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Title: High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data

Abstract

Here, we show results from a positive degree-day (PDD) model of Greenland ice sheet (GrIS) surface mass balance (SMB), 1870–2012, forced with reanalysis data. The model includes an improved daily temperature parameterization as compared with a previous version and is run at 1 km rather than 5 km resolution. The improvements lead overall to higher SMB with the same forcing data. We also compare our model with results from two regional climate models (RCMs). While there is good qualitative agreement between our PDD model and the RCMs, it usually results in lower precipitation and lower runoff but approximately equivalent SMB: mean 1979–2012 SMB (± standard deviation), in Gt a–1, is 382 ± 78 in the PDD model, compared with 379 ± 101 and 425 ± 90 for the RCMs. Comparison with in situ SMB observations suggests that the RCMs may be more accurate than PDD at local level, in some areas, although the latter generally compares well. Dividing the GrIS into seven drainage basins we show that SMB has decreased sharply in all regions since 2000. Finally we show correlation between runoff close to two calving glaciers and either calving front retreat or calving flux, this being most noticeable frommore » the mid-1990s.« less

Authors:
 [1];  [1];  [1];  [1];  [2];  [3];  [4]
  1. Univ. of Sheffield, Sheffield (United Kingdom)
  2. Utrecht Univ., Utrecht (The Netherlands)
  3. Univ. of Liege, Liege (Belgium)
  4. Vrije Univ. Brussel, Brussels (Belgium)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Univ. of Sheffield, Sheffield (United Kingdom)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1358439
Grant/Contract Number:  
SC0009988
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Glaciology
Additional Journal Information:
Journal Volume: 63; Journal Issue: 237; Journal ID: ISSN 0022-1430
Publisher:
International Glaciological Society
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; arctic glaciology; ice-sheet mass balance; bass-balance reconstruction

Citation Formats

Wilton, David J., Jowett, Amy, Hanna, Edward, Bigg, Grant R., Van Den Broeke, Michiel R., Fettweis, Xavier, and Huybrechts, Philippe. High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data. United States: N. p., 2016. Web. doi:10.1017/jog.2016.133.
Wilton, David J., Jowett, Amy, Hanna, Edward, Bigg, Grant R., Van Den Broeke, Michiel R., Fettweis, Xavier, & Huybrechts, Philippe. High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data. United States. https://doi.org/10.1017/jog.2016.133
Wilton, David J., Jowett, Amy, Hanna, Edward, Bigg, Grant R., Van Den Broeke, Michiel R., Fettweis, Xavier, and Huybrechts, Philippe. 2016. "High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data". United States. https://doi.org/10.1017/jog.2016.133. https://www.osti.gov/servlets/purl/1358439.
@article{osti_1358439,
title = {High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data},
author = {Wilton, David J. and Jowett, Amy and Hanna, Edward and Bigg, Grant R. and Van Den Broeke, Michiel R. and Fettweis, Xavier and Huybrechts, Philippe},
abstractNote = {Here, we show results from a positive degree-day (PDD) model of Greenland ice sheet (GrIS) surface mass balance (SMB), 1870–2012, forced with reanalysis data. The model includes an improved daily temperature parameterization as compared with a previous version and is run at 1 km rather than 5 km resolution. The improvements lead overall to higher SMB with the same forcing data. We also compare our model with results from two regional climate models (RCMs). While there is good qualitative agreement between our PDD model and the RCMs, it usually results in lower precipitation and lower runoff but approximately equivalent SMB: mean 1979–2012 SMB (± standard deviation), in Gt a–1, is 382 ± 78 in the PDD model, compared with 379 ± 101 and 425 ± 90 for the RCMs. Comparison with in situ SMB observations suggests that the RCMs may be more accurate than PDD at local level, in some areas, although the latter generally compares well. Dividing the GrIS into seven drainage basins we show that SMB has decreased sharply in all regions since 2000. Finally we show correlation between runoff close to two calving glaciers and either calving front retreat or calving flux, this being most noticeable from the mid-1990s.},
doi = {10.1017/jog.2016.133},
url = {https://www.osti.gov/biblio/1358439}, journal = {Journal of Glaciology},
issn = {0022-1430},
number = 237,
volume = 63,
place = {United States},
year = {2016},
month = {12}
}

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Cited by: 4 works
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Works referenced in this record:

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journal, October 2015


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journal, November 2013


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journal, November 2003


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journal, December 2011


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journal, June 2014


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journal, October 2012


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journal, October 2012


Scatter of mass changes estimates at basin scale for Greenland and Antarctica
journal, January 2013


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journal, December 2011


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journal, January 2005


Greenland surface mass-balance observations from the ice-sheet ablation area and local glaciers
journal, July 2016


The ERA-Interim reanalysis: configuration and performance of the data assimilation system
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Works referencing / citing this record:

Greenland Ice Sheet Surface Mass Loss: Recent Developments in Observation and Modeling
journal, November 2017


Estimating Greenland surface melt is hampered by melt induced dampening of temperature variability
journal, March 2018


A simple physics-based improvement to the positive degree day model
journal, July 2018


Evaluation of Reconstructions of Snow/Ice Melt in Greenland by Regional Atmospheric Climate Models Using Laser Altimetry Data
journal, August 2018


Interannual Variability of Atmospheric Conditions and Surface Melt in Greenland in 2000–2014
journal, September 2018


Atmospheric River Impacts on Greenland Ice Sheet Surface Mass Balance
journal, August 2018


Space‐Time Evolution of Greenland Ice Sheet Elevation and Mass From Envisat and GRACE Data
journal, August 2019


Linear response of east Greenland’s tidewater glaciers to ocean/atmosphere warming
journal, July 2018


The Influence of Hydrology on the Dynamics of Land-Terminating Sectors of the Greenland Ice Sheet
journal, February 2019


The Case for a Sustained Greenland Ice Sheet-Ocean Observing System (GrIOOS)
journal, March 2019


Extreme temperature events on Greenland in observations and the MAR regional climate model
journal, January 2018


Brief communication: An ice surface melt scheme including the diurnal cycle of solar radiation
journal, January 2018


Modelling the climate and surface mass balance of polar ice sheets using RACMO2 – Part 1: Greenland (1958–2016)
journal, January 2018


Surface mass balance downscaling through elevation classes in an Earth system model: application to the Greenland ice sheet
journal, January 2019