DOI: 10.1007/s00382-017-3975-4
Scopus记录号: 2-s2.0-85037728343
论文题名: Multi-scale temporospatial variability of the East Asian Meiyu-Baiu fronts: characterization with a suite of new objective indices
作者: Li Y. ; Deng Y. ; Yang S. ; Zhang H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-05-06 起始页码: 1659
结束页码: 1670
语种: 英语
英文关键词: Meiyu-Baiu fronts
; Multi-temporospatial variability
; Objective indices
Scopus关键词: Arctic Oscillation
; atmospheric front
; climatology
; monsoon
; rainfall
; spatial variation
; temperature gradient
; temporal variation
; China
英文摘要: The Meiyu-Baiu front (MBF) is the primary weather system modulating the monsoonal rainfall in East Asia, and it exhibits pronounced variability across multiple temporal and spatial scales. A suite of new objective indices based upon daily reanalysis data are developed to characterize such variability, which include an “intensity” index effectively measuring the meridional gradient of equivalent potential temperature across the frontal zone, a “location” index documenting the central latitude and longitude of the front, and a “stationarity” index corresponding to the standard deviation of the daily central latitude. All these indices are characterized by strong interannual to interdecadal variations. Specifically, the MBF has shown a tendency of southwestward shift since the mid-1990s and become more stationary over southern China with reduced intraseasonal meandering. The western North Pacific subtropical high (WNPSH) is the main circulation feature affecting the location of the MBF on interannual timescales. The MBF moves northward (southward) when the WNPSH is anomalously strong (weak) and the surface high over the region of 35°–50°N/100°–120°E is anomalously weak (strong). When the WNPSH is strong, the MBF is often situated northwest to its climatological position and becomes more stationary. On interdecadal timescales, enhanced activity of high latitude blocking over East Asia is often accompanied with a stronger but less stationary MBF while a negative phase of the Arctic Oscillation favors a southward-shifted and more stationary MBF. © 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/109118
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: School of Atmospheric Sciences, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou, 510275, China; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, GA 30332-0340, United States; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-sen University, Guangzhou, China
Recommended Citation:
Li Y.,Deng Y.,Yang S.,et al. Multi-scale temporospatial variability of the East Asian Meiyu-Baiu fronts: characterization with a suite of new objective indices[J]. Climate Dynamics,2018-01-01,51(2018-05-06)