积雪对祁连山区黑河上游活动层热状态的影响研究

张凤,范成彦,牟翠翠,孙文,彭小清,张廷军

Influences of snow cover on the thermal state of the active layer in the upper reaches of the Heihe River in the Qilian Mountains

Feng ZHANG,Chengyan FAN,Cuicui MU,Wen SUN,Xiaoqing PENG,Tingjun ZHANG

表3 PT1监测场2017年秋末冬初和春季过渡期积雪前后净辐射等参数的变化

Table 3 Variation of net radiation and so on before and after a snowfall during spring transitional period and from autumn to winter and in 2017 at PT1 site

阶段 净辐射/（W·m-2） 地表热通量 /（W·m-2） （Tg-Ta）/℃ 5月末降雪前 109.00 16.23 1.03 积雪覆盖期间 64.04 2.64 1.85 6月初雪消融后 139.08 23.01 2.30 秋末降雪前 62.46 -1.32 4.16 积雪覆盖期间 -4.12 -2.71 7.20 冬初雪消融后 2.85 -2.96 5.32