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DOI | 10.1175/JCLI-D-17-0266.1 |
Decadal Relationship between the Stratospheric Arctic Vortex and Pacific Decadal Oscillation | |
Hu, Dingzhu; Guan, Zhaoyong | |
2018-05-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2018 |
卷号 | 31期号:9页码:3371-3386 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Using reanalysis datasets and numerical simulations, the relationship between the stratospheric Arctic vortex (SAV) and the Pacific decadal oscillation (PDO) on decadal time scales was investigated. Asignificant in-phase relationship between the PDO and SAV on decadal time scales during 1950-2014 is found, that is, the North Pacific sea surface temperature (SST) cooling (warming) associated with the positive (negative) PDO phases is closely related to the strengthening (weakening) of the SAV. This decadal relationship between the North Pacific SST and SAV is different from their relationship on subdecadal time scales. Observational and modeling results both demonstrate that the decadal variation in the SAV is strongly affected by the North Pacific SSTs related to the PDO via modifying the upward propagation of planetary wavenumber-1 waves from the troposphere to the stratosphere. The decreased SSTs over the North Pacific tend to result in a deepened Aleutian low along with a strengthened jet stream over the North Pacific, which excites a weakened western Pacific pattern and a strengthened Pacific-North American pattern. These tropospheric circulation anomalies are in accordance with the decreased refractive index (RI) at middle and high latitudes in the northern stratosphere during the positivePDOphase. The increased RI at high latitudes in the upper troposphere impedes the planetary wavenumber-1 wave from propagating into the stratosphere, and in turn strengthens the SAV. The responses of the RI to the PDO are mainly contributions of the changes in the meridional gradient of the zonal-mean potential vorticity via alteration of the baroclinic term -f(2)/rho(0) (rho(0)(U) over bar (z)/ N-2)(z). |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429529900002 |
WOS关键词 | NORTHERN WINTER STRATOSPHERE ; POLAR VORTEX ; VARIABILITY ; HEMISPHERE ; TEMPERATURE ; PROPAGATION ; CLIMATE ; MODEL ; SCALE ; ENSO |
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/19543 |
专题 | 气候变化 |
作者单位 | Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disasters, China Minist Educ, Joint Int Res Lab Climate & Environm Change,Colla, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Hu, Dingzhu,Guan, Zhaoyong. Decadal Relationship between the Stratospheric Arctic Vortex and Pacific Decadal Oscillation[J]. JOURNAL OF CLIMATE,2018,31(9):3371-3386. |
APA | Hu, Dingzhu,&Guan, Zhaoyong.(2018).Decadal Relationship between the Stratospheric Arctic Vortex and Pacific Decadal Oscillation.JOURNAL OF CLIMATE,31(9),3371-3386. |
MLA | Hu, Dingzhu,et al."Decadal Relationship between the Stratospheric Arctic Vortex and Pacific Decadal Oscillation".JOURNAL OF CLIMATE 31.9(2018):3371-3386. |
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