Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-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 <italic>L</italic>-band (1.4 GHz) brightness temperature observ...

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Autores principales:	Mohammad Mousavi, Andreas Colliander, Julie Z. Miller, Dara Entekhabi, Joel T. Johnson, Christopher A. Shuman, John S. Kimball, Zoe R. Courville
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Earth electromagnetic propagation electromagnetic scattering geophysical inverse problems ice microwave radiometry Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429
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spelling	oai:doaj.org-article:a49c92a7fe0a4bf8bc107243bec3f4292021-11-20T00:00:24ZEvaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry2151-153510.1109/JSTARS.2021.3124229https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f4292021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9599557/https://doaj.org/toc/2151-1535Monitoring 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 <italic>L</italic>-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. <italic>In situ</italic> temperatures measured at Greenland's Summit station confirm the above freezing temperatures during these extreme events.Mohammad MousaviAndreas CollianderJulie Z. MillerDara EntekhabiJoel T. JohnsonChristopher A. ShumanJohn S. KimballZoe R. CourvilleIEEEarticleEarthelectromagnetic propagationelectromagnetic scatteringgeophysical inverse problemsicemicrowave radiometryOcean engineeringTC1501-1800Geophysics. Cosmic physicsQC801-809ENIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 11439-11449 (2021)
institution	DOAJ
collection	DOAJ
language	EN
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 <italic>L</italic>-Band Microwave Radiometry
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 <italic>L</italic>-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. <italic>In situ</italic> temperatures measured at Greenland's Summit station confirm the above freezing temperatures during these extreme events.
format	article
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 <italic>L</italic>-Band Microwave Radiometry
title_short	Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry
title_full	Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry
title_fullStr	Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry
title_full_unstemmed	Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry
title_sort	evaluation of surface melt on the greenland ice sheet using smap <italic>l</italic>-band microwave radiometry
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/a49c92a7fe0a4bf8bc107243bec3f429
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Evaluation of Surface Melt on the Greenland Ice Sheet Using SMAP <italic>L</italic>-Band Microwave Radiometry

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