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Title: Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake: Aerosol Scattering Hygroscopic Growth

Abstract

Long-term measurements of changes in the aerosol scattering coefficient hygroscopic growth at the U.S. Department of Energy Southern Great Plains site provide information on the seasonal as well as size and chemical dependence of aerosol hygroscopic growth. Annual average sub 10 um fRH values (the ratio of aerosol scattering at 85%/40% RH) were 1.75 and 1.87 for the gamma and kappa fit algorithms, respectively. The study found higher growth rates in the winter and spring seasons that correlated with high aerosol nitrate mass fraction. FRH, exhibited strong, but differing correlations with the scattering Ångström exponent and backscatter fraction, two optical size-dependent parameters. The aerosol organic fraction had a strong influence, with fRH decreasing with increases in the organic mass fraction and absorption Ångström exponent and increasing with the aerosol single scatter albedo. Uncertainty analysis if the fit algorithms revealed high uncertainty at low scattering coefficients and slight increases in uncertainty at high RH and fit parameters values.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [3];  [4]
  1. Cooperative Institute of Research in the Environmental Sciences, University of Colorado Boulder, Boulder Colorado USA; Earth Systems Research Laboratory, National Oceanic and Atmospheric Administration, Boulder Colorado USA
  2. Earth Systems Research Laboratory, National Oceanic and Atmospheric Administration, Boulder Colorado USA; Science and Technology Corporation, Boulder Colorado USA
  3. Pacific Northwest National Laboratory, Richland Washington USA
  4. Brookhaven National Laboratory, Upton New York USA
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1406705
Report Number(s):
PNNL-SA-124902
Journal ID: ISSN 2169-897X; KP1704010
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Geophysical Research: Atmospheres; Journal Volume: 122; Journal Issue: 17
Country of Publication:
United States
Language:
English

Citation Formats

Jefferson, A., Hageman, D., Morrow, H., Mei, F., and Watson, T.. Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake: Aerosol Scattering Hygroscopic Growth. United States: N. p., 2017. Web. doi:10.1002/2017JD026804.
Jefferson, A., Hageman, D., Morrow, H., Mei, F., & Watson, T.. Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake: Aerosol Scattering Hygroscopic Growth. United States. doi:10.1002/2017JD026804.
Jefferson, A., Hageman, D., Morrow, H., Mei, F., and Watson, T.. Mon . "Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake: Aerosol Scattering Hygroscopic Growth". United States. doi:10.1002/2017JD026804.
@article{osti_1406705,
title = {Seven years of aerosol scattering hygroscopic growth measurements from SGP: Factors influencing water uptake: Aerosol Scattering Hygroscopic Growth},
author = {Jefferson, A. and Hageman, D. and Morrow, H. and Mei, F. and Watson, T.},
abstractNote = {Long-term measurements of changes in the aerosol scattering coefficient hygroscopic growth at the U.S. Department of Energy Southern Great Plains site provide information on the seasonal as well as size and chemical dependence of aerosol hygroscopic growth. Annual average sub 10 um fRH values (the ratio of aerosol scattering at 85%/40% RH) were 1.75 and 1.87 for the gamma and kappa fit algorithms, respectively. The study found higher growth rates in the winter and spring seasons that correlated with high aerosol nitrate mass fraction. FRH, exhibited strong, but differing correlations with the scattering Ångström exponent and backscatter fraction, two optical size-dependent parameters. The aerosol organic fraction had a strong influence, with fRH decreasing with increases in the organic mass fraction and absorption Ångström exponent and increasing with the aerosol single scatter albedo. Uncertainty analysis if the fit algorithms revealed high uncertainty at low scattering coefficients and slight increases in uncertainty at high RH and fit parameters values.},
doi = {10.1002/2017JD026804},
journal = {Journal of Geophysical Research: Atmospheres},
number = 17,
volume = 122,
place = {United States},
year = {Mon Sep 11 00:00:00 EDT 2017},
month = {Mon Sep 11 00:00:00 EDT 2017}
}