Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?

Our understanding is limited to how transient changes in glacier response to climate warming will influence the catchment hydrology in the Arctic and Sub-Arctic. This understanding is particularly incomplete for flooding extremes because understanding the frequency of such unusual events requires lo...

Full description

Bibliographic Details
Published in:Hydrology and Earth System Sciences
Main Authors: H. E. Dahlke, S. W. Lyon, J. R. Stedinger, G. Rosqvist, P. Jansson
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2012
Subjects:
geo
Online Access:https://doi.org/10.5194/hess-16-2123-2012
http://www.hydrol-earth-syst-sci.net/16/2123/2012/hess-16-2123-2012.pdf
https://doaj.org/article/9180f75c2f29466b840f49f1b3840448
id fttriple:oai:gotriple.eu:oai:doaj.org/article:9180f75c2f29466b840f49f1b3840448
record_format openpolar
spelling fttriple:oai:gotriple.eu:oai:doaj.org/article:9180f75c2f29466b840f49f1b3840448 2023-05-15T12:59:21+02:00 Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter? H. E. Dahlke S. W. Lyon J. R. Stedinger G. Rosqvist P. Jansson 2012-07-01 https://doi.org/10.5194/hess-16-2123-2012 http://www.hydrol-earth-syst-sci.net/16/2123/2012/hess-16-2123-2012.pdf https://doaj.org/article/9180f75c2f29466b840f49f1b3840448 en eng Copernicus Publications doi:10.5194/hess-16-2123-2012 1027-5606 1607-7938 http://www.hydrol-earth-syst-sci.net/16/2123/2012/hess-16-2123-2012.pdf https://doaj.org/article/9180f75c2f29466b840f49f1b3840448 undefined Hydrology and Earth System Sciences, Vol 16, Iss 7, Pp 2123-2141 (2012) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/hess-16-2123-2012 2023-01-22T19:10:05Z Our understanding is limited to how transient changes in glacier response to climate warming will influence the catchment hydrology in the Arctic and Sub-Arctic. This understanding is particularly incomplete for flooding extremes because understanding the frequency of such unusual events requires long records of observation not often available for the Arctic and Sub-Arctic. This study presents a statistical analysis of trends in the magnitude and timing of flood extremes and the mean summer discharge in two sub-arctic catchments, Tarfala and Abisko, in northern Sweden. The catchments have different glacier covers (30% and 1%, respectively). Statistically significant trends (at the 5% level) were identified for both catchments on an annual and on a seasonal scale (3-months averages) using the Mann-Kendall trend test. Stationarity of flood records was tested by analyzing trends in the flood quantiles, using generalized least squares regression. Hydrologic trends were related to observed changes in the precipitation and air temperature, and were correlated with 3-months averaged climate pattern indices (e.g. North Atlantic oscillation). Both catchments showed a statistically significant increase in the annual mean air temperature over the comparison time period of 1985–2009 (Tarfala and Abisko pp = 0.91, Abisko p = 0.44). Despite the similar climate evolution over the studied period in the two catchments, data showed contrasting trends in the magnitude and timing of flood peaks and the mean summer discharge. Hydrologic trends indicated an amplification of the streamflow and flood response in the highly glacierized catchment and a dampening of the response in the non-glacierized catchment. The glacierized mountain catchment showed a statistically significant increasing trend in the flood magnitudes (p = 0.04) that is clearly correlated to the occurrence of extreme precipitation events. It also showed a significant increase in mean summer discharge (p = 0.0002), which is significantly correlated to the decrease in ... Article in Journal/Newspaper Abisko Arctic North Atlantic North Atlantic oscillation Northern Sweden Tarfala Unknown Abisko ENVELOPE(18.829,18.829,68.349,68.349) Arctic Kendall ENVELOPE(-59.828,-59.828,-63.497,-63.497) Tarfala ENVELOPE(18.608,18.608,67.914,67.914) Hydrology and Earth System Sciences 16 7 2123 2141
institution Open Polar
collection Unknown
op_collection_id fttriple
