| Anomalous Conditions in the Middle Atmosphere During Boreal Winters of 2004 and 2006 |
31 DEC 2007 |
34 pages |
| Authors:
Peter P. Wintersteiner; ARCON CORP WALTHAM MA
|
 | An examination of SABER data for boreal winter reveals extraordinary conditions in the mesosphere early in 2004 and 2006. In portions of the polar region, during much but not all of the mid-January through mid-March period for which data are available in each of those years, the OH layer is unusually low and bright. The temperature structure in also greatly perturbed, from the stratosphere to the upper mesosphere. Specifically, the ... |
|
| Hot H2O Emission and Evidence for Turbulence in the Disk of a Young Star |
01 MAR 2004 |
9 pages |
| Authors:
John S. Carr; Alan T. Tokunaga; Joan Narta; NAVAL RESEARCH LAB WASHINGTON DC
|
| We report on the detection and analysis of hot rovibrational H2O emission from SVS 13, a young stellar object previously known to have strong CO overtone band head emission. Modeling of the high-resolution infrared spectrum shows that the H2O emission is characterized by temperatures of 1500 K, significantly lower than the temperatures that characterize the CO band head emission. The widths of the H2O lines are also found to be ... |
|
| Tidal and Layer Structure in the Mesosphere and Lower Thermosphere From TIMED-SABER CO2 15-Micrometers Emission |
2004 |
12 pages |
| Authors:
R. H. Picard; P. P. Wintersteiner; J. R. Winick; C. J. Mertens; M. G. Mlynczak; J. M. Russell III.; L. L. Gordley; W. E. Ward; C. Y. She; AIR FORCE RESEARCH LAB HANSCOM AFB MA
|
| The SABER radiometer on the TIMED spacecraft scans the earthlimb continuously in ten channels spanning the spectrum from 1.27 to 15 mum. The signature of the diurnal tide in the equatorial region is apparent throughout the mesosphere in TIMED/SABER data, especially in the CO2 15-mum radiance profiles. In addition, layer structures are apparent in a large fraction of the both the radiance profiles and the kinetic temperature profiles derived from ... |
|
| Observed Microphysical and Radiative Structure of Mid-Level, Mixed-Phase Clouds |
MAY 2001 |
190 pages |
| Authors:
Robert P. Fleishauer; AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH
|
| Airborne measurements of six mid-level clouds observed over the Great Plains of the United States in late 1999 and early 2000 are analyzed extensively. All cloud fields are associated with a 500-mb low-pressure center or a potential vorticity maximum, with additional lift provided by upper-level jet streams. Data show that these innocuous looking clouds display complicated microphysical and thermodynamic structures. Five of six cases include mixed- phase conditions in temperatures ... |
|
| Applications of New Concepts in Scientific Analysis to Atmospheric Studies |
13 DEC 2000 |
3 pages |
| Authors:
James G. Brasseur; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF MECHANICAL ENGINEERING
|
| The diffusion of passive scalar pollutants in the atmosphere can constitute serious environment hazards. Recent studies have pointed to the increased danger associated with extremely high instantaneous point concentrations. We analyzed the local turbulence structure underlying statistical descriptions of turbulent diffusion. Specifically, we analyzed the entrainment of passive scalar across a buoyancy-driven convective boundary layer (CBL) capping inversion using 963 and 1283 large-eddy simulation (LES). In the simulations, a uniform ... |
|
| A One-Dimensional Atmospheric Boundary Layer Model: Comparison with Observations |
SEP 2000 |
31 pages |
| Authors:
Arnold Tunick; ARMY RESEARCH LAB ADELPHI MD
|
| This report examines details of a one-dimensional (1D) atmospheric boundary layer model to establish the proper functioning of its soil, plant, and atmospheric physics. To achieve this goal, I inspect, repair, and modify a computer program that scientists at the Hebrew University, Department of Soil and Water Sciences, gave to me years ago. The computer program was exercised to determine if the model results are stable ... |
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| Analysis of ALOHA-93 Campaign Data in Terms of Gravity and Tidal Wave Modes: Considerations on the Jet Stream as a Gravity-Wave Source |
29 DEC 1999 |
9 pages |
| Authors:
T. F. Tuan; CINCINNATI UNIV OH DEPT OF PHYSICS
|
| We report on two particular phenomena observed in the ALOHA-93 Campaign. On 20 Oct 1993, the data showed a sudden sharp rise in temperature over an exceedingly narrow height range, with an initially modest temperature peak at 93 km rising to a peak value two hours later at a height of 88 km, then subsiding to a much smaller value near 87 km some 4-1/2 hours later. The second phenomenon ... |
