Separating Long?Term and Short?Term Mass Changes of Antarctic Ice Drainage Basins: A Coupled State Space Analysis of Satellite Observations and Model Products

Satellite gravimetry and altimetry measurements record gravity elevation changes, respectively, which are useful for determining mass volume change of the Antarctic Ice Sheet. Common methods employ products from regional climate modeling firn to aid interpretation link changes changes. Estimating deterministic parameters over defined time periods is a conventional way evaluate those To overcome limitations analyses with respect time-variable signals, we have developed state-space model framework. Therein, jointly four data sets by coupling temporal signal variations. We identify long-term signals ice drainage basins that observed satellite mission GRACE several missions April 2002 until August 2016. The degree can separate short-term variations strongly depends on similarity series. For system Pine Island Glacier (West Antarctica), our results show noticeable trend an acceleration contribution dynamics balance ?11 ± 8 ?58 Gt a?1. Our in Dronning Maud Land (East Antarctica) positive at almost constant rate. presented approach fit without artificial selection interest. Furthermore, because only enforce common between data, differences mean rates help uncover discrepancies.