DOI: 10.1016/j.quascirev.2015.06.023
Scopus记录号: 2-s2.0-84945471107
论文题名: Holocene climate variability in Texas, USA: An integration of existing paleoclimate data and modeling with a new, high-resolution speleothem record
作者: Wong C.I. ; Banner J.L. ; Musgrove M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127 起始页码: 155
结束页码: 173
语种: 英语
英文关键词: Holocene
; Paleoclimate reconstruction
; Speleothem
; Texas
Scopus关键词: Climatology
; Moisture
; Precipitation (meteorology)
; Trace elements
; Holocene climate variability
; Holocenes
; Paleoclimate reconstruction
; Precipitation variability
; Reconstruction of past climate
; Speleothem
; Texas
; Trace element concentrations
; Climate change
; climate modeling
; climate variation
; data interpretation
; Holocene
; moisture content
; oxygen isotope
; paleoclimate
; proxy climate record
; reconstruction
; speleothem
; Texas
; United States
英文摘要: Delineating the climate processes governing precipitation variability in drought-prone Texas is critical for predicting and mitigating climate change effects, and requires the reconstruction of past climate beyond the instrumental record. We synthesize existing paleoclimate proxy data and climate simulations to provide an overview of climate variability in Texas during the Holocene. Conditions became progressively warmer and drier transitioning from the early to mid Holocene, culminating between 7 and 3 ka (thousand years ago), and were more variable during the late Holocene. The timing and relative magnitude of Holocene climate variability, however, is poorly constrained owing to considerable variability among the different records. To help address this, we present a new speleothem (NBJ) reconstruction from a central Texas cave that comprises the highest resolution proxy record to date, spanning the mid to late Holocene. NBJ trace-element concentrations indicate variable moisture conditions with no clear temporal trend. There is a decoupling between NBJ growth rate, trace-element concentrations, and δ18O values, which indicate that (i) the often direct relation between speleothem growth rate and moisture availability is likely complicated by changes in the overlying ecosystem that affect subsurface CO2 production, and (ii) speleothem δ18O variations likely reflect changes in moisture source (i.e., proportion of Pacific-vs. Gulf of Mexico-derived moisture) that appear not to be linked to moisture amount. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59807
Appears in Collections: 过去全球变化的重建
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作者单位: Dept. of Earth and Environmental Science, Boston College, United States; Dept. of Geological Sciences, The University of Texas at Austin, United States; Texas Water Science Center, U.S. Geological Survey, United States
Recommended Citation:
Wong C.I.,Banner J.L.,Musgrove M.. Holocene climate variability in Texas, USA: An integration of existing paleoclimate data and modeling with a new, high-resolution speleothem record[J]. Quaternary Science Reviews,2015-01-01,127