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| Coupled Ocean-Atmosphere Interaction and the Development of the Marine Atmospheric Boundary Layer |
07 OCT 97 |
9 pages |
| Authors:
David P. Rogers; SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA
|
| The goal of this research was to provide an understanding of the processes that control the structure of the marine atmosphere and its interaction with the ocean. In particular, we focussed on understanding the processes that control the exchange of heat and moisture between the ocean and the atmosphere and understanding the physical processes that control the formation, development and decay of stratocumulus clouds in the marine boundary layer. These ... |
|
| Hot Electron Effect and Quantum Magnetotransport in Quantum Wires |
19 JUN 1997 |
123 pages |
| Authors:
Supriyo Bandyopadhyay; NOTRE DAME UNIV IN
|
| This report details the result of theoretical investigation carried out to study hot electron effects and magneto-optical properties of quantum wires. Many surprising features emerged, such as the quenching of acoustic phonon interaction by a magnetic field, an anomalous electron cooling effect, a temperature inversion effect, the possibility of a negative transport lifetime, giant enhancements in the second and third order optical nonlinearities in a quantum wire, and the possibility ... |
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| An Evaluation of Selected Virtual Temperature Data Acquired at the APRF in 1994 |
MAY 95 |
73 pages |
| Authors:
Glenn B. Hoidale; Wayne L. Flowers; Linda Parker-Sedillo; ARMY RESEARCH LAB WHITE SANDS MISSILE RANGE NM
|
| Composite vertical profiles of virtual temperature within the boundary layer and troposphere over White Sands Missile Range, NM using Radio Acoustic Sounding Systems (RASS) data were first made available over the Internet in Feb 94. The composite virtual temperature profiles are based on selected levels of air temperature from a fixed tower and from the RASS associated with 924. 404 and 50-MHz radar profilers located at the Atmospheric Profiler Research ... |
|
| VOCAR: An Experiment in Variability of Coastal Atmospheric Refractivity |
OCT 94 |
5 pages |
| Authors:
Richard A. Paulus; NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA
|
| A previous radio-meteorological experiment conducted along the coast of southern California showed a high correlation between UHF signals and the base of the elevated temperature inversion. A reanalysis of this experimental data with a recently developed hybrid propagation model confirmed this correlation and a method to remotely sense the refractive structure was proposed. An experiment called Variability of Coastal Atmospheric Refractivity (VOCAR) was designed under a larger program called Coastal ... |
|
| Upper-Air Data Collected on Ice Station Weddell |
AUG 94 |
67 pages |
| Authors:
Kerry J. Claffey; Edgar L. Andreas; Aleksandr P. Makshtas; COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
|
| From February to June 1992, as Ice Station Weddell (ISW) drifted through the uncharted western Weddell Sea, we launched radiosondes, typically twice a day, to study the structure of the lower atmosphere. Here, we describe the 15W radiosounding program, report on the availability of the data, and offer preliminary analyses of some of the atmospheric features we observed. For 10 days in late May and early June, as the Russian ... |
|
| Air-Sea Interaction Patterns in the Equatorial Pacific |
DEC 93 |
194 pages |
| Authors:
John E. Kent; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| We have investigated air-sea interaction patterns in the equatorial Pacific during the 1991-1992 El Nino/Southern Oscillation (ENSO) event. Our study focused on the identification of spatial and temporal relationships between sea surface temperatures, subsurface temperatures, and winds. These relationships were examined using time series and statistical analyses of atmosphere and ocean data from the moored buoys of the Tropical Oceans-Global Atmosphere (TOGA) program. Our results strongly suggest that the heat ... |
|
| Temporal Variability of the Trade Wind Inversion: Measured with a Boundary Layer Vertical Profiler |
MAY 92 |
106 pages |
| Authors:
