Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1007/s00382-016-3212-6 |
Tropospheric circulation during the early twentieth century Arctic warming | |
Wegmann, Martin1,2; Bronnimann, Stefan1,2; Compo, Gilbert P.3,4 | |
2017-04-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | Switzerland; USA |
英文摘要 | The early twentieth century Arctic warming (ETCAW) between 1920 and 1940 is an exceptional feature of climate variability in the last century. Its warming rate was only recently matched by recent warming in the region. Unlike recent warming largely attributable to anthropogenic radiative forcing, atmospheric warming during the ETCAW was strongest in the mid-troposphere and is believed to be triggered by an exceptional case of natural climate variability. Nevertheless, ultimate mechanisms and causes for the ETCAW are still under discussion. Here we use state of the art multi-member global circulation models, reanalysis and reconstruction datasets to investigate the internal atmospheric dynamics of the ETCAW. We investigate the role of boreal winter mid-tropospheric heat transport and circulation in providing the energy for the large scale warming. Analyzing sensible heat flux components and regional differences, climate models are not able to reproduce the heat flux evolution found in reanalysis and reconstruction datasets. These datasets show an increase of stationary eddy heat flux and a decrease of transient eddy heat flux during the ETCAW. Moreover, tropospheric circulation analysis reveals the important role of both the Atlantic and the Pacific sectors in the convergence of southerly air masses into the Arctic during the warming event. Subsequently, it is suggested that the internal dynamics of the atmosphere played a major role in the formation in the ETCAW. |
英文关键词 | Arctic climate Arctic warming Circulation Reanalysis Reconstructions Troposphere Climate change Heat flux |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398926400018 |
WOS关键词 | TEMPERATURE VARIABILITY ; VERTICAL STRUCTURE ; AIR-TEMPERATURE ; CLIMATE ; TRENDS ; PRECIPITATION ; AMPLIFICATION ; SIMULATION ; PRESSURE ; SUMMER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/35679 |
专题 | 气候变化 |
作者单位 | 1.Univ Bern, Oeschger Ctr Climate Change Res, Bern, Switzerland; 2.Univ Bern, Inst Geog, Hallerstr 12, CH-3012 Bern, Switzerland; 3.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 4.NOAA Earth Syst Res Lab, Phys Sci Div, R PSD1 325 Broadway, Boulder, CO 80305 USA |
推荐引用方式 GB/T 7714 | Wegmann, Martin,Bronnimann, Stefan,Compo, Gilbert P.. Tropospheric circulation during the early twentieth century Arctic warming[J]. CLIMATE DYNAMICS,2017,48. |
APA | Wegmann, Martin,Bronnimann, Stefan,&Compo, Gilbert P..(2017).Tropospheric circulation during the early twentieth century Arctic warming.CLIMATE DYNAMICS,48. |
MLA | Wegmann, Martin,et al."Tropospheric circulation during the early twentieth century Arctic warming".CLIMATE DYNAMICS 48(2017). |
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