A joint study by the India Meteorological Department (IMD) and IITM Pune using 1951–2020 data and the Köppen–Geiger climate classification revealed that Southern India has grown wetter over seven decades. The hot semi-arid zone in peninsular India nearly halved from 30% (1951–80) to 16% (1991–2020), while the tropical savannah zone expanded to cover nearly three-fourths of the peninsula.
Key Facts
Conducted by IMD and: the Indian Institute of Tropical Meteorology (IITM), Pune using 1951–2020 rainfall and temperature records under the Köppen–Geiger classification.
Peninsular India's hot semi-arid: climate zone nearly halved from 30% (1951–1980) to 16% (1991–2020).
Tropical savannah climate zone: now covers nearly three-fourths (~75%) of peninsular India (up from ~60% in the 1950s).
Conversely, the hot semi-arid: zone expanded toward eastern Uttar Pradesh, making north-west India drier and hotter.
Static GK
Köppen–Geiger Climate Classification: Divides world climates into 5 main groups (A: Tropical, B: Arid, C: Temperate, D: Continental, E: Polar).
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