1. Trajectory Description Kinematic trajectories are calculated from 1° x 1° NCEP GFS model data during the INTEX-B period 10 day backward and forward trajectories are calculated once every 60 seconds of flight time Initiation points are based upon latitude, longitude, pressure level (altitude), and time of day –Trajectories were calculated for all flights during INTEX-B, along the flight track –Trajectories were also initiated at the standard pressure levels of 850, 700, 500 and 300 hPa for the same latitude, longitude and time of day as the flight. Backward trajectories quantify where the air sampled during a flight originated, both in time and space. They can identify regions of convection as well as stagnant regions due to a system of high pressure. Forward trajectories quantify where the air sampled during a flight is going to travel. The use of these was very beneficial during the flight-planning for identifying emissions from individual locations in southeast Asia. –During MILAGRO, forward trajectories showed that much of the Mexico City outflow was to the northeast during the month of March. This air directly influenced pollution levels over much of the southeast United States. Website Description Trajectory plots can be viewed at the following web-address: http://fuelberg.met.fsu.edu/research/intexb/traj/traj.html –Password protected for a total of one year after the completion of INTEX-B Username: intexb Password: pacific –Navigating the site, you will find backward and forward trajectory plots for all DC-8 and C-130 flights during INTEX-B. –There are also stationary forward trajectory plots initiated at 850, 700 and 500 hPa twice daily for the month of March over Mexico City. Additional meteorological and trajectory data can be found at the Fuelberg-lab’s Main INTEX-B website: http://fuelberg.met.fsu.edu/research/intexb/ –There is a link to this page at the top-right of the trajectory plots page as well. –This page contains trajectory intersection data for all flights during the MILAGRO portion of INTEX-B –Coming soon, all of the trajectory intersection data from the INTEX-B Meteorological Overview presentation by Henry Fuelberg will also be posted. –An archive of satellite and model data, as well as weather briefings in the field are also located at this website. –Links to posters given at this meeting as well as the first MILAGRO meeting are located here. Contact Information –Jeremy Halland, email: jhalland@met.fsu.edu Trajectory Plots INTEX-B Trajectory Products Available on the FSU Website Jeremy Halland, Henry Fuelberg and Billy Veczko Department of Meteorology, Florida State University, Tallahassee FLorida Flight track plot available for each flight. –Flight direction arrows, and color coded flight level pressure (left) –Vertical profile of flight track with respect to time with each leg labeled on the plot (center) –Backward trajectories from each flight leg displayed in a planview (right-top) and vertical with respect to longitude (right-bottom)