DOI: 10.1007/s00382-014-2048-1
Scopus记录号: 2-s2.0-84892456070
论文题名: Interdecadal variability of winter precipitation in Southeast China
作者: Zhang L. ; Zhu X. ; Fraedrich K. ; Sielmann F. ; Zhi X.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-07-08 起始页码: 2239
结束页码: 2248
语种: 英语
英文关键词: Arctic Oscillation
; Precipitation
; Sea Surface Temperature
; SPI
英文摘要: Interdecadal variability of observed winter precipitation in Southeast China (1961–2010) is characterized by the first empirical orthogonal function of the three-monthly Standardized Precipitation Index (SPI) subjected to a 9-year running mean. For interdecadal time scales the dominating spatial modes represent monopole features involving the Arctic Oscillation (AO) and the sea surface temperature (SST) anomalies. Dynamic composite analysis (based on NCEP/NCAR reanalyzes) reveals the following results: (1) Interdecadal SPI-variations show a trend from a dryer state in the 1970s via an increase during the 1980s towards stabilization on wetter conditions commencing with the 1990s. (2) Increasing wetness in Southeast China is attributed to an abnormal anticyclone over south Japan, with northward transport of warm and humid air from the tropical Pacific to South China. (3) In mid-to-high latitudes the weakened southward flow of polar airmasses induces low-level warming over Eurasia due to stronger AO by warmer zonal temperature advection. This indicates that AO is attributed to the Southeast China precipitation increase influenced by circulation anomalies over the mid-to-high latitudes. (4) The abnormal moisture transport along the southwestern boundary of the abnormal anticyclone over south Japan is related to anomalous south-easterlies modulated by the SST anomalies over Western Pacific Ocean; a positive (negative) SST anomaly will strengthen (weaken) warm and humid air transport, leading to abundant (reduced) precipitation in Southeast China. That is both AO and SST anomalies determine the nonlinear trend observed in winter precipitation over Southeast China. © 2014, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54689
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; KlimaCampus, Hamburg University, Hamburg, Germany; Max Planck Institute for Meteorology, Hamburg, Germany; Meteorological Institute, Hamburg University, Hamburg, Germany
Recommended Citation:
Zhang L.,Zhu X.,Fraedrich K.,et al. Interdecadal variability of winter precipitation in Southeast China[J]. Climate Dynamics,2014-01-01,43(2017-07-08)