Very high Middle Miocene surface productivity on the U.S. mid-Atlantic shelf amid glacioeustatic sea level variability
Very high Middle Miocene surface productivity on the U.S. mid-Atlantic shelf amid glacioeustatic sea level variability
复制标题
在冰川海平面变化的情况下,美国大西洋中部大陆架的中中新世表面生产力非常高
DOI:
10.1016/j.palaeo.2022.111249
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Herbert, Timothy D.
中科院分区:
文献类型:
--
作者:
Robinson, Marci M.;Dowsett, Harry J.;Herbert, Timothy D.
The Miocene Climatic Optimum (MCO) provides important insights into how the climate system operates under elevated temperatures and atmospheric CO2levels. Few western North Atlantic paleotemperature or paleoecological records exist from the MCO, despite their importance for understanding both regional and global climate dynamics. Here we present quantitative MCO paleoecological data from the western North Atlantic, specifically from the Baltimore Gas & Electric (BG&E) marine sediment core from southern Maryland, USA. We examine alkenones and planktic foraminifera and document the first sea surface temperature (SST) and productivity estimates for the MCO and the Middle Miocene Climate Transition (MMCT) from the continental shelf. Increased levels of planktic foraminifer species diversity and surface productivity accompany high sea level intervals of the MCO, indicating coastal upwelling. Cooling episodes correlate to unconformities in the BG&E core that reflect sea level lowstands; these and sedimentary cycles tie the record to eccentricity-paced Antarctic ice sheet growth and decay. This dynamic record not only captures the variability in SST, sea level and coastal productivity during the warm MCO and the transition to cooler global temperatures during the MMCT, but it also demonstrates the variability in local conditions within and between intervals of high sea level.
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DOI:
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发表时间:
2017
期刊:
影响因子:
--
作者:
R. Weems;L. Edwards;Bryan D. Landacre
通讯作者:
Bryan D. Landacre
DOI:
--
发表时间:
1994
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--
作者:
T. G. Gibson;G. W. Andrews
通讯作者:
G. W. Andrews
DOI:
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发表时间:
1978
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作者:
G. W. Andrews
通讯作者:
G. W. Andrews
DOI:
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发表时间:
2007
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影响因子:
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作者:
R. Weems;L. Edwards
通讯作者:
L. Edwards
DOI:
--
发表时间:
2018
期刊:
Smithsonian Contributions to Paleobiology
影响因子:
--
作者:
S. J. Godfrey;G. Carnevale;D. Domning;R. Eshelman;Bretton W. Kent;P. Vogt;R. Weems;D. Ward
通讯作者:
D. Ward