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Sökning: L773:1680 7316 > (2020-2024) > Measurement report:...

Measurement report: Spatial variations in ionic chemistry and water-stable isotopes in the snowpack on glaciers across Svalbard during the 2015-2016 snow accumulation season

Barbaro, E. (författare)
CNR, Inst Polar Sci ISP, Via Torino 155, I-30170 Venice Mestre, Italy; Ca Foscari Univ Venice, Dept Environm Sci Informat & Stat, Via Torino 155, I-30172 Venice, Italy
Koziol, K. (författare)
Gdansk Univ Technol, Chem Fac, Dept Analyt Chem, G Narutowicza 11-12, PL-80233 Gdansk, Poland
Björkman, Mats P., 1978 (författare)
Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences,Univ Gothenburg, Dept Earth Sci, Box 460, S-40530 Gothenburg, Sweden
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Vega, Carmen (författare)
Uppsala universitet,Luft-, vatten- och landskapslära
Zdanowicz, Christian, 1966- (författare)
Uppsala universitet,Luft-, vatten- och landskapslära
Martma, T. (författare)
Tallinn Univ Technol, Dept Geol, Ehitajate Tee 5, EE-19086 Tallinn, Estonia
Gallet, J. C. (författare)
Norwegian Polar Res Inst, N-9296 Tromsø, Norway
Kepski, D. (författare)
Polish Acad Sci, Inst Geophys, Ksiecia Janusza 64, PL-01452 Warsaw, Poland
Larose, C. (författare)
Univ Lyon, Lab Ampere, CNRS, Environm MicrobialGen, Lyon, France
Luks, B. (författare)
Univ Lyon, Lab Ampere, CNRS, Environm MicrobialGen, Lyon, France
Tolle, F. (författare)
Univ Franche Comte, Besancon, FEMTO ST, UMR 6174 CNRS, Besancon, France
Schuler, T. V. (författare)
Univ Oslo, Dept Geosci, Oslo, Norway; Univ Ctr Svalbard, Arctic Geophys, UNIS, Svalbard, Norway
Uszczyk, A. (författare)
Univ Silesia Katowice, Fac Nat Sci, Bedzinska 60, PL-41200 Sosnowiec, Poland
Spolaor, A. (författare)
CNR, Inst Polar Sci ISP, Via Torino 155, I-30170 Venice Mestre, Italy; Ca Foscari Univ Venice, Dept Environm Sci Informat & Stat, Via Torino 155, I-30172 Venice, Italy
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 (creator_code:org_t)
2021-03-02
2021
Engelska.
Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 21:4, s. 3163-3180
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • The Svalbard archipelago, located at the Arctic sea-ice edge between 74 and 81 degrees N, is similar to 60% covered by glaciers. The region experiences rapid variations in atmospheric flow during the snow season (from late September to May) and can be affected by air advected from both lower and higher latitudes, which likely impact the chemical composition of snowfall. While long-term changes in Svalbard snow chemistry have been documented in ice cores drilled from two high-elevation glaciers, the spatial variability of the snowpack composition across Svalbard is comparatively poorly understood. Here, we report the results of the most comprehensive seasonal snow chemistry survey to date, carried out in April 2016 across 22 sites on seven glaciers across the archipelago. At each glacier, three snowpits were sam- pled along the altitudinal profiles and the collected samples were analysed for major ions (Ca2+, K+, Na+, Mg2+, NH4+, SO42, Br-, Cl-, and NO3-) and stable water isotopes ( ffi18O, delta H-2). The main aims were to investigate the natural and anthropogenic processes influencing the snowpack and to better understand the influence of atmospheric aerosol transport and deposition patterns on the snow chemical composition. The snow deposited in the southern region of Svalbard is characterized by the highest total ionic loads, mainly attributed to sea-salt particles. Both NO3 and NH4+ in the seasonal snowpack reflect secondary aerosol formation and post-depositional changes, resulting in very different spatial deposition patterns: NO3 has its highest loading in northwestern Spitsbergen and NH4+ in the south-west. The Br enrichment in snow is highest in north-eastern glacier sites closest to areas of extensive sea-ice coverage. Spatial correlation patterns between Na+ and delta O-18 suggest that the influence of long-range transport of aerosols on snow chemistry is proportionally greater above 600-700ma.s.l.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)

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Environmental Sciences & Ecology
Meteorology & Atmospheric Sciences

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