A5028212429- Meteorological Phenomena and Simulations
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Wind and Air Flow Studies
- Atmospheric aerosols and clouds
- Precipitation Measurement and Analysis
- Simulation Techniques and Applications
- Atmospheric and Environmental Gas Dynamics
- Fire effects on ecosystems
- Geophysics and Gravity Measurements
- Plant Water Relations and Carbon Dynamics
- Satellite Communication Systems
- Radioactive contamination and transfer
- Hydrological Forecasting Using AI
- Ionosphere and magnetosphere dynamics
- Health Sciences Research and Education
- Flood Risk Assessment and Management
- Advanced Computational Techniques and Applications
- Environmental Changes in China
- Air Traffic Management and Optimization
- Meta-analysis and systematic reviews
- Fault Detection and Control Systems
- Aerospace and Aviation Technology
- Climate Change and Geoengineering
- Soil Moisture and Remote Sensing
University of Oklahoma
2013-2024
American Meteorological Society
2001-2018
University of Massachusetts Amherst
2009
Colorado State University
2009
University of Puerto Rico-Mayaguez
2009
NOAA National Severe Storms Laboratory
2000-2009
McGill University
2009
TRW Automotive (United States)
2001
IR Dynamics (United States)
2001
Yankee Environmental System (United States)
2001
An explicit cloud prediction model has been developed and incorporated into the Eta Model at National Centers for Environmental Prediction. In this scheme, only one predictive variable, mixing ratio, is added to model's prognostic equations represent both liquid water ice. Precipitation diagnostically calculated from ratio. Extensive tests have performed. The statistical results show a significant improvement in precipitation forecasts. Diagnostic studies suggest that inclusion of ice...
Dense networks of short-range radars capable mapping storms and detecting atmospheric hazards are described. Composed small X-band (9.4 GHz) spaced tens kilometers apart, these defeat the Earth curvature blockage that limits today s long-range weather enables observing capabilities fundamentally beyond operational state-of-the-art radars. These include multiple Doppler observations for horizontal wind vectors, subkilometer spatial resolution, rapid-update (tens seconds) extending from...
This paper describes the Verification of Origins Rotation in Tornadoes Experiment planned for 1994 and 1995 to evaluate a set hypotheses pertaining tornadogenesis tornado dynamics. Observations state variables will be obtained from five mobile mesonet vehicles, four ballooning laboratories, three movie photography teams, portable Doppler radar two situ instruments deployment T-28 National Atmospheric Oceanic Administration P-3 aircraft. In addition, extensive use made new generation...
© 2023 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). Corresponding author: Jerald A. Brotzge, jerald.brotzge@wku.edu
Abstract The NOAA Science Advisory Board appointed a task force to prepare white paper on the use of observing system simulation experiments (OSSEs). Considering importance and timeliness this topic based paper, here we briefly review OSSEs in United States, discuss their values limitations, develop five recommendations for moving forward: national coordination relevant research efforts, acceleration OSSE development Earth models, consideration potential impact deficiencies current data...
More than 120 scientists, engineers, administrators, and users met on 8–10 December 2003 in a workshop format to discuss the needs for enhanced three-dimensional mesoscale observing networks. Improved networks are seen as being critical advancing numerical empirical modeling variety of applications, including severe weather warnings forecasts, hydrology, air-quality forecasting, chemical emergency response, transportation safety, energy management, others. The participants shared clear...
Sixty-eight comma-cloud systems over the Great Plains during two spring seasons were examined using satellite imagery and rawinsonde data. Composite soundings produced for each of ten distinct parts comma cloud in order to describe quantitatively atmospheric structure associated with wave cyclones that 585 severe weather events. sectionals document different kinematic thermodynamic environment part system. Relative-wind, isentropic analyses show air flow relative storm provide additional...
The pretropical storm Agnes rainstorm across western New York and Pennsylvania is analyzed using conventional surface aerological data. Hourly precipitation maps showed the north-eastward motion intensification of a developing rain area over eastern Kentucky at 1200 GMT 20 June 1972. This remained separate entity from main rainshield. Nonlinear balanced omega as well kinematic computations suggest that weak short wave in mid upper troposphere provided initial triggering mechanism for growth...
