| Multispectral Remote Sensing and COAMPS Model Analysis Methods for Marine Cloud Structure, Entrainment Processes and Refractivity Effects |
21 DEC 2004 |
19 pages |
| Authors:
Melanie A. Wetzel; Steven K. Chai; Darko R. Koracin; NEVADA UNIV RENO DESERT RESEARCH INST
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 | The primary goal of this research is advancement in the utilization of satellite remote sensing methods with mesoscale simulation models for improved prediction of marine stratus and boundary layer structure. Related goals include the study of marine stratus evolution and analysis of microwave refractivity at the interface of the cloudy marine layer and the free troposphere. High accuracy for short-term prediction of cloud and inversion structure in marine environments is ... |
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| Geochemical and Physical Characteristics of Iraqi Dust and Soil Samples |
08 OCT 2004 |
63 pages |
| Authors:
Eric V. McDonald; Todd Caldwell; NEVADA UNIV RENO DESERT RESEARCH INST
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| This study quantified physical and chemical characteristics of dust derived from soils sampled in Iraq. Recognizing that weapons jamming could be related to physical and chemical properties of dust, the Desert Research Institute (DR!) was commissioned by the Army Research Office to undertake an analysis of a limited number of Iraqi dust samples collected during the period 27 March - 8 April 2004 by an onsite geologist of the U.S. ... |
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| Analysis and Assessment of Military and Non-Military Impacts on Biodiversity: A Framework for Environmental Management on DoD Lands Using the Mojave Desert as a Regional Case Study |
31 MAY 2002 |
7 pages |
| Authors:
David Mouat; NEVADA UNIV RENO DESERT RESEARCH INST
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| This study designed and modeled alternative futures (patterns of land use as they might exist in the year 2020) to assess the projected status of biodiversity in the California Mojave Desert. The objective was to assist DoD in proactive ecosystem management of the Mojave Desert by providing projections on changing patterns of land use that might occur by 2020, and to assess the impact of future scenarios on the viability ... |
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| Modeling the Dispersion of Vapor and Aerosol Particulates in the Atmospheric Boundary Layer |
17 MAY 2001 |
48 pages |
| Authors:
Steven K. Chai; Darko Koracin; Leif Enger; NEVADA UNIV RENO DESERT RESEARCH INST
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| The goal of this project is to improve our scientific understanding of dispersion issues over complex terrain and publish results in scientific journals. Three scientific articles and one student's Master thesis are under preparation based on the results supported by this project. The first paper, entitled "The role of advection of fluxes on modeling dispersion in convective boundary layers", is aimed at examining the importance of the advection terms for ... |
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| Forecast Model Applications of Satellite-derived Cloud Parameters |
01 DEC 2000 |
34 pages |
| Authors:
Melanie Wetzel; Steven Chai; NEVADA UNIV RENO DESERT RESEARCH INST
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| Development of satellite remote sensing retrieval methods, numerical model studies and field observational research have been conducted to advance the use of cloud physical parameters with the Navy's Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) prediction model. Procedures have been demonstrated for the satellite retrieval techniques and the merging of these retrieved parameters with COAMPS model output. Prediction of boundary layer cloudiness is a critical ... |
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| Modeling the Dispersion of Vapor and Aerosol Particulates in the Atmospheric Boundary Layer |
28 AUG 2000 |
18 pages |
| Authors:
Steven Chai; Darko Koracin; NEVADA UNIV RENO DESERT RESEARCH INST
|
| The turbulent flow in the atmosphere is so complex and ranges over such a large range of scales that even if we were able to describe its detailed structure it would be practically impossible to simulate it. The study of turbulent flow is therefore focused on describing the statistical characteristics of the turbulence. One makes the assumption that the turbulent flow can be separated ... |
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| Quality Assurance Plan for Data Collection: Characterizing and Quantifying Local and Regional Particulate Matter Emissions from Department of Defense Installations |
24 AUG 2000 |
25 pages |
| Authors:
J. A. Gillies; W. P. Arnott; V. Etymezian; H. Kuhns; E. V. McDonald; NEVADA UNIV RENO DESERT RESEARCH INST
