Aerosol sulfate and ice nucleation: An exploration of experimental evidence in the Arctic atmosphere
Abstract
Evidence for ice nucleation in association with aerosols collected in the high Arctic are explored with respect to sea salt, biogenic and continental sources of sulfate resolved using isotope apportionment. Sulfate, sulfur dioxide and other dimethylsulfide (DMS) oxidation products were measured and compared to atmospheric DMS flux and concentrations during two shipboard campaigns in the Canadian Archipelago in the fall of 2007 and 2008. These results complement long-term aerosol measurements from Alert, on Ellesmere Island in Nunavut Canada. Insights into aerosol formation and the role of biogenic sulfate in the growth, formation and feedbacks potentially leading to nucleation events will be discussed.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.A54G..07N
- Keywords:
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- 0305 ATMOSPHERIC COMPOSITION AND STRUCTURE / Aerosols and particles;
- 0315 ATMOSPHERIC COMPOSITION AND STRUCTURE / Biosphere/atmosphere interactions;
- 0320 ATMOSPHERIC COMPOSITION AND STRUCTURE / Cloud physics and chemistry;
- 0399 ATMOSPHERIC COMPOSITION AND STRUCTURE / General or miscellaneous