Seasonal (June-to-September) and inter-annual variations of total lake surface areas (km²) detected based on MODIS minimum composite NDVI from 2000 to 2011.

<p>(a) monthly lake surface area, (b) annual maximum (closed circle), minimum (open circle), and mean (triangle) lake areas with annual range (vertical bar) of seasonal lake area change. Lake areas are shown only for June to September. Closed circle in (a) indicate the lake area in June of each year.