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Second-generation products contribute substantially to the particle-phase organic material produced by β-caryophyllene ozonolysis
the particle-phase organic material β-caryophyllene ozonolysis
2011/1/19
The production of secondary organic aerosol (SOA) by the dark ozonolysis of gas-phase β-caryophyllene was studied. The experiments were conducted in a continuous-flow environmental chamber for organic...
Direct satellite observation of lightning-produced NOx
Direct satellite observation lightning-produced NOx
2010/11/30
In this study we present a systematic analysis of NO2 column densities from SCIAMACHY measurements over active thunderstorms, as detected by the World-Wide Lightning Location Network (WWLLN), where th...
Cloud droplet activation of mixed organic-sulfate particles produced by the photooxidation of isoprene
Cloud droplet mixed organic-sulfate particles the photooxidation of isoprene
2010/8/12
The cloud condensation nuclei (CCN) properties of ammonium sulfate particles mixed with organic material condensed during the hydroxyl-radical-initiated photooxidation of isoprene (C5H8) were investig...
Lightning-produced NOx during the Northern Australian monsoon; results from the ACTIVE campaign
Lightning-produced NOx Northern Australian monsoon ACTIVE campaign
2009/10/9
Measurements of nitrogen oxides onboard a high altitude aircraft were carried out for the first time during the Northern Australian monsoon in the framework of the Aerosol and Chemical Transport in Tr...
Energetic particle precipitation in ECHAM5/MESSy1 – Part 1: Downward transport of upper atmospheric NOx produced by low energy electrons
ECHAM5/MESSy1 upper atmospheric NOx low energy electrons
2009/5/6
The atmospheric chemistry general circulation model ECHAM5/MESSy1 has been extended by processes that parameterise particle precipitation. Several types of particle precipitation that directly affect ...
Sensitivity of satellite observations for freshly produced lightning NOx
Sensitivity satellite observations lightning NOx
2009/3/13
In this study, we analyse the sensitivity of nadir viewing satellite observations in the visible range to freshly produced lightning NOx. This is a particular challenge due to the complex and highly v...
Negatively charged nanoparticles produced by splashing of water
Negatively charged nanoparticles splashing water
2009/3/12
The production of splashing-generated balloelectric intermediate ions was studied by means of mobility spectrometry in the atmosphere during the rain and in a laboratory experiment simulating the heav...
Suppression of chlorine activation on aviation-produced volatile particles
chlorine activation aviation-produced volatile particles
2009/3/12
We examine the effect of nanometer-sized aircraft-induced aqueous sulfuric acid (H2SO4/H2O) particles on atmospheric ozone as a function of temperature. Our calculations are based on a previously deri...
Major solar eruptions (coronal mass ejections) are accompanied by massive ejections of protons. When these charged particles head for the Earth through the interplanetary magnetic field with high flux...
The effects of lightning-produced NOx and its vertical distribution on atmospheric chemistry: sensitivity simulations with MATCH-MPIC
lightning-produced NOx vertical distribution atmospheric chemistry MATCH-MPIC
2009/2/12
The impact of different assumptions concerning the source magnitude as well as the vertical placement of lightning-produced nitrogen oxides is studied using the global chemistry transport model MATCH-...
Wind-profiler observations of gravity waves produced by convection at mid-latitudes
Wind-profiler observations gravity waves convection mid-latitudes
2009/1/13
This work presents a case study which includes regions of large rapidly varying vertical velocities observed by a VHF wind-profiler at Aberystwyth (52.4° N, 4.1° W). Analysis indicates that this regio...
Estimating the NOx produced by lightning from GOME and NLDN data: a case study in the Gulf of Mexico
NOx GOME NLDN Gulf of Mexico
2009/1/5
Nitrogen oxides (NOxNO+NO2) play an important role in tropospheric chemistry, in particular in catalytic ozone production. Lightning provides a natural source of nitrogen oxides, dominating the produc...
Vertical profiles of lightning-produced NO2 enhancements in the upper troposphere observed by OSIRIS
NO2 enhancement upper troposphere OSIRIS
2008/12/17
The purpose of this study is to perform a global search of the upper troposphere (z≥10 km) for enhancements of nitrogen dioxide and determine their sources. This is the first application of satellite-...
Lightning-produced NOx over Brazil during TROCCINOX: airborne measurements in tropical and subtropical thunderstorms and the importance of mesoscale convective systems
NOx Brazil airborne measurements subtropical thunderstorms mesoscale convective systems
2008/12/11
During the TROCCINOX field experiments in February–March 2004 and February 2005, airborne in situ measurements of NO, NOy, CO, and O3 mixing ratios and the J(NO2) photolysis rate were carried out in t...
Lightning-produced NO2 observed by two ground-based UV-visible spectrometers at Vanscoy, Saskatchewan in August 2004
Lightning-produced NO2 UV-visible spectrometer Vanscoy Saskatchewan
2008/12/4
Ground-based measurements of ozone and NO2 differential slant columns by the SAOZ (Système d'Analyse par Observations Zénithales) and UT-GBS (University of Toronto Ground-Based Spectrometer) instrume...