Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-19-4517-2019 |
The climatology of the Brewer-Dobson circulation and the contribution of gravity waves | |
Sato, Kaoru; Hirano, Soichiro | |
2019-04-05 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS |
ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2019 |
卷号 | 19期号:7页码:4517-4539 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | The climatology of residual mean circulation - a main component of the Brewer-Dobson circulation - and the potential contribution of gravity waves (GWs) are examined for the annual mean state and each season in the whole stratosphere based on the transformed-Eulerian mean zonal momentum equation using four modern reanalysis datasets. Resolved and unresolved waves in the datasets are respectively designated as Rossby waves and GWs, although resolved waves may contain some GWs. First, the potential contribution of Rossby waves (RWs) to residual mean circulation is estimated from Eliassen-Palm flux divergence. The rest of residual mean circulation, from which the potential RW contribution and zonal mean zonal wind tendency are subtracted, is examined as the potential GW contribution, assuming that the assimilation process assures sufficient accuracy of the three components used for this estimation. The GWs contribute to drive not only the summer hemispheric part of the winter deep branch and low-latitude part of shallow branches, as indicated by previous studies, but they also cause a higher-latitude extension of the deep circulation in all seasons except for summer. This GW contribution is essential to determine the location of the turn-around latitude. The autumn circulation is stronger and wider than that of spring in the equinoctial seasons, regardless of almost symmetric RW and GW contributions around the Equator. This asymmetry is attributable to the existence of the spring-to-autumn pole circulation, corresponding to the angular momentum transport associated with seasonal variation due to the radiative process. The potential GW contribution is larger in Septemberto-November than in March-to-May in both hemispheres. The upward mass flux is maximized in the boreal winter in the lower stratosphere, while it exhibits semi-annual variation in the upper stratosphere. The boreal winter maximum in the lower stratosphere is attributable to stronger RW activity in both hemispheres than in the austral winter. Plausible deficiencies of current GW parameterizations are discussed by comparing the potential GW contribution and the parameterized GW forcing. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000463512700005 |
WOS关键词 | STRATOSPHERIC ZONAL WIND ; TROPICAL TROPOPAUSE TEMPERATURES ; MEAN-MERIDIONAL CIRCULATION ; MOMENTUM FLUX ; ANNUAL CYCLE ; HADLEY CIRCULATION ; LOWER ATMOSPHERE ; MOUNTAIN WAVE ; PART II ; MODEL |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; 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/182289 |
专题 | 地球科学 |
作者单位 | Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan |
推荐引用方式 GB/T 7714 | Sato, Kaoru,Hirano, Soichiro. The climatology of the Brewer-Dobson circulation and the contribution of gravity waves[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(7):4517-4539. |
APA | Sato, Kaoru,&Hirano, Soichiro.(2019).The climatology of the Brewer-Dobson circulation and the contribution of gravity waves.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(7),4517-4539. |
MLA | Sato, Kaoru,et al."The climatology of the Brewer-Dobson circulation and the contribution of gravity waves".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.7(2019):4517-4539. |
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