Accession Number : ADA192944

Title :   Cloud Simulation Warm Cloud Experiments: Droplet Growth and Aerosol Scavenging.

Descriptive Note : Final technical rept.,

Corporate Author : MISSOURI UNIV-ROLLA GRADUATE CENTER FOR CLOUD PHYSICS RESEARCH

Personal Author(s) : White, D R ; Hagen, D E ; Carstens, J C

PDF Url : ADA192944

Report Date : 02 Mar 1988

Pagination or Media Count : 142

Abstract : During the research period starting January 1, 1985 and ending December 31, 1987 the following research objectives were achieved: (1) the Proto II facility is operating according to original specifications, including its capability of reaching temperatures sufficiently low (approximately -36 C) to homogeneously nucleate ice from supercooled water drops; (2) the warm cloud experiments, designed to measure the condensation coefficient of water, have been completed as well as the analysis. It has been found that the condensation coefficient tends to decrease from a value near unity to a significantly low value, approximately .01, as the drop grows from submicron size range to several microns, radius; (3) the problem of chamber humidification, the resolution of which became a major research objective during the course of these investigations, has been solved and we are now able to determine initial relative humidities to required accuracy; (4) the larger Romulus chamber is now producing cloud. The scavenging experiment has not been completed, although considerable progress has been made in its design and implementation. We should be producing results on scavenging by summer 1988.

Descriptors :   *AEROSOLS, *NUCLEATION, *CLOUD PHYSICS, *ADHESION, ACCURACY, CLOUDS, COEFFICIENTS, CONDENSATION, DROPS, GROWTH(GENERAL), HUMIDIFIERS, HUMIDITY, ICE, SIZES(DIMENSIONS), SUPERCOOLING, WATER, CLOUD CHAMBERS

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE