The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments
Glaciers are essential hydrological reservoirs, storing and releasing water at various timescales. Short-term variability in glacier melt is one of the causes of streamflow droughts, here defined as deficiencies from the flow regime. Streamflow droughts in glacierised catchments have a wide range of...
Published in: | Hydrology and Earth System Sciences |
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Copernicus Publications
2018
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Online Access: | https://doi.org/10.5194/hess-22-463-2018 https://www.hydrol-earth-syst-sci.net/22/463/2018/hess-22-463-2018.pdf https://doaj.org/article/4cfb2bbcb72f4ee797c6e4634fffa585 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:4cfb2bbcb72f4ee797c6e4634fffa585 2023-05-15T16:20:27+02:00 The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments M. Van Tiel A. J. Teuling N. Wanders M. J. P. Vis K. Stahl A. F. Van Loon 2018-01-01 https://doi.org/10.5194/hess-22-463-2018 https://www.hydrol-earth-syst-sci.net/22/463/2018/hess-22-463-2018.pdf https://doaj.org/article/4cfb2bbcb72f4ee797c6e4634fffa585 en eng Copernicus Publications doi:10.5194/hess-22-463-2018 1027-5606 1607-7938 https://www.hydrol-earth-syst-sci.net/22/463/2018/hess-22-463-2018.pdf https://doaj.org/article/4cfb2bbcb72f4ee797c6e4634fffa585 undefined Hydrology and Earth System Sciences, Vol 22, Pp 463-485 (2018) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/hess-22-463-2018 2023-01-22T17:53:05Z Glaciers are essential hydrological reservoirs, storing and releasing water at various timescales. Short-term variability in glacier melt is one of the causes of streamflow droughts, here defined as deficiencies from the flow regime. Streamflow droughts in glacierised catchments have a wide range of interlinked causing factors related to precipitation and temperature on short and long timescales. Climate change affects glacier storage capacity, with resulting consequences for discharge regimes and streamflow drought. Future projections of streamflow drought in glacierised basins can, however, strongly depend on the modelling strategies and analysis approaches applied. Here, we examine the effect of different approaches, concerning the glacier modelling and the drought threshold, on the characterisation of streamflow droughts in glacierised catchments. Streamflow is simulated with the Hydrologiska Byråns Vattenbalansavdelning (HBV-light) model for two case study catchments, the Nigardsbreen catchment in Norway and the Wolverine catchment in Alaska, and two future climate change scenarios (RCP4.5 and RCP8.5). Two types of glacier modelling are applied, a constant and dynamic glacier area conceptualisation. Streamflow droughts are identified with the variable threshold level method and their characteristics are compared between two periods, a historical (1975–2004) and future (2071–2100) period. Two existing threshold approaches to define future droughts are employed: (1) the threshold from the historical period; (2) a transient threshold approach, whereby the threshold adapts every year in the future to the changing regimes. Results show that drought characteristics differ among the combinations of glacier area modelling and thresholds. The historical threshold combined with a dynamic glacier area projects extreme increases in drought severity in the future, caused by the regime shift due to a reduction in glacier area. The historical threshold combined with a constant glacier area results in a drastic decrease of ... Article in Journal/Newspaper glacier glacier glaciers Alaska Unknown Norway Hydrology and Earth System Sciences 22 1 463 485 |
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Open Polar |
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language |
English |
topic |
envir geo |
spellingShingle |
envir geo M. Van Tiel A. J. Teuling N. Wanders M. J. P. Vis K. Stahl A. F. Van Loon The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
topic_facet |
envir geo |
description |
Glaciers are essential hydrological reservoirs, storing and releasing water at various timescales. Short-term variability in glacier melt is one of the causes of streamflow droughts, here defined as deficiencies from the flow regime. Streamflow droughts in glacierised catchments have a wide range of interlinked causing factors related to precipitation and temperature on short and long timescales. Climate change affects glacier storage capacity, with resulting consequences for discharge regimes and streamflow drought. Future projections of streamflow drought in glacierised basins can, however, strongly depend on the modelling strategies and analysis approaches applied. Here, we examine the effect of different approaches, concerning the glacier modelling and the drought threshold, on the characterisation of streamflow droughts in glacierised catchments. Streamflow is simulated with the Hydrologiska Byråns Vattenbalansavdelning (HBV-light) model for two case study catchments, the Nigardsbreen catchment in Norway and the Wolverine catchment in Alaska, and two future climate change scenarios (RCP4.5 and RCP8.5). Two types of glacier modelling are applied, a constant and dynamic glacier area conceptualisation. Streamflow droughts are identified with the variable threshold level method and their characteristics are compared between two periods, a historical (1975–2004) and future (2071–2100) period. Two existing threshold approaches to define future droughts are employed: (1) the threshold from the historical period; (2) a transient threshold approach, whereby the threshold adapts every year in the future to the changing regimes. Results show that drought characteristics differ among the combinations of glacier area modelling and thresholds. The historical threshold combined with a dynamic glacier area projects extreme increases in drought severity in the future, caused by the regime shift due to a reduction in glacier area. The historical threshold combined with a constant glacier area results in a drastic decrease of ... |
format |
Article in Journal/Newspaper |
author |
M. Van Tiel A. J. Teuling N. Wanders M. J. P. Vis K. Stahl A. F. Van Loon |
author_facet |
M. Van Tiel A. J. Teuling N. Wanders M. J. P. Vis K. Stahl A. F. Van Loon |
author_sort |
M. Van Tiel |
title |
The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
title_short |
The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
title_full |
The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
title_fullStr |
The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
title_full_unstemmed |
The role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
title_sort |
role of glacier changes and threshold definition in the characterisation of future streamflow droughts in glacierised catchments |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/hess-22-463-2018 https://www.hydrol-earth-syst-sci.net/22/463/2018/hess-22-463-2018.pdf https://doaj.org/article/4cfb2bbcb72f4ee797c6e4634fffa585 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier glacier glaciers Alaska |
genre_facet |
glacier glacier glaciers Alaska |
op_source |
Hydrology and Earth System Sciences, Vol 22, Pp 463-485 (2018) |
op_relation |
doi:10.5194/hess-22-463-2018 1027-5606 1607-7938 https://www.hydrol-earth-syst-sci.net/22/463/2018/hess-22-463-2018.pdf https://doaj.org/article/4cfb2bbcb72f4ee797c6e4634fffa585 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/hess-22-463-2018 |
container_title |
Hydrology and Earth System Sciences |
container_volume |
22 |
container_issue |
1 |
container_start_page |
463 |
op_container_end_page |
485 |
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1766008367583592448 |