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| A systematic, empirically based research approach that combines environmental monitoring and field experimentation was previously proposed to quantify and characterize emissions from testing and training at the National Training Center, Ft. Irwin. The purpose of the research is to assist the Department of Defense in assessing contributions from training activities in a variety of environmental conditions to local and regional PM levels and off-post regional visibility effects. This document has ... |
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| Investigation of Properties of High Level Cirrus Clouds and their Importance for Satellite and Aircraft Operations |
29 DEC 1999 |
10 pages |
| Authors:
John Hallett; NEVADA UNIV RENO DESERT RESEARCH INST
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| New instrumentation has been designed developed and deployed for characterizing ice and water droplets in clouds in the atmosphere by in situ aircraft measurement. The principle of operation depends on capture of the particles on a forward facing probe and their processing through evaporation and/or melting to give particle mass and density. Data is both video recorded and also obtained as permanent record as a ... |
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| Modeling the Dispersion of Vapor and Aerosol Particulates in the Atmospheric Boundary Layer |
01 SEP 1999 |
19 pages |
| Authors:
Steven K. Chai; Darko Koracin; Lelf Enger; NEVADA UNIV RENO DESERT RESEARCH INST
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| When dealing with dispersion modeling in topographically complex surroundings there are several aspects to be considered. Does the topography give rise to preferred flow patterns, sea and land breeze cycles, mountain and valley winds, canalizations, etc.? When developing operational models there is also the question of available computer capacity. The selection of measurement locations in complex terrain, frequency of sampling, and selection of synoptic situations always place limits on the ... |
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| Forecast Model Applications of Satellite-Derived Cloud Parameters |
30 APR 1999 |
14 pages |
| Authors:
Melanie Wetzel; Steven Chai; NEVADA UNIV RENO DESERT RESEARCH INST
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| Microphysical characteristics in maritime cloud have significant control on cloud layer evolution, electromagnetic propagation, cloud aerosol interactions, visibility, and aircraft flight hazards. While the Coupled Ocean/ Atmosphere Mesoscale Prediction System (COAMPS) model may not in the immediate future explicitly represent cloud microphysical parameters, the relationship of cloud structure to the predicted variables must be assessed, particularly when considering physical or radiative parameterizations. Electromagnetic signal propagation through the atmosphere is directly ... |
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| Algorithm for the Retrieval of Fire Pixels from DMSP Operational Linescan System Data |
29 JUN 1995 |
41 pages |
| Authors:
Christopher D. Elvidge; Herbert W. Kroehl; Eric A. Kihn; Kimberly E. Baugh; Ethan R. Davis; NEVADA UNIV RENO DESERT RESEARCH INST
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| In reviewing the literature, the earliest report we were able to find describing the observation of fire using a satellite sensor acquiring daily- global earth observations occurred when Croft (1973) described observing fires at night in Africa using "photographs" generated from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS) visible band data. Croft (1978) was later able to use digital OLS data to observe fires, ... |
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| Cloud Condensation Nuclei Measurements in Shiptrails |
13 APR 95 |
3 pages |
| Authors:
James G. Hudson; NEVADA UNIV RENO DESERT RESEARCH INST
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| At the end of May the CCN spectrometer and calibration equipment were transported to Monterey for the field project The equipment operated successfully for most of the time on 11 of the 12 research flights. For most of the time the CCN spectrometer directly monitored the ambient CCN spectrum. Occasionally, the sample aerosol was heated to obtain particle volatility. Sometimes the aerosol was size classified to obtain the relative solubility ... |
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| CCN Spectra Measurements as an Active Tracer of Stratocumulus Mechanisms |
OCT 92 |
3 pages |
| Authors:
James G. Hudson; NEVADA UNIV RENO DESERT RESEARCH INST
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| Studies of Cubic Ice Crystals |
DEC 91 |
29 pages |
| Authors:
William G. Finnegan; Richard L. Pitter; NEVADA UNIV RENO DESERT RESEARCH INST
