While aircraft provide great spatial coverage, long-term unattended monitoring
at remote sites can provide great temporal coverage. We have developed
reliable instruments and effective satellite communications for surface-based
sites. The prototype was tested in Shenandoah National Park (Virginia), where
we have collected data for several years. Back trajectories computed in
collaboration with NOAA's Air Resources Laboratory show that the heavily
industrialized Ohio River Valley as a major source of pollution to rural
Virginia. This work has been renewed in 1995 in cooperation with the North
American Research Strategy for Tropospheric Ozone (NARSTO). The news, at least
in part, is good; the long-term trend in CO is downward.
Carbon Monoxide in the U.S. Mid-Atlantic Troposphere: Evidence for a
Decreasing Trend, Hallock-Waters, K. A., B. G. Doddridge, R. R. Dickerson, S.
Spitzer, and J. D. Ray, Geophys. Res. Lett., in press 1999.
