Climate Change Data Portal
| DOI | 10.1175/JCLI-D-19-0638.1 |
| Arctic lower-tropospheric warm and cold extremes: Horizontal and vertical transport; diabatic processes; and linkage to synoptic circulation features | |
| Papritz L. | |
| 发表日期 | 2020 |
| ISSN | 0894-8755 |
| 起始页码 | 993 |
| 结束页码 | 1016 |
| 卷号 | 33期号:3 |
| 英文摘要 | The thermodynamic processes and synoptic circulation features driving lower-tropospheric temperature extremes in the high Arctic (.808N) are investigated. Based on 10-day kinematic backward trajectories from the 5% most intense potential temperature anomalies, the contributions of horizontal and vertical transport, subsidence-induced warming, and diabatic processes to the generation of the Arctic temperature anomaly are quantified. Cold extremes are mainly the result of sustained radiative cooling due to a sheltering of the Arctic from meridional airmass exchanges. This is linked to a strengthening of the tropospheric polar vortex, a reduced frequency of high-latitude blocking, and in winter also a southward shift of the North Atlantic storm track. The temperature anomaly of 60% of wintertime extremely warm air masses (90% in summer) is due to transport from a potentially warmer region. Subsidence from the Arctic midtroposphere in blocking anticyclones is the most important warming process with the largest contribution in summer (70% of extremely warm air masses). In both seasons, poleward transport of already warm air masses contributes around 20% and is favored by a poleward shift of the North Atlantic storm track. Finally, about 40% of the air masses in winter are of an Arctic origin and experience diabatic heating by surface heat fluxes in marine cold air outbreaks. Our study emphasizes the importance of processes in the Arctic and the relevance of anomalous blocking-in winter in the Barents, Kara, and Laptev Seas and in summer in the high Arctic-for the formation of warm extremes. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). |
| 英文关键词 | Atmospheric pressure; Heat flux; Radiative Cooling; Storms; Subsidence; Troposphere; Backward trajectory; Potential temperature; Surface heat fluxes; Synoptic circulations; Temperature anomaly; Thermodynamic process; Tropospheric temperature; Vertical transports; Temperature; atmospheric circulation; climate; diabatic process; extreme event; seasonal variation; synoptic meteorology; temperature anomaly; thermodynamics; troposphere; Arctic Ocean; Barents Sea; Kara Sea; Laptev Sea |
| 语种 | 英语 |
| 来源期刊 | Journal of Climate
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/171459 |
| 作者单位 | Institute for Atmospheric and Climate Science, ETH Zürich, Zurich, Switzerland |
| 推荐引用方式 GB/T 7714 | Papritz L.. Arctic lower-tropospheric warm and cold extremes: Horizontal and vertical transport; diabatic processes; and linkage to synoptic circulation features[J],2020,33(3). |
| APA | Papritz L..(2020).Arctic lower-tropospheric warm and cold extremes: Horizontal and vertical transport; diabatic processes; and linkage to synoptic circulation features.Journal of Climate,33(3). |
| MLA | Papritz L.."Arctic lower-tropospheric warm and cold extremes: Horizontal and vertical transport; diabatic processes; and linkage to synoptic circulation features".Journal of Climate 33.3(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Papritz L.]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Papritz L.]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Papritz L.]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
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。
