Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry
Monitoring melt extent and timing on the Greenland ice sheet is important for tracking the ice sheet's mass and energy balance as well as the global and Arctic climate variability and change. In this study, we use L -band (1.4 GHz) brightness temperature observations collected by NASA&...
Published in: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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Online Access: | https://doi.org/10.1109/JSTARS.2021.3124229 https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429 |
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ftdoajarticles:oai:doaj.org/article:a49c92a7fe0a4bf8bc107243bec3f429 2023-05-15T15:07:54+02:00 Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry Mohammad Mousavi Andreas Colliander Julie Z. Miller Dara Entekhabi Joel T. Johnson Christopher A. Shuman John S. Kimball Zoe R. Courville 2021-01-01T00:00:00Z https://doi.org/10.1109/JSTARS.2021.3124229 https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429 EN eng IEEE https://ieeexplore.ieee.org/document/9599557/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2021.3124229 https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11439-11449 (2021) Earth electromagnetic propagation electromagnetic scattering geophysical inverse problems ice microwave radiometry Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 article 2021 ftdoajarticles https://doi.org/10.1109/JSTARS.2021.3124229 2022-12-31T10:36:31Z Monitoring melt extent and timing on the Greenland ice sheet is important for tracking the ice sheet's mass and energy balance as well as the global and Arctic climate variability and change. In this study, we use L -band (1.4 GHz) brightness temperature observations collected by NASA's soil moisture active passive (SMAP) mission to investigate the extent, duration, and intensity of melt events on the Greenland ice sheet from 2015 to 2021. SMAP provides nearly all-weather surface monitoring over all of Greenland twice daily with morning and evening overpasses at approximately 40-km spatial resolution. We applied empirical threshold and geophysical-model-based algorithms using horizontally and vertically polarized microwave brightness temperature differences to quantify both the intensity and extent of surface melting. Analysis of the melt seasons shows that Greenland experienced unusually strong melt events at the end of July 2019 and on August 14, 2021, which extended the melt area across much of the dry snow zone over a period of one and two days, respectively. In situ temperatures measured at Greenland's Summit station confirm the above freezing temperatures during these extreme events. Article in Journal/Newspaper Arctic Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Arctic Greenland IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 14 11439 11449 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Earth electromagnetic propagation electromagnetic scattering geophysical inverse problems ice microwave radiometry Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Earth electromagnetic propagation electromagnetic scattering geophysical inverse problems ice microwave radiometry Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Mohammad Mousavi Andreas Colliander Julie Z. Miller Dara Entekhabi Joel T. Johnson Christopher A. Shuman John S. Kimball Zoe R. Courville Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
topic_facet |
Earth electromagnetic propagation electromagnetic scattering geophysical inverse problems ice microwave radiometry Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
description |
Monitoring melt extent and timing on the Greenland ice sheet is important for tracking the ice sheet's mass and energy balance as well as the global and Arctic climate variability and change. In this study, we use L -band (1.4 GHz) brightness temperature observations collected by NASA's soil moisture active passive (SMAP) mission to investigate the extent, duration, and intensity of melt events on the Greenland ice sheet from 2015 to 2021. SMAP provides nearly all-weather surface monitoring over all of Greenland twice daily with morning and evening overpasses at approximately 40-km spatial resolution. We applied empirical threshold and geophysical-model-based algorithms using horizontally and vertically polarized microwave brightness temperature differences to quantify both the intensity and extent of surface melting. Analysis of the melt seasons shows that Greenland experienced unusually strong melt events at the end of July 2019 and on August 14, 2021, which extended the melt area across much of the dry snow zone over a period of one and two days, respectively. In situ temperatures measured at Greenland's Summit station confirm the above freezing temperatures during these extreme events. |
format |
Article in Journal/Newspaper |
author |
Mohammad Mousavi Andreas Colliander Julie Z. Miller Dara Entekhabi Joel T. Johnson Christopher A. Shuman John S. Kimball Zoe R. Courville |
author_facet |
Mohammad Mousavi Andreas Colliander Julie Z. Miller Dara Entekhabi Joel T. Johnson Christopher A. Shuman John S. Kimball Zoe R. Courville |
author_sort |
Mohammad Mousavi |
title |
Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
title_short |
Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
title_full |
Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
title_fullStr |
Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
title_full_unstemmed |
Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP L -Band Microwave Radiometry |
title_sort |
evaluation of surface melt on the greenland ice sheet using smap l -band microwave radiometry |
publisher |
IEEE |
publishDate |
2021 |
url |
https://doi.org/10.1109/JSTARS.2021.3124229 https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland Ice Sheet |
genre_facet |
Arctic Greenland Ice Sheet |
op_source |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11439-11449 (2021) |
op_relation |
https://ieeexplore.ieee.org/document/9599557/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2021.3124229 https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429 |
op_doi |
https://doi.org/10.1109/JSTARS.2021.3124229 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
14 |
container_start_page |
11439 |
op_container_end_page |
11449 |
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1766339330794586112 |