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Numerical simulation of cirrus clouds: fire case study and sensitivity analysis

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dc.contributor.authorHeckman, Scot T., author
dc.date.accessioned2022-05-03T16:32:21Z
dc.date.available2022-05-03T16:32:21Z
dc.date.issued1991-08-12
dc.descriptionAugust 12, 1991.
dc.descriptionAlso issued as author's thesis (M.S.) -- Colorado State University, 1991.
dc.description.abstractThe October 28, 1986 FIRE (First ISCCP Regional Experiment) case was simulated using the Regional Atmospheric Modeling System - RAMS developed at Colorado State University. This three dimensional, mesoscale model was applied in non-hydrostatic and nested-grid mode using explicit, bulk microphysics and radiation. The simulation resulted in very good agreement between observed and model predicted dynamic and cloud fields. We verified cloud height, thickness, areal extent and microphysical composition against GOES satellite imagery, lidar, and aircraft measurements taken during the FIRE Cirrus IFO (Intensive Field Observation). We examined the simulated cirrus lifecycle to determine possible formation, maintenance and dissipation mechanisms. Sensitivity simulations were run to determine long and short wave radiative forcing. Also, a simulation was run with no condensate to examine cloud feedbacks on the environment. Cloud top generation zones, fallstreaks, and layering were simulated. Longwave radiation appeared to be instrumental in developing weak convective activity in the lower layer thereby increasing it's optical depth. Cloud top cooling and cloud base heating affected the flow around the cloud. Secondarily, we studied the effects of three upper boundary conditions on cirrus clouds in a synoptic setting.
dc.description.sponsorshipSponsored by the Air Force Office of Scientific Research AFOSR-88-0143.
dc.format.mediumreports
dc.identifier.urihttps://hdl.handle.net/10217/234916
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relationCatalog record number (MMS ID): 991023649069703361
dc.relationQC852 .C6 no. 483
dc.relation.ispartofAtmospheric Science Papers (Blue Books)
dc.relation.ispartofAtmospheric science paper, no. 483
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subject.lcshClouds -- Mathematical models
dc.subject.lcshConvection (Meteorology)
dc.subject.lcshMesometeorology
dc.titleNumerical simulation of cirrus clouds: fire case study and sensitivity analysis
dc.typeText
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