NASA Technical Reports Server (NTRS) : Lidar pdf

NASA Technical Reports Server (NTRS) : Lidar

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As part of MASEX and GALE a number of research flights were carried out over the Marine Boundary Layer (MBL) during periods when extremely cold and dry continental air was flowing out over the warm coastal waters at the east coast of the U.S. Such periods, which are named cold air outbreaks are characterized by massive warming and moistening of the MBL resulting in rapid entrainment conditions. As the MBL deepens as a function of fetch over the ocean, clouds develop. The line of cloud formation typically follows the coast line closely as has been observed many times from satellite imagery. The backscatter data from the NASA Goddard airborne lidar, which was used to measure the depth of the MBL in great detail, is ideally suited to verify parametrized models of boundary layer growth rate. The data indicates that the deepening MBL gradually develops clouds at its top.

Those clouds form an integral part of the MBL and exercise an important influence on the energy cycle within the MBL. It is suggested that the rapid entrainment observed during overcast conditions represent an increase in efficiency of conversion of available turbulence kinetic energy into entrainment energy

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 8/1/1986
• Year: 1986
• Book Topics/Themes: NASA Technical Reports Server (NTRS), ATMOSPHERIC BOUNDARY LAYER, ATMOSPHERIC TURBULENCE, COLD FRONTS, MARINE METEOROLOGY, OPTICAL RADAR, ATMOSPHERIC HEATING, CLOUD COVER, ENTRAINMENT, KINETIC ENERGY, RADAR TRACKING, YAG LASERS, Boers, R., Melfi, S. H

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