Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation
[1] The drainage systems of polythermal glaciers play an important role in high-latitude hydrology, and are determinants of ice flow rate. Flow-recession analysis and linear-reservoir simulation of runoff time series are here used to evaluate seasonal and inter-annual variability in the drainage sys...
Published in: | Water Resources Research |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
BlackWell Publishing Ltd
2013
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4282401 https://doi.org/10.1002/wrcr.20257 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:4282401 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:4282401 2023-05-15T15:10:45+02:00 Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation Hodgkins, Richard Cooper, Richard Tranter, Martyn Wadham, Jemma 2013-07-26 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4282401 https://doi.org/10.1002/wrcr.20257 en eng BlackWell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1002/wrcr.20257 ©2013. The Authors. Water Resources Research published by Wiley on behalf of American Geophysical Union. http://creativecommons.org/licenses/by/3.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Regular Articles Text 2013 ftpubmed https://doi.org/10.1002/wrcr.20257 2015-01-18T01:13:38Z [1] The drainage systems of polythermal glaciers play an important role in high-latitude hydrology, and are determinants of ice flow rate. Flow-recession analysis and linear-reservoir simulation of runoff time series are here used to evaluate seasonal and inter-annual variability in the drainage system of the polythermal Finsterwalderbreen, Svalbard, in 1999 and 2000. Linear-flow recessions are pervasive, with mean coefficients of a fast reservoir varying from 16 (1999) to 41 h (2000), and mean coefficients of an intermittent, slow reservoir varying from 54 (1999) to 114 h (2000). Drainage-system efficiency is greater overall in the first of the two seasons, the simplest explanation of which is more rapid depletion of the snow cover. Reservoir coefficients generally decline during each season (at 0.22 h d−1 in 1999 and 0.52 h d−1 in 2000), denoting an increase in drainage efficiency. However, coefficients do not exhibit a consistent relationship with discharge. Finsterwalderbreen therefore appears to behave as an intermediate case between temperate glaciers and other polythermal glaciers with smaller proportions of temperate ice. Linear-reservoir runoff simulations exhibit limited sensitivity to a relatively wide range of reservoir coefficients, although the use of fixed coefficients in a spatially lumped model can generate significant subseasonal error. At Finsterwalderbreen, an ice-marginal channel with the characteristics of a fast reservoir, and a subglacial upwelling with the characteristics of a slow reservoir, both route meltwater to the terminus. This suggests that drainage-system components of significantly contrasting efficiencies can coexist spatially and temporally at polythermal glaciers. Text Arctic glacier Svalbard PubMed Central (PMC) Arctic Finsterwalderbreen ENVELOPE(15.273,15.273,77.489,77.489) Svalbard Water Resources Research 49 7 4230 4243 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Regular Articles |
spellingShingle |
Regular Articles Hodgkins, Richard Cooper, Richard Tranter, Martyn Wadham, Jemma Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
topic_facet |
Regular Articles |
description |
[1] The drainage systems of polythermal glaciers play an important role in high-latitude hydrology, and are determinants of ice flow rate. Flow-recession analysis and linear-reservoir simulation of runoff time series are here used to evaluate seasonal and inter-annual variability in the drainage system of the polythermal Finsterwalderbreen, Svalbard, in 1999 and 2000. Linear-flow recessions are pervasive, with mean coefficients of a fast reservoir varying from 16 (1999) to 41 h (2000), and mean coefficients of an intermittent, slow reservoir varying from 54 (1999) to 114 h (2000). Drainage-system efficiency is greater overall in the first of the two seasons, the simplest explanation of which is more rapid depletion of the snow cover. Reservoir coefficients generally decline during each season (at 0.22 h d−1 in 1999 and 0.52 h d−1 in 2000), denoting an increase in drainage efficiency. However, coefficients do not exhibit a consistent relationship with discharge. Finsterwalderbreen therefore appears to behave as an intermediate case between temperate glaciers and other polythermal glaciers with smaller proportions of temperate ice. Linear-reservoir runoff simulations exhibit limited sensitivity to a relatively wide range of reservoir coefficients, although the use of fixed coefficients in a spatially lumped model can generate significant subseasonal error. At Finsterwalderbreen, an ice-marginal channel with the characteristics of a fast reservoir, and a subglacial upwelling with the characteristics of a slow reservoir, both route meltwater to the terminus. This suggests that drainage-system components of significantly contrasting efficiencies can coexist spatially and temporally at polythermal glaciers. |
format |
Text |
author |
Hodgkins, Richard Cooper, Richard Tranter, Martyn Wadham, Jemma |
author_facet |
Hodgkins, Richard Cooper, Richard Tranter, Martyn Wadham, Jemma |
author_sort |
Hodgkins, Richard |
title |
Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
title_short |
Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
title_full |
Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
title_fullStr |
Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
title_full_unstemmed |
Drainage-system development in consecutive melt seasons at a polythermal, Arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
title_sort |
drainage-system development in consecutive melt seasons at a polythermal, arctic glacier, evaluated by flow-recession analysis and linear-reservoir simulation |
publisher |
BlackWell Publishing Ltd |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4282401 https://doi.org/10.1002/wrcr.20257 |
long_lat |
ENVELOPE(15.273,15.273,77.489,77.489) |
geographic |
Arctic Finsterwalderbreen Svalbard |
geographic_facet |
Arctic Finsterwalderbreen Svalbard |
genre |
Arctic glacier Svalbard |
genre_facet |
Arctic glacier Svalbard |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1002/wrcr.20257 |
op_rights |
©2013. The Authors. Water Resources Research published by Wiley on behalf of American Geophysical Union. http://creativecommons.org/licenses/by/3.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/wrcr.20257 |
container_title |
Water Resources Research |
container_volume |
49 |
container_issue |
7 |
container_start_page |
4230 |
op_container_end_page |
4243 |
_version_ |
1766341712843636736 |