Abstract
Climate change and its impact on environment is become the hot topic in the world. Bangladesh is a highly populated developing and agro-based economic country. Impact of several climatic factors such as rainfall, air temperature, humidity on agriculture is immense. But changes found in the trend of these climatic factors in here. This research aimed to detect the trend of three climatic factors, rainfall, temperature, and humidity over last 42 years (1981–2022) and along this, to explore the relation between vegetation coverage and climatic factors. The entire analysis is conducted for Upazilla level in Bangladesh. Maan-Kendal Test and Sen slope estimation is followed to detect the trend of three climatic factors and multiple regression model, Geographically Weighted Regression (GWR) Model and Ordinary Least Square (OLS) Regression Model is applied to explore the relationship between vegetation coverage and climatic factors. Positive trend is found for rainfall (24–147 mm/year) and humidity (0.16% − 0.47%) but negative trend is detected for temperature (− 0.03 to 0.00 ℃) for some Upazilla in Bangladesh. By GWR model, ranges of very weak to weak influence of vegetation coverage on the climatic factors are found for most of the Upazilla in Bangladesh. From the results of OLS, very strong correlation is found between the change rate of vegetation coverage and climatic factors for most of the Upazilla in Bangladesh especially the Upazilla of Sylhet and Chittagong Division. As Upazilla Master Plan is initiated in Bangladesh for each Upazilla, the outcomes of this research will help the policy makers to take the suitable plan for environment as well as agricultural development for each Upazilla through which sustainable development can be ensured.