DOI: 10.1007/s00382-017-3876-6
Scopus记录号: 2-s2.0-85028958625
论文题名: The Eurasia–North Pacific Oscillation in atmospheric mass variations independent of both IHO and AO and its possible impacts on winter climate
作者: Zhang Q. ; Guan Z. ; Li M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4303
结束页码: 4322
语种: 英语
英文关键词: Atmospheric mass
; Eurasia–North Pacific domain
; Tele-connection
; Winter climate anomalies
Scopus关键词: air temperature
; Arctic Oscillation
; atmospheric circulation
; atmospheric pressure
; climate variation
; land-sea interaction
; rainfall
; Rossby wave
; teleconnection
; wave propagation
; winter
; China
; Europe
; Pacific Ocean
; Pacific Ocean (North)
; Sea of Okhotsk
; Siberia
; Xinjiang Uygur
英文摘要: Using NCEP/NCAR reanalysis, we have investigated the features of migrations of atmospheric mass (AM) between land and ocean in Eurasia–North Pacific domain in boreal winter after having both signals of Inter-hemispheric Oscillation and Arctic Oscillation removed from the physical quantities. It is found that there is a Eurasia–North Pacific Oscillation (ENPO) in surface air pressure anomalies. This ENPO pattern characterizes with two oppositely signed anomalous surface pressure centers over Eurasia and North Pacific respectively, indicating strong connections between Siberian high and Aleutian low during period 1979–2012. The maintenance of this ENPO teleconnection is significantly associated with three factors including the anomalous AM flows and zonal circulation cell over Eurasia–North Pacific domain, the Rossby wave energy propagations, and the thermal forcing contrasts near the surface between Eurasia and North Pacific during boreal winter. The variations of both wintertime rainfall and temperature over Eurasia may be strongly affected by ENPO. When the ENPO index is positive (negative), there occurs the AM accumulation (depletion) over Eurasia with simultaneous depletion (accumulation) over mid-latitude North-Pacific. Correspondingly, this anomalous surface pressure pattern along with the related circulation anomalies at different isobaric levels possibly results in winter precipitation decreases (increases) over Siberian Plain and East China, whereas increases (decreases) over southeastern Europe, Xinjiang of China, and the west coast of Sea of Okhotsk. On the other hand, surface air temperature decreases (increases) over large areas of Eurasia. These results are helpful for our better understanding the mechanisms behind circulation and winter climate variations over Eurasia–North Pacific region. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109275
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, 210044, China
Recommended Citation:
Zhang Q.,Guan Z.,Li M.. The Eurasia–North Pacific Oscillation in atmospheric mass variations independent of both IHO and AO and its possible impacts on winter climate[J]. Climate Dynamics,2018-01-01,50(2018-11-12)