GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet
Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since the end of the 1990s due to an increase in meltwater runoff and that this trend will accelerate in the future. However, large uncertainties remain, partly due to different approaches for...
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Online Access: | https://hdl.handle.net/11250/2721735 https://doi.org/10.5194/tc-14-3935-2020 |
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fthsvestlandet:oai:hvlopen.brage.unit.no:11250/2721735 2024-03-03T08:44:58+00:00 GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet Fettweis, Xavier Hofer, Stefan Krebs-Kanzow, Uta Amory, Charles Aoki, Teruo Berends, Constantijn J. Born, Andreas Box, Jason E. Delhasse, Alison Fujita, Koji Gierz, Paul Goelzer, Heiko Hanna, Edward Hashimoto, Akihiro Huybrechts, Philippe Kapsch, Marie-Luise King, Michaela D. Kittel, Christoph Lang, Charlotte Langen, Peter L. Lenaerts, Jan T.M. Liston, Glen E. Lohmann, Gerrit Mernild, Jacob Sebastian Haugaard Mikolajewicz, Uwe Modali, Kameswarrao Mottram, Ruth H. Niwano, Masashi Noël, Brice Ryan, Jonathan C. Smith, Amy Streffing, Jan Tedesco, Marco Van de Berg, Willem Jan Van den Broeke, Michiel Van de Wal, Rodecrick S. Von Kampenhout, Leo Wilton, David Wouters, Bert Ziemen, Florian Zolles, Tobias Greenland 2020 application/pdf https://hdl.handle.net/11250/2721735 https://doi.org/10.5194/tc-14-3935-2020 eng eng European Geosciences Union EC/H2020/869304 Fettweis, X., Hofer, S., Krebs-Kanzow, U., Amory, C., Aoki, T., Berends, C. J., … Zolles, T. (2020). GrSMBMIP: Intercomparison of the modelled 1980–2012 surface mass balance over the Greenland Ice Sheet. The Cryosphere, 14, 3935–3958. urn:issn:1994-0416 https://hdl.handle.net/11250/2721735 https://doi.org/10.5194/tc-14-3935-2020 cristin:1848186 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2020 3935-3958 14 The Cryosphere VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Peer reviewed Journal article 2020 fthsvestlandet https://doi.org/10.5194/tc-14-3935-2020 2024-02-02T12:40:37Z Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since the end of the 1990s due to an increase in meltwater runoff and that this trend will accelerate in the future. However, large uncertainties remain, partly due to different approaches for modelling the GrIS SMB, which have to weigh physical complexity or low computing time, different spatial and temporal resolutions, different forcing fields, and different ice sheet topographies and extents, which collectively make an inter-comparison difficult. Our GrIS SMB model intercomparison project (GrSMBMIP) aims to refine these uncertainties by intercomparing 13 models of four types which were forced with the same ERA-Interim reanalysis forcing fields, except for two global models. We interpolate all modelled SMB fields onto a common ice sheet mask at 1 km horizontal resolution for the period 1980–2012 and score the outputs against (1) SMB estimates from a combination of gravimetric remote sensing data from GRACE and measured ice discharge; (2) ice cores, snow pits and in situ SMB observations; and (3) remotely sensed bare ice extent from MODerate-resolution Imaging Spectroradiometer (MODIS). Spatially, the largest spread among models can be found around the margins of the ice sheet, highlighting model deficiencies in an accurate representation of the GrIS ablation zone extent and processes related to surface melt and runoff. Overall, polar regional climate models (RCMs) perform the best compared to observations, in particular for simulating precipitation patterns. However, other simpler and faster models have biases of the same order as RCMs compared with observations and therefore remain useful tools for long-term simulations or coupling with ice sheet models. Finally, it is interesting to note that the ensemble mean of the 13 models produces the best estimate of the present-day SMB relative to observations, suggesting that biases are not systematic among models and that this ensemble estimate can be used as ... Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Høgskulen på Vestlandet: HVL Open Greenland The Cryosphere 14 11 3935 3958 |
institution |
Open Polar |
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Høgskulen på Vestlandet: HVL Open |
op_collection_id |
fthsvestlandet |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 Fettweis, Xavier Hofer, Stefan Krebs-Kanzow, Uta Amory, Charles Aoki, Teruo Berends, Constantijn J. Born, Andreas Box, Jason E. Delhasse, Alison Fujita, Koji Gierz, Paul Goelzer, Heiko Hanna, Edward Hashimoto, Akihiro Huybrechts, Philippe Kapsch, Marie-Luise King, Michaela D. Kittel, Christoph Lang, Charlotte Langen, Peter L. Lenaerts, Jan T.M. Liston, Glen E. Lohmann, Gerrit Mernild, Jacob Sebastian Haugaard Mikolajewicz, Uwe Modali, Kameswarrao Mottram, Ruth H. Niwano, Masashi Noël, Brice Ryan, Jonathan C. Smith, Amy Streffing, Jan Tedesco, Marco Van de Berg, Willem Jan Van den Broeke, Michiel Van de Wal, Rodecrick S. Von Kampenhout, Leo Wilton, David Wouters, Bert Ziemen, Florian Zolles, Tobias GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 |
