Grantee Research Project Results
2019 Progress Report: Interplay Between Black and Brown Carbon from Biomass Burning and Climate
EPA Grant Number: R835883Title: Interplay Between Black and Brown Carbon from Biomass Burning and Climate
Investigators: Murphy, Shane Michael
Institution: University of Wyoming
EPA Project Officer: Chung, Serena
Project Period: January 1, 2016 through December 31, 2018 (Extended to September 30, 2020)
Project Period Covered by this Report: January 1, 2019 through December 31,2019
Project Amount: $349,847
RFA: Particulate Matter and Related Pollutants in a Changing World (2014) RFA Text | Recipients Lists
Research Category: Air , Climate Change , Early Career Awards
Objective:
The objectives of this project are to determine the wavelength-resolved single scattering albedo (SSA), absorption, and extinction along with the chemical and physical properties of aerosol emissions from biomass burning (wildfires) in the Western United States. These data enable us to determine the contribution of black versus brown carbon to observed aerosol absorption and quantify the enhancement of black carbon absorption caused by organic coatings. We utilize these new in-situ observations to update the refractive indices of organic and black carbon aerosol from biomass burning in the NCAR Community Atmosphere Model (CAM5) and assess the regional and global climate impacts of improved optical properties under a range of future biomass burning scenarios.
Progress Summary:
The major accomplishments during this reporting period are:
1.) Participation and successful data collection during the Moonlight Chamber Experiments at the National Center for Atmospheric Research. Data have been uploaded to a central server available to all participants in the chamber experiments.
2.) Final publication of Foster et al. (2019) describing a new particle-based calibration technique for photoacoustic absorption spectrometers
3.) Completion of a final draft of a manuscript comparing laboratory to ambient observations of biomass burning optical properties to be submitted by June, 2020.
4.) Completion of a final draft of a manuscript describing near universal underestimation of single scattering albedo in global climate models compared to global observations.
5.) Near completion of a final draft of a manuscript demonstrating the ability to quantify absorption from specific compounds observed in the chamber experiments in field data.
Future Activities:
The unpublished manuscripts described in the Outputs/Outcomes will be completed and published and analysis of the 2018 deployment data will continue. Principal investigator Shane Murphy will prepare to participate in the final project meeting for the grant either in person or remotely during a seminar series.
Journal Articles on this Report : 2 Displayed | Download in RIS Format
| Other project views: | All 6 publications | 2 publications in selected types | All 2 journal articles |
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Brown H, Liu X, Feng Y, Jiang Y, Wu M, Lu Z, Wu C, Murphy S, Pokhrel R. Radiative effect and climate impacts of brown carbon with the community atmosphere model (CAM5). Atmospheric Chemistry and Physics 2018;18:17745-17768. |
R835883 (2018) R835883 (2019) R835883 (Final) |
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Foster K, Pokhrel RP, Burkhart MD, Murphy SM. A novel approach to calibrating a photo-acoustic absorption spectrometer using polydisperse absorbing aerosol. Atmospheric Measurement Techniques 2019;12(6): 3351-3363. |
R835883 (2018) R835883 (2019) R835883 (Final) |
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Supplemental Keywords:
Air, Tropospheric, Atmosphere, Climate ModelsRelevant Websites:
N/A
Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.