极端天气事件-热浪发生区的转移

IF 3.5 3区 地球科学 Q2 METEOROLOGY & ATMOSPHERIC SCIENCES
Neetu Tyagi, Adarsh Dube, S. Lakshmi, Somenath Dutta, Akhil Srivastava
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引用次数: 0

摘要

根据印度气象部门(IMD)的指导方针,本研究试图检查在过去几十年的3月至6月期间,与高温有关的极端天气事件的发生区域是否有任何重大变化。我们利用MAUSAM报告确定了1991-2020年(30年)印度各地的热浪位置,并利用IMD 1°× 1°分辨率的网格数据集确定了1961-2020年(60年)期间的热浪位置。第一部分分析了由热浪和强热浪引起的极端天气事件。在每十年中,已经确定了与高致病性/高致病性相关的广泛复发区域。这一过程在十年研究中重复进行。我们观察到高闪/小闪事件发生的时空变化,在印度高闪/小闪易发区有明显的增加和减少趋势。从康坎海岸到喀拉拉邦,西部沿海地区的HW地点有所增加。此外,东北各邦在第三个十年将面临强热带气旋/强热带气旋,这与其他更凉爽的天气形成了矛盾。在第三个十年中,围绕中部地区,从印度西北部到东南部的SHW位置似乎遵循线性结构。在梅加拉亚邦、阿萨姆邦、喜马偕尔邦和北阿坎德邦等多山的邦发生的强热带气旋/强热带气旋是前所未有的灾难性情况,可能成为未来的危险趋势。这一观测证据为了解气候变化对极端高温事件的影响提供了宝贵的见解,并有助于为减缓和适应战略提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Shifting of the Zone of Occurrence of Extreme Weather Event—Heat Waves

Shifting of the Zone of Occurrence of Extreme Weather Event—Heat Waves

In this study, an attempt has been made to examine whether there has been any significant shift in the region of occurrence of extreme weather events associated with high temperature in the past decades during the months of March to June Following the India Meteorological Department (IMD) guidelines, we have identified heatwave locations all over India for the period 1991–2020 (3 decades) using the MAUSAM report and the period 1961–2020 (6 decades) using IMD gridded datasets at 1° × 1° resolution. In the first part, an analysis of extreme weather events caused by heatwaves (HW) and severe heatwaves (SHW) has been made. In each decade, a broad region of recurrence associated with HW/SHW has been identified. This process is repeated for a decadal-wise study. We observed a spatial–temporal shift in the occurrence of HW/SHW events, with a significantly increasing and decreasing trend in Indian states with HW/SHW-prone regions. The west coastal region has seen an increase in HW locations starting with the Konkan Coast up to Kerala. Also, the North-eastern states are facing HW/SHW in the third decade, which is a contradiction to otherwise cooler conditions. In the third decade, SHW locations appear as marked from northwest to southeast India around the central region, as if following a linear structure. The occurrence of HW/SHW in hilly states like Meghalaya, Assam, Himachal Pradesh, and Uttarakhand is an unprecedented and disastrous condition that can be a dangerous trend for the future. This observational evidence provides valuable insights into the impact of climate change on extreme heat events and helps inform mitigation and adaptation strategies.

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来源期刊
International Journal of Climatology
International Journal of Climatology 地学-气象与大气科学
CiteScore
7.50
自引率
7.70%
发文量
417
审稿时长
4 months
期刊介绍: The International Journal of Climatology aims to span the well established but rapidly growing field of climatology, through the publication of research papers, short communications, major reviews of progress and reviews of new books and reports in the area of climate science. The Journal’s main role is to stimulate and report research in climatology, from the expansive fields of the atmospheric, biophysical, engineering and social sciences. Coverage includes: Climate system science; Local to global scale climate observations and modelling; Seasonal to interannual climate prediction; Climatic variability and climate change; Synoptic, dynamic and urban climatology, hydroclimatology, human bioclimatology, ecoclimatology, dendroclimatology, palaeoclimatology, marine climatology and atmosphere-ocean interactions; Application of climatological knowledge to environmental assessment and management and economic production; Climate and society interactions
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