HIPPO-3

The "Collaborative Research: HIAPER Pole-to-Pole Observations (HIPPO) of Carbon Cycle and Greenhouse Gases Study" measured cross sections of atmospheric concentrations approximately pole-to-pole, from the surface to the tropopause, five times during different seasons over a three year period. A comprehensive suite of atmospheric trace gases pertinent to understanding the Carbon Cycle were measured. HIPPO missions transected the mid-Pacific ocean and returned either over the Eastern Pacific, or over the Western Atlantic. The program provided the first comprehensive, global survey of atmospheric trace gases, covering the full troposphere in all seasons and multiple years.