Comparative Study for ECHAM5 and SDSM in Downscaling Temperature for a Geo-Climatically Diversified Region, Pakistan
- 1 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
- 2 Research & Development Division, Pakistan Metrological Department, Islamabad, Pakistan
- 3 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
- 4 Research & Development Division, Pakistan Metrological Department, Islamabad, Pakistan
Abstract
Pakistan is a country with diversified feat ures in terms of geography and climate. It is an agriculture based country, mainly dependent on Indus water system. In Pakistan , there are loftyplateaus to the north and Arabian Sea in the south, while the interior portion is covered with plateaus or agriculture plains. For such a region , any attempt to monitor/analyze climatic data requires some more specific detail s . A statistical software “ SDSM ” is utilized for downscaling daily temperature data of Pakistan and the results generated are compared with the output of a recommended model “ECHAM5”. After analysis , it revealed that comparatively SDSM produced much better results. The outputs from both the approaches were correlated with the observed data; SDSM-observed gave values for correlation coefficient R 2 in the range of 81% - 94% whereas ECHAM5-observed pro duced 73% - 87% for different meteorological stations of Pakistan. On the basis of this study, SDSM can be recommended for future scenario generation of temperature data of Pakistan as well.
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