Journal
JOURNAL OF GLACIOLOGY
Volume 65, Issue 251, Pages 481-493Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/jog.2019.26
Keywords
electromagnetic induction; ice thickness measurements; laser altimetry; remote sensing; sea ice
Funding
- Ministry of Economy and Competitiveness, Spain
- FEDER EU through the National R + D Plans PROMISES Project [ESP2015-67549-C3-2-R]
- FEDER EU through L-Band Project [ESP2017-89463-C3-1-R]
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Arctic sea ice is going through a dramatic change in its extent and volume at an unprecedented rate. Sea-ice thickness (SIT) is a controlling geophysical variable that needs to be understood with greater accuracy. For the first time, a SIT-retrieval method that exclusively uses only airborne SIT data for training the empirical algorithm to retrieve SIT from Soil Moisture Ocean Salinity (SMOS) brightness temperature (TB) at different polarization is presented. A large amount of airborne SIT data has been used from various field campaigns in the Arctic conducted by different countries during 2011-15. The algorithm attempts to circumvent the issue related to discrimination between TB signatures of thin SIT versus low sea-ice concentration. The computed SIT has a rms error of 0.10 m, which seems reasonably good (as compared to the existing algorithms) for analysis at the used 25 km grid. This new SIT retrieval product is designed for direct operational application in ice prediction/climate models.
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