Long Period Average and Monsoon Risk Assessment

Paper: GS – I, Subject: Geography, Topic: Indian Climate & Vegetation, Issue: Indian Monsoon.

Context:

IMD Flags El Niño Risk for 2026 Indian Monsoon Season, Expects Around 92–93% Rainfall. India may experience a below-normal monsoon due to emerging El Niño conditions, raising concerns for agriculture, water resources and economic stability.

Key Takeaways:

UNDERSTANDING THE INDIAN MONSOON SYSTEM:

Indian Monsoon
Long Period Average (LPA)
Climate Drivers of Monsoon Variability

ANALYSIS OF CURRENT MONSOON OUTLOOK:

  • IMD has forecast rainfall around 92–93% of LPA, placing it in the below-normal category.
  • Past instances, such as 2015, show that actual rainfall may fall below initial forecasts.
  • The second half of the monsoon, particularly August and September, is expected to be more affected.
  • A possible positive IOD may moderate the impact, but uncertainties remain due to complex climate interactions.
Impacts of a weak Monsoon

Additional Risk Factors:

  • Geopolitical tensions in West Asia may disrupt fertilizer supply chains.
  • Rising input costs can worsen farmer sentiment during weak rainfall years.
  • Combined climatic and economic stress can amplify rural vulnerability.

POLICY RESPONSE AND WAY FORWARD:

  • Build adequate fertilizer reserves and ensure timely availability
  • Improve water management and equitable distribution, especially in stressed regions
  • Strengthen reservoir planning and groundwater recharge measures
  • Provide timely advisories to farmers on cropping patterns and sowing practices
  • Promote climate-resilient agriculture and drought-resistant crop varieties

CONCLUSION:

The Indian monsoon is governed by complex ocean–atmosphere interactions, where Long Period Average (LPA) provides a benchmark for rainfall assessment, while El Niño and the Indian Ocean Dipole determine its variability. A below-normal monsoon, particularly under El Niño conditions, can trigger a multi-sectoral crisis affecting agriculture, water security, and economic stability, necessitating early preparedness, adaptive governance, and climate resilience strategies.

Source: (The Hindu)

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