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HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash. Who cares about volcanic ash? - aircraft want to AVOID volcanic ash. Pavlof volcano, August 30, 2007 Image Creator: Chris Waythomas; Image courtesy of Alaska Volcano Observatory / U.S. Geological Survey. HYSPLIT / Volcanic Ash. Why?

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HYSPLIT / Volcanic Ash

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  1. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Who cares about volcanic ash? - aircraft want to AVOID volcanic ash Pavlof volcano, August 30, 2007 Image Creator: Chris Waythomas; Image courtesy of Alaska Volcano Observatory / U.S. Geological Survey

  2. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Why? - jet engines have failed in-flight, windows abraded, etc. - safety issue and maintenance issue - cost of avoidance is much less than an inadvertent encounter with ash

  3. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Where are the volcanoes? From http://www.volcano.si.edu/world/find_regions.cfm

  4. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash A little more detail… (maps not on same scale) Alaska Western US Caribbean Sea Hawaii Marianas Mexico, Central America Northern South America From http://www.volcano.si.edu/world/find_regions.cfm

  5. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash What is being done about it? • International Civil Aviation Organization (ICAO) • Established a global network of Volcanic Ash Advisory Centers 0 389 128 Number of Volcanic Ash Advisories issued during the ~18-month period before the 5th Meetimg of the ICAO IAVWOPSG 1223 1544 53 2512 30 492

  6. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash • International Civil Aviation Organization (ICAO) • standards and recommended practices regarding messages/products (following practices for other hazards e.g. turbulence, thunderstorms)

  7. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash • In the U.S., coordination/cooperation • Federal Aviation Administration (FAA) • US Geological Survey (USGS) • NOAA (NWS, NESDIS, OAR) • US Air Force • NASA • Smithsonian Institution

  8. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash • Volcanic Ash Advisory Centers • Satellite monitoring • Run transport and dispersion model (HYSPLIT @ NWS) • Issue “Volcanic Ash Advisories” • Research • NOAA, NASA, etc.

  9. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Volcanic Ash Advisory Volcanic Ash Graphic

  10. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Volcanic Ash Advisory Volcanic Ash Graphic

  11. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Hcolumn • Source description • ash particles of all sizes are uniformly distributed through the eruption column • ash column represented as a vertical line source • ash particle distribution (~0.3 to ~30 μ) represented by 4 particle size bins Hsummit Source idealization

  12. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash Example particle output

  13. PC-HYSPLIT WORKSHOP • HYSPLIT output in “VAFTAD-format” • “visual” ash is shown • default visual ash contour (1.0 unit source) defined based on several historical eruptions • actual visual ash contour chosen by forecaster

  14. PC-HYSPLIT WORKSHOP • HYSPLIT output in “VAFTAD-format” • HYSPLIT output in “HYSPLIT-format”

  15. PC-HYSPLIT WORKSHOP HYSPLIT / Volcanic Ash http://ready.arl.noaa.gov/READYVolcAsh.php

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