High Quality Wind Retrievals for Hurricanes Isabel and Fabian ...

High Quality Wind Retrievals for Hurricanes Isabel and Fabian ...

High Quality Wind Retrievals for Hurricanes Using the SeaWinds Scatterometer W. Linwood Jones and Ian Adams Central Florida Remote Sensing Lab Univ. of Central FL Presentation Outline Hurricane Wind Vector Retrieval Issues CFRSL Hurricane Retrieval Algorithm QRad Rain Rate Algorithm Isabel and Fabian Results

Conclusion Issues with L2B Wind Vector Retrieval for Extreme Wind Events Wind retrievals not tuned for high wind speeds Geophysical Model Function developed for wind speeds < 20 m/s

CFRSL Approach Tropical Cyclone GMF tuned for retrieving high wind speeds Blended UMASS aircraft scat measurements and NSCAT GMF

Issues with L2B Wind Vector Retrieval for Extreme Wind Events Egg spatial resolution @ 25 km sampling is too coarse CFRSL Approach Uses

gridded slice sigma-o @ 12.5 Km sampling Latitude 25 km 50 km

25 km resolution using eggs Longitude Range gated slices from egg 30 km 25 km 6 km

12.5 km Issues with L2B Wind Vector Retrieval for Extreme Wind Events Rain has negative effects on wind measurements Rain attenuation lowers retrieved wind speeds Volume scattering increases retrieved wind

speeds and alters directional signatures Rain splash increases retrieved wind speeds and changes anisotropic ocean surface features MUDDH performance in hurricanes is poor Issues with L2B Wind Vector Retrieval for Extreme Wind Events Rain has negative effects on wind measurements

CFRSL Approach Simultaneous rain measurement using QRad Rain attenuation and volume backscatter correction provided Rain splash effect included in GMF Rain Quality Flags Provided

CFRSL Hurricane Retrieval Algorithm Slice sigma-0s for improved spatial resolution - 12.5 km Sigma-0 minimum eye location Wind speed retrieved from individual sigma-0 (assumed spiral wind directions) Rain inferred using QRad rain rate algorithm Sigma-0 corrections from atmospheric transmissivity and rain volume backscatter Flag pixels that correspond to high rain attenuation

QRad Algorithm Block Diagram QScat L1B sig-0 L2A Tbs Bin Slice Sig-0 Locate Center Atmos. Atten

and Backscatter Correction Retrieve Hurricane Wind Speed Wind Retrieval Hurricane Wind Speed QRad

Rain Rate Spiral Wind Direction Based upon Average of 4-flavor Sigma-0s 12.5 km sampling

Latitude Hurricane Eye Location Longitude QRad/SRad Rain Algorithm Look at noise channel of scatterometer Subtract

echo channel Calibrate radiometric temperature vs. TMI Train brightness temperature/rain rate relationship via TMI Coincident with scatterometer measurement QRad Integ. Rain Rate Product Improved CFRSL rain retrieval algorithm provides earth-gridded 50 km data

product Instantaneous km*mm/hr Resampled integrated rain rates > 2.4 to 12.5 km wind vector grid Latitude

QRad TRMM 2A12 Instantaneous Rain Rate Longitude Land QRad TMI

QRad TRMM 3B42RT HQ Instantaneous Collocated Low Rain event TMI QRad QRad TRMM 3B42RT HQ Instantaneous Collocated Moderate Rain event TMI

QRad QRad TRMM 3B42RT HQ Instantaneous Collocated High Rain Event TMI QRad CFRSL Integ. Rain Rate, km*mm/hr QRad (CFRSL) & TMI Integrated Rain

Rates for Simultaneous Events TMI Integ. Rain Rate, km*mm/hr AMSR vs. SRad Path Attenuation, Horizontal Polarization AMSR Attenuation SRad Attenuation 102

2003 Hurricane Results QuikSCAT Rev. 22055, Sept 13, 2003 22:04 Z (m/sec) HRD Wind Field, Time Interpolated CFRSL Wind Retrieval (mm/hr)

SSMI Rain Rate QRad Rain Rate SeaWinds Rev. 03927, Sept 15, 2003 15:40 Z (m/sec) HRD Wind Field, Time Interpolated CFRSL Wind Retrieval

