| 008 |
|
150731n^^^^^^^^xx^||||^o^^^^^|||^u^eng^d |
| 245 |
00 |
|a Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |h [electronic resource] |y English. |
| 260 |
|
|a [S.l.] : |b Macmillan Publishers Limited, |c 2013. |
| 490 |
|
|a Nature Geoscience |y English. |
| 506 |
|
|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. |
| 520 |
3 |
|a Warm intervals within the Pliocene epoch (5.33–2.58 million
years ago) were characterized by global temperatures comparable
to those predicted for the end of this century1 and
atmospheric CO2 concentrations similar to today2–4. Estimates
for global sea level highstands during these times5 imply
possible retreat of the East Antarctic ice sheet, but ice-proximal
evidence from the Antarctic margin is scarce. Here we present
new data from Pliocene marine sediments recovered offshore
of Adélie Land, East Antarctica, that reveal dynamic behaviour
of the East Antarctic ice sheet in the vicinity of the low-lying
Wilkes Subglacial Basin during times of past climatic warmth.
Sedimentary sequences deposited between 5.3 and 3.3 million
years ago indicate increases in Southern Ocean surface
water productivity, associated with elevated circum-Antarctic
temperatures. The geochemical provenance of detrital material
deposited during these warm intervals suggests active erosion
of continental bedrock from within theWilkes Subglacial Basin,
an area today buried beneath the East Antarctic ice sheet.
We interpret this erosion to be associated with retreat of the
ice sheet margin several hundreds of kilometres inland and
conclude that the East Antarctic ice sheet was sensitive to
climatic warmth during the Pliocene. |
| 533 |
|
|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. |
| 852 |
|
|a dpSobek |c Sea Level Rise |
| 856 |
40 |
|u http://dpanther.fiu.edu/dpService/dpPurlService/purl/FI15062156/00001 |y Click here for full text |
| 992 |
04 |
|a http://dpanther.fiu.edu/sobek/content/FI/15/06/21/56/00001/FI15062156_thm.jpg |
