DOI: 10.1007/s00382-011-1205-z
Scopus记录号: 2-s2.0-84866387847
论文题名: Pacific and Atlantic influences on Mesoamerican climate over the past millennium
作者: Stahle D.W. ; Burnette D.J. ; Diaz J.V. ; Heim Jr. R.R. ; Fye F.K. ; Paredes J.C. ; Soto R.A. ; Cleaveland M.K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 6 起始页码: 1431
结束页码: 1446
语种: 英语
英文关键词: ENSO
; Mesoamerica
; Montezuma baldcypress
; PDSI
; Tree rings
英文摘要: A new tree-ring reconstruction of the Palmer Drought Severity Index (PDSI) for Mesoamerica from AD 771 to 2008 identifies megadroughts more severe and sustained than any witnessed during the twentieth century. Correlation analyses indicate strong forcing of instrumental and reconstructed June PDSI over Mesoamerica from the El Niño/Southern Oscillation (ENSO). Spectral analyses of the 1,238-year reconstruction indicate significant concentrations of variance at ENSO, sub-decadal, bi-decadal, and multidecadal timescales. Instrumental and model-based analyses indicate that the Atlantic Multidecadal Oscillation is important to warm season climate variability over Mexico. Ocean-atmospheric variability in the Atlantic is not strongly correlated with the June PDSI reconstruction during the instrumental era, but may be responsible for the strong multidecadal variance detected in the reconstruction episodically over the past millennium. June drought indices in Mesoamerica are negatively correlated with gridded June PDSI over the United States from 1950 to 2005, based on both instrumental and reconstructed data. Interannual variability in this latitudinal moisture gradient is due in part to ENSO forcing, where warm events favor wet June PDSI conditions over the southern US and northern Mexico, but dryness over central and southern Mexico (Mesoamerica). Strong anti-phasing between multidecadal regimes of tree-ring reconstructed June PDSI over Mesoamerica and reconstructed summer (JJA) PDSI over the Southwest has also been detected episodically over the past millennium, including the 1950-1960s when La Niña and warm Atlantic SSTs prevailed, and the 1980-1990s when El Niño and cold Atlantic SSTs prevailed. Several Mesoamerican megadroughts are reconstructed when wetness prevailed over the Southwest, including the early tenth century Terminal Classic Drought, implicating El Niño and Atlantic SSTs in this intense and widespread drought that may have contributed to social changes in ancient Mexico. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55186
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geosciences, University of Arkansas, Ozark Hall 113, Fayetteville, AR 72701, United States; Laboratorio de Dendrocronologia, Instituto Nacional de Investigaciones Forestales, Agricolas, y Pecuarias, CENID-RESPID Km 6.5 margen derecha canal Sacramento, Gomez Palacio, Durango, Mexico; National Climatic Data Center, NOAA, Asheville, NC, United States; Departamento Microbiologia y Parastologia, UNAM, Mexico, D.F., Mexico
Recommended Citation:
Stahle D.W.,Burnette D.J.,Diaz J.V.,et al. Pacific and Atlantic influences on Mesoamerican climate over the past millennium[J]. Climate Dynamics,2012-01-01,39(6)