What is El Nino? What are the causes of El Nino? Discuss the scenario of impact of El Nino on global…

Question

What is El Nino? What are the causes of El Nino? Discuss the scenario of impact of El Nino on global agriculture.

Ghissu Editorial · Accepted Answer

El Niño is a periodic warming of the central and eastern tropical Pacific, part of ENSO, caused by weakening trade winds that suppress cold upwelling and reverse the Walker circulation. It weakens India's southwest monsoon, causing droughts in India, Southeast Asia and Australia and raising global food prices.

**Introduction**

El Ni⟦4⟧⟦3⟧⟦2⟧⟦1⟧ño, a periodic warming of surface waters in the central and eastern Pacific Ocean, disrupts global weather patterns, significantly impacting agriculture and food security, especially in monsoon-dependent regions like India. Its effects on rainfall and temperature regimes create challenges for crop production and rural livelihoods worldwide.

**Understanding El Niño and Causes**

2. **Ocean-Atmosphere Dynamics**: The warming reverses the Walker circulation, weakens trade winds, and reduces moisture transport to India, leading to deficient monsoon rainfall. This effect is further modulated by climatic oscillations like the Indian Ocean Dipole, complicating El Niño’s intensity and impact.

**Impact on Global Agriculture**

1. **Crop Production Decline**: El Niño-induced droughts reduce kharif and rabi crop yields in India and Southeast Asia, causing food grain deficits and inflation; ==Andhra Pradesh’s== drought-prone Rayalaseema region exemplifies this impact.  
2. **Global Variability**: While Argentina may experience increased maize production due to favorable conditions, Australia often faces drought and crop damage, illustrating El Niño’s uneven agricultural effects worldwide.  
4. **Adaptive Measures**: Government schemes such as Soil Health Card and the National Agriculture Market (e-NAM) in ==Andhra Pradesh== promote resilient farming practices. Enhanced ecological monitoring and water conservation efforts also help mitigate adverse impacts.

**Conclusion**

El Niño’s disruption of global weather patterns poses significant challenges to agricultural productivity and food security, especially in monsoon-dependent regions like ==Andhra Pradesh==. Strengthening climate-resilient agriculture through targeted schemes and ecological monitoring aligns with SDG 2 (Zero Hunger) and SDG 13 (Climate Action), enabling sustainable development and safeguarding livelihoods amid climatic uncertainties.

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