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      Some new acritarch species from the lower and middle Miocene of the Porcupine Basin, North Atlantic Ocean: biostratigraphy and palaeoecology

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      Palynology
      Informa UK Limited

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          Unlocking the Ice House: Oligocene-Miocene oxygen isotopes, eustasy, and margin erosion

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            Middle Miocene Southern Ocean cooling and Antarctic cryosphere expansion.

            Magnesium/calcium data from Southern Ocean planktonic foraminifera demonstrate that high-latitude (approximately 55 degrees S) southwest Pacific sea surface temperatures (SSTs) cooled 6 degrees to 7 degrees C during the middle Miocene climate transition (14.2 to 13.8 million years ago). Stepwise surface cooling is paced by eccentricity forcing and precedes Antarctic cryosphere expansion by approximately 60 thousand years, suggesting the involvement of additional feedbacks during this interval of inferred low-atmospheric partial pressure of CO2 (pCO2). Comparing SSTs and global carbon cycling proxies challenges the notion that episodic pCO2 drawdown drove this major Cenozoic climate transition. SST, salinity, and ice-volume trends suggest instead that orbitally paced ocean circulation changes altered meridional heat/vapor transport, triggering ice growth and global cooling.
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              Drilling and Dating New Jersey Oligocene-Miocene Sequences: Ice Volume, Global Sea Level, and Exxon Records

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                Author and article information

                Journal
                Palynology
                Palynology
                Informa UK Limited
                0191-6122
                1558-9188
                September 22 2014
                September 15 2014
                : 39
                : 1
                : 37-55
                Article
                10.1080/01916122.2014.933749
                f244c562-fd52-402a-a9ab-2bc0586b76c2
                © 2014
                History

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