Cecilia M. Grindinger; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| This study uses Hawaiian Rainband Project (HaRP) data, from the summer of 1991, to show a boundary layer wind profiler can be used to measure the trade wind inversion. An algorithm has been developed for the profiler that objectively measures the depth of the moist oceanic boundary layer. The Hilo inversion, measured by radiosonde, is highly correlated with the moist oceanic boundary layer measured by the profiler at Paradise Park. ... |
|
| Cloud Radiative Effects and Associated Changes in Tropospheric Temperature and Winds at the South Pole During Austral Winter, |
MAR 1992 |
|
| Authors:
Robert S. Stone; Jonathan D. Kahl; COLORADO UNIV AT BOULDER
|
 | Both the increasing concentrations of greenhouse gases and potential changes in cloud distributions are likely to affect the surface energy budget of the polar regions. Changes in the polar atmosphere are, linked to dynamical processes that control the transport of mass, heat, and moisture from lower latitudes and in turn, feed back into the global circulation. An assimilation of radiation and meteorological data collected at the South Pole during the ... |
|
| Variations in Cloudiness, Temperature and Satellite-Derived Outgoing Longwave Radiation for Alaska, |
MAR 1992 |
|
| Authors:
Gerd Wendler; ALASKA UNIV FAIRBANKS GEOPHYSICAL INST
|
| Monthly values of outgoing longwave radiation (OLR) from 1974 to 1990 were obtained from NOAA satellites. Seasonal variations in the OLR were related to cloudiness and surface temperature data for Alaska. It was found that higher amounts of cloudiness increase the OLR in winter for most of Alaska, but decrease it in summer. For one particular location, Barter Island, trends in cloudiness, temperature, and OLR will be discussed and the ... |
|
| Thermodynamic Structure of Subsidence Inversions in the Atlantic Subtropical Anticyclone Regime |
92 |
87 pages |
| Authors:
Mark B. Miller; FLORIDA STATE UNIV TALLAHASSEE
|
| Data obtained from the eastern Atlantic Ocean for June 1980-1990 were examined to determine the mean thermodynamic structure of the boundary layer, subsidence inversion layer, and free atmosphere above the subsidence inversion layer along the eastern periphery of the Atlantic subtropical anticyclone. Moist intrusions in the free atmosphere above the subsidence inversion were found to exist in many cases. Differences in the thermodynamic structure were found between soundings with and ... |
|
| Modelling and Prediction of Regions of the North Pacific |
08 AUG 91 |
11 pages |
| Authors:
Allan R. Robinson; HARVARD UNIV CAMBRIDGE MA DIV OF APPLIED SCIENCES
|
| This was a project for the identification and description of the phenomenology and research into the development of a nowcast and forecast scheme for the frontal location and predominant features of the sub-arctic frontal region of the North Pacific Ocean. The potential coupling of the Harvard Open Ocean Model (HOOM) to a regional ocean model was investigated. |
|
| Focusing on Acoustic Waves in a Non-Uniform Atmosphere |
MAY 89 |
|
| Authors:
Gil E. Smith; ARMY LAB COMMAND WATERTOWN MA MATERIAL TECHNOLOGY LAB
|
| The blast scaling principle by charge weights may often produce gross errors in the estimation of overpressures at significant distances from a shot site. The principle ignores weather conditions and assumes a homogeneous atmosphere. Weather conditions may cause variations in the velocity of sound which allows the atmosphere to refract sound waves and act as an acoustic lens. Certain weather conditions such as temperature inversions may allow an acoustic focus ... |
|
| An Aircraft Investigation of a Convective Boundary Layer Over Lake Michigan |
89 |
|
| Authors:
Mary L. Hart; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Meteorological data from research flights have been used to study the structure of a Type I Cloud-Topped Boundary Layer (CTBL) that formed as a result of air mass modification by a Cold Air Outbreak (CAO) over Lake Michigan on 10 January 1984. Surface and upper air data were used as a source of information to describe the synoptic scale conditions that accompanied the CAO event. Vertical cross-sections of the CTBL ... |
|
| Oceanographic Data Report for South West Pacific Cruises in the SEAMAP Series. Part 1. Summer Survey Data 1984 to 1987 |
SEP 88 |
|
| Authors:
L. J. Hamilton; J. A. Boyle; WEAPONS SYSTEMS RESEARCH LAB ADELAIDE (AUSTRALIA)
|
