The complex response of Arctic aerosol to sea-ice retreat

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Fältnamn	Indikatorer	Metadata
000		03237naa a2200385 4500
001		oai:DiVA.org:su-107197
003		SwePub
008		140905s2014 \| \|\|\|\|\|\|\|\|\|\|\|000 \|\|eng\|
024	7	a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1071972 URI
024	7	a https://doi.org/10.5194/acp-14-7543-20142 DOI
040		a (SwePub)su
041		a engb eng
042		9 SwePub
072	7	a ref2 swepub-contenttype
072	7	a art2 swepub-publicationtype
100	1	a Browse, J.4 aut
245	1 0	a The complex response of Arctic aerosol to sea-ice retreat
264		c 2014-07-29
264	1	b Copernicus GmbH,c 2014
338		a print2 rdacarrier
500		a AuthorCount:6;
520		a Loss of summertime Arctic sea ice will lead to a large increase in the emission of aerosols and precursor gases from the ocean surface. It has been suggested that these enhanced emissions will exert substantial aerosol radiative forcings, dominated by the indirect effect of aerosol on clouds. Here, we investigate the potential for these indirect forcings using a global aerosol microphysics model evaluated against aerosol observations from the Arctic Summer Cloud Ocean Study (ASCOS) campaign to examine the response of Arctic cloud condensation nuclei (CCN) to sea-ice retreat. In response to a complete loss of summer ice, we find that north of 70 degrees N emission fluxes of sea salt, marine primary organic aerosol (OA) and dimethyl sulfide increase by a factor of similar to 10, similar to 4 and similar to 15 respectively. However, the CCN response is weak, with negative changes over the central Arctic Ocean. The weak response is due to the efficient scavenging of aerosol by extensive drizzling stratocumulus clouds. In the scavenging-dominated Arctic environment, the production of condensable vapour from oxidation of dimethyl sulfide grows particles to sizes where they can be scavenged. This loss is not sufficiently compensated by new particle formation, due to the suppression of nucleation by the large condensation sink resulting from sea-salt and primary OA emissions. Thus, our results suggest that increased aerosol emissions will not cause a climate feedback through changes in cloud microphysical and radiative properties.
650	7	a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe
650	7	a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng
700	1	a Carslaw, K. S.4 aut
700	1	a Mann, G. W.4 aut
700	1	a Birch, C. E.4 aut
700	1	a Arnold, S. R.4 aut
700	1	a Leck, Carolineu Stockholms universitet,Meteorologiska institutionen (MISU)4 aut0 (Swepub:su)leck
710	2	a Stockholms universitetb Meteorologiska institutionen (MISU)4 org
773	0	t Atmospheric Chemistry And Physicsd : Copernicus GmbHg 14:14, s. 7543-7557q 14:14<7543-7557x 1680-7316x 1680-7324
856	4	u https://doi.org/10.5194/acp-14-7543-2014y Fulltext
856	4	u https://www.atmos-chem-phys.net/14/7543/2014/acp-14-7543-2014.pdf
856	4 8	u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-107197
856	4 8	u https://doi.org/10.5194/acp-14-7543-2014

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Av författaren/redakt...: Browse, J.; Carslaw, K. S.; Mann, G. W.; Birch, C. E.; Arnold, S. R.; Leck, Caroline

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