Traditional Culture Encyclopedia - Photography major - The causes of desertification in northwest China: why desertification in northwest China?
The causes of desertification in northwest China: why desertification in northwest China?
2. Climatic factors: The updraft in the equatorial region flows to the poles at high altitude. Due to the influence of the earth's rotation bias, most of the air does not move forward near 30 north and south latitudes, but accumulates in the high altitude and cools down through radiation. The near-surface gas layer keeps high pressure all the year round, which is called "subtropical high pressure area" in meteorology. In addition to the monsoon climate zone on the east coast of Eurasia, this area has a dry climate and few clouds and rains, making it the main desert distribution area.
3. Unreasonable human production activities: population growth and economic development have brought too much pressure on the land. Over-reclamation, overgrazing, deforestation and unreasonable use of water resources have seriously degraded the land, destroyed the forest, and gradually dried up the climate, eventually forming a desert.
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