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Search: id:"swepub:oai:DiVA.org:su-219814" > Revealing the chemi...

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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00006046naa a2200445 4500
001oai:DiVA.org:su-219814
003SwePub
008230802s2023 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-2198142 URI
0247 a https://doi.org/10.5194/acp-23-6813-20232 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Gramlich, Yvette,d 1993-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)yvgr0791
2451 0a Revealing the chemical characteristics of Arctic low-level cloud residuals – in situ observations from a mountain site
264 1c 2023
338 a electronic2 rdacarrier
520 a The role aerosol chemical composition plays in Arctic low-level cloud formation is still poorly understood. In this study we address this issue by combining in situ observations of the chemical characteristics of cloud residuals (dried liquid cloud droplets or ice crystals) and aerosol particles from the Zeppelin Observatory in Ny-Ålesund, Svalbard (approx. 480 m a.s.l.). These measurements were part of the 1-year-long Ny-Ålesund Aerosol and Cloud Experiment 2019–2020 (NASCENT). To obtain the chemical composition of cloud residuals at molecular level, we deployed a Filter Inlet for Gases and AEROsols coupled to a Chemical Ionization Mass Spectrometer (FIGAERO-CIMS) with iodide as the reagent ion behind a ground-based counterflow virtual impactor (GCVI). The station was enshrouded in clouds roughly 15 % of the time during NASCENT, out of which we analyzed 14 cloud events between December 2019 and December 2020. During the entire year, the composition of the cloud residuals shows contributions from oxygenated organic compounds, including organonitrates, and traces of the biomass burning tracer levoglucosan. In summer, methanesulfonic acid (MSA), an oxidation product of dimethyl sulfide (DMS), shows large contributions to the sampled mass, indicating marine natural sources of cloud condensation nuclei (CCN) and ice nucleating particle (INP) mass during the sunlit part of the year. In addition, we also find contributions of the inorganic acids nitric acid and sulfuric acid, with outstanding high absolute signals of sulfuric acid in one cloud residual sample in spring and one in late summer (21 May and 12 September 2020), probably caused by high anthropogenic sulfur emissions near the Barents Sea and Kara Sea. During one particular cloud event, on 18 May 2020, the air mass origin did not change before, during, or after the cloud. We therefore chose it as a case study to investigate cloud impact on aerosol physicochemical properties. We show that the overall chemical composition of the organic aerosol particles was similar before, during, and after the cloud, indicating that the particles had already undergone one or several cycles of cloud processing before being measured as residuals at the Zeppelin Observatory and/or that, on the timescales of the observed cloud event, cloud processing of the organic fraction can be neglected. Meanwhile, there were on average fewer particles but relatively more in the accumulation mode after the cloud. Comparing the signals of sulfur-containing compounds of cloud residuals with aerosols during cloud-free conditions, we find that sulfuric acid had a higher relative contribution to the cloud residuals than to aerosols during cloud-free conditions, but we did not observe an increase in particulate MSA due to the cloud. Overall, the chemical composition, especially of the organic fraction of the Arctic cloud residuals, reflected the overall composition of the general aerosol population well. Our results thus suggest that most aerosols can serve as seeds for low-level clouds in the Arctic.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng
653 a Arctic
653 a clouds
653 a aerosols
653 a cloud residuals
653 a mass spectrometry
7001 a Siegel, Karolina,d 1990-u Stockholms universitet,Institutionen för miljövetenskap,Meteorologiska institutionen (MISU),Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)kase6394
7001 a Haslett, Sophie L.,d 1988-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)soha8177
7001 a Pereira Freitas, Gabriel,d 1993-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)gape7337
7001 a Krejci, Radovan,d 1970-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)krejc
7001 a Zieger, Paul,d 1978-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)pzieg
7001 a Mohr, Claudia,d 1982-u Stockholms universitet,Institutionen för miljövetenskap,Bolincentret för klimatforskning (tills m KTH & SMHI)4 aut0 (Swepub:su)cmohr
7102 a Stockholms universitetb Institutionen för miljövetenskap4 org
7730 t Atmospheric Chemistry And Physicsg 23:12, s. 6813-6834q 23:12<6813-6834x 1680-7316x 1680-7324
8564 u https://doi.org/10.5194/acp-23-6813-2023y Fulltext
8564 u https://su.diva-portal.org/smash/get/diva2:1785472/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 u https://su.diva-portal.org/smash/get/diva2:1785472/FULLTEXT02.pdfx primaryx Raw objecty fulltext:print
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-219814
8564 8u https://doi.org/10.5194/acp-23-6813-2023

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