Experimental studies on cloud condensation nuclei activation and cloud microphysical properties
Atmospheric aerosol particles have the ability to affect climate through cloud interactions and direct scattering and absorption of radiation. These aerosol particles can also affect human health through respiratory system. Aerosol particles are emitted to the atmosphere through direct sources or th...
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Finnish Meteorological Institute
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/357037 2023-08-20T04:04:56+02:00 Experimental studies on cloud condensation nuclei activation and cloud microphysical properties Doulgeris, Konstantinos-Matthaios 2023-04-17T07:22:56Z application/pdf http://hdl.handle.net/10138/357037 eng eng Finnish Meteorological Institute Ilmatieteen laitos 10.35614/isbn.9789523361713 Finnish Meteorological Institute Contributions 186 0782-6117 2814-5658 978-952-336-170-6 978-952-336-171-3 http://hdl.handle.net/10138/357037 aerosols clouds atmosphere climate changes climate air pollution cloud condensation nuclei cloud droplets arctic regions Thesis 2023 ftunivhelsihelda 2023-07-28T06:37:23Z Atmospheric aerosol particles have the ability to affect climate through cloud interactions and direct scattering and absorption of radiation. These aerosol particles can also affect human health through respiratory system. Aerosol particles are emitted to the atmosphere through direct sources or they can be formed through chemical processes from gas phase precursors. The different atmospheric processes and climate feedbacks of aerosol particles can be studied using process-scale models as well as larger global-scale models. In recent years, it has been found out that certain aerosol species lack information on their thermodynamic properties, causing uncertainties in process-scale modelling as well as global-scale modelling. In addition, transport of aerosols to remote regions, where emissions of aerosol particles are low, is poorly modelled in global-scale models. Furthermore, sources for formed secondary organic aerosol (SOA) include uncertainties in global aerosol-climate models, which causes uncertainty to estimating the radiative forcing (RF). In this thesis, these aspects relating to uncertainties are addressed using process and global-scale modelling. This was done first by evaluating the capability of thermodynamic equilibrium model to reproduce observed hygroscopicity in terms of dimethylamine, sulfuric acid and ammonia containing particles. Second, an in-cloud wet deposition scheme was developed (hereafter referred to as the newly-developed scheme) for global models which use sectional aerosol description. The newlydeveloped wet deposition scheme was tested using ECHAM-HAMMOZ global aerosol-climate model with Sectional Aerosol model for Large-Scale Applications (SALSA) in terms of aerosol vertical distributions and lifetimes. Third, the biotic stress effects to trees over boreal region and their effects to SOA formation, clouds and radiative effects were studied using ECHAM-HAMMOZ with SALSA. The results showed that when the thermodynamic equilibrium model was used to model particles with sizes of the ... Thesis Arctic Human health Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Arctic |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
aerosols clouds atmosphere climate changes climate air pollution cloud condensation nuclei cloud droplets arctic regions |
spellingShingle |
aerosols clouds atmosphere climate changes climate air pollution cloud condensation nuclei cloud droplets arctic regions Doulgeris, Konstantinos-Matthaios Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
topic_facet |
aerosols clouds atmosphere climate changes climate air pollution cloud condensation nuclei cloud droplets arctic regions |
description |
Atmospheric aerosol particles have the ability to affect climate through cloud interactions and direct scattering and absorption of radiation. These aerosol particles can also affect human health through respiratory system. Aerosol particles are emitted to the atmosphere through direct sources or they can be formed through chemical processes from gas phase precursors. The different atmospheric processes and climate feedbacks of aerosol particles can be studied using process-scale models as well as larger global-scale models. In recent years, it has been found out that certain aerosol species lack information on their thermodynamic properties, causing uncertainties in process-scale modelling as well as global-scale modelling. In addition, transport of aerosols to remote regions, where emissions of aerosol particles are low, is poorly modelled in global-scale models. Furthermore, sources for formed secondary organic aerosol (SOA) include uncertainties in global aerosol-climate models, which causes uncertainty to estimating the radiative forcing (RF). In this thesis, these aspects relating to uncertainties are addressed using process and global-scale modelling. This was done first by evaluating the capability of thermodynamic equilibrium model to reproduce observed hygroscopicity in terms of dimethylamine, sulfuric acid and ammonia containing particles. Second, an in-cloud wet deposition scheme was developed (hereafter referred to as the newly-developed scheme) for global models which use sectional aerosol description. The newlydeveloped wet deposition scheme was tested using ECHAM-HAMMOZ global aerosol-climate model with Sectional Aerosol model for Large-Scale Applications (SALSA) in terms of aerosol vertical distributions and lifetimes. Third, the biotic stress effects to trees over boreal region and their effects to SOA formation, clouds and radiative effects were studied using ECHAM-HAMMOZ with SALSA. The results showed that when the thermodynamic equilibrium model was used to model particles with sizes of the ... |
format |
Thesis |
author |
Doulgeris, Konstantinos-Matthaios |
author_facet |
Doulgeris, Konstantinos-Matthaios |
author_sort |
Doulgeris, Konstantinos-Matthaios |
title |
Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
title_short |
Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
title_full |
Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
title_fullStr |
Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
title_full_unstemmed |
Experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
title_sort |
experimental studies on cloud condensation nuclei activation and cloud microphysical properties |
publisher |
Finnish Meteorological Institute |
publishDate |
2023 |
url |
http://hdl.handle.net/10138/357037 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Human health |
genre_facet |
Arctic Human health |
op_relation |
10.35614/isbn.9789523361713 Finnish Meteorological Institute Contributions 186 0782-6117 2814-5658 978-952-336-170-6 978-952-336-171-3 http://hdl.handle.net/10138/357037 |
_version_ |
1774715362400534528 |