High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data
ABSTRACT 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...
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Language: | English |
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Cambridge University Press (CUP)
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Online Access: | http://dx.doi.org/10.1017/jog.2016.133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016001337 |
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crcambridgeupr:10.1017/jog.2016.133 2024-03-03T08:44:58+00:00 High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data WILTON, DAVID J. JOWETT, AMY HANNA, EDWARD BIGG, GRANT R. VAN DEN BROEKE, MICHIEL R. FETTWEIS, XAVIER HUYBRECHTS, PHILIPPE 2016 http://dx.doi.org/10.1017/jog.2016.133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016001337 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 63, issue 237, page 176-193 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2016 crcambridgeupr https://doi.org/10.1017/jog.2016.133 2024-02-08T08:31:31Z ABSTRACT 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. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Greenland Journal of Glaciology 63 237 176 193 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes 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 |
topic_facet |
Earth-Surface Processes |
description |
ABSTRACT 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. |
format |
Article in Journal/Newspaper |
author |
WILTON, DAVID J. JOWETT, AMY HANNA, EDWARD BIGG, GRANT R. VAN DEN BROEKE, MICHIEL R. FETTWEIS, XAVIER HUYBRECHTS, PHILIPPE |
author_facet |
WILTON, DAVID J. JOWETT, AMY HANNA, EDWARD BIGG, GRANT R. VAN DEN BROEKE, MICHIEL R. FETTWEIS, XAVIER HUYBRECHTS, PHILIPPE |
author_sort |
WILTON, DAVID J. |
title |
High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
title_short |
High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
title_full |
High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
title_fullStr |
High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
title_full_unstemmed |
High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
title_sort |
high resolution (1 km) positive degree-day modelling of greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.1017/jog.2016.133 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143016001337 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 63, issue 237, page 176-193 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2016.133 |
container_title |
Journal of Glaciology |
container_volume |
63 |
container_issue |
237 |
container_start_page |
176 |
op_container_end_page |
193 |
_version_ |
1792500498105892864 |