Misra et al. (2026) Spatiotemporal Evolution of Temperature Extremes Across India's Agro‐Climatic Zones

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: International Journal of Climatology
• Year: 2026
• Date: 2026-10-06
• Authors: Ashutosh Kumar Misra, Sudhir Kumar Mishra, Santosha Rathod, Kripan Ghosh, Asha Latwal, M. R. Deo, K. G. Kanade
• DOI: 10.1002/joc.70621

Research Groups

• Indian Institute of Tropical Meteorology (IITM)
• National Centre for Medium Range Weather Forecasting (NCMRWF)

Short Summary

This study examines long-term changes in temperature extremes across India's 14 mainland agro-climatic zones, highlighting spatially heterogeneous warming trends. The research reveals enhanced nocturnal warming in the Gangetic and arid zones and daytime-dominant warming in coastal and southern plateau zones.

Objective

• Investigate changes in temperature extremes across India's agro-climatic zones (ACZs) during 1951–2025

Study Configuration

• Spatial Scale: 14 mainland ACZs of India, with a spatial resolution of 1° × 1° gridded daily dataset
• Temporal Scale: 75-year period from 1951 to 2025

Methodology and Data

• Models used: None mentioned in the paper
• Data sources: India Meteorological Department (IMD) 1° × 1° gridded daily dataset

Main Results

• Tropical Nights (TR20) exhibit significant increases in 10 of 12 Tier A/B zones, with a peak trend in the Western Dry Region (+3.182 days decade−1; p < 0.05)
• Warm-day frequency (TX90p) increases significantly in 9 zones, with strongest trends in the Southern Plateau, East Coast Plains, and West Coast Plains and Ghats
• Diurnal temperature range declines in 8 zones, indicating faster warming of minimum than maximum temperatures
• Seasonal thermal accumulation intensifies, with significant increases in rabi wheat GDD in the Trans-Gangetic Plain (+11.130 GDD decade−1) and kharif cotton GDD in Gujarat Plains (+21.625 GDD decade−1)

Contributions

• Provides a comprehensive ACZ-level Expert Team on Climate Change Detection and Indices (ETCCDI) characterisation of India's 75-year thermal extreme record, revealing spatially heterogeneous warming trends

Funding

• Not mentioned in the paper

Citation

@article{Misra2026Spatiotemporal,
  author = {Misra, Ashutosh Kumar and Mishra, Sudhir Kumar and Rathod, Santosha and Ghosh, Kripan and Latwal, Asha and Deo, M. R. and Kanade, K. G.},
  title = {Spatiotemporal Evolution of Temperature Extremes Across India's Agro‐Climatic Zones},
  journal = {International Journal of Climatology},
  year = {2026},
  doi = {10.1002/joc.70621},
  url = {https://doi.org/10.1002/joc.70621}
}