ISAS temperature and salinity gridded fields

Date 2021-07-20
Author(s) Kolodziejczyk NicolasORCID1, Prigent-Mazella Annaig1, Gaillard FabienneORCID1
Affiliation(s) 1 : LOPS – UMR 6523 CNRS, Ifremer, IRD, UBO - SNO-Argo-France
DOI 10.17882/52367
Publisher SEANOE
Keyword(s) climate variability, ocean heat content, fresh water cycle
Abstract

The In Situ Analysis System (ISAS) was developed to produce gridded fields of temperature and salinity that preserve as much as possible the time and space sampling capabilities of the Argo network of profiling floats. ISAS is based on Optimal Interpolation method. Since the first global re-analysis performed in 2009, the system has been extended to accommodate all types of vertical profile as well as time series. ISAS gridded fields are entirely based on in-situ measurements. The system aims at monitoring the time evolution of ocean properties for climatic studies and allowing easy computation of climate indices. Delayed Mode (D) profiles are used a much as possible and extra visual check is carried out. The ISAS procedure and products are described in Gaillard et al. (2016). The present DOI provides both analyzed fields and standardized profiles data used in interpolation

 

HISTORY

 

ISAS20_ARGO: The ISAS20_ARGO release is interpolated on 187 standard depth levels between 0-5500 m depth and 0.5°x0.5° global horizontal grid. ISAS20 use the version 8 of ISAS and updated statistics to produce the monthly analysis (Monthly Climatology and annual STD computed from WOA18A5B7). ISAS20 gridded fields analyze the Argo and Deep-Argo temperature and salinity data alone between 2002-2020.

 

ISAS17: The ISAS17 release is interpolated on 187 standard depth levels between 0-5500 m depth and 0.5°x0.5° global horizontal grid. ISAS17 use the version 8 of ISAS and updated  statistics to produce the monthly analysis (Monthly Climatology and annual STD computed from WOA18A5D). ISAS17 gridded fields analyze the Argo and Deep-Argo temperature and salinity profiles, and other in situ measurements between 2002-2017 to complete observations, including the higher latitudes (typically poleward of 60°S-N) where Argo sampling is sparse or not existent.

 

ISAS-SSS : The ISAS-SSS release is interpolated on 4 standard depth levels (1-3-5-10m depth) and 0.5°x0.5° global horizontal grid between 2002-2015. ISAS-SSS use the version 7 of ISAS and updated the statistics to produce the monthly analyses (Monthly Climatology computed from ISAS13 and annual STD computed from Argo dataset). ISAS-SSS gridded fields analyze the Argo  and other in situ salinity data, including TSG from research and ship of opportunity from French SNO-SSS.

 

ISAS15 : The ISAS15 release is interpolated on 152 standard depth levels between 0-2000 m depth and 0.5°x0.5° global horizontal grid between 2002-2015. ISAS15 use the version 7 of ISAS and updated  statistics to produce the monthly analysis (Monthly Climatology computed from ISAS13 and annual STD computed from Argo dataset). ISAS15 gridded fields analyze the Argo temperature and salinity data alone in its ISAS15_ARGO configuration; or Argo plus other in situ measurements in its ISAS15 configuration.

 

ISAS13 : The ISAS13 release is interpolated on 152 standard depth levels between 0-2000 m depth and 0.5°x0.5° global horizontal grid  between 2002-2012. ISAS13 use the version 6 of ISAS and updated statistics to produce the monthly analysis (Monthly Climatology computed from ISAS11 and annual STD computed from Argo dataset). ISAS13 gridded fields analyze the Argo temperature and salinity data and other in situ measurements between 2002-2012.

Licence CC-BY
Data
File Size Format Processing Access Key
Readme 641 KB PDF Open access 86436
ISAS13 27 GB NC, NetCDF Processed data Open access 86439
ISAS15 67 GB NC, NetCDF Processed data Open access 86440
ISAS17 43 GB NC, NetCDF Processed data Open access 86441
ISAS20_ARGO 51 GB NC, NetCDF Processed data Open access 86442
ISAS-SSS 469 MB NC, NetCDF Processed data Open access 86444
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How to cite 

Kolodziejczyk Nicolas, Prigent-Mazella Annaig, Gaillard Fabienne (2021). ISAS temperature and salinity gridded fields. SEANOE. https://doi.org/10.17882/52367


In addition to properly cite this dataset, it would be appreciated that the following work(s) be cited too, when using this dataset in a publication :


Gaillard Fabienne, Reynaud Thierry, Thierry Virginie, Kolodziejczyk Nicolas, von Schuckmann Karina (2016). In-situ based reanalysis of the global ocean temperature and salinity with ISAS: variability of the heat content and steric height. Journal Of Climate, 29(4), 1305-1323. Publisher's official version : https://doi.org/10.1175/JCLI-D-15-0028.1 , Open Access version : https://archimer.ifremer.fr/doc/00309/42030/