The Response of Ice Sheets to Climate Variability

Snow, Kate, Goldberg, Dan, Holland, Paul, Jordan, Jim, Arthern, Robert and Jenkins, Adrian (2017) The Response of Ice Sheets to Climate Variability. Geophysical Research Letters, 44 (23). 11,878-11,885. ISSN 0094-8276

[img]
Preview
Text
Snow_et_al-2017-Geophysical_Research_Letters.pdf - Published Version

Download (1MB) | Preview
Official URL: https://doi.org/10.1002/2017GL075745

Abstract

West Antarctic Ice Sheet loss is a significant contributor to sea level rise. While the ice loss is thought to be triggered by fluctuations in oceanic heat at the ice shelf bases, ice sheet response to ocean variability remains poorly understood. Using a synchronously coupled ice-ocean model permitting grounding line migration, this study evaluates the response of an ice sheet to periodic variations in ocean forcing. Resulting oscillations in grounded ice volume amplitude is shown to grow as a nonlinear function of ocean forcing period. This implies that slower oscillations in climatic forcing are disproportionately important to ice sheets. The ice shelf residence time offers a critical time scale, above which the ice response amplitude is a linear function of ocean forcing period and below which it is quadratic. These results highlight the sensitivity of West Antarctic ice streams to perturbations in heat fluxes occurring at decadal time scales.

Item Type: Article
Uncontrolled Keywords: synchronous coupling; ice-ocean model; climate variability; ice sheet response
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Becky Skoyles
Date Deposited: 13 Mar 2018 11:37
Last Modified: 25 Jun 2018 18:45
URI: http://nrl.northumbria.ac.uk/id/eprint/33709

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence