The global 3-D distribution of tropospheric aerosols as characterized by CALIOP

Spatial and seasonal distribution of Arctic aerosols observed by the CALIOP satellite instrument ( 2006 – 2012 )

Assessment of the global impact of aerosols on tropospheric oxidants

[1] We present here a fully coupled global aerosol and chemistry model for the troposphere. The model is used to assess the interactions between aerosols and chemical oxidants in the troposphere, including (1) the conversion from gas-phase oxidants into the condensed phase during the formation of aerosols, (2) the heterogeneous reactions occurring on the surface of aerosols, and (3) the effect ...

Ion-mediated nucleation as an important global source of tropospheric aerosols

Aerosol nucleation events have been observed at a variety of locations worldwide, and may have significant climatic and health implications. While ions have long been suggested as favorable nucleation embryos, their significance as a global source of particles has remained uncertain. Here, an ion-mediated nucleation (IMN) mechanism, which incorporates new thermodynamic data and physical algorit...

Highly resolved global distribution of tropospheric NO2

The Global Ozone Monitoring Experiment (GOME, since 1995) allows the retrieval of global total column densities of atmospheric trace gases, including NO 2. Tropospheric vertical column densities (VCDs) are derived by estimating the stratospheric fraction from measurements over the remote ocean. Mean maps of tropospheric NO 2 VCDs 5 derived from GOME clearly allow to detect regions with enhanced...

Nitrate aerosols today and in 2030: a global simulation including aerosols and tropospheric ozone

Nitrate aerosols are expected to become more important in the future atmosphere due to the expected increase in nitrate precursor emissions and the decline of ammoniumsulphate aerosols in wide regions of this planet. The GISS climate model is used in this study, including atmospheric gasand aerosol phase chemistry to investigate current and future (2030, following the SRES A1B emission scenario...