Date post: | 30-Dec-2015 |
Category: |
Documents |
Upload: | jocelyn-summers |
View: | 215 times |
Download: | 0 times |
Short Course on Satellite Meteorology
11 January 1998 Phoenix, Arizona
Applications and Interpretation: Part 3 - Sounder Products and Applications
Donald G. GrayNOAA/NESDIS
Office of Research and ApplicationsWashington, DC
AMS 78th Annual Meeting
Presentation Outline
I. Brief review of remote sensing fundamentals, including absorption spectra and weighting functions
II. Characteristics of GOES soundings ( spatial coverage, production methodology, derived parameters) and validation)
III. Applications of GOES sounding products to weather analysis and forecasting.
Absorption Spectra
Transmittances, Weighting Functions
Examples of GOES Sounder Channels
Remote Sensing Fundamentals - Satellite Soundings
Longwave CO2
Mid-wave H2O
Shortwave CO2
Visible
Characteristics of GOES Satellite Soundings
Spatial Coverage, Frequency
Resolution, Effects of Clouds
Use of NWP Model Forecast (ETA)
Production Methodology
Radiosonde Comparison Statistics
ETA Forecast Model Impact Study
Quality Assessment
Applications/Examples of GOES Sounding Products
Nowcasting/Forecasting of Severe Weather
Horizontal Fields of Derived Products
Individual Soundings and Associated Parameters
Derived Product Images
Gradient Winds
Sounder Water Vapor Winds
Effective Cloud Amount and Cloud Top Pressure
Summary
GOES Soundings Provide 24 Hour High Resolution Coverage for CONUS and Adjacent Ocean Areas
Horizontal Resolution of ~50KM (~30KM Currently in Experimental Mode)
Provide Information on Mesoscale Features of Moisture and Stability in Pre-Convective Environments
Case Studies Indicate Strong Correlation Between GOES Soundings’ Fields and Convective Development
Other Applications: Depiction of Moisture: Eastern Pacific, Gulf of Mexico Return Flow, Southwest Monsoons, East Coast Winter Storms
Positive impact demonstrated using GOES TPW in ETA Forecast Model
Summary (cont’d)
Limitations :
Coarse vertical resolution (~3 - 4 km)
Soundings Precluded in Cloudy Areas Geographic Coverage Limited by Slow Scan Rate
Retrieval of Boundary Layer T/Td Not Possible
http://orbit7i.nesdis.noaa.gov:8080/temp.html
Acknowledgments
Tim Schmit, Tony Schreiner, CIMSS, University of Wisconsin
Bill Smith, Kit Hayden and Paul Menzel
Jaime Daniels (NOAA), Gary Gray (Raytheon/Hughes)
Web Addresses (NOAA/NESDIS/ORA)
http://orbit7i.nesdis.noaa.gov:8080/goes.html
GOES Sounder Products
Other GOES Quantitative Products
http://orbit7i.nesdis.noaa.gov:8080/index.htmlPOES/GOES Satellite Products
Colocation Statistics - Total Precipitable Water (mm)
Radiosondes vs. ETA Forecast and GOES Soundings
Root Mean Square Error