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July 30, 2026Discover AtmosphereOpen Access

Comparative analysis of spatio-temporal rainfall patterns in the agro-climatic zones of India

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Authors

SSSonam SahRSRN SinghBDBappa Das

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Overview

Analysis of rainfall trends in Indian agro-climatic zones reveals significant declines, suggesting implications for agriculture.

Key Points

  • This analysis aims to assess long-term changes in rainfall patterns across different agro-climatic zones in India.
  • Analyzed gridded rainfall data from 1901 to 2022 across various agro-climatic zones.
  • Employed classical statistical methods including Mann–Kendall test and Sen’s slope estimator.
  • Utilized Innovative Trend Analysis (ITA) and Innovative Polygon Trend Analysis (IPTA) for graphical trend assessments.
  • Winter rainfall shows decreasing trends in most agro-climatic zones, except for WHR where an increase was detected.
  • Significant declines in monsoon, post-monsoon, and annual rainfall observed in northern, central, and eastern regions.
  • IPTA detected trends in 72% of monthly rainfall time-series, demonstrating its effectiveness over classical methods.

Cite This Study

Sah et al. (2026) studied this question.

synapsesocial.com/papers/6a6af59760e2b924d3ea2380https://doi.org/10.1007/s44292-026-00087-5
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