气候变化领域集成服务门户(CCPortal): The influence of the Madden-Julian oscillation on high-latitude surface air temperature during boreal winter

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DOI	10.1016/j.dynatmoce.2020.101141
	The influence of the Madden-Julian oscillation on high-latitude surface air temperature during boreal winter
	Cui J.; Yang S.; Li T.
发表日期	2020
ISSN	03770265
卷号	90
英文摘要	By analyzing NCEP-NCAR reanalysis daily data for 1979–2016, the modulation by Madden-Julian Oscillation (MJO) of the wintertime surface air temperature (SAT) over high latitude is examined. The real-time multivariate MJO (RMM) index, which divides the MJO into eight phases, is used. It is found that a significantly negative SAT anomaly over the northern high latitude region of (180°–60 °W, 60°–90 °N) lags the MJO convection for 1∼2 weeks in phase 3, in which the enhanced convective activity exists over the Indian Ocean. While a significantly positive SAT anomaly appears over the same region following the MJO phase 7, as the tropical heating shows an opposite sign. Analysis of the anomalous circulation indicates that the observed SAT signal is probably a result of the northeastward propagating Rossby wave train triggered by MJO-related tropical forcing through Rossby wave energy dispersion. By using an anomalous atmospheric general circulation model (AGCM), the significant effect of tropical forcing on organizing the extratropical circulation anomaly is confirmed. Analysis of a temperature tendency equation further reveals that the intraseasonal SAT anomaly is primarily attributed to the advection of the mean temperature by the wind anomaly associated with the anomalous circulation of the MJO-related variability. © 2020 Elsevier B.V.
英文关键词	Rossby wave train; Surface air temperature; The MJO; Wave activity flux
语种	英语
scopus关键词	Atmospheric temperature; Fluxes; Mechanical waves; Tropics; Wave energy conversion; Atmospheric general circulation models; Extratropical circulation; High-latitude regions; Madden-Julian oscillation; Rossby wave; Surface air temperatures; The MJO; Wave-activity flux; Climatology; air temperature; atmospheric general circulation model; finite element method; Madden-Julian oscillation; numerical model; Rossby wave; temperature effect; temperature profile
来源期刊	Dynamics of Atmospheres and Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178320
作者单位	Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environmental Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, China; International Pacific Research Center and Department of Atmospheric Sciences, University of Hawaii at Manoa, Honolulu, HI, United States
推荐引用方式 GB/T 7714	Cui J.,Yang S.,Li T.. The influence of the Madden-Julian oscillation on high-latitude surface air temperature during boreal winter[J],2020,90.
APA	Cui J.,Yang S.,&Li T..(2020).The influence of the Madden-Julian oscillation on high-latitude surface air temperature during boreal winter.Dynamics of Atmospheres and Oceans,90.
MLA	Cui J.,et al."The influence of the Madden-Julian oscillation on high-latitude surface air temperature during boreal winter".Dynamics of Atmospheres and Oceans 90(2020).