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DOI | 10.1175/JAS-D-17-0197.1 |
Diurnal Evolution and Structure of Long-Lived Mesoscale Convective Vortices along the Mei-Yu Front over the East China Plains | |
Zhang, Yuanchun1,2,3; Zhang, Fuqing2,3; Davis, Christopher A.4; Sun, Jianhua1 | |
2018-03-01 | |
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:3页码:1005-1025 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The structure and diurnal evolution of long-lived, eastward-propagating mesoscale convective vortices (MCVs) along typical summertime mei-yu fronts over the east China plains are investigated through composite analysis of a 30-day semi-idealized simulation. The simulation uses lateral boundary conditions that vary only diurnally in time using analyses of recurring MCV events during 1-10 July 2007. Hence, the behavior of convection and vorticity follows a closely repeating diurnal cycle for each day during the simulation. Assisted by the eastward extension of enhanced vorticity anomalies from the Sichuan basin, the incipient MCV forms in the morning hours over the immediate lee (east) of the central China mountain ranges (stage 1). From local afternoon to early evening, as the MCV moves over the plains, convection weakens in the daytime downward branch of the mountain-plains solenoid. This allows the upper-level and lower-level portions of the vortex to partially decouple, and for convection to shift to the east-southeast side of the surface vortex (stage 2). Immediately after sunset, convection reinvigorates above the low-level MCV center as a result of moistening and destabilization from a combination of radiative forcing and an intensified low-level jet. This intensifies the MCV to maturity (stage 3). The mature MCV eventually evolves into an occluding subsynoptic cyclone with strong convection across all sectors of the low-level vorticity center during the subsequent day's morning hours along the east China coastal plains before it moves offshore (stage 4). |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429576900017 |
WOS关键词 | AIRBORNE DOPPLER RADAR ; WARM-SEASON ; PART I ; POTENTIAL VORTICITY ; TIBETAN PLATEAU ; VORTEX ; SYSTEM ; PRECIPITATION ; MECHANISMS ; DYNAMICS |
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/29378 |
专题 | 地球科学 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Cloud Precipitat Phys & Severe Storms LAC, Beijing, Peoples R China; 2.Penn State Univ, Dept Meteorol & Atmospher Sci, University Pk, PA 16802 USA; 3.Penn State Univ, Ctr Adv Data Assimilat & Predictabil Tech, University Pk, PA 16802 USA; 4.Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA |
推荐引用方式 GB/T 7714 | Zhang, Yuanchun,Zhang, Fuqing,Davis, Christopher A.,et al. Diurnal Evolution and Structure of Long-Lived Mesoscale Convective Vortices along the Mei-Yu Front over the East China Plains[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(3):1005-1025. |
APA | Zhang, Yuanchun,Zhang, Fuqing,Davis, Christopher A.,&Sun, Jianhua.(2018).Diurnal Evolution and Structure of Long-Lived Mesoscale Convective Vortices along the Mei-Yu Front over the East China Plains.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(3),1005-1025. |
MLA | Zhang, Yuanchun,et al."Diurnal Evolution and Structure of Long-Lived Mesoscale Convective Vortices along the Mei-Yu Front over the East China Plains".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.3(2018):1005-1025. |
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