0000000000623945

AUTHOR

B. Sierau

showing 3 related works from this author

General overview: European Integrated project on Aerosol Cloud Climate and Air Quality interactions (EUCAARI)-integrating aerosol research from nano …

2011

In this paper we describe and summarize the main achievements of the European Aerosol Cloud Climate and Air Quality Interactions project (EUCAARI). EUCAARI started on 1 January 2007 and ended on 31 December 2010 leaving a rich legacy including: (a) a comprehensive database with a year of observations of the physical, chemical and optical properties of aerosol particles over Europe, (b) comprehensive aerosol measurements in four developing countries, (c) a database of airborne measurements of aerosols and clouds over Europe during May 2008, (d) comprehensive modeling tools to study aerosol processes fron nano to global scale and their effects on climate and air quality. In addition a new Pan…

Atmospheric ScienceEuropean aerosol010504 meteorology & atmospheric sciencesaerosolAerosol radiative forcingClimateclouds010501 environmental sciencesAtmospheric sciences01 natural scienceslcsh:Chemistry/dk/atira/pure/sustainabledevelopmentgoals/climate_actionAerosol cloud11. SustainabilitySDG 13 - Climate Actionddc:550particle propertiesEnvironmental policysaturation vapor-pressureschemical-transport modelMiljövetenskapair qualitylcsh:QC1-999General Circulation Model/dk/atira/pure/subjectarea/asjc/1900/1902EUCAARIEELS - Earth Environmental and Life SciencesION-INDUCED NUCLEATIONChemical transport modelMeteorologyEarth & EnvironmentEnergy / Geological Survey NetherlandsSIMULATION CHAMBER SAPHIRnuclei number concentrationSECONDARY ORGANIC AEROSOLpure component propertiesAir quality indexEnvironmental quality0105 earth and related environmental sciencesPARTICLE FORMATION EVENTSAtmosphärische Spurenstoffe[CHIM.CATA]Chemical Sciences/CatalysisCAS - Climate Air and Sustainability[SDE.ES]Environmental Sciences/Environmental and SocietyFalconAerosollcsh:QD1-99913. Climate actionmixed-phase cloudsEnvironmental scienceatmospheric sulfuric-acidEnvironmental Scienceslcsh:Physics
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HNO3 partitioning in cirrus clouds

1999

During the 1997 POLSTAR-1 winter campaign in northern Sweden a flight was performed across a cold trough of air (similar or equal to 196 K) in the tropopause region. Measurements of total water vapour, nitric acid, particles and reactive nitrogen (NOy) were taken. The particle measurements indicate that about 3% of the particles in the moist tropospheric air were ice particles. Forward and backward facing NOy inlets were used simultaneously to determine condensed phase HNO3. The combined NOy and particle measurements reveal that less than 1% of a monolayer of NOy could have resided on the ice particles. This casts doubt on the hypothesis that sedimenting cirrus particles generally lead to a…

Ice cloudReactive nitrogenAtmospheric sciencesJTropospherechemistry.chemical_compoundGeophysicschemistryNitric acidddc:550General Earth and Planetary SciencesEnvironmental scienceCirrusNitrogen oxideTropopauseWater vapor
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Surface modification of mineral dust particles by sulphuric acid processing: implications for CCN and IN abilities

2011

Abstract. The ability of coated mineral dust particles to act as cloud condensation nuclei (CCN) and ice nuclei (IN) was investigated at LACIS (Leipzig Aerosol Cloud Interaction Simulator) during the FROST1- and FROST2-campaigns (Freezing of dust). Sulphuric acid was condensed on the particles which afterwards were optionally humidified, treated with ammonia vapour and/or heat. By means of aerosol mass spectrometry we found evidence that processing of mineral dust particles with sulphuric acid leads to surface modifications of the particles. These surface modifications are responsible for the observed reduction of the IN activation of the particles. The observed particle mass spectra sugges…

ddc:550complex mixtures
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