Details:

Journal Title:
Journal of Geophysical Research: Atmospheres
Personal Author:
Shingler, Taylor ; Crosbie, Ewan ; Ortega, Amber ; Shiraiwa, Manabu ; Zuend, Andreas ; ... More +
Shingler, Taylor ; Crosbie, Ewan ; Ortega, Amber ; Shiraiwa, Manabu ; Zuend, Andreas ; Beyersdorf, Andreas ; Ziemba, Luke ; Anderson, Bruce ; Thornhill, Lee ; Perring, Anne E. ; Schwarz, Joshua P. ; Campazano‐Jost, Pedro ; Day, Douglas A. ; Jimenez, Jose L. ; Hair, Johnathan W. ; Mikoviny, Tomas ; Wisthaler, Armin ; Sorooshian, Armin Less -
NOAA Program & Office:
OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)
OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:
In situ aerosol particle measurements were conducted during 21 NASA DC-8 flights in the Studies of Emissions and Atmospheric Composition, Clouds, and Climate Coupling by Regional Surveys field campaign over the United States, Canada, Pacific Ocean, and Gulf of Mexico. For the first time, this study reports rapid, size-resolved hygroscopic growth and real refractive index (RI at 532 nm) data between the surface and upper troposphere in a variety of air masses including wildfires, agricultural fires, biogenic, marine, and urban outflow. The Differential Aerosol Sizing and Hygroscopicity Spectrometer Probe (DASH-SP) quantified size-resolved diameter growth factors (GF = D-p,D-wet/D-p,D-dry) that are used to infer the hygroscopicity parameter kappa. Thermokinetic simulations were conducted to estimate the impact of partial particle volatilization within the DASH-SP across a range of sampling conditions. Analyses of GF and RI data as a function of air mass origin, dry size, and altitude are reported, in addition to kappa values for the inorganic and organic fractions of aerosol. Average RI values are found to be fairly constant (1.52-1.54) for all air mass categories. An algorithm is used to compare size-resolved DASH-SP GF with bulk scattering f(RH=80%) data obtained from a pair of nephelometers, and the results show that the two can only be reconciled if GF is assumed to decrease with increasing dry size above 400 nm (i.e., beyond the upper bound of DASH-SP measurements). Individual case studies illustrate variations of hygroscopicity as a function of dry size, environmental conditions, altitude, and composition.
Source:
Journal of Geophysical Research-Atmospheres, 121(8), 4188-4210.
DOI:
https://doi.org/10.1002/2015jd024498
Document Type:
Journal Article
Rights Information:
Other
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Submitted
Main Document Checksum:
[+]
urn:sha256:dd256fa7054d1bf6327d842c146b205f471fcc07d5bd33fa2c49e559aac51bdf
Download URL:
https://repository.library.noaa.gov/view/noaa/21851/noaa_21851_DS1.pdf
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