To investigate the chemical and dynamic evolution of tropospheric chemical composition over mid- to high-latitude continental North America during the winter/spring transition, with particular emphasis on the springtime ozone maximum in the troposphere.

from the TOPSE Science and Implementation Plan

January 1st, 2001 TOPSE Highlights and Preliminary Results
September 22nd, 1999 TOPSE bibliography (Word doc)
January 4th, 1999 NSF Facility Request
November 6th, 1998 Preliminary TOPSE Science and Implementation Plan (Word doc)
July 21st, 1998 TOPSE Background Document