Water storage changes in the Lena watershed, Siberia observed by GRACE and satellite altimetry


Contact
vey [ at ] ife.uni-hannover.de

Abstract

Hydrological processes in permafrost regions are very sensitive to climate change. Siberia is affected in particular, as it experiences a stronger warming trend than the global average. We use data from the Gravity Recovery and Climate Experiment (GRACE) satellite mission to study inter-annual water mass variations in the Siberian permafrost between 2003 and 2010. The observed mass changes indicate long-term changes in the hydrological budget of the large Siberian watersheds. For selected lakes in the Lena basin, we employ satellite radar altimetry observations to estimate water storage changes related to lake level variations. Large parts of Siberia are covered by thousands of lakes. As consequence of a strong wetting trend in this region lake levels are rising. The lake level rise can explain about half of the mass increase observed by GRACE. Other potential reasons for water storage variations such as changes in lake surface extension, soil moisture and the talik formation are discussed.



Item Type
Conference (Poster)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
American Geophysical Union Fall Meeting, 06 Dec 2011 - 10 Dec 2011, San Francisco, USA.
Eprint ID
26003
Cite as
Vey, S. , Crétaux, J. F. , Müller, J. and Boike, J. (2011): Water storage changes in the Lena watershed, Siberia observed by GRACE and satellite altimetry , American Geophysical Union Fall Meeting, San Francisco, USA, 6 December 2011 - 10 December 2011 .


Share

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item