Table of Contents

RAP Annual Scientific Report 1998

• I. Introduction
• A. Mission
• B. Historical Perspective
• C. Approach to Technology transfer
• D. Strategic Goals
• II. Most Significant Achievements During 1998
• III. Major Scientific Achievements in RAP During 1998
• A. In-Cloud Icing
• 1. Background
• 2. Icing climatology based on aircraft data
• 3. NASA/Lewis supercooled large drop project
• 4. Integrated icing diagnostic algorithm
• 5. Evaluation of improvements in in-flight icing algorithms
• 6. Detection of aircraft icing in a mixed phase cloud using dual wavelength radar
• 7. Microphysical modeling of in-flight icing conditions
• B. Snowfall and Freezing Precipitation
• 1. Background
• 2. Demonstration of the WSDDM system at LaGuardia
• 3. Evaluation of the effect of wind on the performance of snowgauges
• 4. Evaluation of ASOS instrumentation to detect and measure winter precipitation
• C. Convective Weather Nowcasting
• 1. Background
• 2. 1998 field programs
• 3. Development of a national convective forecast product
• 4. Thunderstorm auto-nowcaster system
• D. Atmospheric Turbulence
• 1. Background
• 2. In-situ turbulence measurement
• 3. Terrain-induced turbulence - Juneau
• 4. Turbulence forecasting
• 5. Remote sensing of turbulence
• E. Numerical Weather Prediction
• 1. Background
• 2. Development of operational meso-gamma scale numerical weather prediction systems for Army test ranges
• 3. Use of the Penn State/NCAR MM5 modeling system to provide meteorological information for a forensic study of the transport of hazardous material from the Khamisiyah, Iraq weapons deport
• F. Hydrologic run-off modeling
• 1. Background
• 2. An evaluation of model- and radar-based convective precipitation estimates for use in runoff-model predictions of flash floods in complex terrain
• G. Remote Sensing of Precipitation
• 1. Background
• 2. Radar estimation of rainfall
• 3. Multi-parameter radar detection of precipitation type
• 4. Influence of beam blockage on rainfall estimates from reflectivity and propagation phase shift
• H. Analysis of Precipitation Enhancement Potential
• 1. Background
• 2. Evaluation of the potential of rain augmentation in Coahuila, Mexico through hygroscopic seeding
• 3. Studies of inadvertent weather modification by fire produced smoke in Indonesia and Mexico
• I. Intelligent Weather System
• J. Web Based Dissemination of Weather Information
• K. Staff and Visitors
• L. 1998 RAP Publications