In Mongolia, the total lake area showed an increasing trend until 1997, and then decreased until 2020.
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Most of the lakes showed a trend of shrinkage and a consequent decrease in LWS during 1998–2010, with a greater decrease in regions A and C by 20.24 km 3 (62%), 7.38 km 3 (23%), respectively, and Region B and C decreased by 2.65 km 3 and 2.17 km 3 , respectively.
The lake area in Mongolia showed a decreasing trend since 1991, reaching a minimum and then a partial lake expansion around 2006–2009.