Arid
DOI10.1073/pnas.1515478113
Pedothem carbonates reveal anomalous North American atmospheric circulation 70,000-55,000 years ago
Oerter, Erik J.1,9; Sharp, Warren D.2; Oster, Jessica L.3; Ebeling, Angela4; Valley, John W.5; Kozdon, Reinhard5,10; Orland, Ian J.5,6; Hellstrom, John7; Woodhead, Jon D.7; Hergt, Janet M.7; Chadwick, Oliver A.8; Amundson, Ronald1
通讯作者Oerter, Erik J.
来源期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN0027-8424
出版年2016
卷号113期号:4页码:919-924
英文摘要

Our understanding of climatic conditions, and therefore forcing factors, in North America during the past two glacial cycles is limited in part by the scarcity of long, well-dated, continuous paleoclimate records. Here, we present the first, to our knowledge, continuous, millennial-resolution paleoclimate proxy record derived from millimeter-thick pedogenic carbonate clast coatings (pedothems), which arewidely distributed in semiarid to arid regions worldwide. Our new multiisotope pedothem record from the Wind River Basin inWyoming confirms a previously hypothesized period of increased transport of Gulf of Mexico moisture northward into the continental interior from 70,000 to 55,000 years ago based on oxygen and carbon isotopes determined by ion microprobe and uranium isotopes and U-Th dating by laser ablation inductively coupled plasma mass spectrometry. This pronounced meridional moisture transport, which contrastswith the dominant zonal transport of Pacific moisture into the North American interior by westerly winds before and after 70,000-55,000 years ago, may have resulted from a persistent anticyclone developed above the North American ice sheet during Marine Isotope Stage 4. We conclude that pedothems, when analyzed using microanalytical techniques, can provide high-resolution paleoclimate records that may open new avenues into understanding past terrestrial climates in regions where paleoclimate records are not otherwise available. When pedothem paleoclimate records are combined with existing records they will add complimentary soil-based perspectives on paleoclimate conditions.


英文关键词paleoclimate carbon oxygen uranium isotopes U-series dating pedogenic carbonate Marine Isotope Stage 4
类型Article
语种英语
国家USA ; Australia
收录类别SCI-E
WOS记录号WOS:000368617900037
WOS关键词CLUMPED ISOTOPE GEOTHERMOMETER ; LAST GLACIAL CYCLE ; SOIL CARBONATE ; DEVILS-HOLE ; PEDOGENIC CARBONATE ; CLIMATE ; RECORD ; PALEOCLIMATE ; VEGETATION ; HISTORY
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/195731
作者单位1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;
2.Berkeley Geochronol Ctr, Berkeley, CA 94709 USA;
3.Vanderbilt Univ, Dept Earth & Environm Sci, Nashville, TN 37240 USA;
4.Wisconsin Lutheran Coll, Dept Biol, Milwaukee, WI 53226 USA;
5.Univ Wisconsin, Dept Geosci, Wisconsin Secondary Ion Mass Spectrometer Lab, Madison, WI 53706 USA;
6.Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA;
7.Univ Melbourne, Sch Earth Sci, Melbourne, Vic 3099, Australia;
8.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA;
9.Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA;
10.Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
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Oerter, Erik J.,Sharp, Warren D.,Oster, Jessica L.,et al. Pedothem carbonates reveal anomalous North American atmospheric circulation 70,000-55,000 years ago[J]. University of California, Berkeley,2016,113(4):919-924.
APA Oerter, Erik J..,Sharp, Warren D..,Oster, Jessica L..,Ebeling, Angela.,Valley, John W..,...&Amundson, Ronald.(2016).Pedothem carbonates reveal anomalous North American atmospheric circulation 70,000-55,000 years ago.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,113(4),919-924.
MLA Oerter, Erik J.,et al."Pedothem carbonates reveal anomalous North American atmospheric circulation 70,000-55,000 years ago".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 113.4(2016):919-924.
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