The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs
The supraglacial drainage system of the Greenland Ice Sheet, in combination with surface melt rate, controls the rate of water flow into moulins, a major driver of subglacial water pressure. We apply the Subaerial Drainage System (SaDS) model, a physically based surface meltwater flow model, to a ∼2...
Published in: | The Cryosphere |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-17-2607-2023 https://noa.gwlb.de/receive/cop_mods_00067546 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065999/tc-17-2607-2023.pdf https://tc.copernicus.org/articles/17/2607/2023/tc-17-2607-2023.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00067546 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00067546 2023-07-30T04:03:47+02:00 The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs Hill, Tim Dow, Christine F. 2023-07 electronic https://doi.org/10.5194/tc-17-2607-2023 https://noa.gwlb.de/receive/cop_mods_00067546 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065999/tc-17-2607-2023.pdf https://tc.copernicus.org/articles/17/2607/2023/tc-17-2607-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-2607-2023 https://noa.gwlb.de/receive/cop_mods_00067546 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065999/tc-17-2607-2023.pdf https://tc.copernicus.org/articles/17/2607/2023/tc-17-2607-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-2607-2023 2023-07-09T23:19:02Z The supraglacial drainage system of the Greenland Ice Sheet, in combination with surface melt rate, controls the rate of water flow into moulins, a major driver of subglacial water pressure. We apply the Subaerial Drainage System (SaDS) model, a physically based surface meltwater flow model, to a ∼20×27km2 catchment on the southwestern Greenland Ice Sheet for 4 years of melt forcing (2011, 2012, 2015, and 2016) to (1) examine the relationship between surface melt rate and the rate, diurnal amplitude, and timing of surface inputs to moulins; (2) compare SaDS to contemporary models; and (3) present a framework for selecting appropriate supraglacial drainage models for different modelling objectives. We find that variations in the rate and timing of modelled moulin inputs related to the development of supraglacial channels are relatively more important in years with low melt volumes than years with high melt volumes. We suggest that a process-resolving supraglacial hydrology model (e.g., SaDS) should be considered when modelling outcomes are sensitive to subdiurnal and long-term seasonal changes in the rate of discharge into moulins. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Greenland The Cryosphere 17 7 2607 2624 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Hill, Tim Dow, Christine F. The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
topic_facet |
article Verlagsveröffentlichung |
description |
The supraglacial drainage system of the Greenland Ice Sheet, in combination with surface melt rate, controls the rate of water flow into moulins, a major driver of subglacial water pressure. We apply the Subaerial Drainage System (SaDS) model, a physically based surface meltwater flow model, to a ∼20×27km2 catchment on the southwestern Greenland Ice Sheet for 4 years of melt forcing (2011, 2012, 2015, and 2016) to (1) examine the relationship between surface melt rate and the rate, diurnal amplitude, and timing of surface inputs to moulins; (2) compare SaDS to contemporary models; and (3) present a framework for selecting appropriate supraglacial drainage models for different modelling objectives. We find that variations in the rate and timing of modelled moulin inputs related to the development of supraglacial channels are relatively more important in years with low melt volumes than years with high melt volumes. We suggest that a process-resolving supraglacial hydrology model (e.g., SaDS) should be considered when modelling outcomes are sensitive to subdiurnal and long-term seasonal changes in the rate of discharge into moulins. |
format |
Article in Journal/Newspaper |
author |
Hill, Tim Dow, Christine F. |
author_facet |
Hill, Tim Dow, Christine F. |
author_sort |
Hill, Tim |
title |
The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
title_short |
The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
title_full |
The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
title_fullStr |
The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
title_full_unstemmed |
The impact of surface melt rate and catchment characteristics on Greenland Ice Sheet moulin inputs |
title_sort |
impact of surface melt rate and catchment characteristics on greenland ice sheet moulin inputs |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-2607-2023 https://noa.gwlb.de/receive/cop_mods_00067546 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065999/tc-17-2607-2023.pdf https://tc.copernicus.org/articles/17/2607/2023/tc-17-2607-2023.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-2607-2023 https://noa.gwlb.de/receive/cop_mods_00067546 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00065999/tc-17-2607-2023.pdf https://tc.copernicus.org/articles/17/2607/2023/tc-17-2607-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-2607-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
7 |
container_start_page |
2607 |
op_container_end_page |
2624 |
_version_ |
1772814867288293376 |