Climate change impacts on Central Asian water resources M. Malsy, T. Aus der Beek, S. Eisner, and M. Flörke Center for Environmental Systems Research, University of Kassel, Wilhelmshöher Allee 47, 34109 Kassel, Germany
Abstract. Central Asia is in large parts dominated by low precipitation and,
consequentially, by low water availability. Therefore, changes of natural
water resources induced by climate change are of high interest. The aim of
this study is to analyse the potential impact of climate change on Central
Asian water resources until the end of the 21st century and to point
out the main affected regions. Thus, simulations with the large-scale
hydrology model WaterGAP3 for the baseline and scenario periods were
performed with outputs from three General Circulation Models (GCMs: ECHAM5,
IPSL-CM4, and CNRM-CM3) and two IPCC-SRES emission scenarios (A2 and B1).
The results show that mean modelled annual water availability increases for
all scenarios and GCMs while CNRM-CM3 induces the wettest water situation
for the 2085s and ECHAM5 the lowest water availability. Furthermore, robust
trends to wetter or dryer conditions could be found for many basins. A
seasonal shift of mean modelled water availability could be derived for
ECHAM5 which does not show a second peak during summer. The application of
daily input data showed no improvement of modelled monthly river discharges
for most Central Asian basins compared to monthly input data.
Citation: Malsy, M., Aus der Beek, T., Eisner, S., and Flörke, M.: Climate change impacts on Central Asian water resources, Adv. Geosci., 32, 77-83, doi:10.5194/adgeo-32-77-2012, 2012.