Sökning: WFRF:(Björkman Mats P. 1978)
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Nitrate stable isot...
Nitrate stable isotopes and major ions in snow and ice samples from four Svalbard sites
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- Vega, Carmen P. (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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- Björkman, Mats P., 1978 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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- Pohjola, Veijo A. (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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Isaksson, E. (författare)
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- Pettersson, Rickard (författare)
- Uppsala universitet,Luft-, vatten- och landskapslära
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Martma, T. (författare)
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Marca, A. (författare)
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Kaiser, J. (författare)
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(creator_code:org_t)
- 2015-04-13
- 2015
- Engelska.
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Ingår i: Polar Research. - : Norwegian Polar Institute. - 0800-0395 .- 1751-8369. ; 34
- Relaterad länk:
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https://doi.org/10.3...
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https://doi.org/10.3...
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https://uu.diva-port... (primary) (Raw object)
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https://gup.ub.gu.se...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Increasing reactive nitrogen (N-r) deposition in the Arctic may adversely impact N-limited ecosystems. To investigate atmospheric transport of N-r to Svalbard, Norwegian Arctic, snow and firn samples were collected from glaciers and analysed to define spatial and temporal variations (1 10 years) in major ion concentrations and the stable isotope composition (delta N-15 and delta O-18) of nitrate (NO3-) across the archipelago. The delta N-15(NO3-) and delta O-18(NO3-) averaged -4 parts per thousand and 67 parts per thousand in seasonal snow (2010-11) and -9 parts per thousand and 74 parts per thousand in firn accumulated over the decade 2001-2011. East-west zonal gradients were observed across the archipelago for some major ions (non-sea salt sulphate and magnesium) and also for delta N-15(NO3-) and delta O-18(NO3-) in snow, which suggests a different origin for air masses arriving in different sectors of Svalbard. We propose that snowfall associated with long-distance air mass transport over the Arctic Ocean inherits relatively low delta N-15(NO3-) due to in-transport N isotope fractionation. In contrast, faster air mass transport from the north-west Atlantic or northern Europe results in snowfall with higher delta N-15(NO3-) because in-transport fractionation of N is then time-limited.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Nitrate
- isotopes
- ice cores
- Svalbard
- pollutants
- ATMOSPHERIC NITRATE
- N-15/N-14 RATIOS
- DENITRIFIER METHOD
- GREENLAND
- LOMONOSOVFONNA
- CORES
- ACCUMULATION
- TRENDS
- RECORD
- SUMMIT
- Ecology
- Geosciences
- Multidisciplinary
- Oceanography
- -JRC/PBL
Publikations- och innehållstyp
- ref (ämneskategori)
- for (ämneskategori)
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