ACP - Special issue
Re-analysis of tropospheric sulfate aerosol and ozone for the period 1980–2005 using the aerosol-chemistry-climate model ECHAM5-HAMMOZ
Atmos. Chem. Phys., 11, 9563-9594, 2011
North Atlantic Oscillation and tropospheric ozone variability in Europe: model analysis and measurements intercomparison
Atmos. Chem. Phys., 12, 6357-6376, 2012
Determinants and predictability of global wildfire emissions
Atmos. Chem. Phys., 12, 6845-6861, 2012
The direct effect of aerosols on solar radiation over the broader Mediterranean basin
Atmos. Chem. Phys., 12, 7165-7185, 2012
Simulating ultrafine particle formation in Europe using a regional CTM: contribution of primary emissions versus secondary formation to aerosol number concentrations
Atmos. Chem. Phys., 12, 8663-8677, 2012
Mapping the uncertainty in global CCN using emulation
Atmos. Chem. Phys., 12, 9739-9751, 2012
Functionalization and fragmentation during ambient organic aerosol aging: application of the 2-D volatility basis set to field studies
Atmos. Chem. Phys., 12, 10797-10816, 2012
Response of fine particulate matter concentrations to changes of emissions and temperature in Europe
Atmos. Chem. Phys., 13, 3423-3443, 2013
Semi-empirical parameterization of size-dependent atmospheric nanoparticle growth in continental environments
Atmos. Chem. Phys., 13, 7665-7682, 2013
Secondary aerosol formation from stress-induced biogenic emissions and possible climate feedbacks
Atmos. Chem. Phys., 13, 8755-8770, 2013
Chemical composition and hygroscopic properties of aerosol particles over the Aegean Sea
Atmos. Chem. Phys., 13, 11595-11608, 2013
Processing of biomass-burning aerosol in the eastern Mediterranean during summertime
Atmos. Chem. Phys., 14, 4793-4807, 2014
Evolution of the complex refractive index in the UV spectral region in ageing secondary organic aerosol
Atmos. Chem. Phys., 14, 5793-5806, 2014
Impacts of climate and emission changes on nitrogen deposition in Europe: a multi-model study
Atmos. Chem. Phys., 14, 6995-7017, 2014
OH regeneration from methacrolein oxidation investigated in the atmosphere simulation chamber SAPHIR
Atmos. Chem. Phys., 14, 7895-7908, 2014
Organic aerosol concentration and composition over Europe: insights from comparison of regional model predictions with aerosol mass spectrometer factor analysis
Atmos. Chem. Phys., 14, 9061-9076, 2014
Linking climate and air quality over Europe: effects of meteorology on PM2.5 concentrations
Atmos. Chem. Phys., 14, 10283-10298, 2014
Analysis of nucleation events in the European boundary layer using the regional aerosol–climate model REMO-HAM with a solar radiation-driven OH-proxy
Atmos. Chem. Phys., 14, 11711-11729, 2014
Biotic stress: a significant contributor to organic aerosol in Europe?
Atmos. Chem. Phys., 14, 13643-13660, 2014
Evidence for an unidentified non-photochemical ground-level source of formaldehyde in the Po Valley with potential implications for ozone production
Summary: Using measurements acquired from a Zeppelin airship during the PEGASOS 2012 campaign, we show that VOC oxidation alone cannot account for the formaldehyde concentrations observed in the morning over rural Italy. Vertical profiles suggest a ground-level source of HCHO. Incorporating this additional HCHO source into a photochemical model increases calculated O3 production by as much as 12%.
Atmos. Chem. Phys., 15, 1289-1298, 2015
Impacts of emission reductions on aerosol radiative effects
Summary: The global aerosol--climate model ECHAM-HAMMOZ is used to study the aerosol burden and forcing changes in the coming decades. We show that aerosol burdens overall can have a decreasing trend leading to reductions in the direct aerosol effect being globally 0.06--0.4W/m2 by 2030, whereas the aerosol indirect radiative effect could decline 0.25--0.82W/m2. We also show that the targeted emission reduction measures can be a much better choice for the climate than overall high reductions globally.
