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Title: Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-Based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site

Abstract

Our work is motivated by previous studies of the long-range trans-Atlantic transport of Saharan dust and the observed quasi-static nature of coarse mode aerosol with a volume median diameter (VMD) of approximately 3.5 µm. We examine coarse mode contributions from the trans-Pacific transport of Asian dust to North American aerosol microphysical and optical properties using a dataset collected at the high-elevation, mountain-top Storm Peak Laboratory (SPL, 3.22 km above sea level [ASL]) and the nearby Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF, 2.76 km ASL). Data collected during the SPL Cloud Property Validation Experiment (STORMVEX, March 2011) are complemented by quasi-global high-resolution model simulations coupled with aerosol chemistry. We identify dust event associated mostly with Asian plume (about 70% of dust mass) where the coarse mode with moderate (~4 µm) VMD is distinct and contributes substantially to aerosol microphysical (up to 70% for total volume) and optical (up to 45% for total scattering and aerosol optical depth) properties. Our results, when compared with previous Saharan dust studies, suggest a fairly invariant behavior of coarse mode dust aerosols. If confirmed in additional studies, this invariant behavior may simplify considerably model parameterizations for complex and size-dependent processes associated with dust transport andmore » removal.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [3];  [4];  [5];  [1]
  1. Pacific Northwest National Laboratory, Richland, Washington
  2. University of Nevada, Reno, Nevada
  3. Storm Peak Laboratory, Desert Research Institute, Steamboat Springs, Colorado
  4. University of Wisconsin–Madison, Madison, Wisconsin
  5. National Oceanic and Atmospheric Administration, Boulder, Colorado
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1353321
Report Number(s):
PNNL-SA-118075
Journal ID: ISSN 0022-4928; KP1701000; KP1703010; KP1703020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the Atmospheric Sciences; Journal Volume: 74; Journal Issue: 5
Country of Publication:
United States
Language:
English

Citation Formats

Kassianov, E., Pekour, M., Flynn, C., Berg, L. K., Beranek, J., Zelenyuk, A., Zhao, C., Leung, L. R., Ma, P. L., Riihimaki, L., Fast, J. D., Barnard, J., Hallar, A. G., McCubbin, I. B., Eloranta, E. W., McComiskey, A., and Rasch, P. J. Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-Based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site. United States: N. p., 2017. Web. doi:10.1175/JAS-D-16-0256.1.
Kassianov, E., Pekour, M., Flynn, C., Berg, L. K., Beranek, J., Zelenyuk, A., Zhao, C., Leung, L. R., Ma, P. L., Riihimaki, L., Fast, J. D., Barnard, J., Hallar, A. G., McCubbin, I. B., Eloranta, E. W., McComiskey, A., & Rasch, P. J. Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-Based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site. United States. doi:10.1175/JAS-D-16-0256.1.
Kassianov, E., Pekour, M., Flynn, C., Berg, L. K., Beranek, J., Zelenyuk, A., Zhao, C., Leung, L. R., Ma, P. L., Riihimaki, L., Fast, J. D., Barnard, J., Hallar, A. G., McCubbin, I. B., Eloranta, E. W., McComiskey, A., and Rasch, P. J. Mon . "Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-Based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site". United States. doi:10.1175/JAS-D-16-0256.1.
@article{osti_1353321,
title = {Large Contribution of Coarse Mode to Aerosol Microphysical and Optical Properties: Evidence from Ground-Based Observations of a Transpacific Dust Outbreak at a High-Elevation North American Site},
author = {Kassianov, E. and Pekour, M. and Flynn, C. and Berg, L. K. and Beranek, J. and Zelenyuk, A. and Zhao, C. and Leung, L. R. and Ma, P. L. and Riihimaki, L. and Fast, J. D. and Barnard, J. and Hallar, A. G. and McCubbin, I. B. and Eloranta, E. W. and McComiskey, A. and Rasch, P. J.},
abstractNote = {Our work is motivated by previous studies of the long-range trans-Atlantic transport of Saharan dust and the observed quasi-static nature of coarse mode aerosol with a volume median diameter (VMD) of approximately 3.5 µm. We examine coarse mode contributions from the trans-Pacific transport of Asian dust to North American aerosol microphysical and optical properties using a dataset collected at the high-elevation, mountain-top Storm Peak Laboratory (SPL, 3.22 km above sea level [ASL]) and the nearby Atmospheric Radiation Measurement (ARM) Mobile Facility (AMF, 2.76 km ASL). Data collected during the SPL Cloud Property Validation Experiment (STORMVEX, March 2011) are complemented by quasi-global high-resolution model simulations coupled with aerosol chemistry. We identify dust event associated mostly with Asian plume (about 70% of dust mass) where the coarse mode with moderate (~4 µm) VMD is distinct and contributes substantially to aerosol microphysical (up to 70% for total volume) and optical (up to 45% for total scattering and aerosol optical depth) properties. Our results, when compared with previous Saharan dust studies, suggest a fairly invariant behavior of coarse mode dust aerosols. If confirmed in additional studies, this invariant behavior may simplify considerably model parameterizations for complex and size-dependent processes associated with dust transport and removal.},
doi = {10.1175/JAS-D-16-0256.1},
journal = {Journal of the Atmospheric Sciences},
number = 5,
volume = 74,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}
}