基于SNICAR模型研究黑碳对冰川反照率的影响

Study on the Effect of Black Carbon on Glacier Albedo Based on Snipar Model

冰川反照率是控制冰雪消融速度的决定因素,而黑碳是冰川反照率的重要影响因子。基于MODIS数据反演了祁连山老虎沟12号冰川2001年-2019年的冰川反照率,分析反照率的变化趋势,并利用SNICAR模型定量分析黑碳对反照率的影响。该地区逐年平均反照率和夏季平均反照率在时间上呈现出上升趋势,且表现了明显的季节相关性,其中夏季平均值的上升趋势较之更为明显;雪冰中黑碳的存在会使反照率降低,黑碳对反照率降低的贡献度与海拔呈负相关,且受季节影响程度较大。

Glacier albedo is the decisive factor to control the melting rate of ice and snow,and black carbon is an important factor to influence glacier albedo.Based on MODIS data,the glacier albedo of Laohugou No.12 glacier in Qilian mountain from2001 to 2019 was inversed,and the variation trend of albedo was analyzed.The influence of black carbon on albedo was quantitatively analyzed by using snicar model.The annual average albedo and summer average albedo in the region showed an upward trend in time,and showed obvious seasonal correlation,especially in summer.The contribution of black carbon to albedo reduction is negatively correlated with altitude,and is greatly affected by seasons.