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Surface mass balance contributions to acceleration of Antarctic ice mass loss during 2003-2013

Seo, Ki-Weon and Wilson, Clark R. and Scambos, Ted and Kim, Baek-Min and Waliser, Duane E. and Tian, Baijun and Kim, Byeong-Hoon and Eom, Jooyoung (2015) Surface mass balance contributions to acceleration of Antarctic ice mass loss during 2003-2013. Journal of Geophysical Research: Solid Earth, 120 (5). pp. 3617-3627. ISSN 0148-0227. https://resolver.caltech.edu/CaltechAUTHORS:20161011-082857353

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Abstract

Recent observations from satellite gravimetry (the Gravity Recovery and Climate Experiment (GRACE) mission) suggest an acceleration of ice mass loss from the Antarctic Ice Sheet (AIS). The contribution of surface mass balance changes (due to variable precipitation) is compared with GRACE-derived mass loss acceleration by assessing the estimated contribution of snow mass from meteorological reanalysis data. We find that over much of the continent, the acceleration can be explained by precipitation anomalies. However, on the Antarctic Peninsula and other parts of West Antarctica, mass changes are not explained by precipitation and are likely associated with ice discharge rate increases. The total apparent GRACE acceleration over all of the AIS between 2003 and 2013 is −13.6 ± 7.2 Gt/yr^2. Of this total, we find that the surface mass balance component is −8.2 ± 2.0 Gt/yr^2. However, the GRACE estimate appears to contain errors arising from the atmospheric pressure fields used to remove air mass effects. The estimated acceleration error from this effect is about 9.8 ± 5.8 Gt/yr^2. Correcting for this yields an ice discharge acceleration of −15.1 ± 6.5 Gt/yr^2.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/2014JB011755DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/2014JB011755/abstractPublisherArticle
Additional Information:©2015. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. Received 9 Nov 2014. Accepted 10 Apr 2015. Accepted article online 14 Apr 2015. Published online 12 May 2015. This work was supported by National Research Foundation grant NRF-2013R1A1A2008368 and Korea Polar Research Institute research grant PM14020. D.W. and B.T.'s contributions were carried out on behalf of the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. GRACE, ERA Interim, MERRA, and NCEP/DOE data are available from GRACE Tellus site (http://grace.jpl.nasa.gov), ECMWF data server (http://data-portal.ecmwf.int), Goddard Earth Sciences Data and Information Services Center (http://disc.sci.gsfc.nasa.gov), and Earth System Research Laboratory (http://www.esrl.noaa.gov), respectively. RACMO2.3 data are available upon request in Institute for Marine and Atmospheric Research Utrecht (http://www.projects.science.uu.nl/iceclimate/models/antarctica.php)
Funders:
Funding AgencyGrant Number
National Research Foundation of Korea (NRF)2013R1A1A2008368
Polar Research Institute (Korea)PM14020
NASA/JPL/CaltechUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20161011-082857353
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20161011-082857353
Official Citation:Seo, K.-W., C. R. Wilson, T. Scambos, B.-M. Kim, D. E. Waliser, B. Tian, B.-H. Kim, and J. Eom (2015), Surface mass balance contributions to acceleration of Antarctic ice mass loss during 2003–2013. J. Geophys. Res. Solid Earth, 120, 3617–3627. doi: 10.1002/2014JB011755.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:70992
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:11 Oct 2016 20:39
Last Modified:03 Oct 2019 16:03

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