Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0353.1 |
Midwinter Suppression of Storm Tracks in an Idealized Zonally Symmetric Setting | |
Novak, Lenka1; Schneider, Tapio1; Ait-Chaalal, Farid2 | |
2020 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:1页码:297-313 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | The midwinter suppression of eddy activity in the North Pacific storm track is a phenomenon that has resisted reproduction in idealized models that are initialized independently of the observed atmosphere. Attempts at explaining it have often focused on local mechanisms that depend on zonal asymmetries, such as effects of topography on the mean flow and eddies. Here an idealized aquaplanet GCM is used to demonstrate that a midwinter suppression can also occur in the activity of a statistically zonally symmetric storm track. For a midwinter suppression to occur, it is necessary that parameters, such as the thermal inertia of the upper ocean and the strength of tropical ocean energy transport, are chosen suitably to produce a pronounced seasonal cycle of the subtropical jet characteristics. If the subtropical jet is sufficiently strong and located close to the midlatitude storm track during midwinter, it dominates the upper-level flow and guides eddies equatorward, away from the low-level area of eddy generation. This inhibits the baroclinic interaction between upper and lower levels within the storm track and weakens eddy activity. However, as the subtropical jet continues to move poleward during late winter in the idealized GCM (and unlike what is observed), eddy activity picks up again, showing that the properties of the subtropical jet that give rise to the midwinter suppression are subtle. The idealized GCM simulations provide a framework within which possible mechanisms giving rise to a midwinter suppression of storm tracks can be investigated systematically. |
英文关键词 | Baroclinic flows Eddies Large-scale motions Kinetic energy Storm environments General circulation models |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000504095000001 |
WOS关键词 | CENTRAL-ASIAN MOUNTAINS ; GENERAL-CIRCULATION ; HADLEY CIRCULATION ; SCALE DISTURBANCES ; REGIME TRANSITIONS ; CLIMATE-CHANGE ; ENERGY ; DYNAMICS ; WINTER ; MODEL |
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/280260 |
专题 | 地球科学 |
作者单位 | 1.CALTECH, Pasadena, CA 91125 USA; 2.Risk Management Solut, London, England |
推荐引用方式 GB/T 7714 | Novak, Lenka,Schneider, Tapio,Ait-Chaalal, Farid. Midwinter Suppression of Storm Tracks in an Idealized Zonally Symmetric Setting[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(1):297-313. |
APA | Novak, Lenka,Schneider, Tapio,&Ait-Chaalal, Farid.(2020).Midwinter Suppression of Storm Tracks in an Idealized Zonally Symmetric Setting.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(1),297-313. |
MLA | Novak, Lenka,et al."Midwinter Suppression of Storm Tracks in an Idealized Zonally Symmetric Setting".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.1(2020):297-313. |
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