DOI: 10.1002/2017JD026812
论文题名: Exploring the combined effects of the Arctic Oscillation and ENSO on the wintertime climate over East Asia using self-organizing maps
作者: Huang W. ; Chen R. ; Yang Z. ; Wang B. ; Ma W.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
语种: 英语
英文关键词: Arctic Oscillation
; Combined effects
; East Asian winter monsoon
; ENSO
; Nonlinear method
英文摘要: To examine the combined effects of the different spatial patterns of the Arctic Oscillation (AO)-related sea level pressure (SLP) anomalies and the El Niño-Southern Oscillation (ENSO)-related sea surface temperature (SST) anomalies on the wintertime surface temperature anomalies over East Asia, a nonlinear method based on self-organizing maps is employed. Investigation of identified regimes reveals that the AO can affect East Asian temperature anomalies when there are significant SLP anomalies over the Arctic Ocean and northern parts of Eurasian continent. Analogously, ENSO is found to affect East Asian temperature anomalies when significant SST anomalies are present over the tropical central Pacific. The regimes with the warmest and coldest temperature anomalies over East Asia are both associated with the negative phase of the AO. The ENSO-activated, Pacific-East Asian teleconnection pattern could affect the higher latitude continental regions when the impact of the AO is switched off. When the spatial patterns of the AO and ENSO have significant, but opposite, impacts on the coastal winds, no obvious temperature anomalies can be observed over south China. Further, the circulation state with nearly the same AO and Niño3 indices may drive rather different responses in surface temperature over East Asia. The well-known continuous weakening (recovery) of the East Asian winter monsoon that occurred around 1988 (2009) can be attributed to the transitions of the spatial patterns of the SLP anomalies over the Arctic Ocean and Eurasian continent, through their modulation on the occurrences of the Ural and central Siberian blocking events. © 2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62776
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Ministry of Education Key Laboratory for Earth System Modeling, and Department of Earth System Science (DESS) Tsinghua University Beijing China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG) Institute of Atmospheric Physics (IAP), Chinese Academy of Sciences Beijing China
Recommended Citation:
Huang W.,Chen R.,Yang Z.,et al. Exploring the combined effects of the Arctic Oscillation and ENSO on the wintertime climate over East Asia using self-organizing maps[J]. Journal of Geophysical Research: Atmospheres,2017-01-01