Details:

Journal Title:
Atmospheric Chemistry and Physics
Personal Author:
Veres, P. R. ; Roberts, J. M. ; Wild, R. J. ; Edwards, P. M. ; Brown, S. S. ; ... More +
Veres, P. R. ; Roberts, J. M. ; Wild, R. J. ; Edwards, P. M. ; Brown, S. S. ; Bates, T. S. ; Quinn, P. K. ; Johnson, J. E. ; Zamora, R. J. ; de Gouw, J. Less -
NOAA Program & Office:
OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; PMEL (Pacific Marine Environmental Laboratory)
OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; PSL (Physical Sciences Laboratory) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:
In this paper laboratory work is documented establishing iodide ion chemical ionization mass spectrometry (I- CIMS) as a sensitive method for the unambiguous detection of peroxynitric acid (HO2NO2; PNA). A dynamic calibration source for HO2NO2, HO2, and HONO was developed and calibrated using a novel total NOy cavity ring-down spectroscopy (CaRDS) detector. Photochemical sources of these species were used for the calibration and validation of the I- CIMS instrument for detection of HO2NO2. Ambient observations of HO2NO2 using I- CIMS during the 2013 and 2014 Uintah Basin Wintertime Ozone Study (UBWOS) are presented. Strong inversions leading to a build-up of many primary and secondary pollutants as well as low temperatures drove daytime HO2NO2 as high as 1.5 ppbv during the 2013 study. A comparison of HO2NO2 observations to mixing ratios predicted using a chemical box model describing an ozone formation event observed during the 2013 wintertime shows agreement in the daily maxima HO2NO2 mixing ratio, but a differences of several hours in the timing of the observed maxima. Observations of vertical gradients suggest that the ground snow surface potentially serves as both a net sink and source of HO2NO2 depending on the time of day. Sensitivity tests using a chemical box model indicate that the lifetime of HO2NO2 with respect to deposition has a non-negligible impact on ozone production rates on the order of 10 %.
Source:
Atmospheric Chemistry and Physics, 15(14), 8101-8114.
DOI:
http://dx.doi.org/10.5194/acp-15-8101-2015
Document Type:
Journal Article
Rights Information:
CC BY
Compliance:
Submitted
Main Document Checksum:
[+]
urn:sha256:2206c4813df49d1daf16ada4c57796aa41eac0cd0ebb2b59d8fd7e3aea63f2fd
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