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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 1 PC-HYSPLIT WORKSHOP

HYSPLIT / Volcanic Ash

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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? - PowerPoint PPT Presentation

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Page 1: 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 1PC-HYSPLIT WORKSHOP

Page 2: HYSPLIT / Volcanic Ash

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

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Page 3: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

Where are the volcanoes?

From http://www.volcano.si.edu/world/find_regions.cfm3PC-HYSPLIT WORKSHOP

Page 4: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

A little more detail… (maps not on same scale)

From http://www.volcano.si.edu/world/find_regions.cfm

Alaska

Hawaii

Western US

Mexico, Central America

Northern South America

Marianas

Caribbean Sea

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Page 5: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

What is being done about it?International Civil Aviation Organization (ICAO)• Established a global network of Volcanic Ash Advisory Centers

389 1280

30 492

53

1223

2512

1544

Number of Volcanic Ash Advisories issued during the ~18-month period before the 5th Meetimg of the ICAO IAVWOPSG

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Page 6: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

International Civil Aviation Organization (ICAO)• standards and recommended practices regarding messages/products (following practices for other hazards e.g. turbulence, thunderstorms)

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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

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Page 8: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

Volcanic Ash Advisory Centers• Satellite monitoring• Run transport and dispersion model (HYSPLIT @ NWS)• Issue “Volcanic Ash Advisories”

Research• NOAA, NASA, etc.

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HYSPLIT / Volcanic Ash

Volcanic Ash Advisory

Volcanic Ash Graphic

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Page 10: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

Volcanic Ash Advisory

Volcanic Ash Graphic

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Page 11: HYSPLIT / Volcanic Ash

Source idealization

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

Hcolumn

HYSPLIT / Volcanic Ash

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Page 12: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

Example particle output

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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

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HYSPLIT output in “VAFTAD-format”

HYSPLIT output in “HYSPLIT-format”

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Page 15: HYSPLIT / Volcanic Ash

HYSPLIT / Volcanic Ash

http://ready.arl.noaa.gov/READYVolcAsh.php

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