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HomeBusinessPre-monsoon season second hottest in India this year; Winters warm up...

Pre-monsoon season second hottest in India this year; Winters warm up faster: Study: The Tribune IndiaNews WAALI

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New Delhi, July 7th

While this year’s summer or pre-monsoon season has surpassed 2016 records as the second-hottest pre-monsoon season in the country, the winter and post-monsoon seasons are warming faster, according to the latest findings from the Center for Science and Environment’s Urban Lab.

According to the study, land surface temperatures in Delhi were the highest since 2010 and the city recorded a significant positive anomaly (temperature higher than expected) in all three temperature parameters.

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To fully understand the warming trend, the Center for Science and Environment (CSE) study analyzed temperature trends by covering all three dimensions of heat stress – surface air temperature, land surface temperature, and relative humidity (heat index).

In Delhi, the air temperature was 1.77 degrees Celsius hotter than in 2010 and the land surface temperature was 1.95 degrees Celsius hotter, the study found.

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According to the CSE analysis, the daily average heat index exceeded 40 degrees Celsius in June 2022. March and April had been unusually dry in Delhi, but humidity had started to rise in May with some scattered rains. However, this increase in humidity has resulted in an increase in the heat index in the city, indicating increased thermal discomfort among the population.

“The highest land surface temperature was observed on May 16, 2020, when 53.9 degrees Celsius was recorded within city limits, followed by May 14, 2022, with a maximum land surface temperature of 51.8 degrees Celsius. In recent years, maximum land surface temperatures have been observed to be in the mid-40s range,” the CSE results said.

It went on to say that during the May 2022 heatwave, land surface temperatures shot to over 38 degrees Celsius across Delhi, which was “unusual as the green pockets within the city have not warmed to this magnitude in recent years.” The average land surface temperature has become higher than the daily average air temperature.

“The industrial and agricultural zone saw the highest increase in land surface temperature between March and May. The regions on the city periphery of north, south-west and north-west of Delhi experienced an extremely high increase in surface temperature from March 19 to May 14, 2022,” the study said.

The study further found that even the temperature of the water bodies rose to 29-30 degrees Celsius in May, which was well below 27 degrees Celsius in March.

According to the CSE analysis on air temperature variations between stations in the city, on May 14, 2022, Chandni Chowk recorded the highest average air temperature at 40.39 degrees Celsius, followed by Punjabi Bagh at 40.29 degrees Celsius, Mundka at 39.5 degrees Celsius and Paharganj with 39.1 degrees Celsius.

CSE said the goal of the city analysis is to understand the combined effect of unusual heat waves caused by climate change.

The study is based on a comparative statistical analysis of temperature anomalies and observed heat-related impacts in Indian cities and regions.

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