language English
topic envir
geo
spellingShingle envir
geo
H. E. Dahlke
S. W. Lyon
J. R. Stedinger
G. Rosqvist
P. Jansson
Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
topic_facet envir
geo
description Our understanding is limited to how transient changes in glacier response to climate warming will influence the catchment hydrology in the Arctic and Sub-Arctic. This understanding is particularly incomplete for flooding extremes because understanding the frequency of such unusual events requires long records of observation not often available for the Arctic and Sub-Arctic. This study presents a statistical analysis of trends in the magnitude and timing of flood extremes and the mean summer discharge in two sub-arctic catchments, Tarfala and Abisko, in northern Sweden. The catchments have different glacier covers (30% and 1%, respectively). Statistically significant trends (at the 5% level) were identified for both catchments on an annual and on a seasonal scale (3-months averages) using the Mann-Kendall trend test. Stationarity of flood records was tested by analyzing trends in the flood quantiles, using generalized least squares regression. Hydrologic trends were related to observed changes in the precipitation and air temperature, and were correlated with 3-months averaged climate pattern indices (e.g. North Atlantic oscillation). Both catchments showed a statistically significant increase in the annual mean air temperature over the comparison time period of 1985–2009 (Tarfala and Abisko pp = 0.91, Abisko p = 0.44). Despite the similar climate evolution over the studied period in the two catchments, data showed contrasting trends in the magnitude and timing of flood peaks and the mean summer discharge. Hydrologic trends indicated an amplification of the streamflow and flood response in the highly glacierized catchment and a dampening of the response in the non-glacierized catchment. The glacierized mountain catchment showed a statistically significant increasing trend in the flood magnitudes (p = 0.04) that is clearly correlated to the occurrence of extreme precipitation events. It also showed a significant increase in mean summer discharge (p = 0.0002), which is significantly correlated to the decrease in ...
format Article in Journal/Newspaper
author H. E. Dahlke
S. W. Lyon
J. R. Stedinger
G. Rosqvist
P. Jansson
author_facet H. E. Dahlke
S. W. Lyon
J. R. Stedinger
G. Rosqvist
P. Jansson
author_sort H. E. Dahlke
title Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
title_short Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
title_full Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
title_fullStr Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
title_full_unstemmed Contrasting trends in floods for two sub-arctic catchments in northern Sweden – does glacier presence matter?
title_sort contrasting trends in floods for two sub-arctic catchments in northern sweden – does glacier presence matter?
publisher Copernicus Publications
publishDate 2012
url https://doi.org/10.5194/hess-16-2123-2012
http://www.hydrol-earth-syst-sci.net/16/2123/2012/hess-16-2123-2012.pdf
https://doaj.org/article/9180f75c2f29466b840f49f1b3840448
long_lat ENVELOPE(18.829,18.829,68.349,68.349)
ENVELOPE(-59.828,-59.828,-63.497,-63.497)
ENVELOPE(18.608,18.608,67.914,67.914)
geographic Abisko
Arctic
Kendall
Tarfala
geographic_facet Abisko
Arctic
Kendall
Tarfala
genre Abisko
Arctic
North Atlantic
North Atlantic oscillation
Northern Sweden
Tarfala
genre_facet Abisko
Arctic
North Atlantic
North Atlantic oscillation
Northern Sweden
Tarfala
op_source Hydrology and Earth System Sciences, Vol 16, Iss 7, Pp 2123-2141 (2012)
op_relation doi:10.5194/hess-16-2123-2012
1027-5606
1607-7938
http://www.hydrol-earth-syst-sci.net/16/2123/2012/hess-16-2123-2012.pdf
https://doaj.org/article/9180f75c2f29466b840f49f1b3840448
op_rights undefined
op_doi https://doi.org/10.5194/hess-16-2123-2012
container_title Hydrology and Earth System Sciences
container_volume 16
container_issue 7
container_start_page 2123
op_container_end_page 2141
_version_ 1766404498275696640