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- Title
Brief communication: Mapping Greenland's perennial firn aquifers using enhanced-resolution L-band brightness temperature image time series.
- Authors
Miller, Julie Z.; Long, David G.; Jezek, Kenneth C.; Johnson, Joel T.; Brodzik, Mary J.; Shuman, Christopher A.; Koenig, Lora S.; Scambos, Ted A.
- Abstract
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 km 2.
- Subjects
GREENLAND; UNITED States. National Aeronautics &; Space Administration; TIME series analysis; AQUIFERS; COHERENT radar; GREENLAND ice; ICE sheets; BRIGHTNESS temperature
- Publication
Cryosphere, 2020, Vol 14, Issue 9, p2809
- ISSN
1994-0416
- Publication type
Article
- DOI
10.5194/tc-14-2809-2020