Background
The EUMETSAT ROM SAF has produced two atmospheric reanalyses as part of its CDOP-2 activities. These reanalyses were recommended by the IROWG climate subgroup (see recommendation 6 to CGMS, in section 4.2), where is it was stated that:
"Encourage NWP centers to engage in reanalysis activities based only on data types that are not bias-corrected, especially RO. ECMWF, e.g., carries out such an activity as part of the ROM SAF CDOP-2 plans."
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This atmospheric reanalysis data is available for the surface, on 37 fixed pressure levels and on 137 model levels.
A selection of science results presented at the Joint 6th ROM SAF User Workshop and 7th IROWG Workshop are given here.
This data has also been used to demonstrate how QBO zonal wind information can be retrieved from GNSS-RO measurements - click here.
Access to the ROM SAF data using
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Web API
The ROM SAF datasets can be retrieved using the ECMWF web-api Web API service. The web-api Web API is a "programmatic approach" for data download using python scripts.
Frequently asked web - api questions (FAQs) can be found here.: Web API FAQ
General information on downloading with web - api is given here:
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Specifically, follow the steps here to install the latest code version:
https://pypi.org/project/ecmwf-api-client/
Retrieval efficiency when using
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Web API
The importance retrieval efficiency when using web-api Web API is discussed here. This page includes web-api Web API retrieval examples for other reanalyses, such as ERA5.
Specific examples of efficient, working scripts
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for the ROM SAF reanalyses are given here.
These are based on examples used for other reanalyses and they can be adapted easily to the users needs.