Atmos. Chem. Phys., 15, 5501-5519, 2015
Formation of highly oxidized multifunctional compounds: autoxidation of peroxy radicals formed in the ozonolysis of alkenes – deduced from structure–product relationships
Summary: We studied a series of cycloalkenes and methyl-substituted alkenes in order to elucidate the structural pre-requisites and chemical pathways to the recently discovered class of highly oxidized molecules ELVOC (Ehn et al., Nature, 2014). ELVOC may totally change the view on (parts of) the mechanism of SOA formation. We present results which support recent observations of H shifts from C-H to peroxy radicals, highlighting the pivotal role of peroxyradicals in organic atmospheric chemistry.
Atmos. Chem. Phys., 15, 6745-6765, 2015
Atmospheric new particle formation as a source of CCN in the eastern Mediterranean marine boundary layer
Summary: Cloud condensation nuclei (CCN) production associated with atmospheric new particle formation (NPF) is presented, and this is the first direct evidence of CCN production resulting from NPF in the eastern Mediterranean atmosphere. We show that condensation of both gaseous sulfuric acid and organic compounds from multiple sources leads to the rapid growth of nucleated particles. Sub-100nm particles were found to be substantially less hygroscopic than larger particles during the active NPF period.
Atmos. Chem. Phys., 15, 9203-9215, 2015
Modelled and observed changes in aerosols and surface solar radiation over Europe between 1960 and 2009
Summary: We evaluate HadGEM3-UKCA over Europe for the period 1960-2009 against observations of aerosol mass and number, aerosol optical depth (AOD) and surface solar radiation (SSR). The model underestimates aerosol mass and number but is less biased if compared to AOD and SSR. Observed trends in aerosols are well simulated by the model and necessary for reproducing the observed increase in SSR since 1990. European all-sky top of atmosphere aerosol radiative forcing increased by > 3 Wm-2 from 1970 to 2009.
Atmos. Chem. Phys., 15, 9477-9500, 2015
Modelling the contribution of biogenic volatile organic compounds to new particle formation in the Jülich plant atmosphere chamber
Summary: We used the ADCHAM model to study new particle formation events in the JPAC chamber. The model results show that the new particles may be formed by a kinetic type of nucleation involving both sulphuric acid and organic compounds formed from OH oxidation of volatile organic compounds (VOCs). The observed particle growth may either be controlled by the condensation of semi- and low-volatililty organic compounds or by the formation of low-volatility compounds (oligomers) at the particle surface.
Atmos. Chem. Phys., 15, 10777-10798, 2015
Organic aerosol evolution and transport observed at Mt. Cimone (2165 m a.s.l.), Italy, during the PEGASOS campaign
Summary: This work highlights the important contribution of organic aerosols to the composition of submicron particles at remote mountain sites. Moreover, it confirms the importance of regional-scale physical and chemical processes and of transboundary transport in determining the background aerosol composition at rural European sites.
Atmos. Chem. Phys., 15, 11327-11340, 2015
Sources and chemical characterization of organic aerosol during the summer in the eastern Mediterranean
Summary: The concentration and chemical composition of fine particulate matter were measured during the summer of 2012 in two Greek cities, Patras and Athens. The composition of PM1 was surprisingly similar in both areas, demonstrating the importance of regional sources. Analysis of the Aerosol Mass Spectrometer data suggested that the contribution of the primary sources to organic aerosol was important (22% in Patras and 35% in Athens) but not dominant.
Atmos. Chem. Phys., 15, 11355-11371, 2015
Technical note: New particle formation event forecasts during PEGASOS–Zeppelin Northern mission 2013 in Hyytiälä, Finland
Atmos. Chem. Phys., 15, 12385-12396, 2015