Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-16-0135.1 |
Tropospheric Turbulence over the Tropical Open Ocean: Role of Gravity Waves | |
Bellenger, H.1; Wilson, R.2; Davison, J. L.3; Duvel, J. P.4; Xu, W.5; Lott, F.4; Katsumata, M.1 | |
2017-04-01 | |
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:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; France; USA |
英文摘要 | A large set of soundings obtained in the Indian Ocean during three field campaigns is used to provide statistical characteristics of tropospheric turbulence and its link with gravity wave (GW) activity. The Thorpe method is used to diagnose turbulent regions of a few hundred meters depth. Above the mixed layer, turbulence frequency varies from; 10% in the lower troposphere up to; 30% around 12-km height. GWs are captured by their signature in horizontal wind, normalized temperature, and balloon vertical ascent rate. These parameters emphasize different parts of the wave spectrum from longer to shorter vertical wavelengths. Composites are constructed in order to reveal the vertical structure of the waves and their link with turbulence. The relatively longer-wavelength GWs described by their signature in temperature (GWTs) are more active in the lower troposphere, where they are associated with clear variations in moisture. Turbulence is then associated with minimum static stability and vertical shear, stressing the importance of the former and the possibility of convective instability. Conversely, the short waves described by their signature in balloon ascent rate (GWws) are detected primarily in the upper troposphere, and their turbulence is associated with a vertical shear maximum, suggesting the importance of dynamic instability. Furthermore, GWws appear to be linked with local convection, whereas GWTs are more active in suppressed and dry phases in particular of the Madden-Julian oscillation. These waves may be associated with remote sources, such as organized convection or local fronts, such as those associated with dry-air intrusions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399333700016 |
WOS关键词 | EQUATORIAL ATMOSPHERE DYNAMICS ; MADDEN-JULIAN OSCILLATION ; REVISED CONCEPTUAL-MODEL ; MST RADAR MEASUREMENTS ; CLOUD-TOP HEIGHT ; S-BAND RADAR ; INDIAN-OCEAN ; BRAGG SCATTERING ; RADIOSONDE DATA ; MU RADAR |
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/29810 |
专题 | 地球科学 |
作者单位 | 1.Japan Agcy Marine Earth Sci & Technol, Yokosuka, Kanagawa, Japan; 2.Milieux, Lab Atmosphere, Observat Spatiales, Paris, France; 3.Lower Atmosphere Res Grp, Merritt Isl, FL USA; 4.Lab Meteorol Dynam, Paris, France; 5.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Bellenger, H.,Wilson, R.,Davison, J. L.,et al. Tropospheric Turbulence over the Tropical Open Ocean: Role of Gravity Waves[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(4). |
APA | Bellenger, H..,Wilson, R..,Davison, J. L..,Duvel, J. P..,Xu, W..,...&Katsumata, M..(2017).Tropospheric Turbulence over the Tropical Open Ocean: Role of Gravity Waves.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(4). |
MLA | Bellenger, H.,et al."Tropospheric Turbulence over the Tropical Open Ocean: Role of Gravity Waves".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.4(2017). |
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