globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.12.008
论文题名:
Paleohydrologic response to continental warming during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming
作者: Kraus M.J.; McInerney F.A.; Wing S.L.; Secord R.; Baczynski A.A.; Bloch J.I.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 370
起始页码: 196
结束页码: 208
语种: 英语
英文关键词: Global warming ; Paleoclimate ; Paleosol ; PETM ; Precipitation
英文摘要: Geologically rapid global warming occurred during the Paleocene-Eocene Thermal Maximum (PETM) ~56Ma. Several studies have argued that important changes occurred in the hydrological cycle during the PETM, but results have been inconsistent, ranging from global increases in humidity to drier conditions. Changes in paleosols during the PETM in the southeastern Bighorn Basin document major drying during the body of the event. Paleosol changes also suggest transitional episodes of climate change that both preceded and followed the PETM. Qualitative, semi-quantitative, and fully quantitative analyses of a ~70m thick interval of paleosols provide a high-resolution record of changes in soil moisture and precipitation. Those changes are compared to changes in temperature determined from δ18O values of tooth enamel from the mammal Coryphodon. A distinct shift to drier soils occurred just prior to the PETM, a conclusion that is consistent with previous observations that warming began before the onset of the negative carbon isotope excursion associated with the PETM. Paleosols show a progressive drying trend into the lower part of the PETM and become even drier in the upper part of the body of the PETM. Purple-red paleosols that appear during the recovery phase of the PETM indicate wetter soils, although they are better drained than paleosols below the onset. The purple-red paleosols continue for ~15m above the recovery and indicate that wetter soil conditions persisted after the recovery. It is not clear whether changes in the paleosols that preceded and followed the PETM reflect global forcing factors like orbital cycles or release of carbon that lacks an isotopic label; however, such mechanisms would provide a unifying explanation for shifts seen in continental and marine environments. © 2012 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69864
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: Department of Geological Sciences, University of Colorado, Boulder, CO 80309, United States; Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL 60208, United States; Department of Paleobiology, Smithsonian Institution, Washington, D.C. 20560, United States; Department of Earth and Atmospheric Sciences, University of Nebraska, Lincoln, NE 68588, United States; Florida Museum of Natural History, University of Florida, Gainesville, FL 32611, United States; School of Earth and Environmental Sciences, University of Adelaide, SA 5005, Australia

Recommended Citation:
Kraus M.J.,McInerney F.A.,Wing S.L.,et al. Paleohydrologic response to continental warming during the Paleocene-Eocene Thermal Maximum, Bighorn Basin, Wyoming[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,370
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Kraus M.J.]'s Articles
[McInerney F.A.]'s Articles
[Wing S.L.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Kraus M.J.]'s Articles
[McInerney F.A.]'s Articles
[Wing S.L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Kraus M.J.]‘s Articles
[McInerney F.A.]‘s Articles
[Wing S.L.]‘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.