DOI: 10.1175/JCLI-D-13-00041.1
Scopus记录号: 2-s2.0-84885353408
论文题名: Identification of the eurasian-north pacific multidecadal oscillation and its relationship to the amo
作者: Lee M.-Y. ; Hsu H.-H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 20 起始页码: 8139
结束页码: 8153
语种: 英语
Scopus关键词: Asymmetric perturbations
; Atlantic multidecadal oscillations
; Geo-potential heights
; Multi-decadal time scale
; Multidecadal variability
; Northern hemisphere
; Sea surface temperature anomalies
; Vertical structures
; Computer simulation
; Tropics
; Troposphere
; air-sea interaction
; Atlantic Multidecadal Oscillation
; barotropic motion
; computer simulation
; geopotential
; mountain region
; Northern Hemisphere
; Pacific Decadal Oscillation
; sea surface temperature
; Southern Hemisphere
; temperature anomaly
; topography
; troposphere
英文摘要: A multidecadal geopotential height pattern in the upper troposphere of the extratropical Northern Hemisphere (NH) is identified in this study. This pattern is characterized by the nearly zonal symmetry of geopotential height and temperature between 358 and 658N and the equivalent barotropic vertical structure with the largest amplitude in the upper troposphere. This pattern is named the Eurasian-Pacific multidecadal oscillation (EAPMO) to describe its multidecadal time scale and the largest amplitudes over Eurasia and the North Pacific. Although nearly extending over the entire extratropics, theEAPMOexhibits larger amplitudes over western Europe, East Asia, and the North Pacific with a zonal scale equivalent to zonal wavenumbers 4 and 5. The zonally asymmetric perturbation tends to amplify over the major mountain ranges in the region, suggesting a significant topographic influence. The EAPMO has fluctuated concurrently with the Atlantic multidecadal oscillation (AMO) at least since the beginning of the twentieth century. The numerical simulation results suggest that the EAPMO could be induced by the AMO-like sea surface temperature anomaly and strengthened regionally by topography, especially over the Asian highland region, although the amplitude was undersimulated. This study found that the multidecadal variability of the upper-tropospheric geopotential height in the extratropical NH is much more complicated than in the tropics and the Southern Hemisphere (SH). It takes both first (warming trend) and second (multidecadal) EOFs to explain the multidecadal variability in the extratropicalNH, while only the firstEOF, which exhibited a warming trend, is sufficient for the tropics and SH. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51602
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan; Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan
Recommended Citation:
Lee M.-Y.,Hsu H.-H.. Identification of the eurasian-north pacific multidecadal oscillation and its relationship to the amo[J]. Journal of Climate,2013-01-01,26(20)