HR: 13:55h
AN: A13G-02 INVITED [Abstracts]
TI: Three Dimensional Modeling Analysis of the Transpacific Transport of Aerosols During PACDEX
AU: * Carmichael, G R
EM: gcarmich@engineering.uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AU: Adhikary, B
EM: bhupesh-adhikary@uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AU: Hatch, C
EM: courtney-hatch@uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AU: Kulkarni, S
EM: sarika-kulkarni@uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AU: Moen, J
EM: jmoen@cgrer.uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AU: Mena, M
EM: marcelo-mena@uiowa.edu
AF: The Unviersity of Iowa, Center for Global & Regional Environmental Research, 424 IATL,
Iowa City, IA 52242, United States
AB:
Mineral dust and aerosols emitted from Asia are known to traverse long distances across the Pacific Ocean and
can reach North America within a few days. A pilot field study, the PACific Dust Experiment (PACDEX), was
carried out in April and May of 2007, during the peak East Asian dust emission season. The NSF/NCAR-HIAPER
(High Performance Instrumented Airborne Platform for Environmental Research) platform allowed for sampling
the evolution of mineral aerosol/pollution plumes and their physical and chemical characteristics as they traverse
the Pacific Ocean and interact with the Pacific cloud systems en route to North America in both the upper and
lower troposphere.
A comprehensive 3-dimensional regional-scale model developed at The University of Iowa (Sulfur Transport
dEposition Model, STEM) has been used for the analysis of aerosol interactions to help define key measurement
strategies during the mission and to help interpret observations from the HIAPER platform. In this study we will
present model aerosol distribution inter-comparison with cloud fields and aircraft observations. Model analysis
provides further insight into cloud/pollution/dust interactions as East Asian emissions transit the Pacific Ocean en
route to North America. Trajectory analysis and emission markers are used to help understand the air mass
history and aerosol aging processes of the aerosols sampled by the HIAPER platform. Estimates of the fluxes of
aerosol dust, BC and sulfate due to transpacific transport will also be presented.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting