HL

Harsh LodhaAIR 261· 2023

Question Q.14GS3GS1

Enumerate the reasons behind rising intensity and frequency of cyclones in the Arabian Sea in recent years. Giving special reference to NDMA guidelines, recommend measures to check adverse impacts of cyclones.

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AnswerStrengthsGapsKeywords

Main Body

As per recent NDMA data, very severe cyclones in Arabian sea rose from 5 in last 15 years (2018) and 4 in 2019.

Reasons behind increasing intensity and frequency in Arabian sea:

1Increasing sea surface temperature due to global warming. (2-5° for cyclone achieved).
2Due to triple dip La-Nina increased monsoon and thus freshwater wet and salinity reduced. (Bay of Bengal like condition)
3Low pressure formed over Arabian
4Increased intensity seen in Tankhe Kyar, Shaheen due to strong cyclonic formation conditions.
5Weakening of AMOC and increased wind convergence in Arabian sea.

Measures to check adverse impact:

(A) Risk and Vulnerability assessment

1Hazard zonation mapping
2Natural early warning system (LNCOKE)
3Coastal zone regulations

(B) Structural mitigation measures

1sea walls, levees, bunds, etc.
2Bio-shield like corals, mangroves, etc.
3Zero casualty Operation of Dashas can be replicated.

(C) Post-disaster mitigation

1Notch dsolls for rehabilitation on 2 dals settled in 2 days in Aleppo.
2Infrastructural gaps filled using NDMA, SDNA, DDMS, NDRF, etc.
3Recent Nursing of PRF, disaster reduction plan by village level disaster management plan.

sea by upward ITCZ movement along with local disturbances in form of Monsoon and somali jet stream.

4Increased intensity seen in Tausike Kyar, Shaheen due to strong cyclonic formation conditions.
5Weakening of AMOC and increased wind convergence in Arabian sea.

Measures to check adverse impact:

(A) Risk and Vulnerability assessment

1Hazard zonation mapping
2Natural early warning system (LNCOKE)
3Coastal zone regulations

(B) Structural mitigation measures

1sea walls, levees, bunds, etc.
2Bio-shield like corals, mangroves, etc.
3Zero casualty Operation of Dashas can be replicated.

(C) Post-disaster mitigation

1Notch dsolls for rehabilitation on 2 dals settled in 2 days in Aleppo.
2Infrastructural gaps filled using NDMA, SDNA, DDMS, NDRF, etc.
3Recent Nursing of PRF, disaster reduction plan by village level disaster management plan.
318 words4 paragraphs

Conclusion

Simultaneous cyclones in the Arabian sea can impact the large local population there and thus need to ensure that mitigation & disaster reduction measures in place.

26 words

  • Clear quantification of data on cyclone frequency
  • Links climate change to specific atmospheric mechanisms
  • Comprehensive mitigation framework based on NDMA guidelines
  • Includes structural and non-structural measures
  • References specific cyclones (Tankhe Kyar, Shaheen)

Open original scan

Page 31

Topper

Harsh Lodha

AIR 2612023

Subject & Paper

GS3GS1

Topic

Important Geophysical Phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.

Cyclones

Arabian Sea cyclones and climate change

Writing Stats

344

Total words

4

Paragraphs

technical and structured

Tone