Interdecadal Changes in the Freeze Depth and Period of Frozen Soil on the Three Rivers Source Region in China from 1960 to 2014

Figure 3

Freeze depth anomaly series during 1960–2014. Linear least squares regression lines are included for 1960–2014 (red line), 1985–2014 (blue line), and 2000–2014 (green line). (a) Xinghai station, (b) Tongde station, (c) Zeku station, (d) Zaduo station, (e) Yushu station, (f) Guoluo station, (g) Dari station, (h) Henan station, (i) Ruoergai station, (j) Nangqian station, (k) Changdu station, (l) Zhiduo station, (m) Qumalai station, (n) Maduo station, and (o) average.

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