Intercomparison of biomass burning aerosol optical properties from in situ and remote-sensing instruments in ORACLES-2016
Abstract
The total effect of aerosols, both directly and on cloud properties, remains the biggest source of uncertainty in anthropogenic radiative forcing on the climate. Correct characterization of intensive aerosol optical properties, particularly in conditions where absorbing aerosol is present, is a crucial factor in quantifying these effects. The southeast Atlantic Ocean (SEA), with seasonal biomass burning smoke plumes overlying and mixing with a persistent stratocumulus cloud deck, offers an excellent natural laboratory to make the observations necessary to understand the complexities of aerosol–cloud–radiation interactions. The first field deployment of the NASA ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) campaign was conducted in September of 2016 out of Walvis Bay, Namibia. Data collected during ORACLES-2016 are used to derive aerosol properties from an unprecedented number of simultaneous measurement techniques over this region. Here, we present results from six of the eight independent instruments or instrument combinations, all applied to measure or retrieve aerosol absorption and single-scattering albedo. Most but not all of the biomass burning aerosol was located in the free troposphere, in relative humidities typically ranging up to 60%. We present the single-scattering albedo (SSA), absorbing and total aerosol optical depth (AAOD and AOD), and absorption, scattering, andmore »
- Authors:
-
more »
- Bay Area Environmental Research Inst., Moffett Field, CA (United States); NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
- Univ. of Oklahoma, Norman, OK (United States)
- Univ. of Washington, Seattle, WA (United States)
- Univ. of Miami, FL (United States)
- NASA Langley Research Center, Hampton, VA (United States)
- NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- Univ. of Colorado, Boulder, CO (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Univ. of Hawaii, Honolulu, HI (United States)
- NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States); Univ. Space Research Association, Mountain View, CA (United States)
- Columbia Univ., New York, NY (United States); NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
- California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Jet Propulsion Lab.
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1571274
- Report Number(s):
- PNNL-SA-147352
Journal ID: ISSN 1680-7324
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Atmospheric Chemistry and Physics (Online)
- Additional Journal Information:
- Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 19; Journal Issue: 14; Journal ID: ISSN 1680-7324
- Publisher:
- European Geosciences Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Pistone, Kristina, Redemann, Jens, Doherty, Sarah, Zuidema, Paquita, Burton, Sharon, Cairns, Brian, Cochrane, Sabrina, Ferrare, Richard, Flynn, Connor, Freitag, Steffen, Howell, Steven G., Kacenelenbogen, Meloë, LeBlanc, Samuel, Liu, Xu, Schmidt, K. Sebastian, Sedlacek III, Arthur J., Segal-Rozenhaimer, Michal, Shinozuka, Yohei, Stamnes, Snorre, van Diedenhoven, Bastiaan, Van Harten, Gerard, and Xu, Feng. Intercomparison of biomass burning aerosol optical properties from in situ and remote-sensing instruments in ORACLES-2016. United States: N. p., 2019.
Web. doi:10.5194/acp-19-9181-2019.
Pistone, Kristina, Redemann, Jens, Doherty, Sarah, Zuidema, Paquita, Burton, Sharon, Cairns, Brian, Cochrane, Sabrina, Ferrare, Richard, Flynn, Connor, Freitag, Steffen, Howell, Steven G., Kacenelenbogen, Meloë, LeBlanc, Samuel, Liu, Xu, Schmidt, K. Sebastian, Sedlacek III, Arthur J., Segal-Rozenhaimer, Michal, Shinozuka, Yohei, Stamnes, Snorre, van Diedenhoven, Bastiaan, Van Harten, Gerard, & Xu, Feng. Intercomparison of biomass burning aerosol optical properties from in situ and remote-sensing instruments in ORACLES-2016. United States. doi:https://doi.org/10.5194/acp-19-9181-2019
Pistone, Kristina, Redemann, Jens, Doherty, Sarah, Zuidema, Paquita, Burton, Sharon, Cairns, Brian, Cochrane, Sabrina, Ferrare, Richard, Flynn, Connor, Freitag, Steffen, Howell, Steven G., Kacenelenbogen, Meloë, LeBlanc, Samuel, Liu, Xu, Schmidt, K. Sebastian, Sedlacek III, Arthur J., Segal-Rozenhaimer, Michal, Shinozuka, Yohei, Stamnes, Snorre, van Diedenhoven, Bastiaan, Van Harten, Gerard, and Xu, Feng. Thu .
