Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard
Abstract In glacierized catchments, meteorological inputs driving surface melting are translated into runoff outputs mediated by the glacier hydrological system: analysis of the relationship between meteorology and diurnal and seasonal patterns of runoff should reflect the functioning of that system...
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crwiley:10.1002/hyp.160 2024-06-02T08:07:07+00:00 Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard Hodgkins, Richard 2001 http://dx.doi.org/10.1002/hyp.160 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.160 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.160 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Hydrological Processes volume 15, issue 3, page 441-460 ISSN 0885-6087 1099-1085 journal-article 2001 crwiley https://doi.org/10.1002/hyp.160 2024-05-03T11:23:44Z Abstract In glacierized catchments, meteorological inputs driving surface melting are translated into runoff outputs mediated by the glacier hydrological system: analysis of the relationship between meteorology and diurnal and seasonal patterns of runoff should reflect the functioning of that system, with the role of meltwater storage likely to be of particular importance. Daily meltwater storage is determined for a glacier at 78 °N in the Svalbard archipelago, by comparing inputs calculated from a surface energy balance model with measured outputs (proglacial discharge). Solar radiation, air temperature, wind speed and proglacial discharge are then analysed by regression and time‐series methods, in order to assess the meteorology–discharge relationship and its variation at diurnal and seasonal time‐scales. The recorded discharge time‐series can be divided into two contrasting intervals: up to early August, proglacial discharge was high and variable, mean hydrographs showed little indication of diurnal cycling, ARIMA models of discharge indicated a non‐seasonal, moving‐average generating process, and there was a net loss of meltwater from storage; from early August, proglacial discharge was low and relatively invariable, but with clearer diurnal cycles, regression models of discharge showed substantially improved correlations with air temperature and solar radiation, ARIMA models indicated a non‐seasonal, autoregressive generating process, and eventually a seasonal component, and there was a net gain in meltwater storage. The transition between the two periods is brief compared with the duration of the melt season. The runoff response to meteorology therefore lacks the strongly progressive element previously identified in mid‐latitude glacierized catchments. In particular, the glacier hydrological system only appears responsive to diurnal forcing following the depletion of the seasonal snowpack meltwater store. Copyright © 2001 John Wiley & Sons, Ltd. Article in Journal/Newspaper glacier Svalbard Wiley Online Library Svalbard Svalbard Archipelago Hydrological Processes 15 3 441 460 |
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language |
English |
description |
Abstract In glacierized catchments, meteorological inputs driving surface melting are translated into runoff outputs mediated by the glacier hydrological system: analysis of the relationship between meteorology and diurnal and seasonal patterns of runoff should reflect the functioning of that system, with the role of meltwater storage likely to be of particular importance. Daily meltwater storage is determined for a glacier at 78 °N in the Svalbard archipelago, by comparing inputs calculated from a surface energy balance model with measured outputs (proglacial discharge). Solar radiation, air temperature, wind speed and proglacial discharge are then analysed by regression and time‐series methods, in order to assess the meteorology–discharge relationship and its variation at diurnal and seasonal time‐scales. The recorded discharge time‐series can be divided into two contrasting intervals: up to early August, proglacial discharge was high and variable, mean hydrographs showed little indication of diurnal cycling, ARIMA models of discharge indicated a non‐seasonal, moving‐average generating process, and there was a net loss of meltwater from storage; from early August, proglacial discharge was low and relatively invariable, but with clearer diurnal cycles, regression models of discharge showed substantially improved correlations with air temperature and solar radiation, ARIMA models indicated a non‐seasonal, autoregressive generating process, and eventually a seasonal component, and there was a net gain in meltwater storage. The transition between the two periods is brief compared with the duration of the melt season. The runoff response to meteorology therefore lacks the strongly progressive element previously identified in mid‐latitude glacierized catchments. In particular, the glacier hydrological system only appears responsive to diurnal forcing following the depletion of the seasonal snowpack meltwater store. Copyright © 2001 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Hodgkins, Richard |
spellingShingle |
Hodgkins, Richard Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
author_facet |
Hodgkins, Richard |
author_sort |
Hodgkins, Richard |
title |
Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
title_short |
Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
title_full |
Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
title_fullStr |
Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
title_full_unstemmed |
Seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in Svalbard |
title_sort |
seasonal evolution of meltwater generation, storage and discharge at a non‐temperate glacier in svalbard |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1002/hyp.160 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fhyp.160 https://onlinelibrary.wiley.com/doi/pdf/10.1002/hyp.160 |
geographic |
Svalbard Svalbard Archipelago |
geographic_facet |
Svalbard Svalbard Archipelago |
genre |
glacier Svalbard |
genre_facet |
glacier Svalbard |
op_source |
Hydrological Processes volume 15, issue 3, page 441-460 ISSN 0885-6087 1099-1085 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/hyp.160 |
container_title |
Hydrological Processes |
container_volume |
15 |
container_issue |
3 |
container_start_page |
441 |
op_container_end_page |
460 |
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1800752128301465600 |