Report: TCCON GGG2020 switch to GEOS IT met products
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1.
Jet Propulsion Lab
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2.
California Institute of Technology
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3.
University of Toronto
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4.
National Institute of Water and Atmospheric Research
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5.
Sorbonne University
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6.
Finnish Meteorological Institute
Description
The GGG2020 TCCON data product relies on the Goddard GEOS product for a priori meteorological information. In particular, it was developed with the GEOS FP-IT (Forward Processing for Instrument Teams) product, as we required the longer record of FP-IT (circa 2000 on) compared to the more recent FP product (circa 2013 on). In 2023, we were informed that the FP-IT product would be succeeded by the GEOS IT product. Due to the effort required to perform a full reprocessing of the TCCON data set (∼ 30 sites with records up to 10 years long), it is not practical at this time to redo the GGG2020 retrievals with the GEOS IT input data. Therefore, we have made arrangements to switch our retrievals over to the GEOS IT product starting at midnight UTC, 1 Apr 2024. This date was chosen to coincide with the switch of OCO-2 and -3 processing to also use GEOS IT, rather than GEOS FP-IT. This document describes the testing done to quantify the impact this change will have on the GGG2020 data product.
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- Created
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2024-04-22