"Intercomparison of biomass burning aerosol optical properties from in situ and remote-sensing instruments in ORACLES-2016". United States. doi:https://doi.org/10.5194/acp-19-9181-2019. https://www.osti.gov/servlets/purl/1571274.
@article{osti_1571274,
title = {Intercomparison of biomass burning aerosol optical properties from in situ and remote-sensing instruments in ORACLES-2016},
author = {Pistone, Kristina and Redemann, Jens and Doherty, Sarah and Zuidema, Paquita and Burton, Sharon and Cairns, Brian and Cochrane, Sabrina and Ferrare, Richard and Flynn, Connor and Freitag, Steffen and Howell, Steven G. and Kacenelenbogen, Meloë and LeBlanc, Samuel and Liu, Xu and Schmidt, K. Sebastian and Sedlacek III, Arthur J. and Segal-Rozenhaimer, Michal and Shinozuka, Yohei and Stamnes, Snorre and van Diedenhoven, Bastiaan and Van Harten, Gerard and Xu, Feng},
abstractNote = {The total effect of aerosols, both directly and on cloud properties, remains the biggest source of uncertainty in anthropogenic radiative forcing on the climate. Correct characterization of intensive aerosol optical properties, particularly in conditions where absorbing aerosol is present, is a crucial factor in quantifying these effects. The southeast Atlantic Ocean (SEA), with seasonal biomass burning smoke plumes overlying and mixing with a persistent stratocumulus cloud deck, offers an excellent natural laboratory to make the observations necessary to understand the complexities of aerosol–cloud–radiation interactions. The first field deployment of the NASA ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) campaign was conducted in September of 2016 out of Walvis Bay, Namibia. Data collected during ORACLES-2016 are used to derive aerosol properties from an unprecedented number of simultaneous measurement techniques over this region. Here, we present results from six of the eight independent instruments or instrument combinations, all applied to measure or retrieve aerosol absorption and single-scattering albedo. Most but not all of the biomass burning aerosol was located in the free troposphere, in relative humidities typically ranging up to 60%. We present the single-scattering albedo (SSA), absorbing and total aerosol optical depth (AAOD and AOD), and absorption, scattering, and extinction Ångström exponents (AAE, SAE, and EAE, respectively) for specific case studies looking at near-coincident and near-colocated measurements from multiple instruments, and SSAs for the broader campaign average over the month-long deployment. For the case studies, we find that SSA agrees within the measurement uncertainties between multiple instruments, though, over all cases, there is no strong correlation between values reported by one instrument and another. We also find that agreement between the instruments is more robust at higher aerosol loading (AOD400 > 0.4).The campaign-wide average and range shows differences in the values measured by each instrument. We find the ORACLES-2016 campaign-average SSA at 500 > nm (SSA500) to be between 0.85 and 0.88, depending on the instrument considered (4STAR, AirMSPI, or in situ measurements), with the interquartile ranges for all instruments between 0.83 and 0.89. This is consistent with previous September values reported over the region (between 0.84 and 0.90 for SSA at 550nm). The results suggest that the differences observed in the campaign-average values may be dominated by instrument-specific spatial sampling differences and the natural physical variability in aerosol conditions over the SEA, rather than fundamental methodological differences.},
doi = {10.5194/acp-19-9181-2019},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 14,
volume = 19,
place = {United States},
year = {2019},
month = {7}
}
Web of Science
Figures / Tables:

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Above-cloud aerosol radiative effects based on ORACLES 2016 and ORACLES 2017 aircraft experiments
journal, January 2019
- Cochrane, Sabrina P.; Schmidt, K. Sebastian; Chen, Hong
- Atmospheric Measurement Techniques, Vol. 12, Issue 12
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