Poleward upgliding Siberian atmospheric rivers over sea ice heat up Arctic upper air.

ABSTRACT: We carried out upper air measurements with radiosondes during the summer over the Arctic Ocean from an icebreaker moving poleward from an ice-free region, through the ice edge, and into a region of thick ice. Rapid warming of the Arctic is a significant environmental issue that occurs not only at the surface but also throughout the troposphere. In addition to the widely accepted mechanisms responsible for the increase of tropospheric warming during the summer over the Arctic, we showed a new potential contributing process to the increase, based on our direct observations and supporting numerical simulations and statistical analyses using a long-term reanalysis dataset. We refer to this new process as "Siberian Atmospheric Rivers (SARs)". Poleward upglides of SARs over cold air domes overly

SUBMITTER: Komatsu KK 

PROVIDER: S-EPMC5811560 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature