Adding under subheading Climate:

The northern and eastern boundaries between desert and grassland are constantly changing. This is mostly due to the climate conditions before the growing season, which influence the rate of evapotranspiration and subsequent plant growth. [1]

  1. ^ F. Yu, K. P. Price, J. Ellis, J. J. Feddema, P. Shi (2004). "Interannual variations of the grassland boundaries bordering the eastern edges of the Gobi Desert in central Asia". International Journal of Remote Sensing. 25: 327–346.{{cite journal}}: CS1 maint: multiple names: authors list (link)