globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.08.022
Scopus记录号: 2-s2.0-84955469224
论文题名:
Assessing the strength of the monsoon during the late Pleistocene in southwestern United States
作者: Cisneros-Dozal L.M.; Huang Y.; Heikoop J.M.; Fawcett P.J.; Fessenden J.; Anderson R.S.; Meyers P.A.; Larson T.; Perkins G.; Toney J.; Werne J.P.; Goff F.; WoldeGabriel G.; Allen C.D.; Berke M.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 103
起始页码: 81
结束页码: 90
语种: 英语
英文关键词: Drought ; Hydrogen isotope ; Leaf plant waxes ; Monsoonal precipitation ; Southwestern US
Scopus关键词: Atmospheric temperature ; Drought ; Glacial geology ; Isotopes ; Oceanography ; Plants (botany) ; Salinity measurement ; Surface waters ; Controlled precipitation ; Ecosystem productivity ; Glacial-interglacial cycles ; Hydrogen isotope ; Marine isotope stages ; Mean annual temperatures ; Monsoonal precipitation ; Sea surface temperature (SST) ; Atmospheric thermodynamics ; Juniperus ; Quercus
英文摘要: Improved predictions of drought require an understanding of natural and human-induced climate variability. Long-term records across glacial-interglacial cycles provide the natural component of variability, however few such records exist for the southwestern United States (US) and quantitative or semi-quantitative records of precipitation are absent. Here we use the hydrogen isotope (δD) value of C28 n-alkanoic acid in lacustrine sediments of Pleistocene age to reconstruct δD values of precipitation in northern New Mexico over two glacial-interglacial cycles (~550,000-360,000 years before present) and obtain a record of monsoon strength. Overall, reconstructed δD values range from -53.8‰ to -94.4‰, with a mean value of -77.5 ± 8‰. Remarkably, this variation falls within the measured present-day summer monsoonal and winter weighted means (-50.3 ± 3‰ and -106.4 ± 20‰ respectively), suggesting that processes similar to those of present time also controlled precipitation during Marine Isotope Stage (MIS) 13 to 10. Using the δD summer monsoonal and winter mean values as end-members, we interpret our reconstructed δD record of precipitation as a direct, and semi-quantitative, indicator of monsoon strength during MIS 13 to 10. Interglacial periods were characterized by greater monsoon strength but also greater variability compared to glacial periods. Pronounced cycles in the strength of the monsoon occurred during interglacial periods and in general were positively correlated with maximum mean annual temperatures. Our estimates of monsoon strength are supported by independent proxies of ecosystem productivity, namely, TOC, δ13C of TOC and Si/Ti ratio and warm pollen taxa Juniperus and Quercus. Interglacial variability in the strength of the monsoon resembles a response to the land-sea surface temperature contrast (LSTC) except for the early part of MIS 11. During this period, LSTC would have remained relatively strong while monsoonal strength decreased to a minimum. This minimum occurred following the warmest interval of MIS 11, suggesting a more complex driving of monsoon strength during warm periods. In addition, this period of monsoon minimum coincided with a core section of mud-cracked sediments that suggest low monsoonal precipitation was an important factor in the onset of drought. Our estimates of monsoon strength represent a record of natural variability in the region that is relevant to present time, in particular the variability during interglacial MIS 11, which is considered an analog for the current interglacial. Our results suggest that natural variability can cause significant reductions in monsoonal precipitation with the implication of a potentially adverse effect from sustained warming. © 2014 Elsevier Ltd.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60412
Appears in Collections:过去全球变化的重建

Files in This Item:

There are no files associated with this item.


作者单位: Earth and Environmental Sciences Division, EES-14, Los Alamos National Laboratory, Los Alamos, NM, United States; Department of Geological Sciences, Brown University, Providence, RI, United States; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States; Large Lakes Observatory, University of Minnesota Duluth, Duluth, MN, United States; School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ, United States; Laboratory of Paleoecology, Bilby Research Center, Northern Arizona University, Flagstaff, AZ, United States; Department of Earth and Environmental Sciences, The University of Michigan, Ann Arbor, MI, United States; U.S.G.S. Fort Collins Science Center, Jemez Mountains Field Station, Los Alamos, NM, United States; Department of Geological Sciences, The University of Texas at Austin, Austin, TX, United States; School of Geographical and Earth Sciences, University of Glasgow, Glasgow, United Kingdom; Department of Geology and Planetary Science, University of Pittsburgh, Pittsburgh, PA, United States; University of Notre Dame, Dept. of Civil and Environmental Engineering and Earth Sciences, Notre Dame, IN, United States

Recommended Citation:
Cisneros-Dozal L.M.,Huang Y.,Heikoop J.M.,et al. Assessing the strength of the monsoon during the late Pleistocene in southwestern United States[J]. Quaternary Science Reviews,2014-01-01,103
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Cisneros-Dozal L.M.]'s Articles
[Huang Y.]'s Articles
[Heikoop J.M.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Cisneros-Dozal L.M.]'s Articles
[Huang Y.]'s Articles
[Heikoop J.M.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Cisneros-Dozal L.M.]‘s Articles
[Huang Y.]‘s Articles
[Heikoop J.M.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.