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R/V Ronald H. Brown Daily Summaries

Daily Summary August 3, 2002, DOY = 215

Winds were from the SW overnight with the rising pressure. Concentrations of gases and particles were steady overnight rising and becoming more variable beginning at 1100. The study area was crowded with Saturday small boat traffic. The ship resumed the triangle sea-breeze course at 1200 with sondes launched every 3 hours. At 1300 the wind switched from the SW to the SE dropping to 2 m/s. By 1630 O3 had risen to 60 ppb and aerosol scattering (green) to 60 mM-1. These concentrations persisted throughout the remainder of the day. This was presumably the Boston plume blowing onto shore. Wind speed increased during the afternoon to 9 m/s making the triangle pattern difficult. The last triangle went outside the IOS. Brown terminated the triangle pattern at 2400 UTC and proceeded eastward to map the extent of the pollution plume. Today was labeled as the 'unequivocal sea breeze event'. The ship will return to the pattern tomorrow at 1000 UTC to see if the land breeze has reestablished.

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.