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1961—2019年三江源地区季节冻土冻融状态时空变化及影响因素研究
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Study on spatiotemporal changes of the freeze-thaw status of seasonally frozen ground and influencing factors in the Three Rivers Source Region from 1961 to 2019
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图8. 1961—2019年三江源地区冻结指数(a)、冻结指数变化率(b)、融化指数(c)、融化指数变化率(d)空间分布[图(a)、(c)中蓝点大小表示冻结、融化指数大小,图(b)、(d)中红点表示冻结、融化指数增大,蓝点表示减小,五角星表示未通过P<0.05的显著性检验] |
Fig. 8. The long-term average and trend spatial distribution of freezing and thawing index in the Three Rivers Source Region from 1961 to 2019: the long-term average of freezing index (blue circles) (a), the long-term trend of freezing index (blue circles reflect it is decreasing, red circles reflect it is increasing) (b), the long-term average of thawing index (blue circles) (c), the long-term trend of thawing index (blue circles reflect it is decreasing, red circles reflect it is increasing) (d), and five-pointed star indicate no significant change (P<0.05) |
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