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    Academic Journals

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• How alkaline compounds control atmospheric aerosol particle acidity.

  Authors:Vlassis A. Karydis, Alexandra P. Tsimpidi, Andrea Pozzer, and Jos LelieveldFrom:Atmospheric Chemistry and Physics (Vol. 21, Issue 20) Peer-Reviewed

  Oct. 15, 2021246 words Brief article The acidity of atmospheric particulate matter regulates its mass, composition, and toxicity and has important consequences for public health, ecosystems and climate. Despite these broad impacts, the global distribution...

• Response of inorganic fine particulate matter to emission changes of sulfur dioxide and ammonia: the eastern United States as a case study

  Authors:Alexandra P. Tsimpidi, Vlassis A. Karydis, and Spyros N. PandisFrom:Journal of the Air & Waste Management Association (Vol. 57, Issue 12) Peer-Reviewed

  Dec. 20076,440 words Case study 1510LABSTRACT A three-dimensional chemical transport model (PMCAMx) was used to investigate changes in fine particle ([PM.sub.2.5]) concentrations in response to changes in sulfur dioxide (S[O.sub.2]) and ammonia...

• Weaker cooling by aerosols due to dust-pollution interactions.

  Authors:Klaus Klingmüller, Vlassis A. Karydis, Sara Bacer, Georgiy L. Stenchikov, and Jos LelieveldFrom:Atmospheric Chemistry and Physics (Vol. 20, Issue 23) Peer-Reviewed

  Dec. 9, 2020196 words Brief article The interactions between aeolian dust and anthropogenic air pollution, notably chemical ageing of mineral dust and coagulation of dust and pollution particles, modify the atmospheric aerosol composition and burden. Since...

• Global impact of mineral dust on cloud droplet number concentration

  Authors:Vlassis A. Karydis, Alexandra P. Tsimpidi, Sara Bacer, Andrea Pozzer, Athanasios Nenes, and Jos LelieveldFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 9) Peer-Reviewed

  May 3, 2017409 words Author abstract, Bri... The importance of wind-blown mineral dust for cloud droplet formation is studied by considering (i) the adsorption of water on the surface of insoluble particles, (ii) particle coating by soluble...

• Evaluation of global simulations of aerosol particle and cloud condensation nuclei number, with implications for cloud droplet formation

  Authors:George S. Fanourgakis, Maria Kanakidou, Athanasios Nenes, Susanne E. Bauer, Tommi Bergman, Ken S. Carslaw, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 13) Peer-Reviewed

  July 8, 2019690 words Brief article

  A total of 16 global chemistry transport models and general circulation models have participated in this study; 14 models have been evaluated with regard to their ability to reproduce the near-surface observed number...

• Global-scale combustion sources of organic aerosols: sensitivity to formation and removal mechanisms

  Authors:Alexandra P. Tsimpidi, Vlassis A. Karydis, Spyros N. Pandis, and Jos LelieveldFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 12) Peer-Reviewed

  June 20, 2017205 words Author abstract, Bri... Organic compounds from combustion sources such as biomass burning and fossil fuel use are major contributors to the global atmospheric load of aerosols. We analyzed the sensitivity of model-predicted global-scale...

• ORACLE 2-D (v2.0): an efficient module to compute the volatility and oxygen content of organic aerosol with a global chemistry-climate model

  Authors:Alexandra P. Tsimpidi, Vlassis A. Karydis, Andrea Pozzer, Spyros N. Pandis, and Jos LelieveldFrom:Geoscientific Model Development (Vol. 11, Issue 8) Peer-Reviewed

  Aug. 21, 2018253 words Author abstract, Bri...

  A new module, ORACLE 2-D, simulating organic aerosol formation and evolution in the atmosphere has been developed and evaluated. The module calculates the concentrations of surrogate organic species in...

• Quantifying uncertainties due to chemistry modelling - evaluation of tropospheric composition simulations in the CAMS model (cycle 43R1)

  Authors:Vincent Huijnen, Andrea Pozzer, Joaquim Arteta, Guy Brasseur, Idir Bouarar, Simon Chabrillat, et al.From:Geoscientific Model Development (Vol. 12, Issue 4) Peer-Reviewed

  Apr. 30, 2019316 words Author abstract, Bri...

  We report on an evaluation of tropospheric ozone and its precursor gases in three atmospheric chemistry versions as implemented in the European Centre for Medium-Range Weather Forecasts (ECMWF) Integrated Forecasting...

