CHANGE OF FUTURE CLIMATE EXTREMES FOR THE HAOR BASIN AREA OF

Haors located in the north-eastern region of Bangladesh are characterized by large round shaped floodplain depressions and marshy lands. But the Surma-Kushiyara river system known as Haor basin is anticipated to be under additional stress that climate change will certainly bring to its temperature and rainfall pattern. Therefore, daily temperature and precipitation simulations of 17-member ensembles generated by Hadley Centre Coupled Model (HadCM3) of PRECIS (Providing REgional Climates for Impact Studies) which corresponds to the IPCC-SRES A1B emission scenario are examined to project various aspects of future temperature and rainfall extremes, their magnitude and frequencies. Rclimdex software is used to determine 27 standardized set of extreme indices and they were compared over the space and three time slices, viz. short (2020s, i.e. 2011–2040), medium (2050s, i.e. 2041–2070) and long (2080s, i.e. 2071– 2098) considering the 1980s (1971-2000) as the baseline period. For the purpose of analysis three transboundary river systems, namely, Meghalaya, Tripura and Barak are also taken into consideration as they will ultimately contribute to the overall assessment of the hydrologic cycle of Haor basin. This study finds highest variability in both rainfall and temperature during th