Abstract
During the New England Air Quality Study (NEAQS-2002) a large number of trace gas species were measured aboard the NOAA ship Ronald H. Brown along the east coast of the U.S. Emissions from numerous sources were measured in the New York harbor area during a brief stop on the transit north. Urban emissions from the Boston area and from the New Hampshire/Maine coastal region, as well as emissions from biogenic sources, were frequently observed during the intensive study period in the southern Gulf of Maine. Moreover, numerous well-defined narrow plumes were sampled throughout the experiment, attributable to either marine vessel exhaust or point-source emissions from land-based sites at or near the coast. Measurements of SO2, NOy and CO2 mixing ratios in these plumes, along with back-trajectory analysis, were used to identify a number of these point-sources through comparison to emission inventory data available from the U.S. EPA. In this talk the types and characteristics of emissions source plumes encountered during the study will be presented. Part of the discussion will focus on the transport and transformation of these plumes within the marine boundary layer.
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