A22G:
The Underappreciated Aerosol Coarse Mode: Dust Sources and Coarse Mode Impacts on Climate and Biogeochemistry II

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Session ID#: 34790

Session Description:
The coarse mode tends to be ignored because it is difficult to measure, and the perception that it does not exert a large effect on aerosol forcing or chemistry. However, coarse mode aerosols can have substantial impact on ice nuclei concentrations, on radiative forcing, and when deposited change the biogeochemistry and impact on the carbon cycle. There is a need to assimilate the current state of knowledge about coarse mode aerosol and its influence on climate and biogeochemistry. Factors that must be considered include: (1) variability in dust generation, (2) size-resolved physical, optical and chemical characteristics, and (3) atmospheric processing. This session encourages the presentation of work that addresses these factors in measurements and models. Individual observational studies at specific locations, cross-scales studies, and global modeling synthesis studies are encouraged. Also, this session will focus discussion about our evolving knowledge of the linkages between drought, "natural" and anthropogenic dust emissivity.
Primary Convener:  Evgueni Kassianov, Pacific Northwest National Laboratory, Richland, WA, United States
Conveners:  Kasey Bolles, Baylor University, Department of Geosciences, Waco, TX, United States, Natalie M Mahowald, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States and Steven L Forman, Baylor University, Waco, TX, United States
Chairs:  Allison C McComiskey, NOAA Boulder, Boulder, CO, United States and Christine Wiedinmyer, CIRES, University of Colorado, Boulder, CO, United States
OSPA Liaison:  Natalie M Mahowald, Cornell University, Earth and Atmospheric Sciences, Ithaca, NY, United States

Cross-Listed:
  • B - Biogeosciences
  • EP - Earth and Planetary Surface Processes
  • GC - Global Environmental Change
Index Terms:

0305 Aerosols and particles [ATMOSPHERIC COMPOSITION AND STRUCTURE]
0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
1622 Earth system modeling [GLOBAL CHANGE]
3322 Land/atmosphere interactions [ATMOSPHERIC PROCESSES]

Abstracts Submitted to this Session:

Characterization of Desert Dust from Ground-Based and Satellite Remote Sensing Observations (Invited) (234327)
Oleg Dubovik1, Tatyana Lapyonok2, Pavel Lytvynov3, Anton Lopatin3, Benjamin Torres4, David Fuertes3, Xin Huang5, Fabrice Ducos6 and Yevgeny Derimian7, (1)University of Lille, Laboratoire d'Optique Atmosphérique, Villeneuve d'Ascq, France, (2)Univ. Lille, CNRS, UMR 8518 - LOA - Laboratoire d’Optique Atmosphérique, Lille, France, (3)GRASP SAS, Remote Sensing Developments, Lille, France, (4)GRASP - SAS, Villeneuve d'Ascq, France, (5)University of Lille 1, Laboratoire d'Optique Atmosphérique, Villeneuve d'Ascq, France, (6)Laboratoire d'Optique Atmosphérique, CNRS/University of Lille, Lille, France, (7)CNRS, Paris Cedex 16, France
Transpacific Transport of Dust to North American High-Elevation Sites: Integrated Dataset and Model Outputs (245812)
Evgueni Kassianov1, Mikhail S Pekour1, Connor J. Flynn2, Larry K Berg3, Josef Beranek1, Alla Zelenyuk1, Chun Zhao4, L. Ruby Leung3, Po-Lun Ma1, Laura Riihimaki5, Jerome D Fast1, Jim Barnard6, Gannet Gannet Hallar7, Ian McCubbin7, Edwin W Eloranta8, Allison C McComiskey9 and Philip J Rasch10, (1)Pacific Northwest National Laboratory, Richland, WA, United States, (2)PNNL, Richland, United States, (3)PNNL / Climate Physics, Richland, WA, United States, (4)University of Science and Technology of China, Hefei, China, (5)Pacific Northwest National Lab, Richland, United States, (6)University of Nevada Reno, Atmospheric Sciences Program, Department of Physics, Reno, NV, United States, (7)DRI / Storm Peak Laboratory, Steamboat Springs, CO, United States, (8)Space Science and Engineering Center, University of Wisconsin-Madison, Madison, United States, (9)NOAA Boulder, Boulder, CO, United States, (10)University of Washington, Seattle, United States
CHARACTERIZATION OF OPTICAL PROPERTIES OF DESERT DUST AND OTHER AEROSOLS USING POSTIVE MATRIX FACTORIZATION (272528)
Heikki Lihavainen1, Mansour Alghamdi2, Antti Hyvärinen1, Tareq Hussein3, Kimmo Neitola1, M. Khoder2, A. S. Abdelmaksoud2, H. Al-Jeelani2, I. I. Shabbaj2 and F. M. Almehmadi2, (1)Finnish Meteorological Institute, Helsinki, Finland, (2)King Abdulaziz University, Jeddah, Saudi Arabia, (3)University of Helsinki, Helsinki, Finland
How Do Particle Shape and Internal Composition Affect Optical Properties of Atmospheric Dust: Studies of Individual Particles Based on Focused Ion-Beam Tomography (232655)
Joseph M Conny, National Institute of Standards and Technology, Gaithersburg, MD, United States and Diana Luz Ortiz-Montalvo, National Institute of Standards and Technology Gaithersburg, Gaithersburg, MD, United States
Spectral Remote Sensing of Dust Sources on the U.S. Great Plains from 1930s Panchromatic Aerial Phtography (286613)
Kasey Bolles and Steven L Forman, Baylor University, Department of Geosciences, Waco, TX, United States
Quantitation and speciation of total soluble phosphorous and associated nutrient inputs from precipitation and dust deposited along a latitudinal transect in Newfoundland and Labrador (297513)
Trevor C VandenBoer1, Courtney M Laprise2, Bryan Place3, Kate A. Edwards4, Cora Young1 and Susan E Ziegler5, (1)York University, Chemistry, Toronto, ON, Canada, (2)Memorial University, Earth Sciences, St. John's, NF, Canada, (3)University of California Berkeley, Berkeley, United States, (4)Natural Resources Canada, Canadian Forest Service, Ottawa, ON, Canada, (5)Memorial University of Newfoundland, Earth Science, St John's, NL, Canada

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