Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland
International audience The Integrated Nitrogen model for Catchments (INCA) was applied to three upland catchments in Norway and Finland to assess the possible impacts of climate change and nitrogen (N) deposition on concentrations and fluxes of N in streamwater in cold regions of Europe. The study s...
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ftinsu:oai:HAL:hal-00304962v1 2023-11-12T04:14:00+01:00 Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland Kaste, Ø. Rankinen, K. Lepistö, A. Norwegian Institute for Water Research (NIVA) Finnish Environment Institute (SYKE) 2004 https://hal.science/hal-00304962 https://hal.science/hal-00304962/document https://hal.science/hal-00304962/file/hess-8-778-2004.pdf en eng HAL CCSD European Geosciences Union hal-00304962 https://hal.science/hal-00304962 https://hal.science/hal-00304962/document https://hal.science/hal-00304962/file/hess-8-778-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304962 Hydrology and Earth System Sciences Discussions, 2004, 8 (4), pp.778-792 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2004 ftinsu 2023-10-25T16:25:58Z International audience The Integrated Nitrogen model for Catchments (INCA) was applied to three upland catchments in Norway and Finland to assess the possible impacts of climate change and nitrogen (N) deposition on concentrations and fluxes of N in streamwater in cold regions of Europe. The study sites cover gradients in climate and N deposition from the southern boreal Øygard Brook (2.6 km 2 ) in SW Norway, via the southern/middle boreal Simojoki River (3610 km 2 ) in northern Finland to the sub-arctic Dalelva Brook (3.2 km 2 ) in northern Norway. The INCA scenario simulations included future N deposition scenarios (current legislation and maximum feasible reduction) and climate scenarios for 2050 (ECHAM4/OPYC3; HadCM3) treated separately and in combination. As a result of climate change, the INCA model predicted markedly reduced duration and amounts of snow cover in all catchments. The occurrence of winter rainfall and melting periods was predicted to become more frequent so that more frequent floods in winter will to a large extent replace the regular snowmelt flood in spring. At the northernmost catchment, Dalelva, the predicted temperature increase might result in a doubling of the net mineralisation rate, thereby greatly increasing the amount of available inorganic N. At all catchments, the increased N supply was predicted to be largely balanced by a corresponding increase in N retention, and relatively small increases in NO 3 - leaching rates were predicted. This dynamic relationship is, however, strongly dependent on the temperature responses of the key N transformation processes modelled. A future reduction in N emissions and deposition, as agreed under current legislation, would have pronounced effects on concentrations of NO 3 - in streamwater at the southernmost catchment, Øygard, even following a climate change around 2050. At the more remote Dalelva and Simojoki catchments, the N emission reductions will be small compared to the internal N recycling processes, and climate change will to a large ... Article in Journal/Newspaper Arctic Climate change Northern Finland Northern Norway Institut national des sciences de l'Univers: HAL-INSU Arctic Inca ENVELOPE(-59.194,-59.194,-62.308,-62.308) Norway Simojoki ENVELOPE(25.050,25.050,65.617,65.617) Øygard ENVELOPE(8.517,8.517,62.500,62.500) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Kaste, Ø. Rankinen, K. Lepistö, A. Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Integrated Nitrogen model for Catchments (INCA) was applied to three upland catchments in Norway and Finland to assess the possible impacts of climate change and nitrogen (N) deposition on concentrations and fluxes of N in streamwater in cold regions of Europe. The study sites cover gradients in climate and N deposition from the southern boreal Øygard Brook (2.6 km 2 ) in SW Norway, via the southern/middle boreal Simojoki River (3610 km 2 ) in northern Finland to the sub-arctic Dalelva Brook (3.2 km 2 ) in northern Norway. The INCA scenario simulations included future N deposition scenarios (current legislation and maximum feasible reduction) and climate scenarios for 2050 (ECHAM4/OPYC3; HadCM3) treated separately and in combination. As a result of climate change, the INCA model predicted markedly reduced duration and amounts of snow cover in all catchments. The occurrence of winter rainfall and melting periods was predicted to become more frequent so that more frequent floods in winter will to a large extent replace the regular snowmelt flood in spring. At the northernmost catchment, Dalelva, the predicted temperature increase might result in a doubling of the net mineralisation rate, thereby greatly increasing the amount of available inorganic N. At all catchments, the increased N supply was predicted to be largely balanced by a corresponding increase in N retention, and relatively small increases in NO 3 - leaching rates were predicted. This dynamic relationship is, however, strongly dependent on the temperature responses of the key N transformation processes modelled. A future reduction in N emissions and deposition, as agreed under current legislation, would have pronounced effects on concentrations of NO 3 - in streamwater at the southernmost catchment, Øygard, even following a climate change around 2050. At the more remote Dalelva and Simojoki catchments, the N emission reductions will be small compared to the internal N recycling processes, and climate change will to a large ... |
author2 |
Norwegian Institute for Water Research (NIVA) Finnish Environment Institute (SYKE) |
format |
Article in Journal/Newspaper |
author |
Kaste, Ø. Rankinen, K. Lepistö, A. |
author_facet |
Kaste, Ø. Rankinen, K. Lepistö, A. |
author_sort |
Kaste, Ø. |
title |
Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
title_short |
Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
title_full |
Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
title_fullStr |
Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
title_full_unstemmed |
Modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of Norway and Finland |
title_sort |
modelling impacts of climate and deposition changes on nitrogen fluxes in northern catchments of norway and finland |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00304962 https://hal.science/hal-00304962/document https://hal.science/hal-00304962/file/hess-8-778-2004.pdf |
long_lat |
ENVELOPE(-59.194,-59.194,-62.308,-62.308) ENVELOPE(25.050,25.050,65.617,65.617) ENVELOPE(8.517,8.517,62.500,62.500) |
geographic |
Arctic Inca Norway Simojoki Øygard |
geographic_facet |
Arctic Inca Norway Simojoki Øygard |
genre |
Arctic Climate change Northern Finland Northern Norway |
genre_facet |
Arctic Climate change Northern Finland Northern Norway |
op_source |
ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304962 Hydrology and Earth System Sciences Discussions, 2004, 8 (4), pp.778-792 |
op_relation |
hal-00304962 https://hal.science/hal-00304962 https://hal.science/hal-00304962/document https://hal.science/hal-00304962/file/hess-8-778-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331759333998592 |