Climate Data Record AMVs from LEO-Satellites
Within the Copernicus Climate Change Service (C3S), EUMETSAT generated Climate Data Records (CDRs) for Atmospheric Motion Vectors (AMVs). EUMETSAT’s own algorithms were adapted from near real time operations to use in the CDR productions. We produced CDRs for several EUMETSAT and other agencies satellites. EUMETSAT AMV CDRs are planned to be assimilated into the 6th European Re-Analysis (ERA6) at the European Centre for Medium range Weather Forecast (ECMWF) as well as in the European regional reanalysis.
EUMETSAT is operating the Low Earth Orbiting (LEO) Metop satellites. The first one, Metop-A, was launched in 2006, followed by Metop-B in 2012 and Metop-C in 2018. All three carry the Advance Very High Resolution Radiometer (AVHRR) instrument. The same instrument, which has been flown on all the NOAA satellites since 1979. Allowing us to generate two climate data records for AMVs using the AVHRR infrared (channel 4) images. The first containing polar AMVs using AVHRR in the full Local Area Coverage (LAC) resolution from one Metop satellite. Since the launch of Metop-B, it is also possible to retrieve AMVs over the entire globe using successive images from the two satellites.
As the AVHRR instrument was flown on 16 different LEO satellites since TIROS-N in 1979, a second CDR containing polar AMVs based on the coarser Global Area Coverage (GAC) resolution, covering the period from 1979 to 2019 has been released. The long-term analysis shows a high quality of the CDR, making it an import source of wind information for global and regional re-analysis projects and climate studies.
This talk will feature both AMV CDRs; the single and dual Metop LAC AMV and the GAC AMV CDR from AVHRR on-board Metop, NOAA and TIROS-N satellites ranging from 1979 to 2019. The presentation will provide an overview of both CDRs highlighting the main validation results and potential usage.
