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Desertification of asian grasslands

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Added: 02.07.2019
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Hazards 32 , 89— Each year new deserts consume an area the size of Belgium 15 million acres or 6 million ha , most of which is in the African Sahel. Online at [1] Holtz, Uwe If you previously purchased this article, Log in to Readcube.

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Future climate impact on the desertification in the dry land asia using AVHRR GIMMS NDVI3g data

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Desertification | bfsf.info

Barrow CDS. February 21, Warren, eds. In northwestern China, desertification is a major ecological problem that has increasingly limited development of the local economy The perennial grasses and shrubs that dominate arid-land vegetation provide good forage for cattle, but overstocking leads to overgrazing and degradation of the natural vegetation cover, which, in turn, contributes to erosion and desertification.
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Exacerbated grassland degradation and desertification in Central Asia during 2000-2014.

The result was a unified NDVI time series from to We found persistent droughts were the main factor for grassland degradation and desertification in Central Asia. Groundwater depletion by over-pumping of the sandstone Ogalalla aquifer in the Southwestern United States has contributed to desertification in Nebraska , Kansas , Oklahoma and Texas. This is possible because their population growth is low, their agricultural production per acre is high, and their need for fuelwood for cooking and heating is optional, since fossil fuels and electricity are widely available. The United Nations defines desertification as the persistent degradation of land in arid, semi-arid, and dry sub-humid areas, all of which have limited water supplies.
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Sometimes desertification is the result of purely natural processes. The panel data model is:. Therefore, ecosystem and agricultural degradation caused by desertification must be confronted from scientific, social and economic angles. A widely used definition for desertification is land degradation in arid, semiarid, and dry subhumid regions due to human activities and climate variations, which may lead to the permanent loss of land productivity. Therefore, analyzing the temporal dynamics and spatial patterns of surface freeze-thaw cycles and vegetation green-up date to determine and predict their response to global climate change is important.
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