RELATIONSHIPS BETWEEN TROPICAL PRECIPITATION AND KINEMATIC CLOUD MODELS
Quarterly progress rept. no. 3, 1 Nov 1962 31 Jan 1963
TRAVELERS RESEARCH CENTER INC HARTFORD CT
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A set of equations describing kinematical relationships among cloud, precipitation, and the wind field are derived in detail. Steady-state profiles of cloud in a non-precipitating tropical atmosphere are presented for 10 C steps of the condensation level the unresponsiveness of cloud content to vertical air displacements at high altitudes and low temperatures is an explanation for the relative presistence of cirrus clouds. Exact solutions are presented for a cloud and precipitation model that is simplified to include only the problem of pre cipitation initiation. This model shows that where two processes for precipitation formation exist, the onset of precipitation is controlled only within certain limits by alteration of one of the processes. Microphysical parameters influence transient features of the development of precipitation and cloud. In many case, how ever, the steady-state surface precipitatite is only slightly responsive to order-of magnitude changes of the microphysical parameters.