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DOI | 10.1175/JAS-D-18-0188.1 |
The Three Atmospheric Circulations over the Indian Ocean and the Maritime Continent and Their Modulation by the Passage of the MJO | |
Kuznetsova, Daria; Dauhut, Thibaut; Chaboureau, Jean-Pierre | |
2019-02-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:2页码:517-531 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | The passage of the Madden-Julian oscillation (MJO) over the Indian Ocean and the Maritime Continent is investigated during the episode of 23-30 November 2011. A Meso-NH convection-permitting simulation with a horizontal grid spacing of 4 km is examined. The simulation reproduces the MJO signal correctly, showing the eastward propagation of the primary rain activity. The atmospheric overturning is analyzed using the isentropic method, which separates the ascending air with high equivalent potential temperature from the subsiding air with low equivalent potential temperature. Three key circulations are found. The first two circulations are a tropospheric deep circulation spanning from the surface to an altitude of 14 km and an overshoot circulation within the tropical tropopause layer. As expected for circulations associated with deep convection, their intensities, as well as their diabatic tendencies, increase during the active phase of the MJO, while their entrainment rates decrease. The third circulation is characterized by a rising of air with low equivalent potential temperature in the lower free troposphere. The intensity of the circulation, as well as its depth, varies with the MJO activity. During the suppressed phase, this circulation is associated with a dry air intrusion from the subtropical region into the tropical band and shows a strong drying of the lower to middle troposphere. |
英文关键词 | Tropics Convection Mesoscale processes Cloud resolving models Intraseasonal variability Tropical variability |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458086400001 |
WOS关键词 | DRY AIR ; MODEL ; OSCILLATION ; SIMULATION ; TURBULENCE ; MESOSCALE |
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/29740 |
专题 | 地球科学 |
作者单位 | Univ Toulouse, UPS, CNRS, Lab Aerol, Toulouse, France |
推荐引用方式 GB/T 7714 | Kuznetsova, Daria,Dauhut, Thibaut,Chaboureau, Jean-Pierre. The Three Atmospheric Circulations over the Indian Ocean and the Maritime Continent and Their Modulation by the Passage of the MJO[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(2):517-531. |
APA | Kuznetsova, Daria,Dauhut, Thibaut,&Chaboureau, Jean-Pierre.(2019).The Three Atmospheric Circulations over the Indian Ocean and the Maritime Continent and Their Modulation by the Passage of the MJO.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(2),517-531. |
MLA | Kuznetsova, Daria,et al."The Three Atmospheric Circulations over the Indian Ocean and the Maritime Continent and Their Modulation by the Passage of the MJO".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.2(2019):517-531. |
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