Long-Term Measurements of SO2 and NO2 Concentrations and Related MeteorologicalConditions in the Northeastern Gulf of Mexico

摘要

Air quality and meteorological data collected from remote near-coastal stationsat Breton Island, Louisiana and Dauphin Island. Alabama during the period of October 1994 through April 1997 are analyzed and presented in this report. In addition, meteorological data from NOAA stations at Grand Isle (GDIL1), Dauphin Island (DPIA1), and offshore at buoys 42007 and 42040 are included in the discussion. Highest concentrations of SO2 and NO2 occurring at Dauphin Island during the measurement period were predominantly seen with northerly winds. Highest SO2 concentrations at Breton Island were also associated with northerly winds, while high NO2 was more distributed but most frequently related to southerly winds. Estimated mean annual concentrations of SO2 and NO2 at both monitoring stations was less than 5 ppb.