Direct Measurements of Dry and Wet Deposition of Black Carbon Over a Grassland
Journal Article
·
· Journal of Geophysical Research: Atmospheres
- Colorado State Univ., Fort Collins, CO (United States); DOE/OSTI
- National Oceanic and Atmospheric Administration, Boulder, CO (United States)
- Handix Scientific Inc., Boulder, CO (United States)
- Colorado State Univ., Fort Collins, CO (United States)
The atmospheric lifetime of black carbon (BC) is controlled by wet and dry deposition, which are poorly constrained by observations. We show that the single-particle soot photometer can measure surface-atmosphere exchange fluxes of refractory BC (rBC) particle mass (mrBC) and number (NrBC) by eddy covariance. We report field measurements of rBC dry and wet deposition rates during summer 2017 at the Southern Great Plains site in Oklahoma. On average, dry deposition of rBC is 0.3 ± 0.2 mm/s. We estimate a wet deposition flux of 2,600 ng·m-2·hr-1 over the 148.5 mm of rainfall observed. These data indicate a composite lifetime of 7–11 days.
- Research Organization:
- Colorado State Univ., Fort Collins, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
- Grant/Contract Number:
- SC0016259
- OSTI ID:
- 1612449
- Journal Information:
- Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: 21 Vol. 123; ISSN 2169-897X
- Publisher:
- American Geophysical UnionCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Recent Advances in Quantifying Wet Scavenging Efficiency of Black Carbon Aerosol
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journal | April 2019 |
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