| Six oceanographic surveys have been made in the south west Pacific Ocean on HMAS Cook from January 1984 to September 1987 as part of an investigation of physical and acoustical oceanographic parameters known as project SEAMAP. This report presents summer survey data for bathymetry, sea surface temperature, wind speed, sea state and swell, and from expendable bathy- thermograph (XBT) drops, and CTD and Nansen stations. Underway data are mostly presented ... |
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| An Observational Case Study of Mesoscale Convection over Lake Michigan on 10 January 1984 |
87 |
|
| Authors:
Steven R. Gilbert; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Surface, upper air, and aerological data from the Lake-Effect Snow Studies (LESS) field program conducted 1 Dec - 28 Jan 1984 were examined to study the modification of continental polar air masses heated from below by the large, comparatively warm Great Lakes. This study focused on one particular cold air outbreak that occurred as a northerly flow event over Lake Michigan 10 Jan 1984. Spatial cross-sections and streamline analyses show ... |
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| Characteristics of Mesocale Island Barrier Cloud Phenomena Observed in Satellite and Space Shuttle Imagery |
DEC 86 |
|
| Authors:
David R. Markley Jr; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Mesoscale island barrier effects occur in the lee of islands and are observed in satellite imagery and in photographs from manned spaceflight missions. These phenomena arise when, in the presence of a low-level inversion, the boundary layer flow is disturbed by a barrier. Five types of island barrier effects are examined: a) von Karman vortices, b) single plumes, c) transitions from vortices to plumes, d) calmsea streaks and e) ship ... |
|
| Comparison between the North and South Pacific Oceans of Acoustic Propagation in Secondary Sound Channels |
07 JUL 86 |
|
| Authors:
David G. Browning; NAVAL UNDERWATER SYSTEMS CENTER NEW LONDON CT NEW LONDON LAB
|
| This document is a summary of the extent and causes of secondary sound channel formation in the Pacific Basin. In the North Pacific above 40 deg North latitude and in the Western Pacific near the equator, both regions where the average precipitation is greater than evaporation, secondary sound channels due to temperature inversions are found over extensive areas. In the Central South Pacific and to a lesser extent in the ... |
|
| Average Collisional Vibrational Energy Transfer Quantities. The Exponential Model |
15 NOV 85 |
|
| Authors:
B. S. Rabinovitch; UNIV OF WASHINGTON SEATTLE DEPT OF CHEMISTRY
|
| The important collisional energy transfer ratio, gamma = sub all/ sub d was examined by using a fitted classical approximation for the density of internal energy eigenstates. The exponential form of the collisional energy transfer probability function was applied to four model unimolecular reaction systems. Two parameters, the inversion temperature TI and the effective temperature Te (defined previously in I), were employed to develop a form for the parametric dependence ... |
|
| An Investigation of the Atmospheric Boundary Layer over the Arctic Ocean Using SODAR (Sound Detection and Ranging) |
SEP 85 |
|
| Authors:
Etienne de Rouge; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| An attempt to describe the atmospheric boundary layer during the (Marginal Ice Zone Experiment) MIZEX 84 from 11 July to 17 July was made using a sodar system. The computation of the temperature structure parameter CT2 in the surface layer using in situ measurements allowed the calibration of the system. A program was developed to obtain the inversion layer height Zi, where the signal reaches a maximum. The thickness of ... |
|
| Turbulent Structure of Stably Stratified Nocturnal Slope Flows |
APR 85 |
|
| Authors:
J. C. Doran; T. W. Horst; BATTELLE PACIFIC NORTHWEST LAB RICHLAND WA
|
| Turbulence characteristics of wind and temperature fields in drainage flows over a simple slope were studied. Data was collected on a simple, nearly two-dimensional mountain ridge with little vegetation. Anemometers, thermistors, and thermometers were used to collect mean and turbulent wind and temperature data 150 m below the ridgeline. Evidence for katabatically driven winds was found for a wide range of ambient conditions whenever a surface inversion was formed. When ... |
|
| Average Collisional Vibrational Energy Transfer Quantities and the Inversion Temperature |
15 MAR 85 |
|
| Authors:
D. C. Tardy; B. S. Rabinovitch; UNIV OF WASHINGTON SEATTLE DEPT OF CHEMISTRY
|