description |
Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since the end of the 1990s due to an increase in meltwater runoff and that this trend will accelerate in the future. However, large uncertainties remain, partly due to different approaches for modelling the GrIS SMB, which have to weigh physical complexity or low computing time, different spatial and temporal resolutions, different forcing fields, and different ice sheet topographies and extents, which collectively make an inter-comparison difficult. Our GrIS SMB model intercomparison project (GrSMBMIP) aims to refine these uncertainties by intercomparing 13 models of four types which were forced with the same ERA-Interim reanalysis forcing fields, except for two global models. We interpolate all modelled SMB fields onto a common ice sheet mask at 1 km horizontal resolution for the period 1980–2012 and score the outputs against (1) SMB estimates from a combination of gravimetric remote sensing data from GRACE and measured ice discharge; (2) ice cores, snow pits and in situ SMB observations; and (3) remotely sensed bare ice extent from MODerate-resolution Imaging Spectroradiometer (MODIS). Spatially, the largest spread among models can be found around the margins of the ice sheet, highlighting model deficiencies in an accurate representation of the GrIS ablation zone extent and processes related to surface melt and runoff. Overall, polar regional climate models (RCMs) perform the best compared to observations, in particular for simulating precipitation patterns. However, other simpler and faster models have biases of the same order as RCMs compared with observations and therefore remain useful tools for long-term simulations or coupling with ice sheet models. Finally, it is interesting to note that the ensemble mean of the 13 models produces the best estimate of the present-day SMB relative to observations, suggesting that biases are not systematic among models and that this ensemble estimate can be used as ... |
format |
Article in Journal/Newspaper |
author |
Fettweis, Xavier Hofer, Stefan Krebs-Kanzow, Uta Amory, Charles Aoki, Teruo Berends, Constantijn J. Born, Andreas Box, Jason E. Delhasse, Alison Fujita, Koji Gierz, Paul Goelzer, Heiko Hanna, Edward Hashimoto, Akihiro Huybrechts, Philippe Kapsch, Marie-Luise King, Michaela D. Kittel, Christoph Lang, Charlotte Langen, Peter L. Lenaerts, Jan T.M. Liston, Glen E. Lohmann, Gerrit Mernild, Jacob Sebastian Haugaard Mikolajewicz, Uwe Modali, Kameswarrao Mottram, Ruth H. Niwano, Masashi Noël, Brice Ryan, Jonathan C. Smith, Amy Streffing, Jan Tedesco, Marco Van de Berg, Willem Jan Van den Broeke, Michiel Van de Wal, Rodecrick S. Von Kampenhout, Leo Wilton, David Wouters, Bert Ziemen, Florian Zolles, Tobias |
author_facet |
Fettweis, Xavier Hofer, Stefan Krebs-Kanzow, Uta Amory, Charles Aoki, Teruo Berends, Constantijn J. Born, Andreas Box, Jason E. Delhasse, Alison Fujita, Koji Gierz, Paul Goelzer, Heiko Hanna, Edward Hashimoto, Akihiro Huybrechts, Philippe Kapsch, Marie-Luise King, Michaela D. Kittel, Christoph Lang, Charlotte Langen, Peter L. Lenaerts, Jan T.M. Liston, Glen E. Lohmann, Gerrit Mernild, Jacob Sebastian Haugaard Mikolajewicz, Uwe Modali, Kameswarrao Mottram, Ruth H. Niwano, Masashi Noël, Brice Ryan, Jonathan C. Smith, Amy Streffing, Jan Tedesco, Marco Van de Berg, Willem Jan Van den Broeke, Michiel Van de Wal, Rodecrick S. Von Kampenhout, Leo Wilton, David Wouters, Bert Ziemen, Florian Zolles, Tobias |
author_sort |
Fettweis, Xavier |
title |
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
title_short |
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
title_full |
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
title_fullStr |
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
title_full_unstemmed |
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet |
title_sort |
grsmbmip: intercomparison of the modelled 1980-2012 surface mass balance over the greenland ice sheet |
publisher |
European Geosciences Union |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2721735 https://doi.org/10.5194/tc-14-3935-2020 |
op_coverage |
Greenland |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
3935-3958 14 The Cryosphere |
op_relation |
EC/H2020/869304 Fettweis, X., Hofer, S., Krebs-Kanzow, U., Amory, C., Aoki, T., Berends, C. J., … Zolles, T. (2020). GrSMBMIP: Intercomparison of the modelled 1980–2012 surface mass balance over the Greenland Ice Sheet. The Cryosphere, 14, 3935–3958. urn:issn:1994-0416 https://hdl.handle.net/11250/2721735 https://doi.org/10.5194/tc-14-3935-2020 cristin:1848186 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2020 |
op_doi |
https://doi.org/10.5194/tc-14-3935-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
11 |
container_start_page |
3935 |
op_container_end_page |
3958 |
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1792500490329653248 |