Hydrogen peroxide and methylhydroperoxide observations by chemical ionization mass spectrometry on the GV during the Deep Convective Clouds and Chemistry Experiment
Abstract
Airborne gas phase measurements of hydrogen peroxide and methylhydroperoxide were made on 22 research flights on the NCAR Gulfstream-V using chemical ionization mass spectroscopy (CIMS) during the Deep Convective Clouds and Chemistry Experiment (DC3) in May and June 2012. A multi-reagent ion CIMS method, using O2- and CO4- reagent ions, and standard additions of hydrogen peroxide and methylhydroperoxide was developed to identify and quantify hydrogen peroxide (H2O2) and methylhydroperoxide (CH3OOH) in ambient air. The DC3 field program characterized a number of active convective systems in three different regions, Colorado, Oklahoma, and Alabama with observations extending from the surface to 13 km. A few flights were also flown to characterize the photochemical aging of lofted chemicals and lightning generated oxides of nitrogen. Peroxide observations will be used to examine transport efficiency and removal in isolated convective storms and larger scale multiple convective systems. Differences in peroxide storm input and transport process will be compared across the three regions. Peroxide observations coupled with other in situ chemical species observations and meteorological parameters will be used to assess the contribution of convective transport to the photochemical budget of hydrogen peroxide and methylhydroperoxide in the upper troposphere over the United States.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFM.A41B0035O
- Keywords:
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- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0394 ATMOSPHERIC COMPOSITION AND STRUCTURE Instruments and techniques;
- 0320 ATMOSPHERIC COMPOSITION AND STRUCTURE Cloud physics and chemistry