Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0285.1 |
Eurasian Cold Air Outbreaks under Different Arctic Stratospheric Polar Vortex Strengths | |
Huang, Jinlong; Tian, Wenshou | |
2019-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:5页码:1245-1264 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | This study analyzes the differences and similarities of Eurasian cold air outbreaks (CAOs) under the weak (CAOW), strong (CAOS), and neutral (CAON) stratospheric polar vortex states and examines the potential links between the polar vortex and Eurasian CAOs. The results indicate that the colder surface air temperature (SAT) over Europe in the earlier stages of CAOW events is likely because the amplitude of the preexisting negative North Atlantic Oscillation pattern is larger in CAOW events than in CAON and CAOS events. Marked by the considerably negative stratospheric Arctic Oscillation signals entering the troposphere, the SAT at midlatitudes over eastern Eurasia in CAOW events is colder than in CAON events. A larger diabatic heating rate related to a positive sensible heat flux anomaly in CAOW events likely offsets, to some degree, the cooling effect caused by the stronger cold advection and makes the differences in area-averaged SAT anomalies over northern Eurasia between the CAOW and CAON events look insignificant in most stages. Massive anomalous waves from the low-latitude western Pacific merge over northeastern Eurasia, then weaken the westerly wind over this region to create favorable conditions for southward advection of cold air masses in the earlier stages of all three types of CAOs. This study further analyzes the interannual relationship between the stratospheric polar vortex strength and the intensity of Eurasian CAOs and finds that climate models participating in phase 5 of the Coupled Model Intercomparison Project (CMIP5) relative to the reanalysis dataset tend to underestimate the correlation between them. The relationship between them is strengthening under representative concentration pathway 4.5 (RCP4.5) and 8.5 (RCP8.5) scenarios over the period 2006-60. In addition, the intensity of Eurasian CAOs exhibits a decreasing trend in the past and in the future. |
英文关键词 | Cold air surges Stratospheric circulation Stratosphere Stratosphere-troposphere coupling |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000466358900003 |
WOS关键词 | CHINESE ICE STORM ; DOWNWARD PROPAGATION ; LIFE-CYCLE ; INTERANNUAL VARIATION ; EXTREMES INDEXES ; MASS CIRCULATION ; EAST-ASIA ; TEMPERATURE ; ANOMALIES ; WEATHER |
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/183018 |
专题 | 地球科学 |
作者单位 | Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou, Gansu, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Jinlong,Tian, Wenshou. Eurasian Cold Air Outbreaks under Different Arctic Stratospheric Polar Vortex Strengths[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(5):1245-1264. |
APA | Huang, Jinlong,&Tian, Wenshou.(2019).Eurasian Cold Air Outbreaks under Different Arctic Stratospheric Polar Vortex Strengths.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(5),1245-1264. |
MLA | Huang, Jinlong,et al."Eurasian Cold Air Outbreaks under Different Arctic Stratospheric Polar Vortex Strengths".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.5(2019):1245-1264. |
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