气候变化领域集成服务门户(CCPortal): Latitudinal gradients in greenhouse seawater δ18O: Evidence from eocene sirenian tooth enamel

CCPortal

DOI	10.1126/science.1201182
	Latitudinal gradients in greenhouse seawater δ18O: Evidence from eocene sirenian tooth enamel
	Clementz M.T.; Sewall J.O.
发表日期	2011
ISSN	0036-8075
起始页码	455
结束页码	458
卷号	332 期号:6028
英文摘要	The Eocene greenhouse climate state has been linked to a more vigorous hydrologic cycle at mid- and high latitudes; similar information on precipitation levels at low latitudes is, however, limited. Oxygen isotopic fluxes track moisture fluxes and, thus, the δ18O values of ocean surface waters can provide insight into hydrologic cycle changes. The offset between tropical δ18O values from sampled Eocene sirenian tooth enamel and modern surface waters is greater than the expected 1.0 per mil increase due to increased continental ice volume. This increased offset could result from suppression of surface-water δ18O values by a tropical, annual moisture balance substantially wetter than that of today. Results from an atmospheric general circulation model support this interpretation and suggest that Eocene low latitudes were extremely wet.
英文关键词	oxygen 18; atmospheric general circulation model; enamel; Eocene; greenhouse effect; hydrological cycle; latitudinal gradient; moisture flux; oxygen isotope; paleoclimate; precipitation (climatology); seawater; sirenian; surface water; article; atmosphere; climate; continental ice; enamel; Eocene; fossil; greenhouse; latitude; moisture; precipitation; priority journal; sea surface waters; water cycle; Animals; Dental Enamel; Dugong; Fossils; Geography; Greenhouse Effect; Humidity; Oceans and Seas; Oxygen Isotopes; Seawater; Steam; Temperature; Trichechus; Tropical Climate; Water Cycle; Sirenia
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243347
作者单位	Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States; Program in Ecology, University of Wyoming, Laramie, WY 82071, United States; Department of Physical Sciences, Kutztown University, Kutztown, PA 19530, United States
推荐引用方式 GB/T 7714	Clementz M.T.,Sewall J.O.. Latitudinal gradients in greenhouse seawater δ18O: Evidence from eocene sirenian tooth enamel[J],2011,332(6028).
APA	Clementz M.T.,&Sewall J.O..(2011).Latitudinal gradients in greenhouse seawater δ18O: Evidence from eocene sirenian tooth enamel.Science,332(6028).
MLA	Clementz M.T.,et al."Latitudinal gradients in greenhouse seawater δ18O: Evidence from eocene sirenian tooth enamel".Science 332.6028(2011).