Sea-level feedback lowers projections of future Antarctic Ice-Sheet mass loss

Gomez, Natalya; Pollard, David; Holland, David

doi:10.1038/ncomms9798

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Sea-level feedback lowers projections of future Antarctic Ice-Sheet mass loss

2015
By Gomez, Natalya ; Pollard, David ; Holland, David
Source: Nat Commun. 2015; 6: 8798.

[PDF-973.17 KB]

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Journal Title:

Nature Communications
Personal Author:

Gomez, Natalya ; Pollard, David ; Holland, David

Gomez, Natalya ; Pollard, David ; Holland, David Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

The stability of marine sectors of the Antarctic Ice Sheet (AIS) in a warming climate has been identified as the largest source of uncertainty in projections of future sea-level rise. Sea-level fall near the grounding line of a retreating marine ice sheet has a stabilizing influence on the ice sheets, and previous studies have established the importance of this feedback on ice age AIS evolution. Here we use a coupled ice sheet–sea-level model to investigate the impact of the feedback mechanism on future AIS retreat over centennial and millennial timescales for a range of emission scenarios. We show that the combination of bedrock uplift and sea-surface drop associated with ice-sheet retreat significantly reduces AIS mass loss relative to a simulation without these effects included. Sensitivity analyses show that the stabilization tends to be greatest for lower emission scenarios and Earth models characterized by a thin elastic lithosphere and low-viscosity upper mantle, as is the case for West Antarctica.
Keywords:

[+]

Ice Sheets Sea Level
Source:

Nat Commun. 2015; 6: 8798.
DOI:

https://dx.doi.org/10.1038/ncomms9798
Pubmed ID:

26554381
Pubmed Central ID:

PMC5426515
Document Type:

Journal Article
Funding:

Grant no. NA13OAR4310100
Place as Subject:

Antarctica
Rights Information:

CC BY
Compliance:

PMC
Main Document Checksum:

[+]

urn:sha256:d32a5f0b362c8b318d2595049f1f1e3aaa2d8deba84d07e108aef62ccca3f39a
Download URL:

https://repository.library.noaa.gov/view/noaa/27626/noaa_27626_DS1.pdf
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Sea-level feedback lowers projections of future Antarctic Ice-Sheet mass loss

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