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R/V Ronald H. Brown Daily Summaries

Daily Summary August 6, 2002, DOY = 218

The cold front passed the ship at 0245 UTC with a dramatic wind shift to NE and then NW. Barometric pressure and O3 began to rise. Aerosol light scattering and SO2 concentrations decreased. By 0900 UTC light scattering by aerosols (green) was one tenth that of yesterday. In the NW flow the ship was downwind of Portsmouth during the night. Plumes of SO2 were observed. The plume of a large tanker leaving Portland was sampled by Brown at 1200 UTC. At 1330 the wind came abaft the beam for operations at Star Island. Two passengers were embarked at 1500 and the ship departed the IOS for Nantucket. The wind during this transit was behind the ship (mast blower was reversed).

For all plots, time is indicated in GMT. Eastern time is -5 hours.

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Location
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Temperature, Pressure
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Sea Surface Temperature, Relative Humidity
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True Wind Speed, Direction
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Ship Speed, Direction
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Relative Wind Speed, Direction

Textual information and data plots are for quicklook and overview purposes only.