Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0111.1 |
Moist Formulations of the Eliassen-Palm Flux and Their Connection to the Surface Westerlies | |
Dwyer, John G.; 39;Gorman, Paul A. | |
2017-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Eliassen-Palm (EP) flux is an important diagnostic for wave propagation and wave-mean flow interaction in the atmosphere. Here, two moist formulations of the EP flux are compared with the traditional dry EP flux, and their links to the surface westerlies are analyzed using reanalysis data and simulations with GCMs. The first moist formulation of the EP flux modifies only the static stability to account for latent heat release by eddies, while the second moist formulation simply replaces all potential temperatures with equivalent potential temperatures. For reanalysis data, the peak upward EP flux in the lower troposphere is farther equatorward and stronger when the moist formulations are used, with greater changes for the second moist formulation. The moist formulations have the advantage of giving a closer relationship over the seasonal cycle between the latitudes of the peak surface westerlies and the peak upward EP flux. In simulations with a comprehensive GCM, the dry and moist upward EP fluxes shift poleward by a similar amount as the climate warms. In simulations over a wider range of climates with an idealized GCM, the surface westerlies can shift both poleward and equatorward with warming, and they are influenced by an anomalous region of dry EP flux divergence near the subtropical jet. Using moist EP fluxes weakens this anomalous divergence in the idealized GCM simulations, and the shifts in the surface westerlies can then be understood through changes in the preference for equatorward or poleward wave propagation. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394341100012 |
WOS关键词 | ERTELS POTENTIAL-VORTICITY ; CIRCULATION RESPONSE ; GENERAL-CIRCULATION ; ATMOSPHERIC CIRCULATION ; CROSS-SECTIONS ; STORM TRACK ; EDDY ; ENERGY ; SIMULATIONS ; CONVECTION |
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/29595 |
专题 | 地球科学 |
作者单位 | MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Dwyer, John G.,39;Gorman, Paul A.. Moist Formulations of the Eliassen-Palm Flux and Their Connection to the Surface Westerlies[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(2). |
APA | Dwyer, John G.,&39;Gorman, Paul A..(2017).Moist Formulations of the Eliassen-Palm Flux and Their Connection to the Surface Westerlies.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(2). |
MLA | Dwyer, John G.,et al."Moist Formulations of the Eliassen-Palm Flux and Their Connection to the Surface Westerlies".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.2(2017). |
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