All-Weather Geophysical Model Function for Wind Speed Retrievals from AMSR2

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Abstract

This paper describes the development of a new all-weather geophysical model function (AW-GMF) for the purpose of retrieving sea surface wind (SSW) under all weather conditions. The AW-GMF makes use of the Advanced Microwave Scanning Radiometer-2 (AMSR2) dual-polarized C-, X-, and K-band channels. We show how the linear combination of these channels significantly mitigate the effect of rain contamination while maintaining sensitivity to SSW regimes including tropical and extra-tropical cyclones. AW-GMF was trained using 750 AMSR2 hurricane overpasses from 2013-2021. The Global Data Assimilation System (GDAS) 0.25° resolution product and the Hurricane Weather Research and Forecasting Model (HWRF) were used as the assumed surface truth. Preliminary results show that SSW retrievals using the AW-GMF are much less susceptible to rain and capable of retrieving hurricane force winds.

Original languageEnglish
Title of host publicationIGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6915-6918
Number of pages4
ISBN (Electronic)9781665427920
DOIs
StatePublished - 2022
Event2022 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2022 - Kuala Lumpur, Malaysia
Duration: Jul 17 2022Jul 22 2022

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)
Volume2022-July

Conference

Conference2022 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2022
Country/TerritoryMalaysia
CityKuala Lumpur
Period07/17/2207/22/22

Keywords

  • all-weather
  • AMSR2
  • geophysical model function
  • microwave radiometry
  • tropical cyclones
  • wind speed

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