Sensitivity of the North American monsoon to antecedent Rocky Mountain snowpack

摘要: [1] While the inverse relationship between antecedent snowpack in Himalayas and Tibetan Plateau subsequent monsoon rainfall South East Asia has been extensively studied established, potential for such a Rocky Mountain North American remains uncertain. The present study represents first modeling assessment of this vital predictability issue, going beyond simple observational correlations, which fail to identify causality or mechanism, by applying regional climate model demonstrate that deep tends hinder poleward advance subtropical ridge associated into Southwest United States. A deep, extensive increases surface albedo provides an abundant surge soil moisture, both reduce tropospheric temperatures spring early summer, weakening land-ocean thermal gradient related system. This snow-monsoon relationship, may serve as prediction tool summer semi-arid States, direct implications water supply, streamflow, biodiversity.