High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data
peer reviewed 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...
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International Glaciological Society
2017
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Online Access: | https://orbi.uliege.be/handle/2268/204508 https://orbi.uliege.be/bitstream/2268/204508/1/div-class-title-high-resolution-1-km-positive-degree-day-modelling-of-greenland-ice-sheet-surface-mass-balance-1870-2012-using-reanalysis-data-div.pdf https://doi.org/10.1017/jog.2016.133 |
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ftorbi:oai:orbi.ulg.ac.be:2268/204508 2024-10-13T14:07:42+00:00 High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data Wilton, D. Jowett, A. Hanna, E. Bigg, G. van den Broeke, M. Fettweis, Xavier Huybrechts, P. 2017 https://orbi.uliege.be/handle/2268/204508 https://orbi.uliege.be/bitstream/2268/204508/1/div-class-title-high-resolution-1-km-positive-degree-day-modelling-of-greenland-ice-sheet-surface-mass-balance-1870-2012-using-reanalysis-data-div.pdf https://doi.org/10.1017/jog.2016.133 en eng International Glaciological Society https://www.cambridge.org/core/journals/journal-of-glaciology/article/div-classtitlehigh-resolution-1-km-positive-degree-day-modelling-of-greenland-ice-sheet-surface-mass-balance-18702012-using-reanalysis-datadiv/13075B993455F3EBF3C9671E507CE51A urn:issn:0022-1430 urn:issn:1727-5652 https://orbi.uliege.be/handle/2268/204508 info:hdl:2268/204508 doi:10.1017/jog.2016.133 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Journal of Glaciology, 63 (2017) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2017 ftorbi https://doi.org/10.1017/jog.2016.133 2024-09-30T14:23:32Z peer reviewed 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 University of Liège: ORBi (Open Repository and Bibliography) Greenland Journal of Glaciology 63 237 176 193 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Wilton, D. Jowett, A. Hanna, E. Bigg, G. van den Broeke, M. Fettweis, Xavier Huybrechts, P. High resolution (1 km) positive degree-day modelling of Greenland ice sheet surface mass balance, 1870–2012 using reanalysis data |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed 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, D. Jowett, A. Hanna, E. Bigg, G. van den Broeke, M. Fettweis, Xavier Huybrechts, P. |
author_facet |
Wilton, D. Jowett, A. Hanna, E. Bigg, G. van den Broeke, M. Fettweis, Xavier Huybrechts, P. |
author_sort |
Wilton, D. |
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 |
International Glaciological Society |
publishDate |
2017 |
url |
https://orbi.uliege.be/handle/2268/204508 https://orbi.uliege.be/bitstream/2268/204508/1/div-class-title-high-resolution-1-km-positive-degree-day-modelling-of-greenland-ice-sheet-surface-mass-balance-1870-2012-using-reanalysis-data-div.pdf https://doi.org/10.1017/jog.2016.133 |
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, 63 (2017) |
op_relation |
https://www.cambridge.org/core/journals/journal-of-glaciology/article/div-classtitlehigh-resolution-1-km-positive-degree-day-modelling-of-greenland-ice-sheet-surface-mass-balance-18702012-using-reanalysis-datadiv/13075B993455F3EBF3C9671E507CE51A urn:issn:0022-1430 urn:issn:1727-5652 https://orbi.uliege.be/handle/2268/204508 info:hdl:2268/204508 doi:10.1017/jog.2016.133 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
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_ |
1812814223836708864 |