globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.11.052
论文题名:
Middle to Late Jurassic equatorial seawater temperatures and latitudinal temperature gradients based on stable isotopes of brachiopods and oysters from Gebel Maghara, Egypt
作者: Alberti M.; Fürsich F.T.; Abdelhady A.A.; Andersen N.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 468
起始页码: 301
结束页码: 313
语种: 英语
英文关键词: Egypt ; Jurassic ; Latitudinal temperature gradient ; Palaeoclimate ; Seasonality ; Stable isotope analyses
英文摘要: Stable isotope (δ18O, δ13C) analyses of brachiopod and oyster shells from the Gebel Maghara, Egypt, were used to reconstruct the first detailed dataset on peri-equatorial water temperatures during the Middle to Late Jurassic. Throughout this time interval, temperatures remained relatively constant around an average of 25.7 °C. Slightly warmer conditions existed in the Early Bathonian (~ 27.0 °C), while the Kimmeridgian shows the lowest temperatures (~ 24.3 °C). As expected for a tropical palaeolatitude, the seasonality was very low (< 2 °C) as reconstructed by high-resolution stable isotope analyses of two oyster shells. Latitudinal temperature gradients in the Middle Jurassic were much steeper than previously expected and comparable to today. During the Kimmeridgian (Late Jurassic), temperatures in Europe were generally warmer leading to weaker latitudinal gradients. On average, water temperatures reconstructed from stable isotopes for Jurassic localities above the thermocline are lower than Recent sea-surface temperatures (based on currently used estimates for the δ18O value of seawater). © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67969
Appears in Collections:过去全球变化的重建

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作者单位: Institut für Geowissenschaften, Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Straße 10, Kiel, Germany; Department of Geology, University of Rajasthan, Jaipur, India; GeoZentrum Nordbayern, Fachgruppe PaläoUmwelt, Friedrich-Alexander-Universität Erlangen-Nürnberg, Loewenichstraße 28, Erlangen, Germany; Geology Department, Faculty of Science, Minia University, Minia, Egypt; Leibniz Laboratory for Radiometric Dating and Stable Isotope Research, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straße 11, Kiel, Germany

Recommended Citation:
Alberti M.,Fürsich F.T.,Abdelhady A.A.,et al. Middle to Late Jurassic equatorial seawater temperatures and latitudinal temperature gradients based on stable isotopes of brachiopods and oysters from Gebel Maghara, Egypt[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,468
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