Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway
International audience Effects of contrasting climatic conditions and nitrogen (N) deposition levels on streamwater N dynamics are assessed at two small heathland catchments; Dalelva in northern Norway (69°N) and Øygard in southwestern Norway (58°N). The study comprises 11 years of data on climate,...
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ftinsu:oai:HAL:hal-00304667v1 2023-11-12T04:14:01+01:00 Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway Kaste, Ø. Skjelkvåle, B. L. Norwegian Institute for Water Research (NIVA) 2002 https://hal.science/hal-00304667 https://hal.science/hal-00304667/document https://hal.science/hal-00304667/file/hess-6-351-2002.pdf en eng HAL CCSD European Geosciences Union hal-00304667 https://hal.science/hal-00304667 https://hal.science/hal-00304667/document https://hal.science/hal-00304667/file/hess-6-351-2002.pdf info:eu-repo/semantics/OpenAccess ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304667 Hydrology and Earth System Sciences Discussions, 2002, 6 (3), pp.351-362 [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 2002 ftinsu 2023-10-25T16:26:03Z International audience Effects of contrasting climatic conditions and nitrogen (N) deposition levels on streamwater N dynamics are assessed at two small heathland catchments; Dalelva in northern Norway (69°N) and Øygard in southwestern Norway (58°N). The study comprises 11 years of data on climate, hydrology and N inputs/outputs from Dalelva and 8 years of corresponding data from Øygard. Both sites are comparable in catchment size, geology and land cover characteristics, but have large differences in climate and N deposition. Dalelva is characterised by a cold, arctic climate and low N deposition (2-3 kg N ha ?1 y ?1 ), whereas the Øygard site has a more mild, humid climate with much larger N deposition (13?19 kg N ha ?1 yr ?1 ). Streamwater nitrate (NO 3 ? ) concentrations at Dalelva generally were negligible during the growing season, but showed a steady increase during the dormant season until a maximum of 40-100 ?g N L ?1 was reached just before snowmelt. At onset of the snowmelt flood, NO 3 ? concentrations decreased momentarily to very low levels, suggesting that N eluted from the seasonal snowpack to a great extent was infiltrated and immobilised in the soils. At Øygard, flood peaks occurred frequently during all seasons, and usually there was no distinct spring flood. A lack of clear dilution effects from floods on streamwater N 3 ? concentrations may indicate a relatively high NO 3 ? leaching potential in this catchment. On average, the annual NO 3 ? export was negligible at Dalelva (<0.1 kg N ha ?1 yr ?1 ), while at Øygard it amounted to 3.0±0.3 (±1 s.d.) kg ha ?1 yr ?1 , or nearly 20% of the annual N deposition. In addition to this relatively high annual N loss, elevated NO 3 ? concentrations during the growing season further indicate that the N supply at Øygard is in excess of the combined plant and microbial demand. Keywords: catchments, surface water, nitrogen deposition, nitrate leaching, climate, hydrology, snowmelt, Dalelva brook, Øygard brook Article in Journal/Newspaper Arctic Northern Norway Institut national des sciences de l'Univers: HAL-INSU Arctic Norway 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. Skjelkvåle, B. L. Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
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 Effects of contrasting climatic conditions and nitrogen (N) deposition levels on streamwater N dynamics are assessed at two small heathland catchments; Dalelva in northern Norway (69°N) and Øygard in southwestern Norway (58°N). The study comprises 11 years of data on climate, hydrology and N inputs/outputs from Dalelva and 8 years of corresponding data from Øygard. Both sites are comparable in catchment size, geology and land cover characteristics, but have large differences in climate and N deposition. Dalelva is characterised by a cold, arctic climate and low N deposition (2-3 kg N ha ?1 y ?1 ), whereas the Øygard site has a more mild, humid climate with much larger N deposition (13?19 kg N ha ?1 yr ?1 ). Streamwater nitrate (NO 3 ? ) concentrations at Dalelva generally were negligible during the growing season, but showed a steady increase during the dormant season until a maximum of 40-100 ?g N L ?1 was reached just before snowmelt. At onset of the snowmelt flood, NO 3 ? concentrations decreased momentarily to very low levels, suggesting that N eluted from the seasonal snowpack to a great extent was infiltrated and immobilised in the soils. At Øygard, flood peaks occurred frequently during all seasons, and usually there was no distinct spring flood. A lack of clear dilution effects from floods on streamwater N 3 ? concentrations may indicate a relatively high NO 3 ? leaching potential in this catchment. On average, the annual NO 3 ? export was negligible at Dalelva (<0.1 kg N ha ?1 yr ?1 ), while at Øygard it amounted to 3.0±0.3 (±1 s.d.) kg ha ?1 yr ?1 , or nearly 20% of the annual N deposition. In addition to this relatively high annual N loss, elevated NO 3 ? concentrations during the growing season further indicate that the N supply at Øygard is in excess of the combined plant and microbial demand. Keywords: catchments, surface water, nitrogen deposition, nitrate leaching, climate, hydrology, snowmelt, Dalelva brook, Øygard brook |
author2 |
Norwegian Institute for Water Research (NIVA) |
format |
Article in Journal/Newspaper |
author |
Kaste, Ø. Skjelkvåle, B. L. |
author_facet |
Kaste, Ø. Skjelkvåle, B. L. |
author_sort |
Kaste, Ø. |
title |
Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
title_short |
Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
title_full |
Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
title_fullStr |
Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
title_full_unstemmed |
Nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and N deposition in Norway |
title_sort |
nitrogen dynamics in runoff from two small heathland catchments representing opposite extremes with respect to climate and n deposition in norway |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00304667 https://hal.science/hal-00304667/document https://hal.science/hal-00304667/file/hess-6-351-2002.pdf |
long_lat |
ENVELOPE(8.517,8.517,62.500,62.500) |
geographic |
Arctic Norway Øygard |
geographic_facet |
Arctic Norway Øygard |
genre |
Arctic Northern Norway |
genre_facet |
Arctic Northern Norway |
op_source |
ISSN: 1812-2108 EISSN: 1812-2116 Hydrology and Earth System Sciences Discussions https://hal.science/hal-00304667 Hydrology and Earth System Sciences Discussions, 2002, 6 (3), pp.351-362 |
op_relation |
hal-00304667 https://hal.science/hal-00304667 https://hal.science/hal-00304667/document https://hal.science/hal-00304667/file/hess-6-351-2002.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331760160276480 |