Tamil Nadu among pronounced drought hotspots as South Peninsular India sees strongest drought trend: study
While less than 10% of the region was affected by drought in much of the period before the 1990s, several years after 2000 saw more than 40% of the region under drought conditions
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Context
A recent 52-year analysis published in the International Journal of Climatology reveals that South Peninsular India, particularly Tamil Nadu, has experienced the strongest long-term increase in drought-affected areas in the country. The study, which utilized a revised , highlights a significant rise in both drought conditions and heat stress over the past decades, driven by increasing temperatures and changing rainfall patterns.
UPSC Perspectives
Environmental
The study highlights the escalating impacts of climate change on the Indian subcontinent, specifically focusing on the increasing frequency and intensity of extreme weather events. The researchers utilized the (SPEI) to measure drought. This is crucial for UPSC aspirants to note, as SPEI is a more comprehensive metric than those based solely on precipitation; it factors in potential evapotranspiration, thereby accurately reflecting the influence of rising global temperatures on water availability. The findings indicate a significant shift in drought patterns, with the affected area in South Peninsular India increasing from less than 10% pre-1990s to over 40% post-2000. This data underscores the critical need for robust climate adaptation strategies, as the warming trend exacerbates water scarcity and heat stress, leading to long-term ecological consequences.
Geographical
From a geographical perspective, the study provides vital insights into the spatial distribution of climate vulnerabilities across India's climatic regions. The pronounced drought hotspot in South Peninsular India, particularly along the eastern coastal states like Tamil Nadu, Andhra Pradesh, and Odisha, is a significant departure from historical norms. The intensification of heat stress in this region is attributed to a combination of rising minimum temperatures, high humidity due to proximity to the Bay of Bengal, and urbanization, which creates urban heat-island effects (localized areas with significantly higher temperatures than surrounding rural areas). Aspirants should focus on how geographic factors, such as coastal proximity and urbanization, interact with broader climate trends to amplify local vulnerabilities, as this is a common theme in GS Paper 1.
Governance
The findings call for an urgent paradigm shift in disaster management and governance, emphasizing the need for region-specific and cross-sectoral adaptation strategies. The traditional reactive approach to drought management must evolve into proactive resilience building, encompassing agriculture, water resource management, health, and infrastructure development. The (IMD) datasets were instrumental in this study, highlighting the importance of finer-scale monitoring and data-driven policymaking. For UPSC preparation, this emphasizes the role of institutions like the in generating actionable climate intelligence. Governance frameworks must integrate these scientific findings to formulate localized interventions, as broad, generic policies may be ineffective against the nuanced, varied impacts of climate change across different regions.