What are the reasons behind the increased frequency and intensity of heat waves globally? How will it impact global food security? (Answer in 250 words)
Introduction
Heat waves refer to the rise in normal temperatures by 5-7°C
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Main Body
Heat waves refer to the rise in normal temperatures by 5-7°C (IMD). They are defined differently for plains, hills (@plains above 40°C for 7days)
Reasons behind rise in heat waves
(a) Ise in El Nino – Southern Oscillation due disturbance that raise overall temperature
(b) closed oceanic – atmospheric Circulations due to solar system relate days (@) solar cycles
(a) Rising temperature globally due to climate change caused by
(b) The increased deforestation and changed vegetation lead to increased heating of land, deforestation and desertification (eg 20% land in India – ISRO dyrades)
(c) Changed atmospheric – oceanic cycle due to kearty (@) elongate episodes; disturbance in Atlantic Meridional circulation
(d) Reduced needs of Eases due to melting of cryosphere (ICIMODVppt)
(e) Even jet streams disturbed 'causing change in polar balance (@) disturbance in polar vortex
Impact of food security
Thus there is need for global willingness through World Food programme sharing best practices to contact ASIFF for food insecurity (India's Strategic Grain Shares and emphasis on millets
- Systematic categorization of natural vs anthropogenic causes
- Specific temperature thresholds provided
- Links to global and national food security concerns
- Mentions contemporary initiatives (millets promotion)
Sanskriti Trivedy
Important Geophysical Phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.
Climate change and heat waves
Heat waves causes and impact on food security
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Total words
10
Paragraphs
analytical and systematic
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