The NASA Global Tropospheric Experiment (GTE) was initiated in the early 1980's and consist of an on going series of global airborne measurement campaigns to study the impact humans are having on the global troposphere.

The Chemical Instrumentation Test and Evaluation [CITE-1, -2 and -3] experiments were initiated to evaluate our ability to measure critical tropospheric species; the field studies known as Atmospheric Boundary Layer Experiment [ABLE -1, -2A and -2B, and -3A and -3B] were conducted to study major ecosystems that are known to exert a major influence on global chemistry and, in some cases, are undergoing profound changes; and the impact of long range transport of continental emissions, natural and anthropogenic, have been studied through the field campaigns Transport and Chemistry near the Equator in the Atlantic [TRACE-A], the Pacific Exploratory Missions in the Pacific [PEM West-A and -B, PEM-Tropics A and B], and the recent TRAnsport and Chemical Evolution over the Pacific [TRACE-P].

A major focus of the GTE campaigns during the past decade has been the characterization of the growing emissions from the Asian continent. The Pacific Exploratory Missions in the north western Pacific [PEM-West A (September/October (1991)) and PEM-West B February/March (1994)] and the TRAnsport and Chemistry Experiment in the Pacific [TRACE-P March/April 2001)], in particular, were conducted to study the impact of natural and anthropogenic emission from the Asian continent on the chemistry of the troposphere over the north western Pacific region. PEM-West (A) was conducted during a period of minimum out-flow from the Asian continent, while PEM-West (B) was conducted during a period of maximum outflow from the Asian continent. The more recent TRACE-P campaign was a much more focused study of the Asian outflow involving the NASA DC-8 and P-3B aircraft instrumented for measurements of a more extensive suite of trace gases and aerosols.

The data archive for all of the GTE campaigns typically contain measurements of ozone, carbon monoxide, nitrogen oxides, non-methane hydrocarbons, aerosol size and chemical composition, and ancillary meteorological parameters. Measurements from the more recent PEM-Tropics A and B and TRACE-P also contain measurements of the hydroxyl radical along with a more extensive suite of hydrocarbon and halocarbon measurements.

Examples of the data in each archive will be presented and CD-ROMS of selected data sets will be available. An Immersa Desk will also be available for 3D visualization of data from the TRACE-P and PEM-West A and B data sets.