| Collisional efficiencies for vibrational energy transfer have previously been related to certain quantities, which have been examined here as a function of molecular complexity, critical reaction threshold, E sub O temperature and energy transfer step size. Model calculations were made for the decomposition of nitryl chloride and for the isomerizations of methyl isocyanide, cyclopropane and cycloheptatriene. Additional keywords: high temperature; inversion temperature; surfaces; tin; vibrational relaxation. |
|
| Simulation of the Coupled Atmospheric and Oceanic Boundary Layer Model during MILDEX |
DEC 84 |
|
| Authors:
J. W. Swaykos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A coupled, oceanic-atmospheric boundary layer model which provides single-station prediction capability is evaluated relative to boundary layer observations. The model is initialized and verified using data obtained during the 1983 Mixed Layer Dynamics Experiment (MILDEX). Model prediction of inversion height, lifting condensation level, air and sea temperatures, specific humidity and mixed layer depth are compared with observations. A significant model shortcoming is the over-prediction of cloud thickness. Consequently, shortwave radiation ... |
|
| The Behavior of the Atmosphere in the Desert Planetary Boundary Layer |
14 OCT 84 |
|
| Authors:
L. Berkofsky; BEN-GURION UNIV OF THE NEGEV SEDE BOQER (ISRAEL) JACOB BLAUSTEIN INST FOR DESERT RESEARCH
|
| One of the aims of this investigation was to develop a limited area planetary boundary layer desert model for computers of limited power. We derived a general system of vertically integrated equations, including a dust concentration equation and an inversion height equation. The boundary layer was divided into a constant flux layer, a transition layer, and an inversion layer. The model equations predict the mean (vertically averaged) winds in the ... |
|
| Transhorizon Microwave Propagation Measurements Related to Surface Meteorological Parameters, |
FEB 1984 |
|
| Authors:
R. Ambrosini; M. Caporaloni; G. Tomassetti; BOLOGNA UNIV (ITALY)
|
| Experimental results of three months of continuous measurements at 3cm. wavelengths are given for the following aligned paths; the first, 100 Km. long, over flat land (Po Valley); the second, 140 Km, long, across the Adriatic sea; the third consisting of the sum of the previous ones. The stations are linked by radiowaves only during super standard atmospheric conditions. The period considered was in the autumn-winter season, from October to ... |
|
| Boundary Layer Structural Analysis of Large Scale Precipitation at Weather Front |
09 DEC 83 |
|
| Authors:
T. Shiyan; Z. Cuiquan; Y. Zhoujia; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
| Atmospheric precipitation forecasting has long been a difficult problem. One of the main reasons is possibly that the median scale triggering regime of precipitation has not been sufficiently explained. This paper uses observation data at the 325-m meteorological tower at the Inst. of Atmospheric Physics of the Chinese Academy of Sciences, sounding data of acoustic radar, and conventional data to analyze the triggering regime of two heavy rainfalls in the ... |
|
| Wave Characteristics of Temperature Inversion Process of Nighttime Radiation |
09 DEC 1983 |
|
| Authors:
M. Zhou; Y. Zhang; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
|
| Development of a Microcomputer Coupled Atmospheric and Oceanic Boundary Layer Prediction Model |
DEC 1983 |
|
| Authors:
G. L. Tarbet; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A coupled Marine Atmospheric Boundary Layer (MABL) and Oceanic Boundary Layer (OBL) model is developed using the Naval Postgraduate School and Garwood models respectively. All coding is done on the Hewlett-Packard 9845 microcomputer with emphasis on ease of use. The model is used to explore cases when feedback between the boundary layers significantly influences model forecasts. The sensitivity of the model to slight input variations is explored. Light wind situations ... |
|
| An Evaluation of Marine Fog Forecast Concepts and a Preliminary Design for a Marine Obscuration Forecast System |
JUN 1983 |
|
| Authors:
E. J. Mack; C. W. Rogers; B. J. Wattle; ARVIN/CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
|
| Calspan's studies produced phenomenological descriptions of at least five new fog types, provided realistic verification on which to base new numerical modeling techniques, and developed synoptic and statistical relationships which could be used in operational forecasting. Under the current contract, Calspan conducted an objective evaluation of these predictive approaches, along with a select group of numerical models, by testing against data sets derived from at-sea observational studies. The results of ... |
