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Record 5 of 4577
Preliminary Analysis and Simulations of July 23rd Extended Anvil Case
Author and Affiliation:
Lin, R.-F.(Maryland Univ. Baltimore County, Catonsville, MD, United States)
Demoz, B.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
McGill, M.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Heymsfield, G.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Sassen, K.(Alaska Univ., AK, United States)
Bui, P.(NASA Ames Research Center, Moffett Field, CA, United States)
Heymsfield, A.(National Center for Atmospheric Research, Boulder, CO, United States)
Halverson, J.(Maryland Univ. Baltimore County, Catonsville, MD, United States)
Rickenbach, T.(Maryland Univ. Baltimore County, Catonsville, MD, United States)
Poellot, M.(North Dakota Univ., Grand Forks, ND, United States) Show more authors
Abstract: A key focus of CRYSTAL-FACE (Cirrus Regional Study of Tropical Anvils and cirrus Layers - Florida Area Cirrus Experiment) was the generation and subsequent evolution of cirrus outflow from deep convective cloud systems. A preliminary integrated look at the observations of an extended cirrus anvil cloud system observed on 23 July 2002 will be presented, including lidar and millimeter radar observations from NASA's ER-2 and in- situ observations from NASA's WB-57 and University of North Dakota Citation. The observations will be compared to preliminary results of simulations using 1-D and 2-D high-resolution (100 meter) cloud resolving models. The CRMs explicitly account for cirrus microphysical development by resolving the evolving ice crystal size distribution (bin model) in time and space. Both homogeneous and heterogeneous nucleation are allowed in the model. The CRM simulations are driven using the output of regional simulations using MM5 that produces deep convection similar to what was observed. The MM5 model employs a 2 km inner grid (32 layers) over a 360 km domain, nested within a 6 km grid over a 600 km domain. Initial and boundary conditions for the 36- hour MM5 simulation are taken from NCEP Eta model analysis at 32 km resolution. Key issues to be explored are the settling of the observed anvil versus the model simulations, and comparisons of dynamical properties, such as vertical motions, occurring in the observations and models. The former provides an integrated measure of the validity of the model microphysics (fallspeed) while the latter is the key factor in forcing continued ice generation.
Publication Date: Jan 01, 2003
Document ID:
20030032366
(Acquired May 05, 2003)
Subject Category: METEOROLOGY AND CLIMATOLOGY
Document Type: Preprint
Meeting Information: CRYSTAL Science Team; 24-28 Feb. 2003; Salt Lake City, UT; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: CIRRUS CLOUDS; SIMULATION; TROPICAL REGIONS; ANVIL CLOUDS; HETEROGENEITY; NUCLEATION; CLOUDS (METEOROLOGY); HIGH RESOLUTION; OPTICAL RADAR; U-2 AIRCRAFT; RADAR TRACKING; ICE; BOUNDARY CONDITIONS
Availability Source: Other Sources
Availability Notes: Abstract Only
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