El Nino spells trouble for kharif harvests across India
A study by scientists at an ICAR institute has found that El Niño events have consistently reduced yields of major kharif crops in India, with significant impacts across multiple states. Research led by Subash N Pillai at the ICAR-Indian Institute of Farming Systems Research shows that paddy output fell by over 10% in 77 districts, while maize production declined similarly in 65 districts during El Niño years.
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Context
A 2023 study published in Climate Services emphasizes the detrimental impact of El Niño on India's Kharif crop harvests, specifically highlighting significant yield reductions in key crops like rice, sorghum, and pearl millet. Analyzing historical El Niño years (2002, 2004, 2009), the research underscores the urgent need for climate-resilient agricultural strategies at the district level to mitigate the effects of the anticipated El Niño phenomenon. These findings are crucial for policymakers preparing contingency plans to safeguard food security and farmer livelihoods.
UPSC Perspectives
Geographical
Understanding the geographical mechanics of El Niño is fundamental for UPSC. It refers to the abnormal warming of sea surface temperatures (SSTs) in the central and eastern tropical Pacific Ocean. This warming disrupts the Walker Circulation (a vital atmospheric circulation cell over the tropical Pacific), leading to a high-pressure zone over the western Pacific and the , and a low-pressure zone over the eastern Pacific. This reversal of the typical pressure gradient weakens the trade winds, which are crucial for drawing moisture-laden winds towards the Indian subcontinent. Consequently, this leads to a weaker or delayed Southwest Monsoon, causing significant rainfall deficits across India, particularly during the crucial Kharif sowing season. The study highlights the 'spatial and temporal variability' this creates, meaning rainfall becomes unpredictable in terms of both location and timing, directly affecting regions dependent on consistent monsoon rains.
Economic
The economic implications of an El Niño year are severe for India, primarily due to its impact on Agriculture & Food Security. A weakened monsoon directly translates to reduced yields in major Kharif crops (sown during the monsoon), such as rice, maize, pearl millet, and sorghum. The study notes yield declines of over 10% in highly vulnerable districts. This reduction in agricultural output creates a cascading effect: it lowers farm incomes, increasing the risk of agrarian distress and indebtedness. From a macro-economic perspective, lower agricultural production can trigger food inflation (a rise in the prices of food commodities), impacting household budgets and potentially prompting government interventions like export bans or the release of buffer stocks by the to stabilize domestic prices. This scenario highlights the structural vulnerability of India's economy to climate variations, given that a significant portion of its workforce remains dependent on agriculture.
Governance
The study's findings directly inform Governance strategies, emphasizing the need for proactive Disaster Management and climate adaptation. It advocates for decentralized, district-level climate-resilient agricultural planning. This involves transitioning from reactive crisis management to proactive risk mitigation. Key governance interventions include promoting drought-tolerant crop varieties (like specific strains of millets which require less water) and enhancing efficient water management (such as micro-irrigation promoted under the ). Furthermore, expanding weather-based agro-advisory services is crucial; these services provide farmers with timely, localized weather forecasts and farming advice, enabling them to make informed decisions about sowing and irrigation. The plays a pivotal role in developing these strategies and crop varieties, highlighting the intersection of scientific research and public policy in ensuring agricultural sustainability in the face of climate change.