Mass Trend Time Series for the Greenland Ice Sheet and Periphery Glaciers from the Combination of Gravimetric and Geometric Data ...
<!--!introduction!--> The geometric method, which applies altimetry data for the estimation of changing ice volumes, makes it possible to estimate changes in ice volume with a very high resolution. However, the volume has to be converted to mass via a density model, which could have model unce...
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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/iugg23-1499 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017100 |
| Summary: | <!--!introduction!--> The geometric method, which applies altimetry data for the estimation of changing ice volumes, makes it possible to estimate changes in ice volume with a very high resolution. However, the volume has to be converted to mass via a density model, which could have model uncertainties. The gravimetric method, which mainly focuses on the evaluation of GRACE time series, delivers a mass change map with a very rough resolution of only a few 100 km. Ice mass estimations, only based on gravity field time series, suffer from the so-called leakage effect. There are physically unreasonable assignments of negative mass changes to nearby oceanic areas. However, the mass changes are directly referred to changing gravity. In order to estimate high-resolution ice mass balances for the Greenland ice sheet and its periphery, we combine gravity field time series and geometric information . We integrate geometric information in order to localize regions, where one can expect immense mass changes. By ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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