Remote sensing earth observation (EO) satellites provide significant contributions to desertification assessment and monitoring, particularly by providing the spatial information needed for regional-scale analysis of the relationships between climate change, land degradation and desertification processes.
Gobi desert is expanding at an alarming rate. The expansion is particularly rapid on the southern edge into China. Dust storms, which used to occur regularly in China, have seen a dramatic increase in occurrence in the past 20 years, mainly due to desertification, and causing further damage to China’s agriculture economy.
Desertification, land degradation and drought deprive people of food and water and force millions to leave their homes. Desertification refers to the creation of new deserts through the degradation of drylands, which cover 40% of the world’s land surface. Land degradation, caused by over-cultivation, over-grazing, deforestation and inefficient irrigation, affects roughly 20% of Earth’s drylands.
Satellite imaging technology has been recognized as playing an important role in achieving this objective by using these methods for monitoring the areas most at risk to support land and water management decisions......