Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-19-0139.1 |
Surface Fluxes Modulate the Seasonality of Zonal-Mean Storm Tracks | |
Barpanda, Pragallva; Shaw, Tiffany A. | |
2020-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2020 |
卷号 | 77期号:2页码:753-779 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The observed zonal-mean extratropical storm tracks exhibit distinct hemispheric seasonality. Previously, the moist static energy (MSE) framework was used diagnostically to show that shortwave absorption (insolation) dominates seasonality but surface heat fluxes damp seasonality in the Southern Hemisphere (SH) and amplify it in the Northern Hemisphere (NH). Here we establish the causal role of surface fluxes (ocean energy storage) by varying the mixed layer depth d in zonally symmetric 1) slab-ocean aquaplanet simulations with zero ocean energy transport and 2) energy balance model (EBM) simulations. Using a scaling analysis we define a critical mixed layer depth d(c) and hypothesize 1) large mixed layer depths (d > d(c)) produce surface heat fluxes that are out of phase with shortwave absorption resulting in small storm track seasonality and 2) small mixed layer depths (d < d(c)) produce surface heat fluxes that are in phase with shortwave absorption resulting in large storm track seasonality. The aquaplanet simulations confirm the large mixed layer depth hypothesis and yield a useful idealization of the SH storm track. However, the small mixed layer depth hypothesis fails to account for the large contribution of the Ferrel cell and atmospheric storage. The small mixed layer limit does not yield a useful idealization of the NH storm track because the seasonality of the Ferrel cell contribution is opposite to the stationary eddy contribution in the NH. Varying the mixed layer depth in an EBM qualitatively supports the aquaplanet results. |
英文关键词 | Atmospheric circulation Energy transport Storm tracks Energy budget balance Seasonal cycle |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000515827800002 |
WOS关键词 | MEDIATED REGIME TRANSITIONS ; GENERAL-CIRCULATION ; HADLEY CIRCULATION ; CLIMATE ; ENERGY ; MODEL ; PARAMETERIZATION ; ATMOSPHERES ; MECHANISMS ; CYCLE |
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/280286 |
专题 | 地球科学 |
作者单位 | Univ Chicago, Dept Geophys Sci, 5734 S Ellis Ave, Chicago, IL 60637 USA |
推荐引用方式 GB/T 7714 | Barpanda, Pragallva,Shaw, Tiffany A.. Surface Fluxes Modulate the Seasonality of Zonal-Mean Storm Tracks[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2020,77(2):753-779. |
APA | Barpanda, Pragallva,&Shaw, Tiffany A..(2020).Surface Fluxes Modulate the Seasonality of Zonal-Mean Storm Tracks.JOURNAL OF THE ATMOSPHERIC SCIENCES,77(2),753-779. |
MLA | Barpanda, Pragallva,et al."Surface Fluxes Modulate the Seasonality of Zonal-Mean Storm Tracks".JOURNAL OF THE ATMOSPHERIC SCIENCES 77.2(2020):753-779. |
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