Measuring Greenland Ice Sheet Melt Using Spaceborne GNSS Reflectometry From TechDemoSat-1
The capability of spaceborne Global Navigation Satellite System-reflectometry (GNSS-R) for Greenland ice sheet melt detection is investigated using the TechDemoSat-1 satellite (TDS-1) data. The melt detection is based on the sensitivity of GNSS-R signal to the presence of liquid water in snow pack....
| Published in: | Geophysical Research Letters |
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| Main Authors: | , , , , |
| Other Authors: | |
| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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John Wiley & Sons
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10261/236224 https://doi.org/10.1029/2019GL086477 https://doi.org/10.13039/501100003329 |
| Summary: | The capability of spaceborne Global Navigation Satellite System-reflectometry (GNSS-R) for Greenland ice sheet melt detection is investigated using the TechDemoSat-1 satellite (TDS-1) data. The melt detection is based on the sensitivity of GNSS-R signal to the presence of liquid water in snow pack. Statistical analysis during the 2018 melt season shows melt detection using GNSS-R is possible with an agreement of 90% comparing to the microwave radiometer (MWR) data. In 37% of the cases GNSS-R detects melting when MWR does not. The inconsistency observed between GNSS-R and MWR is mainly due to the different features of the two observation concepts and the limitations of currently available GNSS-R data. Furthermore, the large penetration depth of the GNSS signal can potentially provide complementary information on melt occurrence in ice sheet subsurface. These results show the potential of future GNSS-R missions for ice sheet melt detection. This work was supported in part by theSpanish Ministry of Economy and Competitiveness under Grant ESP2015-70014-C2-2-R and Grant RTI2018-099008-B-C22(MCIU/AEI/FEDER, UE) |
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