A NEW GEOPHYSICAL MODEL BASED ALGORITHM TO DETCET MELT EVENTS OVER THE ANTRACTIC ICE SHEET USING SMAP MICROWAVE RADIOMETRY

Seyedmohammad Mousavi, Andreas Colliander, Julie Z. Miller, John S. Kimball

Research output: Contribution to conferencePaperpeer-review

Abstract

Low frequency microwave measurements have been used to gain insight into what happens deep inside ice sheets for some time. In this paper, the response of SMAP (Soil Moisture Active Passive) L-band measurements to surface melting of the ice sheet from 2015 through 2019 is investigated. SMAP covers virtually the entire Antarctica ice sheet twice a day with its L-band (1.4 GHz) radiometer. The overpasses center on morning and evening hours as the satellite is on a 6 AM/6PM equator-crossing orbit. The spatial resolution of the instrument is about 40 km. We applied a newly developed geophysical model-based algorithm to detect snow wetness, which can be used as an indicator of melt extent and intensity. It is shown that the ice sheet experienced extensive surface melting during the 2015-2016 melt season (~10% melt extent), and also underwent intensive melting in the 2019-2020 season (median of 0.3% snow wetness), particularity on the West Antarctic Ice Sheet.

Original languageEnglish
Pages5536-5539
Number of pages4
DOIs
StatePublished - 2021
Event2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021 - Brussels, Belgium
Duration: Jul 12 2021Jul 16 2021

Conference

Conference2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021
Country/TerritoryBelgium
CityBrussels
Period07/12/2107/16/21

Keywords

  • Antarctica
  • ice sheet
  • melt events
  • microwave remote sensing
  • SMAP radiometer

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