(mm/hr) SSMI Rain Rate SRad Rain Rate QuikSCAT Rev. 22084, Sept 15, 2003 22:52 Z (m/sec) HRD Wind Field, Time Interpolated

CFRSL Wind Retrieval (mm/hr) SSMI Rain Rate SRad Rain Rate SeaWinds Rev. 03934, Sept 16, 2003 02:52 Z (m/sec)

HRD Wind Field 01:30 Z CFRSL Wind Retrieval (mm/hr) SSMI Rain Rate SRad Rain Rate SeaWinds Rev. 03934, Sept 16, 2003 02:52 Z

CFRSL Wind Retrieval JPL Wind Speed (m/s) CFRSL Wind Speed (m/s) JPL Wind Field HRD Modeled Wind Speed (m/s) HRD Modeled Wind Speed (m/s)

QuikSCAT vs. H* Wind Analysis SeaWinds vs. HRD Model CFRSL Algorithm Composite Wind Speeds Conclusion Ready to test current algorithm in operational environment

Acceptable estimates of high rain rates inside storm conditions Reasonable wind speed retrievals up to 40 - 45 m/s Work must be done to improve model function and rain backscatter and attenuation estimates Will

utilize UMass IWRAP and SFMR data set Have simultaneous AMSR and SRad for the 2003 hurricane season

Recently Viewed Presentations

  • Practical Clin Path Hemolytic Anemia Wendy Blount, DVM

    Practical Clin Path Hemolytic Anemia Wendy Blount, DVM

    50% FeLV or FIV positive. Splenomegaly common. PCR is available and a good test, but presence of organism does not always result in disease. Make smears immediately after capillary blood collection 9 (ear prick, lip prick) Organisms detach with time....
  • UML 101  An Introduction Julie Daniels Staff Software

    UML 101 An Introduction Julie Daniels Staff Software

    Standish Group, CHAOS Report, 2000 Requirements Not Managed Ambiguous Communication Brittle Architectures Overwhelming Complexity Undetected Inconsistencies Insufficient Testing Uncontrolled Change Propagation Use Component Architectures Develop Iteratively Manage Requirements Continuously Verify Quality Control Change Best Practices Model ...
  • 1 Lipids Copy There is more than one

    1 Lipids Copy There is more than one

    1. Lipids. Copy. There is more than one kind of fat. Saturated Fat. Saturated fat is an unhealthy fat that is naturally found in foods from animals such as fatty cuts of meat, poultry with the skin on and higher...
  • Multidisciplinary Approach for Healthy Brain Development Prevention &

    Multidisciplinary Approach for Healthy Brain Development Prevention &

    Helps determine what behaviors and individual will learn and remember. Size of an almond. Hippocampus Processing and storing information Evaluates threats by putting them into context of previous experiences Shape - Sea Horse Frontal Cortex Reins the amygdala and calms...
  • Design Patterns ECE 417/617: Elements of Software Engineering

    Design Patterns ECE 417/617: Elements of Software Engineering

    Design Patterns ECE 417/617: Elements of Software Engineering Stan Birchfield Clemson University What is a Design Pattern? A design pattern abstracts a recurring design structure comprises class and/or object dependencies, structures, interactions, or conventions distills design experience Re-use Code re-use...
  • International Telecommunication Union - ITU

    International Telecommunication Union - ITU

    * 1. Mobile Banking (for Banks) Mobile Banking (Cont.) Statistics * Mobile Transaction Systems Status (Cont.) Prerequisites: To be a Telecom customer To be registered and to have a mobile money account To have deposit The money is deducted from...
  • Graphs in Science…

    Graphs in Science…

    Graphs in Science? By organizing data, a scientist can more easily interpret what has been observed. Since most of the data scientist collect is quantitative, data tables and charts are usually used to organize the information.
  • Template for NCO Planning Meeting - National Oceanic and ...

    Template for NCO Planning Meeting - National Oceanic and ...

    Develop and Enhance numerical guidance Improve NCEP's numerical forecast model systems via: Scientific upgrades Optimization Additional observations Transition operational numerical forecast models from research to operations Transform & integrate Code Algorithms Techniques Manages and executes transition process including technical and...