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Oxidative Chemisty of the Troposphere

In the laboratory and in the field, we are studying the oxidative chemistry of atmospheric trace gases. The aim of this work is to better elucidate the coupling of radiation, climate, and chemistry in the troposphere.  We have also developed new mass spectroscopy methods for airborne, ground-based, and laboratory measurements of acids, peroxides and other oxygenated volatile organic compounds.  Our research group has been involved in many large field campaigns including:



Observations of heterogeneous reactions between Asian pollution and mineral dust over the Eastern North Pacific during INTEX-B 

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tc4_logo_sm.jpgTropical Composition Cloud and Climate Coupling.








Bearpex 2007 and 2009
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blodgett.jpg  Bearpex, or the Biosphere Effects on Aerosols and Photochemisty Experiment, is a
  measurement campaign scheduled for summers 2007 and 2009 at the UC Berkeley Blodgett
  Forest Station (UC-BFRS).

  http://www.ocf.berkeley.edu/%7Ebearpex/index.htm (picture from Bearpex website)


  Some additional pictures of the campaign http://picasaweb.google.com/fabienpaulot/Bearpex#


 Caltech-CIMS data from BEARPEX is available for download here.


CalNex-San Joaquin Valley






dc3_logo.gifDeep Convective Clouds and Chemistry








The Deep Convective Clouds and Chemistry (DC3) Field Campaign



SEAC4RS_250.pngSoutheast Asia Composition, Cloud, Climate Coupling Regional Study






Hydroxy nitrate production in the OH-initiated oxidation of alkenes








Chamber Measurements to support field campaigns


Mini Chamber Publications:

Peroxy radical isomerization in the oxidation of isoprene

Photolysis, OH reactivity and ozone reactivity of a proxy for isoprene-derived hydroperoxyenals (HPALDs)  

Atmospheric Fate of Methacrolein. 1. Peroxy Radical Isomerization Following Addition of OH and O2 

Autoxidation in  of Organic Compounds in the Atmosphere

Gas Phase Production and Loss of Isoprene Epoxydiols

On Rates and Mechanisms of OH and O3 Reactions with Isoprene-Derived Hydroxy Nitrates 

Atmospheric Fate of Methyl Vinyl Ketone: Peroxy Radical Reactions with NO and HO2

Hydroxy nitrate production in the OH-initiated oxidation of alkenes 

Production and Fate of C4 Dihydroxycarbonyl Compounds from Isoprene Oxidation

Kinetics and Products of the Reaction of the First-Generation Isoprene Hydroxy Hydroperoxide (ISOPOOH) with OH

Investigation of a potential HCHO measurement artifact from ISOPOOH

Isoprene Peroxy Radical Dynamics

Atmospheric autoxidation is increasingly important in urban and suburban North America 

Kinetics and Product Yields of the OH Initiated Oxidation of Hydroxymethyl Hydroperoxide 

Intramolecular Hydrogen Shift Chemistry of Hydroperoxy-Substituted Peroxy Radicals

Unimoecular Reactions of Peroxy Radicals Formed in the Oxidation of α-Pinene and β-Pinene by Hydroxyl Radicals



Large Chamber Publications:

Unexpected Epoxide Formation in the Gas-Phase Photooxidation of Isoprene 

Secondary organic aerosol (SOA) formation from reaction of isoprene with nitrate radicals (NO3) 

Effect of NOx level on secondary organic aerosol (SOA) formation from the photooxidation of terpene

Conversion of hydroperoxides to carbonyls in field and laboratory instrumentation: Observational bias in diagnosing pristine versus anthropogenically controlled atmopsheric chemistry

Mechanism of the hydroxy radical oxidation of methacryloyl peroxynitrate (MPAN) and its pathway toward secondary organic aerosol formation in the atmosphere

Formation of Low Volatility Organic Compounds and Secondary Organic Aerosol from Isoprene Hydroxyhydroperoxide Low-NO Oxidation

Isoprene NO3 Oxidation Products from the RO2 + HO2 Pathway

Atmospheric fates of Criegee intermediates in the ozonolysis of isoprene


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