Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0351.1 |
Observation of Quasi-2-Day Convective Disturbances in the Equatorial Indian Ocean during DYNAMO | |
Yu, Hungjui1; Johnson, Richard H.2; Ciesielski, Paul E.2; Kuo, Hung-Chi1 | |
2018-09-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:9页码:2867-2888 |
文章类型 | Article |
语种 | 英语 |
国家 | Taiwan; USA |
英文摘要 | This study examines the westward-propagating convective disturbances with quasi-2-day intervals of occurrence identified over Gan Island in the central Indian Ocean from mid- to late October 2011 during the Dynamics of the Madden-Julian Oscillation (DYNAMO) field campaign. Atmospheric sounding, satellite, and radar data are used to develop a composite of seven such disturbances. Composites and spectral analyses reveal that 1) the quasi-2-day convective events comprise westward-propagating diurnal convective disturbances with phase speeds of 10-12 m s(-1) whose amplitudes are modulated on a quasi-2-day time scale on a zonal scale of 1000 km near the longitudes of Gan; 2) the cloud life cycle of quasi-2-day convective disturbances shows a distinct pattern of tropical cloud population evolutionfrom shallow to deep to stratiform convection; 3) the time scales of mesoscale convective system development and boundary layer modulation play essential roles in determining the periodicity of the quasi-2-day convective events; and 4) in some of the quasi-2-day events there is evidence of counterpropagating (westward and eastward) cloud systems along the lines proposed by Yamada et al. Based on these findings, an interpretation is proposed for the mechanisms for the quasi-2-day disturbances observed during DYNAMO that combines concepts from prior studies of this phenomenon over the western Pacific and Indian Oceans. |
英文关键词 | Clouds Convective clouds Stratiform clouds Precipitation Mesoscale processes Mesoscale systems |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000440542900002 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; TOGA-COARE IOP ; SCALE CLOUD DISTURBANCES ; TROPICAL WESTERN PACIFIC ; MIDLATITUDE SQUALL LINE ; MOISTURE BUDGETS ; TRIMODAL CHARACTERISTICS ; MULTISCALE VARIABILITY ; DIURNAL-VARIATION ; VERTICAL MOTION |
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/29559 |
专题 | 地球科学 |
作者单位 | 1.Natl Taiwan Univ, Dept Atmospher Sci, Taipei, Taiwan; 2.Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA |
推荐引用方式 GB/T 7714 | Yu, Hungjui,Johnson, Richard H.,Ciesielski, Paul E.,et al. Observation of Quasi-2-Day Convective Disturbances in the Equatorial Indian Ocean during DYNAMO[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(9):2867-2888. |
APA | Yu, Hungjui,Johnson, Richard H.,Ciesielski, Paul E.,&Kuo, Hung-Chi.(2018).Observation of Quasi-2-Day Convective Disturbances in the Equatorial Indian Ocean during DYNAMO.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(9),2867-2888. |
MLA | Yu, Hungjui,et al."Observation of Quasi-2-Day Convective Disturbances in the Equatorial Indian Ocean during DYNAMO".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.9(2018):2867-2888. |
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