Chapter 04 of 5
The Dry Valleys: Earth's Mars
A journey to the McMurdo Dry Valleys, a snowless desert.
- Geographic Anomaly
The Land Without Snow
Despite being in the heart of frozen Antarctica, the McMurdo Dry Valleys are largely devoid of snow and ice. This 4,800-square-kilometer region is the largest ice-free area on the continent.
- Mechanism
The Rain Shadow Effect
The Transantarctic Mountains act as a massive barrier, blocking moisture-laden clouds from the Southern Ocean. This creates a hyper-arid polar desert where precipitation is virtually non-existent.
- Atmospheric Force
Katabatic Winds
Gravity pulls cold, dense air down from the high Antarctic Plateau at speeds exceeding 320 km/h. These fierce winds evaporate all moisture and scour the landscape clean.
17 more cards in this chapter
Could you answer this?
What is the primary cause of the extreme lack of snow and ice in the Dry Valleys?
❄️ McMurdo Station: The Antarctic Metropole
- 01The Volcanic AnchorThe strange geography of Ross Island and its frozen bridge.
- 02Logistics of the VoidLanding planes on ice and the engineering of the Ice Pier.
- 03The Long Night: Winter-OverLife at the edge of the world during total solar absence.
- 04The Dry Valleys: Earth's MarsA journey to the McMurdo Dry Valleys, a snowless desert.
- 05A Continent Without BordersThe Antarctic Treaty and the geography of scientific sovereignty.