Chemical composition of Arctic aerosols and their link to clouds
The Arctic is a place particularly vulnerable to climate change, warming at an accelerated rate compared to the rest of the Earth. In this remote environment, the atmosphere, the ocean, the ice, and the land are all interlinked and are shaping a very complex system. This is why the interplay between...
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Stockholms universitet, Institutionen för miljövetenskap
2023
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ftstockholmuniv:oai:DiVA.org:su-219823 2023-09-05T13:16:21+02:00 Chemical composition of Arctic aerosols and their link to clouds Gramlich, Yvette 2023 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-219823 eng eng Stockholms universitet, Institutionen för miljövetenskap Stockholm : Department of Environmental Science, Stockholm University orcid:0000-0002-1116-7653 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-219823 urn:isbn:978-91-8014-440-7 urn:isbn:978-91-8014-441-4 info:eu-repo/semantics/openAccess Arctic aerosols cloud residuals mass spectrometry biomass burning Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Doctoral thesis, comprehensive summary info:eu-repo/semantics/doctoralThesis text 2023 ftstockholmuniv 2023-08-23T22:31:12Z The Arctic is a place particularly vulnerable to climate change, warming at an accelerated rate compared to the rest of the Earth. In this remote environment, the atmosphere, the ocean, the ice, and the land are all interlinked and are shaping a very complex system. This is why the interplay between aerosols and clouds and their role in the warming Arctic is still not fully understood. To address this issue, a better understanding of the sources, properties, and fate of aerosol particles in the Arctic is needed. By means of in situ observations of aerosols and clouds at the Zeppelin Observatory on Svalbard, this thesis aims to shed light on aerosol-cloud interactions in the Arctic. These measurements were conducted within the framework of the one-year long Ny-Ålesund Aerosol Cloud Experiment (2019-2020). A special focus of this thesis is on the chemical composition of aerosol particles from a molecular-level perspective, where measurements from a filter inlet for gases and aerosols coupled to a chemical ionization mass spectrometer were used. To identify the properties of the aerosol particles serving as cloud condensation nuclei (CCN) or ice nucleating particles (INP), cloud droplets and ice crystals were sampled with a ground-based counterflow virtual impactor inlet. The measured particles are called cloud residuals. The observations show that the cloud residuals have sizes in the Aitken and accumulation mode (as small as 10 nm in diameter). The chemical composition of these cloud residuals followed largely the expected annual cycle of aerosol particles in the Arctic, suggesting that most of the aerosol particles can act as CCN or INP in the Arctic. Anthropogenic signatures were present in the cloud residuals in the winter and spring, whereas in the summer a large contribution from methanesulfonic acid (MSA) was present, indicating natural source regions. The thesis also investigated how the oxidation products of dimethyl sulfide, MSA, sulfuric acid, and hydroperoxymethyl thioformate (HPMTF) are related to ... Doctoral or Postdoctoral Thesis Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard Stockholm University: Publications (DiVA) Arctic Svalbard Ny-Ålesund Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Arctic aerosols cloud residuals mass spectrometry biomass burning Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
spellingShingle |
Arctic aerosols cloud residuals mass spectrometry biomass burning Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Gramlich, Yvette Chemical composition of Arctic aerosols and their link to clouds |
topic_facet |
Arctic aerosols cloud residuals mass spectrometry biomass burning Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
description |
The Arctic is a place particularly vulnerable to climate change, warming at an accelerated rate compared to the rest of the Earth. In this remote environment, the atmosphere, the ocean, the ice, and the land are all interlinked and are shaping a very complex system. This is why the interplay between aerosols and clouds and their role in the warming Arctic is still not fully understood. To address this issue, a better understanding of the sources, properties, and fate of aerosol particles in the Arctic is needed. By means of in situ observations of aerosols and clouds at the Zeppelin Observatory on Svalbard, this thesis aims to shed light on aerosol-cloud interactions in the Arctic. These measurements were conducted within the framework of the one-year long Ny-Ålesund Aerosol Cloud Experiment (2019-2020). A special focus of this thesis is on the chemical composition of aerosol particles from a molecular-level perspective, where measurements from a filter inlet for gases and aerosols coupled to a chemical ionization mass spectrometer were used. To identify the properties of the aerosol particles serving as cloud condensation nuclei (CCN) or ice nucleating particles (INP), cloud droplets and ice crystals were sampled with a ground-based counterflow virtual impactor inlet. The measured particles are called cloud residuals. The observations show that the cloud residuals have sizes in the Aitken and accumulation mode (as small as 10 nm in diameter). The chemical composition of these cloud residuals followed largely the expected annual cycle of aerosol particles in the Arctic, suggesting that most of the aerosol particles can act as CCN or INP in the Arctic. Anthropogenic signatures were present in the cloud residuals in the winter and spring, whereas in the summer a large contribution from methanesulfonic acid (MSA) was present, indicating natural source regions. The thesis also investigated how the oxidation products of dimethyl sulfide, MSA, sulfuric acid, and hydroperoxymethyl thioformate (HPMTF) are related to ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Gramlich, Yvette |
author_facet |
Gramlich, Yvette |
author_sort |
Gramlich, Yvette |
title |
Chemical composition of Arctic aerosols and their link to clouds |
title_short |
Chemical composition of Arctic aerosols and their link to clouds |
title_full |
Chemical composition of Arctic aerosols and their link to clouds |
title_fullStr |
Chemical composition of Arctic aerosols and their link to clouds |
title_full_unstemmed |
Chemical composition of Arctic aerosols and their link to clouds |
title_sort |
chemical composition of arctic aerosols and their link to clouds |
publisher |
Stockholms universitet, Institutionen för miljövetenskap |
publishDate |
2023 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-219823 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Arctic Svalbard Ny-Ålesund Aitken |
geographic_facet |
Arctic Svalbard Ny-Ålesund Aitken |
genre |
Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard |
genre_facet |
Arctic Climate change Ny Ålesund Ny-Ålesund Svalbard |
op_relation |
orcid:0000-0002-1116-7653 http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-219823 urn:isbn:978-91-8014-440-7 urn:isbn:978-91-8014-441-4 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1776197973225504768 |