• Revised mineral dust emissions in the atmospheric chemistry-climate model EMAC (MESSy 2.52 DU_Astitha1 KKDU2017 patch)

  Authors:Swen Metzger, Mohamed Abdelkader, Vlassis A. Karydis, Georgiy L. Stenchikov, Andrea Pozzer, and Jos LelieveldFrom:Geoscientific Model Development (Vol. 11, Issue 3) Peer-Reviewed

  Mar. 16, 201850 words Author abstract, Bri... Byline: Klaus Klingmü,ller, Swen Metzger, Mohamed Abdelkader, Vlassis A. Karydis, Georgiy L. Stenchikov, Andrea Pozzer, Jos Lelieveld To access, purchase, authenticate, or subscribe to the full-text of this...

• Modeling the aerosol chemical composition of the tropopause over the Tibetan Plateau during the Asian summer monsoon

  Authors:Jianzhong Ma, Qianshan He, Benedikt Steil, Vlassis A. Karydis, Holger Tost, Bin Chen, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 17) Peer-Reviewed

  Sept. 13, 2019370 words Brief article

  Enhanced aerosol abundance in the upper troposphere and lower stratosphere (UTLS) associated with the Asian summer monsoon (ASM) is referred to as the Asian Tropopause Aerosol Layer (ATAL). The chemical composition,...

• Predictions of diffusion rates of large organic molecules in secondary organic aerosols using the Stokes-Einstein and fractional Stokes-Einstein relations

  Authors:Erin Evoy, Adrian M. Maclean, Grazia Rovelli, Ying Li, Alexandra P. Tsimpidi, Vlassis A. Karydis, et al.From:Atmospheric Chemistry and Physics (Vol. 19, Issue 15) Peer-Reviewed

  Aug. 9, 2019305 words Author abstract, Bri...

  Information on the rate of diffusion of organic molecules within secondary organic aerosol (SOA) is needed to accurately predict the effects of SOA on climate and air quality. Diffusion can be important for...

• Response of Fine Particulate Matter to emission changes of oxides of nitrogen and anthropogenic volatile organic compounds in the eastern United States

  Authors:Alexandra P. Tsimpidi, Vlassis A. Karydis, and Spyros N. PandisFrom:Journal of the Air & Waste Management Association (Vol. 58, Issue 11) Peer-Reviewed

  Nov. 20087,113 words Report ABSTRACT A three-dimensional chemical transport model (Particulate Matter Comprehensive Air Quality Model with Extensions [PMCAMx]) is used to investigate changes in fine particle ([PM.sub.2.5]) concentrations in...

• The community atmospheric chemistry box model CAABA/MECCA-4.0

  Authors:Rolf Sander, Andreas Baumgaertner, David Cabrera-Perez, Franziska Frank, Sergey Gromov, Jens-Uwe Grooss, et al.From:Geoscientific Model Development (Vol. 12, Issue 4) Peer-Reviewed

  Apr. 5, 201969 words Author abstract, Bri... Byline: Rolf Sander, Andreas Baumgaertner, David Cabrera-Perez, Franziska Frank, Sergey Gromov, Jens-Uwe GrooÃ,Ÿ,, Hartwig Harder, Vincent Huijnen, Patrick Jö,ckel, Vlassis A. Karydis, Kyle E. Niemeyer,...

• Implementation of a comprehensive ice crystal formation parameterization for cirrus and mixed-phase clouds in the EMAC model (based on MESSy 2.53)

  Authors:Sara Bacer, Sylvia C. Sullivan, Vlassis A. Karydis, Donifan Barahona, Martina Kramer, Athanasios Nenes, et al.From:Geoscientific Model Development (Vol. 11, Issue 10) Peer-Reviewed

  Oct. 5, 2018255 words Author abstract, Bri...

  A comprehensive ice nucleation parameterization has been implemented in the global chemistry-climate model EMAC to improve the representation of ice crystal number concentrations (ICNCs). The parameterization of...

• Direct radiative effect of dust-pollution interactions

  Authors:Klaus Klingmuller, Jos Lelieveld, Vlassis A. Karydis, and Georgiy L. StenchikovFrom:Atmospheric Chemistry and Physics (Vol. 19, Issue 11) Peer-Reviewed

  June 4, 2019254 words Author abstract, Bri...

  The chemical ageing of aeolian dust, through interactions with air pollution, affects the optical and hygroscopic properties of the mineral particles and hence their atmospheric residence time and climate forcing....

• Impact of agricultural emission reductions on fine-particulate matter and public health

  Authors:Andrea Pozzer, Alexandra P. Tsimpidi, Vlassis A. Karydis, Alexander de Meij, and Jos LelieveldFrom:Atmospheric Chemistry and Physics (Vol. 17, Issue 20) Peer-Reviewed

  Oct. 27, 2017238 words Brief article A global chemistry-climate model has been used to study the impacts of pollutants released by agriculture on fine-particulate matter (PM.sub.2.5 ), with a focus on Europe, North America, East and South Asia. Simulations...