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Long-term measurements of aerosol optical properties and modeled aerosol transport paths at Dome C, Antarctica
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för miljövetenskap och analytisk kemi. Finnish Meteorological Institute (FMI), Finland; Norwegian Institute for Air Research (NILU), Norway.ORCID-id: 0000-0001-5074-4858
Visa övriga samt affilieringar
(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Nationell ämneskategori
Meteorologi och atmosfärforskning
Forskningsämne
tillämpad miljövetenskap
Identifikatorer
URN: urn:nbn:se:su:diva-138893OAI: oai:DiVA.org:su-138893DiVA, id: diva2:1069633
Tillgänglig från: 2017-01-30 Skapad: 2017-01-27 Senast uppdaterad: 2017-02-13Bibliografiskt granskad
Ingår i avhandling
1. Quantification of sources and removal mechanisms of atmospheric aerosol particles
Öppna denna publikation i ny flik eller fönster >>Quantification of sources and removal mechanisms of atmospheric aerosol particles
2017 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The focus of this work has been to quantify important processes for climatically relevant aerosols, and to improve our understanding of, and ability to accurately model, aerosols in the atmosphere on a large scale. This thesis contains five papers focused on different parts of the life cycle of atmospheric aerosol particles. Two papers describe the physical process of emission of primary marine aerosols. The large uncertainties in these processes are demonstrated by examining the diversity of existing parameterizations for emissions. Building from laboratory experiments to validation of model results with observations, new parameterizations are suggested. These take into account also effects of water temperature on primary marine aerosol production. In the third paper the main focus was to develop a new aerosol wet removal scheme in the Lagrangian transport and dispersion model FLEXPART. Removal timescales and atmospheric concentrations are found to be close to observation based estimates. The final two papers focus on atmospheric black carbon aerosols at high latitudes. As an example of increased human activities in the Arctic, local emissions from cruise ships visiting the research base in Ny Ålesund had demonstrable effects on the level of pollutants measured there. In contrast, inland Antarctic air was shown to be clean compared to the Arctic, due to the extremely long transport time from any major aerosol sources. The work done in this thesis has addressed critical uncertainties regarding the aerosol lifecycle, by better constraining aerosol emissions and atmospheric lifetimes. The development of the new wet removal scheme has improved FLEXPART model accuracy, which will be beneficial in future applications of the model.

Ort, förlag, år, upplaga, sidor
Stockholm: Department of Environmental Science and Analytical Chemistry, Stockholm University, 2017. s. 54
Nyckelord
aerosol, aerosol removal, aerosol emission, aerosol sources, FLEXPART, Arctic aerosol
Nationell ämneskategori
Miljövetenskap
Forskningsämne
tillämpad miljövetenskap
Identifikatorer
urn:nbn:se:su:diva-138903 (URN)978-91-7649-669-5 (ISBN)978-91-7649-670-1 (ISBN)
Disputation
2017-03-17, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 10:00 (Engelska)
Opponent
Handledare
Anmärkning

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 3: Manuscript.

Tillgänglig från: 2017-02-22 Skapad: 2017-01-30 Senast uppdaterad: 2017-02-16Bibliografiskt granskad

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Grythe, Henrik
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Institutionen för miljövetenskap och analytisk kemi
Meteorologi och atmosfärforskning

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