Across North America Tracer Experiment (ANATEX) Volume III: Sampling at Tower and Remote Sites

 

Jerome L. Heffter and Roland R. Draxler

 

NOAA Technical Memorandum ERL ARL-175, October 1989

Abstract - The Across North America Tracer Experiment (ANATEX) was designed to provide a comprehensive data-base for assessing the performance of long-range transport and diffusion models. Three distinct perfluorocarbon tracers (PMCH, oPDCH, and PTCH) were released simultaneously for a 3-h duration every 2  days from 2 sites; PTCH from Glasgow, Montana, and oPDCH and PMCH (every fifth day) from St. Cloud, Minnesota for the 84 day period January 5, 1987 through March 29, 1987.  Daily (24-h) average ground-level tracer measurements were taken at 77 "primary" sampling sites located about 500 to 3000 km from Glasgow. In addition, 6-h measurements were taken at the base and top of 5 tall towers (~200m) and 24-h measurements were taken at the tower tops along the ANATEX 1600 km arc to investigate the vertical tracer distributions with respect to nearby ground-level sample collections.  The ANATEX sampling program also included weekly average measurements at 12 "remote" sites in the western Atlantic, the west coast of Europe, and the west coast of North America to investigate very long-range plume and hemispheric tracer background. This report describes the experimental design of the sampling programs at the tower and remote sites, discusses the measured data and how they were analyzed and quality assured, summarized data characteristics, discusses data use, and presents complete data tables for both tower and remote sites.  The report also describes the characteristics, format, and accessibility of data sets created from the data analysis.

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