Variability and trend detection of temperature and rainfall: A case study of Bengal duars

Abstract

The Bengal Duars, a beauty of Himalayan foothills extended from river Tista to Sankosh as a unique landscape assemblage with forest cover. In the present study, the annual and seasonal variability and trend of temperature and rainfall in Bengal Duars based on more than 100 years’ climatic data is explored. The study revealed that the degree of warming is prominent over all seasons. But the trend of rainfall varies in different seasons. The variability in climate has studied by calculating anomalies, where the oscillating trend has observed throughout the long period. But the significant rising trend of annual average temperature is noticed from 1985 onwards. On the other hand, rainfall extreme become 5% higher since the 1990’s.