RC

Ritika Chitlangia

Question 18GS1GS1

Although desert landscapes across the world reflect many similarities, the process of desertification is influenced by local factors. Elaborate with suitable examples.

Open scan (p.47)

Introduction

Desert lands capes are characterized by rainless, cloudless conditions, high insolation, high pressure and negligible water resources.

17 words

Main Body

Across the world, between 20-30° latitude, in western parts of the continents, tropical deserts are found.

(i) 20-30°Nsubtropical high pressure causes atmospheric stabilityrainless conditions.
(ii) Nearer marginscaused due to offshore trade winds.

Nevertheless, desertification also depends on several local climatic conditions.

(I) Atacama desertlocated in Peru & Chile. One of the deist place on earth. Reason for desertification being Andesacting as an orographic barrier.

Atacama falls on leeward side, also influenced by La Nina.

[Diagram: Pacific oceanAndes Atacama leeward zone]
(II) Thar desertlocated in Western Rajasthan, India. Receives less than 15 cm rainfall

because:

(I) leeward side of Aravalli mountain

(ii) seasonal branches become moisture less, once they reach western Rajasthan.

3Sahara desert → located in Africa. caused as cause of disruptive conditions caused as a result of cold upwelling zone in Benguela cold current.

[Diagram: Showing desert location]

Therefore, deserts are dynamic result of interplay of several conditions. Need to stop the expansion of deserts as a result of climate change.

177 words1 paragraphs

Conclusion

Therefore, deserts are dynamic result of interplay of several conditions. Need to stop the expansion of deserts as a result of climate change.

23 words

Diagram

Map showing desert distribution with labels: Atacama, Sonoran, Arabian, Sahara, Kalahari with latitude markers (30°N, 0°, 30°S)

  • provides latitudinal analysis of desert distribution
  • explains pressure and wind systems
  • includes relevant examples

Topper

Ritika Chitlangia

Subject & Paper

GS1GS1

Topic

Salient features of World's Physical Geography

Desert Desertification

Desert formation and distribution patterns

Writing Stats

217

Total words

1

Paragraphs

technical

Tone