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|a Deep-Sea Temperature and Ice Volume Changes Across the Pliocene-Pleistocene Climate Transitions |h [electronic resource]. |
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|a [S.l.] : |b American Association for the Advancement of Science, |c 2009-07-17. |
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|a Please contact the owning institution for licensing and permissions. It is the user's responsibility to ensure use does not violate any third party rights. |
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|a Earth has undergone profound changes since the late Pliocene, which led to the development
[~2.7 million years ago (Ma)] and intensification (~0.9 Ma) of large-scale Northern Hemisphere ice
sheets, recorded as transitions in the benthic foraminiferal oxygen isotope (d18Ob) record. Here
we present an orbitally resolved record of deep ocean temperature derived from benthic
foraminiferal magnesium/calcium ratios from the North Atlantic, which shows that temperature
variations are a substantial portion of the global d18Ob signal. The record shows two distinct
cooling events associated with the late Pliocene (LPT, 2.5 to 3 Ma) and mid-Pleistocene (MPT, 1.2
to 0.85 Ma) climate transitions. Whereas the LPT increase in ice volume is attributed directly to
global cooling, the shift to 100,000-year cycles at the MPT is more likely to be a response to an
additional change in ice-sheet dynamics. |
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|a Electronic reproduction. |c Florida International University, |d 2015. |f (dpSobek) |n Mode of access: World Wide Web. |n System requirements: Internet connectivity; Web browser software. |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15042587/00001 |y Click here for full text |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/04/25/87/00001/FI15042587_thm.jpg |
