Abstract

The Global Atmospheric Research Program (GARP) was described in some detail in the last U.S. National Report (Perry, 1975). The latest GARP activities are discussed in another contribution to this report. In this section, we will describe the major research activities that followed the GARP Atlantic Tropical Experiment (GATE) of 1974.From the beginning of GARP, the tropics were identified for special attention. The tropical zones, of course, are the primary source of heat driving the general circulation of the atmosphere. The phenomena that transmit the necessary energy to the middle latitudes are not adequately treated in the large‐scale models of the general circulation. To a large extent this inadequacy is due to significant gaps in our understanding of the physical processes involved in deep cumulus convection and the interactions between convection and the other dominant scales of atmospheric phenomena. GATE was designed to obtain data that permit research on the effects of smaller scale tropical systems on the larger scale circulations. The ultimate objective of GATE is to improve and verify tropical numerical models.

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