Journal of Applied Meteorology: Recent submissions
Now showing items 4121-4140 of 6019
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Aerodynamic Properties of Urban Areas Derived from Analysis of Surface Form
(American Meteorological Society, 1999)Several methods to determine the aerodynamic characteristics of a site through analysis of its surface form (morphometry) are considered in relation to cities. The measures discussed include zero-plane displacement length ... -
Observations of Strong Surface Radar Ducts over the Persian Gulf
(American Meteorological Society, 1999)Ducting of microwave radiation is a common phenomenon over the oceans. The height and strength of the duct are controlling factors for radar propagation and must be determined accurately to assess propagation ranges. A ... -
A Numerical Study of Thermal Effects on Flow and Pollutant Dispersion in Urban Street Canyons
(American Meteorological Society, 1999)This study investigates thermal effects on the flow and pollutant dispersion in urban street canyons. A two-dimensional numerical model with a k?? turbulent closure scheme is developed, and the heat transfer between the ... -
A New Method for Deriving Ocean Surface Specific Humidity and Air Temperature: An Artificial Neural Network Approach
(American Meteorological Society, 1999)A new methodology for deriving monthly averages of surface specific humidity (Qa) and air temperature (Ta) is described. Two main aspects characterize the new approach. First, remotely sensed parameters, total precipitable ... -
Separation of Convective and Stratiform Precipitation Using Microwave Brightness Temperature
(American Meteorological Society, 1999)This paper presents a new scheme that classifies convective and stratiform (C/S) precipitation areas over oceans using microwave brightness temperature. In this scheme, data are first screened to eliminate nonraining pixels. ... -
Cluster-Analysis Classification of Wintertime Wind Patterns in the Grand Canyon Region
(American Meteorological Society, 1999)Twelve typical wintertime wind patterns for the Grand Canyon region were derived from a two-stage cluster analysis wind-field classification scheme. The wind measurements were collected by a surface network of 15 stations ... -
A Modeling Study of the Influence of Ice Scavenging on the Chemical Composition of Liquid-Phase Precipitation of a Cumulonimbus Cloud
(American Meteorological Society, 1999)Evidence of the efficient removal of chemicals by ice particles has been deduced from past field experiments and laboratory studies. However, the ice phase has been poorly represented in prior cloud chemistry modeling. ... -
Tropical Ice Water Amount and Its Relations to Other Atmospheric Hydrological Parameters as Inferred from Satellite Data
(American Meteorological Society, 1999)An over-ocean ice water path (IWP) algorithm, using satellite Special Sensor Microwave Water Vapor Sounder (SSM/T-2) data, is presented for clouds during the Tropical Oceans Global Atmosphere Coupled Ocean?Atmosphere ... -
Midtropospheric Circulation Patterns Associated with Extreme Dry and Wet Episodes over Equatorial Eastern Africa during the Northern Hemisphere Spring
(American Meteorological Society, 1999)The anomaly circulation patterns of contrasting wet and dry episodes over the equatorial eastern Africa (EEA) region are studied using the European Centre for Medium-Range Weather Forecasts analyses. The study focuses on ... -
A Cloud-Patch Technique for Identification and Removal of No-Rain Clouds from Satellite Infrared Imagery
(American Meteorological Society, 1999)A new cloud-patch method for the identification and removal of no-rain cold clouds from infrared (IR) imagery is presented. A cloud patch is defined as a cluster of connected IR imagery pixels that are colder than a given ... -
Identification of Vertical Profiles of Reflectivity from Volume Scan Radar Data
(American Meteorological Society, 1999)The vertical variability of reflectivity in the radar beam is an important source of error that interferes with a reliable estimation of the rainfall rate by radar. This source of error can be corrected if the vertical ... -
Wintertime Boundary Layer Structure in the Grand Canyon
(American Meteorological Society, 1999)Wintertime temperature profiles in the Grand Canyon exhibit a neutral to isothermal stratification during both daytime and nighttime, with only rare instances of actual temperature inversions. The canyon warms during daytime ... -
Wind-Flow Patterns in the Grand Canyon as Revealed by Doppler Lidar
(American Meteorological Society, 1999)Many interesting flow patterns were found in the Grand Canyon by a scanning Doppler lidar deployed to the south rim during the 1990 Wintertime Visibility Study. Three are analyzed in this study: 1) flow reversal in the ... -
Wintertime Surface Wind Patterns in the Colorado River Valley
(American Meteorological Society, 1999)The diurnal variation of regional wind patterns in the complex terrain of the Grand Canyon area was investigated for wintertime fair weather days using a network of wind sensors on 10-m towers. Thermally driven along-slope ... -
Transport of a Power Plant Tracer Plume over Grand Canyon National Park
(American Meteorological Society, 1999)Meteorological and air-quality data, as well as surface tracer concentration values, were collected during 1990 to assess the impacts of Navajo Generating Station (NGS) emissions on Grand Canyon National Park (GCNP) air ... -
Wintertime Evolution of the Temperature Inversion in the Colorado Plateau Basin
(American Meteorological Society, 1999)The Colorado Plateau, surrounded by a ring of mountains, has the meteorological characteristics of a basin. Deep, persistent potential temperature inversions form in this basin in winter. The formation, maintenance, and ... -
Meteorological Processes Affecting the Transport of Emissions from the Navajo Generating Station to Grand Canyon National Park
(American Meteorological Society, 1999)During the 1990 Navajo Generating Station (NGS) Winter Visibility Study, a network of surface and upper-air meteorological measurement systems was operated in and around Grand Canyon National Park to investigate atmospheric ... -
A Simple All Weather Model to Estimate Ultraviolet Solar Radiation (290–385 nm)
(American Meteorological Society, 1999)A new expression to estimate the solar ultraviolet irradiance from parameters usually available in radiometric networks is presented. The authors have analyzed the relation between solar ultraviolet global irradiance ... -
Wavelet Applications for Mesocyclone Identification in Doppler Radar Observations
(American Meteorological Society, 1999)Severe weather often emanates from thunderstorms that have persistent, well organized, rotating updrafts. These rotating updrafts, which are generally referred to as mesocyclones, appear as couplets of incoming and outgoing ... -
Contribution of Mesoscale Convective Complexes to Rainfall in Sahelian Africa: Estimates from Geostationary Infrared and Passive Microwave Data
(American Meteorological Society, 1999)The contribution of mesoscale convective complexes to the July?September rainfall in Sahelian Africa is assessed using passive microwave data from the Special Sensor Microwave Image and infrared (IR) data from the European ...