Diagnostic case study of the 9-11 August period during the GARP Atlantic Tropical Experiment, A
Several analysis techniques are used to determine the structure of a disturbance which traversed the GATE A/B ship array from 9 to 11 August 1974. Emphasis is placed on the identification of an easterly wave and the tropospheric structure associated with it. The disturbance is also viewed as a pre-tropical cyclone cloud cluster. The vorticity, divergence and vertical motions fields are compared to fields derived from western Pacific cloud clusters. The disturbance proves to be associated with an easterly wave which is best defined at 600 mb and is cold core in the mid-troposphere. The convection ...