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SEAC4RS Trajectory Plots

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For each DC-8 and ER-2 flight, five-day back trajectories were released along the flight path using HYSPLIT. To do this, each flight was broken into "flight legs." Each flight leg is a 10-minute segment of the flight. Within that 10-minute segment, we create points every 30 seconds (DC-8) or 60 seconds (ER-2), giving us 20 (10) points along that leg. Then, back trajecctories are released from these points at the temporal midpoint of the flight leg. For example, let us assume there was a flight leg from 12:00 - 12:10 UTC. We would gather points every 30 seconds along that leg, and release back trajectories from these points at the temporal midpoint, 12:05 UTC. Whenever possible, the trajectories used the 4 km WRF data. However, if a trajectory exited the 4 km domain, it would then use the 12 km data, and if it exited the 12 km domain, it used the 36 km data.

In addition to the flight level trajectories, we also computed back trajectories for each flight leg from 4 constant pressure altitudes: 850, 500, 300, and 100 hPa. These trajectories are meant to help diagnose where the air above/below the aircraft came from.

First, Select a Date:

Second, Select a Platform:

Third, Select a Flight Leg:

Fourth, Select a Release Level:


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The Florida State University
Dept. of Meteorology/404 LOV
1017 Academic Way / P.O. Box 3064520
Tallahassee, FL 32306-4520

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