products will be done from March 15th until May 1st 2012).

For more details, download the following document: xls file MyOcean Product Changes for the 15th March 2012 release

 

 

 

 UPGRADED  PRODUCTS  FROM JANUARY 10th 2012

and TRANSITION PERIOD 



We are preparing a new release of MyOcean products and services.  To ensure continuity of service and support, the original release date of Monday 19th December has been moved to January.


The new date for the release is now Tuesday 10th January 2012 .


 
1. Some of our products will be changing with the new release. Please take a look at our transition document, in which you will find high level information including dataset name changes and details of sample files allowing you to prepare for the next MyOcean phase. xls file Jan.5th 2012 - Products upgrades and Samples - Release Jan.10th 2012


Please note that if you use scripts to download products there may be an impact on your current process and this may require you to update scripts.

Current and changed products will be available in parallel for a period of around 6 weeks  after the release date until beginning of March 2012 (Exact dates  to be confirmed).

 Therefore, if required, you will need to update your scripts within this period. This will ensure you get the correct versions of the products and that your scripts do not fail after the old versions of the products are switched off.

2. MyOcean also proposes 22 new products, hereby listed :

If you experience any problems, please contact the Service desk myocean
 

 UPGRADED AND NEW PRODUCTS FROM 5th JULY 2011

 

Since the MyOcean Web portal upgrade in December 2010, offering more functionality for users, the MyOcean Service has gone through regular improvement phases.
 

The next one will take place on July, 5th 2011. From this date, MyOcean will offer:  
   
         -  Upgrades to existing products
          - New products ( xls file List of new MyOcean products from July 5th 2011 )

New and upgraded products will be available for you to download from 5th July 2011.
 
In order to help you switch over to the upgraded products, MyOcean has arranged a transition period for most of the products.
Current and upgraded versions of these products will be produced in parallel until mid-September 2011 (allowing a 2 months transition period).A detailed list of product name changes, product upgrades and sample file links can be downloaded from here : xls file MyOcean products upgrade, samples and transition period July 5th 2011

 

 

 

 

GLOBAL OCEAN

UPDATE of the North Atlantic and Mediterranean zoom (1/12°)

 

Some users have noticed high salinities in the North and Celtic seas, and fresh anomalies downstream of the Amazon, North of Venezuela and Guyana.On 29/06/2011, the North Atlantic and Mediterranean zoom (1/12°) of the GLOBAL MyOcean analysis and forecasting system configuration will be updated in order to improve scientific data quality.

In order to provide improvement in data quality, we are going to perform a series of modifications to the  system configuration.
The product concerned is the GLOBAL-ANALYSIS-FORECAST-PHYS-001-001-b (ie North Atlantic, Tropical Atlantic and Mediterranean regional product)

What will change :


On 29/06/2011, new data updated in time series will come from the new operational system version. Consequently, this change will introduce a positive qualitative scientific leap in available time series. Practically, in time series, analysis data before 14/06/2011 will come from current configuration whereas analysis and forecasts data starting from 15/06/2011 will come from the new configuration.

Important note: no changes in product name and address, neither on time series length nor product format. It will be transparent for your applications.

 

 
 

 

 GLOBAL OCEAN - ANALYSIS and FORECAST - TEMPERATURE & SALINITY

 

 

GLOBAL products improvement Temperature Global products improvement/Salinity

The accuracy of the global 3D temperature (left) and salinity (right) fields is evaluated calculating their difference (quadratic errors) with synchronous temperature and salinity observation profiles from in-situ data. The closer to zero the curve is, the better it is, as STREAM 1 performance (black curves) shows compared to the past (red curves).

 

  • The STREAM 1 errors (black curves) are significantly reduced with respect to previous product versions (red curves) over the globe and over the whole 2007-2010 period for which the monitoring and forecasting system has been "trained". The accuracy improvements reach 0.2°C and 0.02 psu respectively for temperature and salinity. The blue and green curve illustrate the benefit of using V1 analyses instead of a climatology. The temperature and salinity errors over the 0-500m layer range from two thirds to half that of the climatology in most regions.
  • In general the STREAM 1 global monitoring and forecasting system displays high-level performance and stability for all oceanic variables, and is superior to V0 in many aspects. Sea ice realism is also improved as illustrated here in the Antarctic. The improvements of STREAM 1 include the use of a recent version of NEMO with high frequency atmospheric forcings (3-hourly) and a new rheology for sea ice. The STREAM 1 data assimilation scheme applies an incremental analysis update of T, S, U, V and SSH after the SAM2 analysis, and an additional seasonal bias correction for Temperature and Salinity.


 

ARCTIC OCEAN - ANALYSIS and FORECAST -

SEA ICE IN THE BARENTS SEA

 

 

ARCTIC OCEAN SEA ICE EXTENT BEFORE STREAM 1 ARCTIC OCEAN - SEA ICE EXTENT AFTER STREAM 1

 

Stream 1 models for sea ice extent concentration and drift (coloured curves on the right picture) have improved the representation of real ice fronts compared to the former version (black curve on the left picture) thanks to a better data assimilation algorithm.
 

  • Model improvements relevant for ice edge: Implementation of HYCOM community upgrades (V2.1 to V2.2)
  • Assimilation improvements: Smooth localisation /Stochastic -> deterministic scheme/Assimilation of gridded SLA -> track SLA

 

SEA LEVEL - OBSERVATIONS - SOUTHERN HEMISPHERE

 

 

SEA LEVEL MSLA improvement

 

Old (left) and new (right) Mean Sea Level Anomalies MSLA dataset for day 04/02/2009 in Southern hemisphere highlighting the better spatial coverage in high latitudes (white zone: no coverage).

 

  • The reference surface (or mean profiles) used for SLA computation was improved with the Stream 1 version, taking advantage of the longer temporal coverage and combining twin missions as ERS2/Envisat or Topex-Poseidon/Jason1.
  • Improved quality of the mean profiles, combined with higher quality of the altimeter measurement and processing, allowed us to improve the spatial coverage of the data specially in high latitude areas and coastal areas, as illustrated.
     

 

 

GLOBAL OCEAN - ANALYSIS and FORECAST -

SEA ICE EXTENT IN THE ANTARCTIC

 

 

GLobal Sea Ice extent improvement

 

Stream1 global monitoring and forecasting system (in green) displays high level of performance and stability for oceanic variables, and is superior to the old version (in grey). An example is sea Ice extent, as illustrated here in the Antarctic where prediction (in green) is closer to observation (at the date) than with previous models (in grey).

 

  • The improvements of Stream1 include the use of a recent version of NEMO with high frequency atmospheric forcings (3-hourly) and a new rheology for sea ice.
  • The Stream1 data assimilation scheme applies an incremental analysis update of T, S, U, V and SSH after the SAM2 analysis, and an additional seasonal bias correction for T and S.