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|a The Role of Ocean Thermal Expansion in Last Interglacial Sea Level Rise |h [electronic resource]. |
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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 A compilation of paleoceanographic data and a coupled atmosphere-ocean climate model
were used to examine global ocean surface temperatures of the Last Interglacial (LIG) period,
and to produce the first quantitative estimate of the role that ocean thermal expansion likely
played in driving sea level rise above present day during the LIG. Our analysis of the
paleoclimatic data suggests a peak LIG global sea surface temperature (SST) warming of
0.7±0.6°C compared to the late Holocene. Our LIG climate model simulation suggests a slight
cooling of global average SST relative to preindustrial conditions (ΔSST = -0.4°C), with a
reduction in atmospheric water vapor in the Southern Hemisphere driven by a northward shift of
the Intertropical Convergence Zone, and substantially reduced seasonality in the Southern
Hemisphere. Taken together, the model and paleoceanographic data imply a minimal
contribution of ocean thermal expansion to LIG sea level rise above present day. Uncertainty
remains, but it seems unlikely that thermosteric sea level rise exceeded 0.4±0.3 m during the
LIG. This constraint, along with estimates of the sea level contributions from the Greenland Ice
Sheet, glaciers and ice caps, implies that 4.1 to 5.8 m of sea level rise during the Last Interglacial
period was derived from the Antarctic Ice Sheet. These results reemphasize the concern that both
the Antarctic and Greenland Ice Sheets may be more sensitive to temperature than widely
thought. |
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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 Overpeck, Jonathan T.. |
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|a Otto-Bliesner, Bette L.. |
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|t The Role of Ocean Thermal Expansion in Last Interglacial Sea Level Rise |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061870/00001 |y Click here for full text |
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|3 Host material |u http://onlinelibrary.wiley.com/doi/10.1029/2011GL048280/abstract |y The Role of Ocean Thermal Expansion in Last Interglacial Sea Level Rise |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/18/70/00001/FI15061870thm.jpg |
