Advanced melt indicators from passive microwave satellite observations in Antarctica ...
<!--!introduction!--> Liquid water has a significant impact on the microwave emissivity of the surface and, since decade, passive microwave observations are using to detect melt over ice sheet. However, the produced indicators are usually based on a single frequency and have different sensibil...
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Online Access: | https://dx.doi.org/10.57757/iugg23-1639 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017945 |
| Summary: | <!--!introduction!--> Liquid water has a significant impact on the microwave emissivity of the surface and, since decade, passive microwave observations are using to detect melt over ice sheet. However, the produced indicators are usually based on a single frequency and have different sensibilities. In the framework of the ESA 4D-Antarctica project, we propose to combine the binary melt indicators from the single-frequency to provide enhanced insights of the melt process. We focus on the 36 GHz and 19 GHz observations from the Advanced Microwave Scanning Radiometer 2 (AMSR2) satellite and the 1.4 GHz observations from the Soil Moisture and Ocean Salinity (SMOS) satellite. A deep theoretical analysis has been performed to explore the sensitivity of these frequencies to wet snow. In particular, 36 GHz distinguishes different stage of close surface melting and 1.4 GHz identifies the most intense period of melt during the summer. Moreover, AMSR2 provides observations in the afternoon (ascending pass) and ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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