Climate change vulnerability in Bangladesh based on trend analysis of some extreme temperature indices

Extreme temperature is the key indicator of extreme climatic events. The goal of this research was to better understand the long-term trends and shifting behaviors associated with Bangladesh's record-breaking high temperatures in the country's atmosphere. Data from 26 Bangladeshi meteorological stations collected between 1981 and 2018 was analyzed with RClimDex. The annual count of warm (cold) spell duration increased, according to the findings (decrease). In the coastal regions, this rising temperature trend is more pronounced. There were longer (shorter) periods of warm (cold) weather in the twentieth century than there were in the previous decade. As a result, the length of warm (cold) spells has become longer since the beginning of the twenty-first century, as compared to the last quarter of the twentieth century. There is little fluctuation in diurnal temperatures, but they are getting smaller and smaller. There is a 13% decrease in the Cold Spell Duration Indicator (CSDI), which indicates that we are in for a long, cold winter. At a rate of 14% per year, the Warm Spell Duration Indicator (WSDI) annual count suggests an extremely hot summer is imminent. Diurnal temperature range (DTR) values decreased by 1.1% year-round, raising the specter of climate extremes like the CSDI and WSD. An increasing (decreasing) trend in indicators of how long hot (cold) weather lasts indicates an increase (decrease) in Bangladesh's warm atmosphere. As a result, an increase in the number of extreme weather events, particularly along the coasts, should be expected across the country.

Automated summary

This research analyzed data from 26 meteorological stations in Bangladesh between 1981 and 2018 to study the long-term trends and shifting behaviors associated with the country's record-breaking high temperatures. The findings show an increasing trend in warm spell duration, particularly in coastal regions. The length of warm spells has become longer since the beginning of the twenty-first century. Diurnal temperatures show little fluctuation but are gradually decreasing. The study suggests a decrease in the Cold Spell Duration Indicator (CSDI), indicating a long, cold winter ahead, and an annual increase in the Warm Spell Duration Indicator (WSDI), suggesting an extremely hot summer. An increasing trend in indicators of how long hot weather lasts indicates an increase in extreme weather events across the country, especially along the coasts.