Boat Transect Measurements over the Chesapeake Bay during the OWLETS-2 Campaign
Abstract
The Ozone Water-Land Environmental Transition Study 2 (OWLETS-2) field campaign during the summer of 2018 was designed to characterize spatial and vertical distribution of pollutants in the upper west bank of the Chesapeake Bay, in the Baltimore, MD, region. During the intensive periods (June, 2018), two heatwaves had been observed, accompanied with high ozone concentration episodes reported by the Maryland Department of Environment (MDE). During these warm periods, four cruises were performed to monitor the in situ conditions at the surface of the Chesapeake Bay (see figure 1). The boat was instrumented with a suit of instruments to measure trace gases (O3, SO2, CO, NOx), meteorological data (pressure, temperature,, humidity, and wind), radiation data (solar radiances, irradiance, and water skin temperature), and aerosols (spectrometer, and aerosol backscatter profile). Early results show that the highest ozone levels (74 ppb) were detected on the second day of the second heatwave, on 6/30, with moderate SO2 and CO concentration levels (0.49ppb and 0.45 ppb, respectively). After 2 days, on 7/2, ozone concentrations did not exceed 70 ppb, with similar concentration levels of SO2 and CO (0.51 and 0.35 ppm respectively), and air temperature 2 to 3 0C higher. On the other hand, aerosol total concentration increased from 6/29 to 7/2, from 59.7 to 159 #/cm3, respectively.
Figure1: Boat trajectory (yellow line) over the Chesapeake Bay during OWLETS 2 campaign on 7/2/2018.- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.A54D..02S
- Keywords:
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- 0365 Troposphere: composition and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0368 Troposphere: constituent transport and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 3307 Boundary layer processes;
- ATMOSPHERIC PROCESSESDE: 3355 Regional modeling;
- ATMOSPHERIC PROCESSES