Abstract
This study mainly focuses on exploring the regional variation of the changing patterns of temperature and rainfall in Bangladesh. The analysis is based on the temperature and rainfall variation in Bangladesh over five regions as Dhaka, Cox’s Bazar, Rajshahi, Bogra and Sylhet. The duration of the study period was chosen as 1953-2012 for Dhaka, 1948-2012 for Cox’s Bazar, 1972-2012 for Rajshahi, 1958-2012 for Bogra and 1957-2012 for Sylhet. The findings of the non-parametric Mann-Kendal test revealed that significant increase of maximum temperature has been found in Cox’s Bazar and Sylhet, significant decrease of maximum temperature has been found in Dhaka and Bogra. Significant increase of minimum temperature has been found in Dhaka and Cox’s Bazar whereas significant decrease has been found in Rajshahi. Significant decrease of rainfall has been found in Rajshahi among the study region. The maximum temperature increased significantly by 0.021 Degree Celsius per year in Cox’s Bazar and Sylhet. In case of minimum temperature highest increase was found in Dhaka by 0.049 degree Celsius followed by Cox’s Bazar (0.038 degree Celsius per year) whereas significant decrease has been found in Rajshahi by 0.047 degree Celsius per year.
Highlights
Climate change is the long term change in average weather conditions whose main elements are temperature and rainfall
Based on regional trends in temperatures and rainfalls, they concluded that the water scarcity in the dry season might increase and the critical period could become more critical in future
The findings of the non-parametric Mann-Kendal test Table 1 revealed that significant increase of maximum temperature has been found in Cox’s Bazar and Sylhet, significant decrease of maximum temperature has been found in Dhaka and Bogra
Summary
Climate change is the long term change in average weather conditions whose main elements are temperature and rainfall. Mondal and Wasimi [3] analyzed the temperatures and rainfalls of the Ganges Delta within Bangladesh and found an increasing trend of 0.5°C and 1.1°C per century in day-time maximum and night-time minimum temperatures, respectively. They analyzed seasonal rainfalls of the delta. Average maximum and minimum temperatures of December-February period show, respectively, a decreasing and an increasing trend of 0.1°C and 1.6°C per century. Climate Change Cell [6] has analyzed the temperature and sunshine duration at all BMD stations of Bangladesh It has analyzed rainfall trend at eight stations. The two months of April-May were considered as the summer season and the two months of December-
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