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Title: Seasonality of Formic Acid (HCOOH) in London during the ClearfLo Campaign

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1002/2017JD027064· OSTI ID:1410365
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [2];  [3]; ORCiD logo [4];  [3];  [5];  [6]; ORCiD logo [6]; ORCiD logo [2];  [7]
  1. Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science University of Manchester Manchester UK
  2. Biogeochemistry Research Centre, School of Chemistry University of Bristol Bristol UK
  3. National Centre for Atmospheric Science University of York York UK, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry University of York York UK
  4. Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry University of York York UK
  5. National Centre for Atmospheric Science, Department of Chemistry University of Leicester Leicester UK
  6. Combustion Research Facility Sandia National Laboratories Livermore CA USA
  7. Centre for Atmospheric Science, School of Earth, Atmospheric and Environmental Science University of Manchester Manchester UK, Now at Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA

Abstract Following measurements in the winter of 2012, formic acid (HCOOH) and nitric acid (HNO 3 ) were measured using a chemical ionization mass spectrometer (CIMS) during the Summer Clean Air for London (ClearfLo) campaign in London, 2012. Consequently, the seasonal dependence of formic acid sources could be better understood. A mean formic acid concentration of 1.3 ppb and a maximum of 12.7 ppb was measured which is significantly greater than that measured during the winter campaign (0.63 ppb and 6.7 ppb, respectively). Daily calibrations of formic acid during the summer campaign gave sensitivities of 1.2 ion counts s −1  parts per trillion (ppt) by volume −1 and a limit of detection of 34 ppt. During the summer campaign, there was no correlation between formic acid and anthropogenic emissions such as NO x and CO or peaks associated with the rush hour as was identified in the winter. Rather, peaks in formic acid were observed that correlated with solar irradiance. Analysis using a photochemical trajectory model has been conducted to determine the source of this formic acid. The contribution of formic acid formation through ozonolysis of alkenes is important but the secondary production from biogenic VOCs could be the most dominant source of formic acid at this measurement site during the summer.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1410365
Alternate ID(s):
OSTI ID: 1410366; OSTI ID: 1414437
Report Number(s):
SAND-2017-13269J
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Vol. 122 Journal Issue: 22; ISSN 2169-897X
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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