Climate change has a detrimental impact on human health due to increasing temperature extremes. It is undoubtedly true over India, where in recent decades, a rise in the frequency and intensity of extreme events is witnessed. The present study primarily focuses on understanding the dynamics of the hot season over homogeneous regions of India. Using Canonical Correlation Analysis, five temperature homogeneous regions are defined. All regions showed a positive trend with less interannual variability, except Gangetic plains. The seasonal composites for extreme temperature years show that hot season over North India (NI) occurs mainly due to blocking high in upper atmospheres. Similarly, daily temperature anomalies for the heatwave days during hot years exhibit stationarity of such blocks centered over the region. Two global teleconnections have been found to be responsible for the NI seasonal anomaly, (i) a continuous anomalous low over Europe Granger cause anomalous high across the region, (ii) the subtropical jet stream and the polar jet stream help to maintain stationarity of anticyclonic blocks over the region. Sinking of air due to an upper atmospheric high over NI causes adiabatic warming near the surface. Southern India mainly gets heated due to warm air intrusion from northwest regions, contributing to anomalous low humidity over the southern coastal regions. This phenomenon blocks moisture transport from the adjacent ocean entering the region resulting in amplification of hotness due to moisture blocking, leading to an increased temperature anomaly.

由于极端温度升高，气候变化对人类健康产生不利影响。在印度无疑是正确的，最近几十年来，印度发生极端事件的频率和强度都有所上升。本研究主要侧重于了解印度均质地区炎热季节的动态。使用规范相关分析，可以定义五个温度均匀区域。除恒河平原外，所有地区均呈现出正趋势，年际变化较小。极端温度年份的季节性复合材料表明，印度北部（NI）的高温季节主要是由于高空大气的阻塞所致。同样，在炎热年份，热浪日的每日温度异常也表现出这种区域集中在整个区域上的平稳性。已发现两个全球遥相关是NI季节性异常的原因，（i）欧洲范围内持续的低异常Granger导致整个区域异常高，（ii）亚热带急流和极地急流有助于保持反气旋的平稳性该地区的街区。由于NI上方较高的大气层而下沉的空气会导致地表附近的绝热变暖。印度南部主要由于西北地区的热空气入侵而变热，导致南部沿海地区的湿度异常偏低。这种现象阻碍了水分从相邻海洋进入该区域的运输，由于水分阻塞而导致了热度的升高，从而导致温度异常增加。（i）欧洲持续不断的低异常Granger引起整个区域异常高；（ii）亚热带急流和极地急流有助于维持该地区反气旋区块的平稳性。由于NI上方较高的大气层而下沉的空气会导致地表附近的绝热变暖。印度南部主要由于西北地区的热空气入侵而变热，导致南部沿海地区的湿度异常偏低。这种现象阻止了水分从相邻海洋进入该区域的运输，由于水分的阻塞而导致了热度的升高，从而导致温度异常增加。（i）欧洲持续不断的低异常Granger引起整个区域异常高；（ii）亚热带急流和极地急流有助于维持该地区反气旋区块的平稳性。由于NI上方较高的大气层而下沉的空气会导致地表附近的绝热变暖。印度南部主要由于西北地区的热空气入侵而变热，导致南部沿海地区的湿度异常偏低。这种现象阻碍了水分从相邻海洋进入该区域的运输，由于水分阻塞而导致了热度的升高，从而导致温度异常增加。由于NI上方较高的大气层而下沉的空气会导致地表附近的绝热变暖。印度南部主要由于西北地区的热空气入侵而变热，导致南部沿海地区的湿度异常偏低。这种现象阻碍了水分从相邻海洋进入该区域的运输，由于水分阻塞而导致了热度的升高，从而导致温度异常增加。由于NI上方较高的大气层而下沉的空气会导致地表附近的绝热变暖。印度南部主要由于西北地区的热空气入侵而变热，导致南部沿海地区的湿度异常偏低。这种现象阻碍了水分从相邻海洋进入该区域的运输，由于水分阻塞而导致了热度的升高，从而导致温度异常增加。