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| In this final year of the program, investigators focused on questions of ice crystal morphological behavior under various conditions, such as when they fall or rise into a temperature regime which is inconsistent with their existing habit. The literature is unclear on this question; most published results indicate that if the conditions change, the ice crystal will change its growth characteristics |
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| Studies of Cubic Ice Crystals |
11 DEC 89 |
76 pages |
| Authors:
William G. Finnegan; Richard L. Pitter; NEVADA UNIV RENO DESERT RESEARCH INST
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| This three-year study, conducted for the Innovative Science and Technology Program of the Strategic Defense Initiative Organization through the Office of Naval Research, has produced a number of interesting findings of consequences to the atmospheric sciences. More important, the discovery of one phenomenon--that ionic salts which are present undergo differential ion inclusion into the ice phase of growing ice crystals--results in the explanation of many ice crystal initiation, growth, and ... |
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| Soil-Vegetation Correlations in Riparian and Emergent Wetlands, Lyon County, Nevada |
JUL 88 |
50 pages |
| Authors:
Janet L. Nachlinger; NEVADA UNIV RENO DESERT RESEARCH INST
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| As part of a national study, vegetation associated with known hydric and nonhydric soil series was sampled in Lyon County, Nevada. Weighted averages and presence/absence averages were calculated for vegetation in each soil series using the method developed by T.R. Wentworth and G.P. Johnson at North Carolina State University. The wetland indicator status for each plant species was determined using the Wetland Plant List developed by the U.S. Fish and ... |
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| Effects of CCN-FCN (Cloud Condensation Nuclei-Fog Condensation Nuclei) Spectra on Droplet Spectra in the Albany Fog Project |
05 MAR 87 |
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| Authors:
James G. Hudson; NEVADA UNIV RENO DESERT RESEARCH INST
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 | Analysis of aerosol and fog droplet data has shown that fogs are composed of zones with various supersaturations and subsaturation. A technique to quantify the subsaturations as well as the supersaturations has been developed. This has enable calculations to be made of droplet growth and evaporation of the droplet spectra. These preliminary approximations are consistent with the measured time evolutions of the fog. The largest nuclei (lowest critical supersaturation) FCN ... |
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| Studies of the Ocean Surface and the Coupling between the Sea and the Atmosphere |
01 OCT 1984 |
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| Authors:
J. W. Telford; NEVADA UNIV RENO DESERT RESEARCH INST
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| Studies of the electric field above fog and the construction of a unique electric field mill are described. Work on the formation of fog includes the studies of the surface roughness, von Karman's constant, stratus formation in the convecting marine boundary layer and studies of how convection is initiated and continues in the marine boundary layer when the water is initially colder than the air. These results show why fog ... |
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| The Effect of the Aerosol on Fog Microstructure. |
1981 |
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| Authors:
J. G. Hudson; NEVADA UNIV RENO DESERT RESEARCH INST
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| The propagation of radiation through a cloud depends on the concentration and size distribution of drops. A series of aerosol measurements in various types of fogs and hazes shows a direct relationship between a subset of the dry aerosol and fog drops. These measurements allow identification of the specific aerosol component (fog condensation nuclei, FCN) upon which fog droplets condense. The extensive variability of these particle concentrations can be seen ... |
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| An Experimental Determination of the Drag on Liquid Drops. |
31 JUL 1980 |
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| Authors:
Thomas E. Hoffer; Phillip H. Gillaspy; NEVADA UNIV RENO DESERT RESEARCH INST
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| One of the primary considerations in all types of spraying operations in where the dispensed material will impact on the ground. This impact area is determined by the trajectory of the liquid drop which can be predicted if the drag is known. Each drop, depending upon its size and physical properties, will have a slightly differing drag and consequently, trajectory. Thus, a reliable calculation of an impact area can only ... |
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