1 / 23

Operational Procedures

Operational Procedures. How can we build consistent, homogeneous, well-documented climate quality data?. 2 nd IBTrACS Workshop. 11 - 13 April 2011. 1. 1 st IBTrACS Workshop: recommendations. The IBTrACS team should… Document BT procedures Work with agencies through a survey

morrison
Download Presentation

Operational Procedures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Operational Procedures • How can we build consistent, homogeneous, well-documented climate quality data? 2nd IBTrACS Workshop 11 - 13 April 2011 1

  2. 1st IBTrACS Workshop: recommendations • The IBTrACS team should… • Document BT procedures • Work with agencies through a survey • Provide all parameters as provided by original agency • Distribute official and unofficial datasets of other TC related data • Archive all ancillary data • Get involved with the IWTC 2nd IBTrACS Workshop 11 - 13 April 2011

  3. 1st IBTrACS Workshop: recommendations • Best tracking agencies should … • Report more parameters and use WMO format • Document current and historic BT practices • Standardize definitions of winds and wind conversions • Rescue and archive documents relevant to BT data • “Best track” throughout life cycle (through ET) • Encourage best track data discussions at IWTC 2nd IBTrACS Workshop 11 - 13 April 2011

  4. Climate Quality Data • The TC community goal for best track data 2nd IBTrACS Workshop 11 - 13 April 2011 5

  5. Climate quality data • historical perspective • trend analysis • process evaluation • model development and calibration • These data have particular characteristics: • High quality • Homogeneity • Continuity • availability of full documentation with respect to their technical characteristics 2nd IBTrACS Workshop 11 - 13 April 2011

  6. Environmental Data Records Climate Data Records • Climate change • No time constraints in production • Allows time for assessment and correction • Uses past and future data to analyze record • Understand and minimize errors • Predict weather • Tight time constraint • Real-time analysis, diagnostics, forecasting • Use past data to inform present decisions 2nd IBTrACS Workshop 11 - 13 April 2011

  7. Question • Is best track data “climate quality data”? • Post-event analyzed operational data Goal • To make best track data “climate quality data” as it is being produced • Avoid the task of re-analysis in future 2nd IBTrACS Workshop 11 - 13 April 2011

  8. IBTrACS Community Survey • An attempt to record historical operational changes and “best tracking” practices • Questions include: • Are best track positions smoothed? If so, how? • Which year did your agency first begin acquiring SSM/I (other microwave imagery)? • What other changes to in situ, radiosondes or remote sensing data affected forecast and best tracking capability? • How was the cyclone maximum sustained wind speed determined? 2nd IBTrACS Workshop 11 - 13 April 2011

  9. Data Sources • What are the impacts of changes in technology on the historical TC record? 2nd IBTrACS Workshop 11 - 13 April 2011 10

  10. Timeline • Survey responses from: • Meteo-France La Réunion • Australian Bureau of Meteorology • National Hurricane Center • US Navy • Year technology became useful • Year changes in procedures were implemented • Other milestones Please add your expert knowledge to the timeline! 2nd IBTrACS Workshop 11 - 13 April 2011

  11. Reconnaissance • Date ranges? • Types of aircraft? • Flight level to ground transformations? • Instrumentation? • Technological improvements? • Documented for the U.S. • A single research flight for Australian BoM • No aircraft data for La Réunion 2nd IBTrACS Workshop 11 - 13 April 2011

  12. Surface Data & Radar • Date ranges? • Types of observing systems? • Marine buoy and automated offshore stations? • Mesonets? • Documented for the U.S. • Still incomplete coverage of tropical shorelines for Australian BoM • Basically no surface or radar for La Réunion 2nd IBTrACS Workshop 11 - 13 April 2011

  13. Remote Sensing • Satellite data acquisition date ranges? • Types of imagery available? • History of Dvorak implementation? • Other pattern recognition algorithms? • Documented for the U.S. • Dvorak implemented differently – BoM Perth/Brisbane/Western Region • Dvorak implemented much later 2nd IBTrACS Workshop 11 - 13 April 2011

  14. TC Intensity • How do operational decisions affect the historical record? 2nd IBTrACS Workshop 11 - 13 April 2011 15

  15. Tracking Procedures • How do discrepancies in the types of systems recorded affect climate analyses? 2nd IBTrACS Workshop 11 - 13 April 2011 17

  16. Position • Tropical cyclone center fixing procedures? • Subtropical systems? • Post-tropical systems? Procedures often inconsistent or change with administrations 2nd IBTrACS Workshop 11 - 13 April 2011

  17. Training • How do different training approaches affect the data being recorded? 2nd IBTrACS Workshop 11 - 13 April 2011 19

  18. New instruments New science New procedures GPS Dropsondes TC Structure Best track of wind radii @ NHC (2004) 2nd IBTrACS Workshop 11 - 13 April 2011 20

  19. Best Track Procedure • How do different approaches to post season reanalysis introduce differences in the climatology? 2nd IBTrACS Workshop 11 - 13 April 2011 21

  20. Document - Compare -Standardize? • Who? • forecaster? other analyst? committee? • What? • systematic review? casual? no review? • When? • after season? after storm? • Time dedicated? • days? weeks? months? • How? • flexibility to deviate from original forecast? • complete? bounded? • track smoothing? interpolation? • Review? • internal? external? • Re-analysis • procedure for approving changes 2nd IBTrACS Workshop 11 - 13 April 2011

  21. IBTrACS Community Survey • An attempt to record historical operational changes and “best tracking” practices • Included in your folder • Write on timeline • Online at • http://www.surveymonkey.com/s/2ndIBTrACS 2nd IBTrACS Workshop 11 - 13 April 2011

More Related