| Why nocturnal long-duration rainfall presents an eastward-delayed diurnal phase of rainfall down the yangtze river valley | |
| Chen, Haoming2,3; Yu, Rucong1,2; Li, Jian1; Yuan, Weihua2,3; Zhou, Tianjun2 | |
| 刊名 | Journal of climate
 |
| 2010-02-01 | |
| 卷号 | 23期号:4页码:905-917 |
| ISSN号 | 0894-8755 |
| DOI | 10.1175/2009jcli3187.1 |
| 通讯作者 | Yu, rucong(yrc@cma.gov.cn) |
| 英文摘要 | Hourly observational records and 6-hourly reanalysis data were used to investigate the influences of large-scale forcings on the diurnal variation of summer rainfall along the yangtze river (yr). the results show that long-duration (more than six hours) rainfall events dominate the summer rainfall along the yr. these events tend to start during the night and to peak after several hours of development. the eastward-delayed initiation of the nocturnal long-duration rainfall events is thought to be due to the diurnal clockwise rotation of the low-tropospheric circulation, especially the accelerated nocturnal southwesterlies. in the early evening, the anomalous easterly flow toward the tibetan plateau (tp) causes low-level convergence over the plateau's eastern slope that induces the formation of rainfall in the upper yr valley. the anomalous wind sequentially rotates clockwise to a southerly flow at midnight and accelerates the meridional wind in the middle valley, resulting in the initiation of rainfall between 2300 and 0300 lst. in the early morning, the accelerated southwesterlies in southern china, when combined with decelerated winds in the north of the yr, causes a strong convergence along the yr and contributes to the early morning rainfall in the lower valley. furthermore, the development of the convection systems is suppressed in the afternoon by the mid- and low-level warm advection downstream from the tp. this helps explain why long-duration events do not typically start in the afternoon in the upper yr valley. |
| WOS关键词 | EASTERN CHINA ; HYDROLOGIC-CYCLE ; TIBETAN PLATEAU ; HEAVY RAINFALL ; UNITED-STATES ; GREAT-PLAINS ; PRECIPITATION ; VARIABILITY ; CLIMATE ; SUMMER |
| WOS研究方向 | Meteorology & Atmospheric Sciences |
| WOS类目 | Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| 出版者 | AMER METEOROLOGICAL SOC |
| WOS记录号 | WOS:000275253200006 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2412920 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Yu, Rucong |
| 作者单位 | 1.China Meteorol Adm, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, LASG, Beijing, Peoples R China 3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Haoming,Yu, Rucong,Li, Jian,et al. Why nocturnal long-duration rainfall presents an eastward-delayed diurnal phase of rainfall down the yangtze river valley[J]. Journal of climate,2010,23(4):905-917. |
| APA | Chen, Haoming,Yu, Rucong,Li, Jian,Yuan, Weihua,&Zhou, Tianjun.(2010).Why nocturnal long-duration rainfall presents an eastward-delayed diurnal phase of rainfall down the yangtze river valley.Journal of climate,23(4),905-917. |
| MLA | Chen, Haoming,et al."Why nocturnal long-duration rainfall presents an eastward-delayed diurnal phase of rainfall down the yangtze river valley".Journal of climate 23.4(2010):905-917. |
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