|
| Analysis and Prediction of Severe Storm Environment |
FEB 1983 |
|
| Authors:
Toby N. Carlson; Thomas T. Warner; Michael J. Fritsch; PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF METEOROLOGY
|
| The most significant aspect of this research regards the role of differential surface heating and topography in the development of mesoscale weather. Research has progressed in four areas: conceptual development, model development, model sensitivity tests, and prediction. The effect of surface heating and topography on precipitation and lid generation are forming the basis of current and on-going numerical and conceptual research. The effect of variations in soil moisture on the ... |
|
| Significant Events in Low-Level Flow Conditions Hazardous to Aircraft. |
JAN 1983 |
|
| Authors:
Margaret B. Alexander; Dennis W. Camp; NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HUNTSVILLE AL GEORGE C MARSHALL SPACE FLIGHT CENTER
|
| Atmospheric parameters recorded at the NASA 150-meter Ground Winds Tower Facility at Kennedy Space Center during high surface winds are analyzed to determine magnitude, frequency, duration, and simultaneity of occurrence of low-level flow conditions known to be hazardous to the ascent and descent of conventional aircraft and the Space Shuttle. Graphic and tabular presentations of mean and extreme values and simultaneous occurrences of turbulence (gustiness and gust factor), wind shear ... |
|
| Test of an Inversion Algorithm for Spectrally Resolved Limb Radiance Profiles |
28 SEP 1982 |
|
| Authors:
A. S. Zachor; R. D. Sharma; UTAH STATE UNIV LOGAN
|
| Tests were performed on a recursive algorithm that recovers vertical distributions of concentration and temperature by inversion of spectrally resolved IR limb radiance profiles. The tests, which used synthetic data with added noise, established that the method can recover sharply peaked concentration profiles. The study results also give an indication of the spectral signal-to-noise requirements of the method. (Author) |
|
| Numerical Methods Make Lens Antennas Practical. |
SEP 1982 |
|
| Authors:
J. J. Lee; HUGHES AIRCRAFT CO FULLERTON CA GROUND SYSTEMS GROUP
|
|
| The Data Base for the May 1979 Marine Surface Layer Micrometeorological Experiment at San Nicolas Island, California |
07 MAY 1982 |
|
| Authors:
Theodore V. Blanc; NAVAL RESEARCH LAB WASHINGTON DC
|
| One hundred thirty-six hours of gradient (profile) and bulk aerodynamic measurements of momentum, moisture, and sensible heat flux, accompanied by determinations of stability, drag coefficient, roughness length, and sky radiation were made in the marine atmospheric surface layer over the Pacific Ocean from an upwind, low-profile promontory of San Nicolas Island, California. Over a 10-day period a wide variety of meteorological and oceanographic conditions were observed in which 30-minute average ... |
|
| The Behavior of the Atmosphere in the Desert Planetary Boundary Layer |
30 APR 1982 |
|
| Authors:
Louis Berkofsky; BEN-GURION UNIV OF THE NEGEV SEDE BOQER (ISAREL) JACOB BLAUSTEIN INST FOR DESERT RESEARCH
|
| The processes taking place in the atmospheric desert planetary boundary layer determine the evolution of those circulations which control not only its subsequent behavior, but that of the atmospheric layers above it. The structure of the boundary layer at any given time determines the subsequent low level stratification, and hence the occurrence of such phenomena as radar ducting, dust/sand storms, low level jets. The general objective of the proposed research ... |
|
| Performance of Temperature/Dew Point Instruments |
APR 1982 |
|
| Authors:
Christopher Biltoft; ARMY DUGWAY PROVING GROUND UT
|
| A series of field trials was conducted to assess the performance of temperature/dew point systems used at the US Army Dugway Proving ground, UT. Data quality was degraded by noise, calibration drift, and exposure to adverse ambient conditions. Improved noise reduction procedures, particularly improved computer program noise filters, are needed. Calibration drift can be detected by comparison with a standard in the field or by deployment of instruments in pairs ... |
|
| Marine Atmospheric Boundary Layer and Inversion Forecast Model |
MAR 1982 |
|
| Authors:
