Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0759.1 |
The Weakened Intensity of the Atmospheric Quasi-Biweekly Oscillation over the Western North Pacific during Late Summer around the Late 1990s | |
Xu, Zhiqing1,2; Li, Tim3,4,5; Fan, Ke1,6,7 | |
2017-12-01 | |
发表期刊 | JOURNAL OF CLIMATE
![]() |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:24 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | The interdecadal Pacific oscillation (IPO) shifted to a negative phase around the late 1990s. Its impact on the atmospheric quasi-biweekly oscillation (QBWO) intensity over the western North Pacific (WNP) during late summer was investigated. Corresponding to the phase transition of the IPO, La Nina-like SST anomalies and an enhanced Walker circulation appeared in the tropical Pacific, which led to decreased precipitation over the equatorial central and eastern Pacific. The decreased precipitation induced a Gill response with an anomalous anticyclone (cyclone) in the lower (upper) troposphere over the WNP. This resulted in anomalous background westerly vertical shear over the tropical WNP. Furthermore, the anomalous anticyclone induced anomalous horizontal divergence and descent motion in the planetary boundary layer, which led to decreased background surface moisture over the tropical WNP. These changes in background atmospheric conditions suppressed the development of QBWO perturbations over the tropical WNP. Therefore, the QBWO intensity weakened over the WNP after the late 1990s. The composite evolution of QBWO events before and after the late 1990s confirm the interdecadal change of the QBWO intensity. A simple model was employed to understand the relative role of the background moisture and vertical shear changes in modulating the QBWO activity. The result shows that the moisture change plays a more important role than the vertical shear change in weakening the QBWO intensity. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423492500002 |
WOS关键词 | INTRASEASONAL OSCILLATIONS ; INTERANNUAL VARIATIONS ; GLOBAL PRECIPITATION ; WALKER CIRCULATION ; TROPICAL PACIFIC ; EQUATORIAL WAVES ; MONSOON ; CHINA ; VARIABILITY ; CLIMATOLOGY |
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/20926 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Nansen Zhu Int Res Ctr, Beijing, Peoples R China; 2.Chinese Acad Sci, Climate Change Res Ctr, Beijing, Peoples R China; 3.Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 4.Univ Hawaii Manoa, Dept Atmospher Sci, Honolulu, HI 96822 USA; 5.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Joint Int Res Lab Climate & Environm Change, Key Lab Meteorol Disaster,Minist Educ, Nanjing, Jiangsu, Peoples R China; 6.Univ Chinese Acad Sci, Beijing, Peoples R China; 7.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Zhiqing,Li, Tim,Fan, Ke. The Weakened Intensity of the Atmospheric Quasi-Biweekly Oscillation over the Western North Pacific during Late Summer around the Late 1990s[J]. JOURNAL OF CLIMATE,2017,30(24). |
APA | Xu, Zhiqing,Li, Tim,&Fan, Ke.(2017).The Weakened Intensity of the Atmospheric Quasi-Biweekly Oscillation over the Western North Pacific during Late Summer around the Late 1990s.JOURNAL OF CLIMATE,30(24). |
MLA | Xu, Zhiqing,et al."The Weakened Intensity of the Atmospheric Quasi-Biweekly Oscillation over the Western North Pacific during Late Summer around the Late 1990s".JOURNAL OF CLIMATE 30.24(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论