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Seasonal Variability in Local Carbon Dioxide Biomass Burning Sources Over Central and Eastern US Using Airborne In Situ Enhancement Ratios

Journal Article · · Journal of Geophysical Research. Atmospheres
DOI:https://doi.org/10.1029/2020JD034525· OSTI ID:2575678
 [1];  [2];  [1];  [3];  [1];  [4];  [5];  [6];  [7];  [8];  [9];  [10]
  1. NASA Langley Research Center, Hampton, VA (United States)
  2. NASA Langley Research Center, Hampton, VA (United States); Science Systems and Applications, Hampton, VA (United States)
  3. NASA Langley Research Center, Hampton, VA (United States); Universities Space Research Association, Columbia, MD (United States); US Environmental Protection Agency (EPA), Research Triangle Park, NC (United States)
  4. Pennsylvania State Univ., University Park, PA (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  5. Pennsylvania State Univ., University Park, PA (United States)
  6. Pennsylvania State Univ., University Park, PA (United States); Institut Pierre Simon Laplace, Gif‐sur‐Yvette (France). Laboratoire des Sciences du Climat et de l'Environnement
  7. Texas Tech Univ., Lubbock, TX (United States)
  8. The Pennsylvania State University University Park PA USA
  9. Univ. of Colorado, Boulder, CO (United States); National Oceanic and Atmospheric Administration (NOAA), Boulder, CO (United States)
  10. NOAA Global Monitoring Laboratory Boulder CO USA
+ Show Author Affiliations
We present observations of local enhancements in carbon dioxide (CO2) from local emissions sources over three eastern US regions during four deployments of the Atmospheric Carbon Transport-America (ACT-America) campaign between summer 2016 and spring 2018. Local CO2 emissions were characterized by carbon monoxide (CO) to CO2 enhancement ratios (i.e., ΔCO/ΔCO2) in air mass mixing observed during aircraft transects within the planetary boundary layer. By analyzing regional-scale variability of CO2 enhancements as a function of ΔCO/ΔCO2 enhancement ratios, observed relative contributions to CO2 emissions were separated into fossil fuel and biomass burning (BB) regimes across regions and seasons. CO2 emission contributions attributed to biomass burning (ΔCO/ΔCO2 > 4%) were negligible during summer and fall in all regions but climbed to ∼9%–11% of observed combustion contributions in the South during winter and spring. Relative CO2 fire emission trends matched observed winter and spring BB contributions, but conflictingly predicted similar levels of BB during the fall. Satellite fire data from MODIS and VIIRS suggested the use of higher spatial resolution fire data that might improve modeled BB emissions but were not able to explain the bulk of the discrepancy.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); USDOE
Grant/Contract Number:
AC05-76RL01830
Other Award/Contract Number:
NNX15AG76G
80NSSC19K0730
OSTI ID:
2575678
Report Number(s):
PNNL-SA--178881
Journal Information:
Journal of Geophysical Research. Atmospheres, Journal Name: Journal of Geophysical Research. Atmospheres Journal Issue: 24 Vol. 126; ISSN 2169-8996; ISSN 2169-897X
Publisher:
American Geophysical Union; WileyCopyright Statement
Country of Publication:
United States
Language:
English

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