Antarctic Ice Sheet Elevation Impacts on Water Isotope Records During the Last Interglacial ...

AbstractChanges of the topography of the Antarctic Ice Sheet (AIS) can complicate the interpretation of ice core water stable isotope measurements in terms of temperature. Here, we use a set of idealized AIS elevation change scenarios to investigate this for the warm Last Interglacial (LIG). We show...

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Bibliographic Details
Main Authors: Goursaud, S, Holloway, M, Sime, L, Wolff, E, Valdes, P, Steig, EJ, Pauling, A
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union (AGU) 2021
Subjects:
climate modeling
effect of the elevation
Last Interglacial
water stable isotopes
Antarctic
Talos Dome
The Antarctic
Antarc*
Antarctica
ice core
Ice Sheet
Sea ice
Online Access:https://dx.doi.org/10.17863/cam.65565
https://www.repository.cam.ac.uk/handle/1810/318451
Description
Summary:AbstractChanges of the topography of the Antarctic Ice Sheet (AIS) can complicate the interpretation of ice core water stable isotope measurements in terms of temperature. Here, we use a set of idealized AIS elevation change scenarios to investigate this for the warm Last Interglacial (LIG). We show that LIG δ 18 O against elevation relationships is not uniform across Antarctica and that the LIG response to elevation is lower than the preindustrial response. The effect of LIG elevation‐induced sea ice changes on δ 18 O is small, allowing us to isolate the effect of elevation change alone. Our results help to define the effect of AIS changes on the LIG δ 18 O signals and should be invaluable to those seeking to use AIS ice core measurements for these purposes. Especially, our simulations strengthen the conclusion that ice core measurements from the Talos Dome core exclude the loss of the Wilkes Basin at around 128 kyr. ...

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