当前位置: X-MOL 学术Nat. Clim. Change › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Dust dominates high-altitude snow darkening and melt over high-mountain Asia
Nature Climate Change ( IF 30.7 ) Pub Date : 2020-10-05 , DOI: 10.1038/s41558-020-00909-3
Chandan Sarangi , Yun Qian , Karl Rittger , L. Ruby Leung , Duli Chand , Kat J. Bormann , Thomas H. Painter

Westerly driven, long-range transportation of dust particles in elevated aerosol layers (EALs) is a persistent phenomenon during spring and summer over the Indian subcontinent. During the snow accumulation season, EALs transport substantial amounts of dust to the snow-covered slopes of high-mountain Asia (HMA). Here we use multiple satellite-based estimates to demonstrate a robust physical association between the EALs and dust-induced snow darkening over HMA. Results from a fully coupled atmosphere–chemistry–snow model support these observations, revealing across HMA a signature of increasing dust-induced snow darkening with surface elevation that peaks near 4,500 m. Moreover, the influence of dust on snow darkening is greater than that of black carbon above 4,000 m. Our findings suggest a discernible role of dust in the observed spatial heterogeneity of snowmelt and snowline trends over HMA and highlight an increasing contribution of dust to snowmelt as the snowline rises with warming.



中文翻译:

尘土占主导地位的高空积雪在亚洲高山区融化

在春季和夏季,在印度次大陆上,向西驱动的高浓度气溶胶层(EAL)中的尘埃颗粒的远程运输是一种持续现象。在积雪季节,EAL将大量灰尘运送到亚洲高山(HMA)积雪覆盖的山坡上。在这里,我们使用多个基于卫星的估计值来证明EAL与HMA上的粉尘引起的雪变黑之间存在稳健的物理联系。大气-化学-雪完全耦合模型的结果支持了这些观察结果,在HMA上揭示了由尘埃引起的雪变暗的迹象,其表面海拔最高达到4,500 m。此外,粉尘对雪黑的影响大于4,000 m以上的黑碳。

更新日期:2020-10-05
down
wechat
bug