Observations of Lake Baikal ice from satellite altimetry and radiometry

摘要: We demonstrate the potential of combining satellite altimetry and radiometry for lake ice studies using example Lake Baikal in Siberia. show synergy active passive microwave observations available from recent missions (TOPEX/Poseidon, Jason-1, ENVISAT Geosat Follow-On), complemented by SSM/I data. assess applicability altimetric radiometric data ice/water discrimination, discuss drawbacks benefits each type sensor. An discrimination method, based on combined use four SSM/I, is proposed validated situ MODIS imagery. The method applied to entire set used define specific dates events (first appearance ice, formation stable cover, first open water, complete disappearance ice) associated uncertainties. Using these satellite-derived estimates, we can extend existing time series Southern up 2004 provide new information Middle Northern Baikal, regions where no cover are available. Our that over last 10–15 years, trends towards earlier later break-up result a tendency longer fast duration whole Baikal. methods here have been tested but they applicable other lakes water bodies with seasonal cover.