Seasonal and interannual variability of elemental carbon in the snowpack of Storglaciären, northern Sweden
| Autor: | Susanne Ingvander, Helen E. Dahlke, Gunhild Rosqvist, J. Svensson |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
010504 meteorology & atmospheric sciences
Atmospheric circulation 0207 environmental engineering 02 engineering and technology Wind direction Seasonality Snowpack Atmospheric sciences medicine.disease Snow 01 natural sciences chemistry.chemical_compound Deposition (aerosol physics) chemistry Climatology medicine Precipitation Sulfate 020701 environmental engineering human activities Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Annals of Glaciology. 54:50-58 |
| ISSN: | 1727-5644 0260-3055 |
| DOI: | 10.3189/2013aog62a229 |
| Popis: | We studied the variability of elemental carbon (EC) over 3 years (2009–11) in the winter snowpack of Storglaciären, Sweden. The goal of this study was to relate the seasonal variation in EC to specific snow accumulation events in order to improve understanding of how different atmospheric circulation patterns control the deposition of EC. Specifically, we related meteorological parameters (e.g. wind direction, precipitation) to snow physical properties, EC content, stable-isotope δ18O ratios and anion concentrations in the snowpack. The distribution of EC in the snowpack varied between years. Low EC contents corresponded to a predominance of weather systems originating in the northwest, i.e. North Atlantic. Analysis of single layers within the snowpacks showed that snow layers enriched in heavy isotopes coincided predominantly with low EC contents but high chloride and sulfate concentration. Based on this isotopic and geochemical evidence, snow deposited during these events had a strong oceanic, i.e. North Atlantic, imprint. In contrast, snow layers with high EC content coincided with snow layers depleted in heavy isotopes but high anion concentrations, indicating a more continental source of air masses and origin of EC from industrial emissions. |
| Databáze: | OpenAIRE |
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