DOI: 10.1175/JCLI-D-13-00183.1
Scopus记录号: 2-s2.0-84988293937
论文题名: Influences of the Pacific-Japan teleconnection pattern on synoptic-scale variability in the Western North Pacific
作者: Li R.C.Y. ; Zhou W. ; Li T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 1 起始页码: 140
结束页码: 154
语种: 英语
Scopus关键词: Atmospheric thermodynamics
; Moisture
; Atmosphere-ocean interactions
; Atmospheric circulation
; Atmospheric general circulation models
; Environmental parameter
; Intraseasonal variations
; Madden-Julian oscillation
; Planetary boundary layers
; Teleconnection patterns
; Climate change
; air-sea interaction
; atmospheric circulation
; atmospheric general circulation model
; atmospheric moisture
; boundary layer
; cyclogenesis
; Madden-Julian oscillation
; seasonal variation
; synoptic meteorology
; teleconnection
; thermodynamic property
; vertical profile
; Pacific Ocean
; Pacific Ocean (North)
; Sugarcane streak virus
英文摘要: This study investigates the influences of the Pacific-Japan (PJ) teleconnection pattern on synoptic-scale variability (SSV) in the western North Pacific (WNP). The PJ pattern exhibits salient intraseasonal variations, with a dominant peak at 10-50 days. During positive PJ phases, strengthened SSV is found in the WNP, with a much stronger and better organized synoptic wave train structure. Such a synoptic-scale wave train, however, is greatly weakened during negative PJ phases. Examination of the vertical profiles of the observational data suggests that environmental parameters are generally more (less) favorable for the growth of synoptic disturbances under positive (negative) PJ conditions. Observational results are further verified with an anomaly atmospheric general circulation model, which reveals faster (slower) growth of the synoptic-scale wave train when the environmental anomalies associated with positive (negative) PJ phases are incorporated into the summer mean state of the model. In addition, sensitivity experiments indicate that thermodynamic parameters of the planetary boundary layer (PBL) play a determining role in controlling the development of synoptic disturbances in the WNP. The increase (decrease) in background PBL moisture during positive (negative) PJ phases enhances (suppresses) perturbation moisture convergence and thus the convective heating associated with SSV, leading to strengthened (weakened) synoptic-scale activity in the WNP. Serving as potential seed disturbances for cyclogenesis, the strengthened (weakened) synoptic-scale activity may also contribute to the enhancement (suppression) in intraseasonal TC frequency during positive (negative) PJ phases. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51063
Appears in Collections: 气候变化事实与影响
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作者单位: Guy Carpenter Asia-Pacific Climate Impact Center, School of Energy and Environment, City University of Hong Kong, China; International Pacific Research Center, Department of Meteorology, University of Hawai'i at Manoa, Honolulu, HI, United States
Recommended Citation:
Li R.C.Y.,Zhou W.,Li T.. Influences of the Pacific-Japan teleconnection pattern on synoptic-scale variability in the Western North Pacific[J]. Journal of Climate,2014-01-01,27(1)