Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries?

Howell, Fergus, Haywood, Alan, Dolan, Aisling, Dowsett, Harry, Francis, Jane, Hill, Daniel, Pickering, Steven, Pope, James, Salzmann, Ulrich and Wade, Bridget (2014) Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries? Geophysical Research Letters, 41 (6). pp. 2011-2018. ISSN 0094-8276

[img]
Preview
PDF (Full text)
GRL_41-6_uncertainties_sea_ice_albedo.pdf - Published Version

Download (962kB) | Preview
Official URL: http://dx.doi.org/10.1002/2013GL058872

Abstract

General Circulation Model simulations of the mid-Pliocene warm period (mPWP, 3.264 to 3.025 Myr ago) currently underestimate the level of warming that proxy data suggest existed at high latitudes, with discrepancies of up to 11°C for sea surface temperature estimates and 17°C for surface air temperature estimates. Sea ice has a strong influence on high-latitude climates, partly due to the albedo feedback. We present results demonstrating the effects of reductions in minimum sea ice albedo limits in general circulation model simulations of the mPWP. While mean annual surface air temperature increases of up to 6°C are observed in the Arctic, the maximum decrease in model-data discrepancies is just 0.81°C. Mean annual sea surface temperatures increase by up to 2°C, with a maximum model-data discrepancy improvement of 1.31°C. It is also suggested that the simulation of observed 21st century sea ice decline could be influenced by the adjustment of the sea ice albedo parameterization.

Item Type: Article
Additional Information: Published online ahead of print.
Uncontrolled Keywords: albedo, paleoclimate, modeling, Pliocene, sea ice
Subjects: F600 Geology
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Ulrich Salzmann
Date Deposited: 02 Apr 2014 07:46
Last Modified: 15 May 2017 20:28
URI: http://nrl.northumbria.ac.uk/id/eprint/16041

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