Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published December 16, 2018 | Supplemental Material + Published
Journal Article Open

Biomass Burning Plumes in the Vicinity of the California Coast: Airborne Characterization of Physicochemical Properties, Heating Rates, and Spatiotemporal Features


This study characterizes in situ airborne properties associated with biomass burning (BB) plumes in the vicinity of the California coast. Out of 231 total aircraft soundings in July–August 2013 and 2016, 81 were impacted by BB layers. A number of vertical characteristics of BB layers are summarized in this work (altitude, location relative to cloud top height, thickness, number of vertically adjacent layers, interlayer distances) in addition to differences in vertical aerosol concentration profiles due to either surface type (e.g., land or ocean) or time of day. Significant BB layer stratification occurred, especially over ocean versus land, with the majority of layers in the free troposphere and within 100 m of the boundary layer top. Heating rate profiles demonstrated the combined effect of cloud and BB layers and their mutual interactions, with enhanced heating in BB layers with clouds present underneath. Aerosol size distribution data are summarized below and above the boundary layer, with a notable finding being enhanced concentrations of supermicrometer particles in BB conditions. A plume aging case study revealed the dominance of organics in the free troposphere, with secondary production of inorganic and organic species and coagulation as a function of distance from fire source up to 450 km. Rather than higher horizontal and vertical resolution, a new smoke injection height method was the source of improved agreement for the vertical distribution of BB aerosol in the Navy Aerosol Analysis and Prediction System model when compared to airborne data.

Additional Information

© 2018. American Geophysical Union. Received 7 JUN 2018. Accepted 26 OCT 2018. Accepted article online 31 OCT 2018. Published online 5 DEC 2018. All data used in this work can be found on the Figshare database (Sorooshian et al., 2017; https://figshare.com/articles/A_Multi‐Year_Data_Set_on_Aerosol‐Cloud‐Precipitation‐Meteorology_Interactions_for_Marine_Stratocumulus_Clouds/5099983). This work was funded by Office of Naval Research grants N00014‐10‐1‐0811, N00014‐11‐1‐0783, N00014‐10‐1‐0200, N00014‐04‐1‐0118, and N00014‐16‐1‐2567, and NASA grant NNX14AP75G.

Attached Files

Published - Mardi_et_al-2018-Journal_of_Geophysical_Research__Atmospheres.pdf

Supplemental Material - downloadSupplement_doi=10.1029_2F2018JD029134_file=jgrd55062-sup-0001-2018JD029134-ds01.zip

Supplemental Material - downloadSupplement_doi=10.1029_2F2018JD029134_file=jgrd55062-sup-0002-2018JD029134-SI.docx


Files (3.0 MB)

Additional details

August 22, 2023
October 20, 2023