Current observation systems that provide data for the analysis and prediction of climate day-to-day weather are described, along with plans future systems. The basic principles satellite, radar, lidar, sodar measurements summarized. Temperature moisture on planetary synoptic scales, ranging from satellites, radiosonde network, aircraft, other sounding described. Wind rawinsondes, air composition energy budget, surface also discussed. measuring mesoscale convective-scale then noted, including...
A limited primitive equation model has been used to study the feasibility of four-dimensional data assimilation in monsoon region and, further, applicability several techniques currently being employed global models. The two fundamental objectives this research are (i) understand how atmosphere responds insertion asynchronous and its impact on assimilation-prediction cycle, (ii) determine what strategies work best for limited-area models tropics. sequence ten experiments performed using...
The problem of rainfall prediction for a tropical storm over the United States is examined from diagnostic point view. A moisture budget constructed and differences between computed observed precipitation are discussed. Although areal averages were comparable, point-by-point agreement was only fair. Stable convective then using methods common to many numerical models. discrepancies forecast assumed be due incomplete formulation amount available convection. This leads an expression...
Abstract The Nationwide Network of Networks (NNoN) concept was introduced by the National Research Council to address growing need for a national mesoscale observing system and continued advancement toward accurate high-resolution numerical weather prediction. research test bed known as Dallas–Fort Worth (DFW) Urban Demonstration created experiment with many kinds observations that could be used in data assimilation system. Many nonconventional observations, including Earth Citizen Weather...
Two methods for objective analysis of wind profiler data in time-height space are proposed and compared. One is a straightforward adaptation procedure developed by Doswell introducing time continuity into sequence spatial analyses. The second technique, named the correlation method, introduces new rationale selection Barnes filter parameter that based on knowledge statistical structure data. advantages disadvantages each method discussed. It noted principle, allows deduction consistent...
The major results and discussion items presented at the 1998 Workshop on mesoscale model verification, held 18–19 June in Boulder, Colorado, are summarized. This forum represents perhaps first attempt to bring together modeling statistical communities an discuss most challenging issues related verifying forecasts. Pervading was issue of uncertainty predictions observations how account for this when performing verification. article discusses techniques verify both deterministic probabilistic...
Abstract Mesoscale convective systems that affect a limited area within the southern plains of United States during late morning hours warm season are investigated. A climatological study over 5-yr period documents initiation locations and times, tracks, associated severe weather, relation to synoptic features lifetimes 145 systems. An assessment is also made system evolution in each case morning. For subset 48 systems, vertical profiles basic variables from Rapid Update Cycle (RUC) model...
Abstract Forecast sensitivity to observation (FSO) methods have become increasingly popular over the past two decades, providing ability quantify impacts of various observing systems on forecasts without having conduct costly data denial experiments. While adjoint- and ensemble-based FSO are employed in many global operational systems, their use for regional convection-allowing assimilation (DA) forecast not been fully examined. In this study, ensemble (EFSO) is explored high-frequency...
Cloud-to-ground (CG) lightning data are examined relative to digitized radar for a storm system that occurred in Oklahoma on 26 May 1985. This evolved through three stages: 1) two lines of cells, one near the dryline and other 60 km ahead it; 2) supercell storm; 3) mesoscale convective (MCS). The behavior each stage was different. Initially no ground flashes were observed either line until reflectivity increased ≥46 dBZ vertically integrated liquid (VIL) ≥10 kg m−2; then flash rates remained...
The problem of four-dimensional data assimilation in the tropics has been studied using a limited-area primitive equation model. Of prime concern is relative importance different update variables and their impact on assimilation. Five new experiments complement set ten previously reported that investigate feasibility monsoon region only wind observations. In addition to assessing variables, present study investigates role model physics are carried out for onset vortex case 1979 Indian summer...
A scale-separation technique based on two-dimensional Fourier decomposition is applied to the comparison and verification of analyses forecasts produced by regional numerical weather prediction systems. major emphasis this study secondary or derived parameters in addition evaluation primary model variables. Two models are used illustrate for a variety forecast fields separated into three separate wavenumber bands. Three different sets analyses, one from each system an independent set, both...
Kinematic and thermodynamic quantities derived from wind profiler triangles are used to help describe the structure of both an amplifying decaying baroclinic wave as they traversed portions demonstration network. The data provide excellent diagnoses cyclogenetic processes associated with system cyclolytic system. importance a wave's vertical tilt profiler-derived advective patterns systems relate surface evolution shown be consistent conceptual models waves. These structural aspects observed...