jason-1 quikscat principal investigator gary lagerloef earth and space research, seattle noaa/nesdis...
TRANSCRIPT
Jason-1
QuikScat
Principal InvestigatorGary Lagerloef
Earth and Space Research, Seattle
Principal InvestigatorGary Lagerloef
Earth and Space Research, Seattle
NOAA/NESDIS Pilot Project: An Operational Data Center for Satellite-Derived Surface Currents in the Tropical Pacific
National Oceanographic Partnerships Program (NOPP)
A Presentation for the Regional Workshop
Potential Applications of Ocean Observations for the Pacific Islands
Fiji, 4-7 October 2002
Jason-1
QuikScatAn Example of Recent Data;
Spatially Smooth Field for Early September 2002
Jason-1
QuikScat The Project Organization
Jason-1 Altimeter IGDR data
Jason-1 Altimeter IGDR data
University of South FloridaGary Mitchum
IGDR Processing toGridded Surface Topography
University of South FloridaGary Mitchum
IGDR Processing toGridded Surface Topography
Real Time QuikScat/SeaWindsVector wind data
Real Time QuikScat/SeaWindsVector wind data
Florida State UniversityMark Bourassa
Daily Gridded Vector Winds
Florida State UniversityMark Bourassa
Daily Gridded Vector Winds
Earth & Space ResearchGary Lagerloef
Principal InvestigatorSurface Current Vectors
Ground Calibration and Error Analysis
Earth & Space ResearchGary Lagerloef
Principal InvestigatorSurface Current Vectors
Ground Calibration and Error Analysis
NOAA/NESDIS Program ManagerBob Cheney
NOAA/NESDIS Program ManagerBob Cheney
Fabrice Bonjean (ESR) Surface current model development; John Gunn (ESR) Data system;
Eric Johnson (ESR) Error analysis; Nancy Soreide (NOAA/PMEL) WWW Site Development;
Laury Miller (NOAA/NESDIS) ENSO monitoring; Yan Xue (NOAANCEP) ENSO monitoring;
Vern Kousky (NOAA/NCEP) ENSO monitoring; Richard Legeckis (NOAA/NESDIS) Instability waves;
Jeff Polovina (NOAA/NMFS) Fisheries; Gregg Jacobs (NRL) Navy model assimilation comparisons;
Fabrice Bonjean (ESR) Surface current model development; John Gunn (ESR) Data system;
Eric Johnson (ESR) Error analysis; Nancy Soreide (NOAA/PMEL) WWW Site Development;
Laury Miller (NOAA/NESDIS) ENSO monitoring; Yan Xue (NOAANCEP) ENSO monitoring;
Vern Kousky (NOAA/NCEP) ENSO monitoring; Richard Legeckis (NOAA/NESDIS) Instability waves;
Jeff Polovina (NOAA/NMFS) Fisheries; Gregg Jacobs (NRL) Navy model assimilation comparisons;
Jason-1
QuikScatA Dynamic Model1 uses Satellite Sea Level and
Vector Wind Measurements to Compute Tropical Surface Currents on and off the Equator
Jason-1 Altimeter sea level deviations (These are added to the mean Levitus dynamic height, which is not shown here).
QuikScat Scatterometer vector wind
Model current averaged over the top 30 m. (July 2002)
1Bonjean, F., and G.S.E. Lagerloef, 2002: Diagnostic model and analysis of the surface currents in the tropical Pacific Ocean, Journal of Physical Oceanography, 32, 2938-2954.
1Bonjean, F., and G.S.E. Lagerloef, 2002: Diagnostic model and analysis of the surface currents in the tropical Pacific Ocean, Journal of Physical Oceanography, 32, 2938-2954.
Jason-1
QuikScat The Currents are Validated with Drifter Data
Data comparison East-west equatorial current: Mean difference = 10 cm/s (0.2 Kt) RMS difference = 25 cm/s (0.5 Kt) Correlation = 0.82
Data comparison East-west equatorial current: Mean difference = 10 cm/s (0.2 Kt) RMS difference = 25 cm/s (0.5 Kt) Correlation = 0.82
Jason-1
QuikScatA Primary Application is Monitoring the Progress
of El Niño – La Niña
Monthly mean and anomaly maps like this have appeared since January 2001 in the NOAA Climate Diagnostics Bulletin.
