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The PACific Dust Experiment (PACDEX) field campaign is taking place from April to May, 2007.
Center for Global & Regional Environmental Research at the University of Iowa is providing daily chemical weather forecasts in support of this experiment.

University of Iowa's STEM-2k3 regional chemical transport model are performed in 50km domain.
The Weather Research & Forecasting model (WRF) provides meteorological fields to drive these calculations.

Interactive Forecast Viewers (need enabling pop-up windows)

Trans-Pacific 50km Tracer
Pacdex Vis5D files

If you want to study current or previous scenarios instead of flight planning, previous forecasts may be more helpful.

Additional forecast products can be found at the links below:
Atmospheric Brown Cloud 
PACDEX Project Page
RIAM-CFORS Forecast Products
Pacdex Special Files
Chinese Cites Air Quality Index

Please contact Dr. Gregory Carmichael, Bhupesh Adhikary, or Marcelo Mena for further analyzed products. 

Phone numbers