Question Q.13GS1GS1

Give a reasoned account of the distribution of deserts across the earth with the help of relevant examples.

Introduction

Deserts are marked by negative soil moisture balance, extreme diurnal and annual temperature changes and strong anti-cyclonic conditions, leading to conditional stability.

22 words

Main Body

Distribution of deserts:

(A) Sub-tropical belt:

1. Found between 25°-30°N/S of the equator

2Sub-tropical high pressure belt along the horse latitudes, in the western part of the continents:

3. Presence of sub-tropical westerly jet stream => upper air pilations which leads to the sinking of high pressure air => creation of high pressure air raises calm clouds

4. Sinking air raises calm clouds => greater insolation and leads precipitation => desert like conditions.

5. Formation of the Kough of jet cream => anticyclonic conditions.

[Eg.] Thar desert (Rajasthan), Arabian desert (Saudi Arabia), Sahara desert (Africa) etc.

(B) Mid-latitude deserts => 60-65°N/S

7Cold deserts => with temperature below 5°C during the night

113 words4 paragraphs

Diagram

Map showing distribution of deserts across the world with latitudes marked (60°N, 30°N, 0°, 30°S, 60°S) and desert regions shaded (Mongolian, Arabian, Sahara, Patagonia, Atacama, Kalahari, Australian deserts labeled). Text labels include 'Tropic of Cancer', 'Equator', 'Tropic of Capricorn'.

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Topper

Ritika Chitlangia

AIR 55

Subject & Paper

GS1GS1

Topic

Salient features of World's Physical Geography

Important Geophysical Phenomena

Desert Distribution and Formation

Writing Stats

135

Total words

Paragraphs

Technical and analytical

Tone