Figure 4
From: Annual variations of monsoon and drought detected by GPS: A case study in Yunnan, China

Empirical relations of the annual amplitude between GPS-derived VCD and other quantities. (a) for GRACE-derived VCD, (b) for EWH, (c) for precipitation, and (d) for PWV. The red line in (d) is the linear fitting line without two abnormal stations, Lijiang (YNLJ) and Shangri-La (YNZD).