Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2021.105586 |
Eulerian and Lagrangian views of warm and moist air intrusions into summer Arctic | |
Cheng You, Michael Tjernström, Abhay Devasthale | |
2021-03-20 | |
发表期刊 | Atmospheric Research |
出版年 | 2021 |
英文摘要 | In this study, warm and moist air intrusions (WaMAI) over the sea sectors of Kara, Laptev, East Siberian and Beaufort from 1979 to 2018 are identified in ERA5 reanalysis and their air-mass transformation is analysed using interpolation in ERA5 and satellite products along trajectories. The analysis shows that WaMAIs, driven by blocking high-pressure systems over the respective ocean sectors, induce surface warming (11–18 W m−2) and sea ice melt from positive anomalies of net longwave radiation (5–8 W m−2) and turbulent flux (8–13 W m−2) to the surface, although the anomaly of net shortwave radiation (−9 ~ +1 W m−2) is negative. From a Lagrangian perspective, the surface energy-budget anomaly decreases linearly, while total column cloud liquid water (TCLW) increases linearly with the downstream distance from the sea-ice edge. However, the cloud radiative effects of both longwave and shortwave radiation reach an equilibrium as TCLW increases in a much lower rate beyond 7 degrees north of the sea ice edge. The boundary-layer energy-budget pattern can be categorized into two classes: radiation-dominated and turbulence-dominated, comprised of 26% and 62% WaMAIs respectively. Statistically, turbulence-dominated cases occur with 3 times stronger large-scale subsidence, and also feature a larger anomaly in net shortwave radiation. In radiation-dominated WaMAIs, stratocumulus develops more strongly and hence exerts larger longwave and shortwave forcing to the surface. In both categories, a well-mixed boundary layer deepens by 500 m along the trajectories, from the continuous turbulent mixing. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/319810 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Cheng You, Michael Tjernström, Abhay Devasthale. Eulerian and Lagrangian views of warm and moist air intrusions into summer Arctic[J]. Atmospheric Research,2021. |
APA | Cheng You, Michael Tjernström, Abhay Devasthale.(2021).Eulerian and Lagrangian views of warm and moist air intrusions into summer Arctic.Atmospheric Research. |
MLA | Cheng You, Michael Tjernström, Abhay Devasthale."Eulerian and Lagrangian views of warm and moist air intrusions into summer Arctic".Atmospheric Research (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论