Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate
peer reviewed Surface runoff constitutes a large percentage of Greenland Ice Sheet (GrIS) mass loss at present but is difficult to measure directly. This study provides a novel method to estimate surface runoff through remote sensing of supraglacial lake volumes. Because terminal, non-draining (cons...
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Online Access: | https://orbi.uliege.be/handle/2268/242137 https://orbi.uliege.be/bitstream/2268/242137/1/yang2019.pdf https://doi.org/10.1016/j.rse.2019.111459 |
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ftorbi:oai:orbi.ulg.ac.be:2268/242137 2024-04-21T08:03:23+00:00 Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate Yang, K. Smith, L. Fettweis, Xavier Gleason, C. Lu, Y. LI, M. 2019-10-25 https://orbi.uliege.be/handle/2268/242137 https://orbi.uliege.be/bitstream/2268/242137/1/yang2019.pdf https://doi.org/10.1016/j.rse.2019.111459 en eng Elsevier https://www.sciencedirect.com/science/article/abs/pii/S003442571930478X urn:issn:0034-4257 urn:issn:1879-0704 https://orbi.uliege.be/handle/2268/242137 info:hdl:2268/242137 https://orbi.uliege.be/bitstream/2268/242137/1/yang2019.pdf doi:10.1016/j.rse.2019.111459 scopus-id:2-s2.0-85073832522 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Remote Sensing of Environment (2019-10-25) 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 2019 ftorbi https://doi.org/10.1016/j.rse.2019.111459 2024-03-27T14:54:04Z peer reviewed Surface runoff constitutes a large percentage of Greenland Ice Sheet (GrIS) mass loss at present but is difficult to measure directly. This study provides a novel method to estimate surface runoff through remote sensing of supraglacial lake volumes. Because terminal, non-draining (consistently expanding during the melt season) lakes impound runoff from their surrounding contributing catchments, such changes reflect runoff produced within the catchment. To estimate supraglacial lake volumes, multi-temporal lake maps derived from Landsat-8 images are intersected with dry lake-bed topographic depressions (showing lake bathymetry) identified for two supraglacial catchments (~10 km2) in southwestern GrIS, using high-resolution (2 m) ArcticDEMs. Intersecting remotely sensed lake shorelines with their underlying ice surface topography yields multi-temporal lake volume changes, which are then compared with cumulative runoff as simulated by four Surface Mass Balance (SMB) models (HIRHAM5, MAR3.6, RACMO2.3, and MERRA-2). Comparison of cumulative lake infilling with SMB simulations for these two lakes over the period 8–31 July 2015 indicates that SMB models overestimated surface runoff by 106 – 123%. These large offsets improved after early July, overestimating runoff by 40 – 55%. The runoff delay function incorporated into the MAR3.6 model improves simulation of early melt season runoff, signifying the importance of integrating meltwater routing schemes into SMB models for improved understanding of Greenland supraglacial hydrology and surface mass balance. Article in Journal/Newspaper Greenland Ice Sheet University of Liège: ORBi (Open Repository and Bibliography) Remote Sensing of Environment 234 111459 |
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 Yang, K. Smith, L. Fettweis, Xavier Gleason, C. Lu, Y. LI, M. Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
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 Surface runoff constitutes a large percentage of Greenland Ice Sheet (GrIS) mass loss at present but is difficult to measure directly. This study provides a novel method to estimate surface runoff through remote sensing of supraglacial lake volumes. Because terminal, non-draining (consistently expanding during the melt season) lakes impound runoff from their surrounding contributing catchments, such changes reflect runoff produced within the catchment. To estimate supraglacial lake volumes, multi-temporal lake maps derived from Landsat-8 images are intersected with dry lake-bed topographic depressions (showing lake bathymetry) identified for two supraglacial catchments (~10 km2) in southwestern GrIS, using high-resolution (2 m) ArcticDEMs. Intersecting remotely sensed lake shorelines with their underlying ice surface topography yields multi-temporal lake volume changes, which are then compared with cumulative runoff as simulated by four Surface Mass Balance (SMB) models (HIRHAM5, MAR3.6, RACMO2.3, and MERRA-2). Comparison of cumulative lake infilling with SMB simulations for these two lakes over the period 8–31 July 2015 indicates that SMB models overestimated surface runoff by 106 – 123%. These large offsets improved after early July, overestimating runoff by 40 – 55%. The runoff delay function incorporated into the MAR3.6 model improves simulation of early melt season runoff, signifying the importance of integrating meltwater routing schemes into SMB models for improved understanding of Greenland supraglacial hydrology and surface mass balance. |
format |
Article in Journal/Newspaper |
author |
Yang, K. Smith, L. Fettweis, Xavier Gleason, C. Lu, Y. LI, M. |
author_facet |
Yang, K. Smith, L. Fettweis, Xavier Gleason, C. Lu, Y. LI, M. |
author_sort |
Yang, K. |
title |
Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
title_short |
Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
title_full |
Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
title_fullStr |
Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
title_full_unstemmed |
Surface meltwater runoff on the Greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
title_sort |
surface meltwater runoff on the greenland ice sheet estimated from remotely sensed supraglacial lake infilling rate |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://orbi.uliege.be/handle/2268/242137 https://orbi.uliege.be/bitstream/2268/242137/1/yang2019.pdf https://doi.org/10.1016/j.rse.2019.111459 |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Remote Sensing of Environment (2019-10-25) |
op_relation |
https://www.sciencedirect.com/science/article/abs/pii/S003442571930478X urn:issn:0034-4257 urn:issn:1879-0704 https://orbi.uliege.be/handle/2268/242137 info:hdl:2268/242137 https://orbi.uliege.be/bitstream/2268/242137/1/yang2019.pdf doi:10.1016/j.rse.2019.111459 scopus-id:2-s2.0-85073832522 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.rse.2019.111459 |
container_title |
Remote Sensing of Environment |
container_volume |
234 |
container_start_page |
111459 |
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1796943257578504192 |