The GAIM Task Force is a collection of scientists each conducting independent research which is coordinated and integrated through the GAIM office. The GAIM modelling effort is structured by Topic and Time Period. The Topics are CO2, Trace Gas, and Climate-Vegetation Interactions. The Time periods are Paleo (<20 kyrs), fossil fuel (<200 yrs), contemporary (<20 yrs), and future. in addition to modelling projects, gaim is involved in collaborative activites with various igbp core projects. these activites include thematic workshops and various cross-disciplinary and support activities.