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|a Departures from eustasy in Pliocene sea-level records |h [electronic resource]. |
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|a [S.l.] : |b Macmillan Publishers Limited, |c 2011. |
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|a Nature Geoscience |b Articles. |
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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 Proxy data suggest that atmospheric CO2 levels during the middle of the Pliocene epoch (about 3 Myr ago) were similar to
today, leading to the use of this interval as a potential analogue for future climate change. Estimates for mid-Pliocene sea
levels range from 10 to 40m above present, and a value of C25m is often adopted in numerical climate model simulations.
A eustatic change of such magnitude implies the complete deglaciation of the West Antarctic and Greenland ice sheets,
and significant loss of mass in the East Antarctic ice sheet. However, the effects of glacial isostatic adjustments have not
been accounted for in Pliocene sea-level reconstructions. Here we numerically model these effects on Pliocene shoreline
features using a gravitationally self-consistent treatment of post-glacial sea-level change.We find that the predicted modern
elevation of Pliocene shoreline features can deviate significantly from the eustatic signal, even in the absence of subsequent
tectonically-driven movements of the Earth’s surface. In our simulations, this non-eustatic sea-level change, at individual
locations, is caused primarily by residual isostatic adjustments associated with late Pleistocene glaciation. We conclude that
a combination of model results and field observations can help to better constrain sea level in the past, and hence lend insight
into the stability of ice sheets under varying climate conditions. |
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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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|t Departures from eustasy in Pliocene sea-level records |
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|a dpSobek |c Sea Level Rise |
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|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15061807/00001 |y Click here for full text |
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|3 Host material |u http://www.nature.com/ngeo/journal/v4/n5/full/ngeo1118.html |y Departures from eustasy in Pliocene sea-level records |
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|a http://dpanther.fiu.edu/sobek/content/FI/15/06/18/07/00001/Raymo et al_2011_Departures from eustasy in Pliocene sea-level recordsthm.jpg |