This recent example (August 2002) shows strong eastward anomalies that usually coincide with El Niño.
(Anomalies are the difference between the monthly current and the seasonal mean.)
Monthly mean and anomaly maps like this have appeared since January 2001 in the NOAA Climate Diagnostics Bulletin.
This recent example (August 2002) shows strong eastward anomalies that usually coincide with El Niño.
(Anomalies are the difference between the monthly current and the seasonal mean.)
Jason-1
QuikScat The Present El Niño Flow is Intensifying
The sequence from July, August and early September is shown with the current anomalies on top of SST anomalies.
The eastward flow has grown steadily in the western half of the equatorial Pacific. (Vectors are horizontally smoothed to remove eddies).
The sequence from July, August and early September is shown with the current anomalies on top of SST anomalies.
The eastward flow has grown steadily in the western half of the equatorial Pacific. (Vectors are horizontally smoothed to remove eddies).
Jason-1
QuikScat Internet Access is Now Online
Home Pagehttp://www.oscar.noaa.gov/
Home Pagehttp://www.oscar.noaa.gov/
The most recent 10-day average data are displayed on the home page.
The most recent 10-day average data are displayed on the home page.
The data are updated 3 times per month, within 10 days of satellite observations.
The data are updated 3 times per month, within 10 days of satellite observations.
Jason-1
QuikScat Click on Data Display
The Data Display link will give you various options to plot surface current maps in any sub-area of the tropical Pacific between latitudes 35oN and 35oS.
The web site is presently being developed and
tested. We welcome your comments for improving the latest online version.
The Data Display link will give you various options to plot surface current maps in any sub-area of the tropical Pacific between latitudes 35oN and 35oS.
The web site is presently being developed and
tested. We welcome your comments for improving the latest online version.
Jason-1
QuikScat Choose Display OptionsVector or scalar options
Date (1993-present)
Use mouse to select boxOr
Enter Latitude/Longitude range
Select spatial filter, color, scaling, and plot density
Click “Generate Plot”
Vector or scalar options
Date (1993-present)
Use mouse to select boxOr
Enter Latitude/Longitude range
Select spatial filter, color, scaling, and plot density
Click “Generate Plot”
Jason-1
QuikScatSample for the SW Equatorial Pacific
Top image is the 10-day mean for 6 Sep 2002.
Bottom is the anomaly from seasonal mean.
This is unfiltered to better show eddies and current features (no horizontal averaging).
1ox1o maximum resolution
The strongest currents are on the equator.
Top image is the 10-day mean for 6 Sep 2002.
Bottom is the anomaly from seasonal mean.
This is unfiltered to better show eddies and current features (no horizontal averaging).
1ox1o maximum resolution
The strongest currents are on the equator.
Fiji
Jason-1
QuikScatA Closer View Around Fiji
This close-up near Fiji is recent data for early September 2002.
Colors represent current speed.
Vectors indicate speed and direction.
Note: The accuracy of the data and vector plots is still being evaluated, and caution is advised.
This close-up near Fiji is recent data for early September 2002.
Colors represent current speed.
Vectors indicate speed and direction.
Note: The accuracy of the data and vector plots is still being evaluated, and caution is advised.
Jason-1
QuikScat Topics for Discussion
1. How would you use the surface current data?• Shipping?• Search and Rescue?• Research?• Fishing?• Pollution monitoring?
2. How can we improve the presentation and delivery of this information?
3. Other suggestions and comments for OSCAR .
You can use the web site to email your comments to [email protected]
1. How would you use the surface current data?• Shipping?• Search and Rescue?• Research?• Fishing?• Pollution monitoring?
2. How can we improve the presentation and delivery of this information?
3. Other suggestions and comments for OSCAR .
You can use the web site to email your comments to [email protected] Thank you