विभिन्न प्रकार के मरुस्थलों के निर्माण के लिए उत्तरदायी कारकों पर प्रकाश डालते हुए, उनके पार्दी जाने वाली प्रमुख भू-आकृतियों का संक्षिप्त विवरण दीजिए। (उत्तर 250 शब्दों में दीजिए) / Highlighting the factors behind the formation of different types of deserts, give a brief account of the major landforms found in them. (Answer in 250 words)
Introduction
[Handwritten diagram showing distribution of deserts]
6 words
Main Body
Desert Formation:
1. Warm winds, Mohave, Sonoran, Saharan Desert (chinookwind for eg.)
2. Continentality: Thar Desert, Kyzlkum Desert
3. Horse latitude Deserts: 30° latitude - air deserts aree, no rainfall
4. Cold ocean currents: Humboldt current, Peruvian current form Patagonian and Namibian and Kalahari Deserts
5. Extreme cold: Arctic, Antarctica and parts of Ladakh that are too cold to sustain vegetation.
major Landforms in desert:
1. Sand dunes/Barchans
↝ formed by unidirectional flow of wind.
4. sand dunes that form patterns on the surface.
Hence, Landforms are mostly temporary and form due to the winds in deserts: wind erosion and temperature differences of night and day (annual range) causes weathering of rocks to form some landforms.
Diagram
Distribution map of major deserts globally including Arctic Desert, Mohave, Sonoran, Kyzlkum, Iranian, Thar, Saharan, Atacama, Patagonian, Kalahari, Australian Desert, Antarctic Desert. Also includes a sphere diagram showing latitude lines (0°, 30°, 60°) for horse latitude desert formation.
- Comprehensive classification by formation factors
- Good use of examples for each desert type
- Clear diagram showing global desert distribution
- Identifies specific wind types and ocean currents
- Uses latitude data for horse latitude deserts
BHAVIKA CHOFRA
World's Physical Geography
Important Geophysical Phenomena
Desert Formation and Landforms
148
Total words
3
Paragraphs
Scientific and geographical
Tone