David Almy Brower; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A computer code for prediction of the marine atmospheric boundary layer is developed. The code is used to predict changes of the capping inversion height, the strength of the specific humidity and potential temperature 'jumps' at the inversion, the well-mixed relative humidity in the layer and the lifting condensation level for possible cloud/fog formation. The code is based on recently formulated integrated models for the clear or cloudy marine. Planetary ... |
|
| Vertical Temperature Stratification of the Atmosphere in an Area of the High Tatra Mountains |
18 FEB 1982 |
|
| Authors:
J. Otruba; FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH
|
|
| A Feasibility Study of Numerical Simulation of Inversion-Rising Marine Stratus and Fog |
AUG 1981 |
|
| Authors:
C. William Rogers; James T. Hanley; CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
|
| Raising of the marine inversion above the lifting condensation level by mesoscale vertical motion associated with warm water patches can produce stratus and subsequently fog may form. The feasibility of numerical simulation of these inversion rising situations was examined. A modified numerical framework, constructed from the Lavoie model, is capable of simulating the effect of warm water patches on the formation of stratus/fog during inversion rising situations. However, the operational ... |
|
| An Investigation of Marine Fog Forecast Concepts. |
JAN 1981 |
|
| Authors:
C. W. Rogers; E. J. Mack; R. J. Rilie; B. J. Wattle; CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
|
| As a follow-on to eight years of field study of marine fog, an investigation of potential fog forecasting concepts was initiated. Task 1 involved examination and interpretation of synoptic scale meteorological data in terms of micro- and meso-scale marine fog data acquired by Calspan on previous West Coast field studies. The results of this investigation were summarized in an experimental 'decision tree' for use in the forecasting of marine fog. ... |
|
| Comparison of the Marine Index of Refraction Structure Parameter, C2n, Model with Optical Measurements. |
DEC 1980 |
|
| Authors:
Andreas K. Goroch; NAVAL ENVIRONMENTAL PREDICTION RESEARCH FACILITY MONTEREY CA
|
| The Monterey Bay turbulence model verification experiment was conducted to verify correlation models of bulk meteorological and optical turbulence. Laser scintillometer measurements were compared to predictions of the bulk model using meteorological data measured by R/V ACANIA. Results indicate that the model predicts optical turbulence to within a factor of two in homogenous cases. Satellite measurements suggest possible applications to verifying homogeneity for use of the bulk models. The bulk ... |
|
| Outflow from a Nocturnal Thunderstorm. |
NOV 1980 |
|
| Authors:
Robert W. Scott; ILLINOIS STATE WATER SURVEY URBANA
|
| An investigation of a dry nocturnal gust front moving over a dense network of meteorological instruments in east central Illinois is presented. The outflow was generated out of an eastward moving, organized storm system passing north of the network. Although no precipitation was measured in the network, a change from ambient to outflow air was observed in other meteorological parameters more than 100 km south of the point at which ... |
|
| Deformation of the Marine Inversion and the Development of Marine Fog and Stratus Resulting from Warm Water Patches: Numerical Modeling and Verification with Satellite Imagery. |
NOV 1979 |
|
| Authors:
C. William Rogers; James T. Hanley; CALSPAN ADVANCED TECHNOLOGY CENTER BUFFALO NY
|
| The results presented here represent the initial application of a numerical model, designed originally to study snow storms occurring downwind of a warm lake, to stratus/fog systems occurring downwind of the warm water patches inthe ocean. Major differences between the two applications include: (1) an order of magnitude difference in inversion heights, with the base of the marine layer inversion being typically a few hundred meters above the surface and ... |
|
| 1978 Marine Boundary Layer Study (MABLES-WC). |
16 DEC 1978 |
|
| Authors:
G. E. Schacher; E. Garner; T. Usher; C. W. Fairall; K. L. Davidson; NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
|
| During August of 1978 meteorological data was collected at sea off the central coast of California. This report describes the plan of the ships operations and the type of measurements made. The data obtained has been corrected for instrument calibration and is also presented. (Author) |
|
Reports by Keyword(s)
TEMPERATURE INVERSION
