Brief communication: Mapping Greenland's perennial firn aquifers using enhanced-resolution L-band brightness temperature image time series

Autor:	J. Z. Miller, D. G. Long, K. C. Jezek, J. T. Johnson, M. J. Brodzik, C. A. Shuman, L. S. Koenig, T. A. Scambos
Jazyk:	angličtina
Rok vydání:	2020
Předmět:	Environmental sciences GE1-350 Geology QE1-996.5
Zdroj:	The Cryosphere, Vol 14, Pp 2809-2817 (2020)
Druh dokumentu:	article
ISSN:	1994-0416 1994-0424
DOI:	10.5194/tc-14-2809-2020
Popis:	Enhanced-resolution L-band brightness temperature (TB) image time series generated from observations collected over the Greenland Ice Sheet by NASA's Soil Moisture Active Passive (SMAP) satellite are used to map Greenland's perennial firn aquifers from space. Exponentially decreasing L-band TB signatures are correlated with perennial firn aquifer areas identified via the Center for Remote Sensing of Ice Sheets (CReSIS) Multi-Channel Coherent Radar Depth Sounder (MCoRDS) that was flown by NASA's Operation IceBridge (OIB) campaign. An empirical algorithm to map extent is developed by fitting these signatures to a set of sigmoidal curves. During the spring of 2016, perennial firn aquifer areas are found to extend over ∼66 000 km2.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/5b88ade385654f80828b3a9bc5768161 Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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