1 / 23

A First Look at Volcanic Ash Detection in the GOES-12 Era

A First Look at Volcanic Ash Detection in the GOES-12 Era. Gary P. Ellrod NOAA/NESDIS Office of Research and Applications Camp Springs, MD Anthony J. Schreiner Cooperative Institute for Meteorological Satellite Studies (CIMSS) University of Wisconsin, Madison. Outline.

spiro
Télécharger la présentation

A First Look at Volcanic Ash Detection in the GOES-12 Era

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. A First Look at Volcanic AshDetection in the GOES-12 Era Gary P. Ellrod NOAA/NESDIS Office of Research and Applications Camp Springs, MD Anthony J. Schreiner Cooperative Institute for Meteorological Satellite Studies (CIMSS) University of Wisconsin, Madison AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  2. Outline • Recent changes to GOES Imager • Effects on volcanic ash capability • GOES-12 ash detection algorithm • Soufriere Hills eruptions, July 2003 • Other GOES-12 capabilities • Ash cloud heights using CO2 band • Sulfur Dioxide detection with Sounder AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  3. Activation of GOES-M (12)as Operational East Spacecraft • Occurred as planned on April 1, 2003 • Main changes to GOES-12 Imager: • 12.0mmIR band replaced with8 km resolution 13.3mmband • 6.7mmwater vapor improves to 4 km res. • Only minor changes through GOES-15 (2012) • Resolution of 13.3 mm improves to 4 km AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  4. Study on 12mm Band Loss Impacts Ash can still be detected without 12mm IR Band, but with increased “false alarms” Guagua Pichincha – 5 Oct ’99, 2115 UTC AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  5. Temperature Difference Comparisons (11-13.3 mm) Data from GOES-8 Sounder, 23 Jan 2001 AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  6. MODIS Simulation of GOES-12 Capability 20 December 2000, 0505 UTC

  7. (USGS) GOES-12 Case StudySoufriere Hills Events, 12-15 July 2003 • Soufriere Hills on Montserrat in Eastern Caribbean • Several explosions triggered by massive lava dome collapse • First event tracked via thermal IR only • Subsequent events with multi-spectral IR • Ash clouds to 8-16 km • Dozens of flights cancelled (50 by AA) Soufriere Hills eruption, 13 July 03 (Montserrat Volcano Observatory) AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  8. 15 July 2003 CaseGOES-12 Three Band IR Product

  9. Possible Use of 13.3 mm IR for Volcanic Cloud Height Estimation • “CO2 Analysis Technique” • Estimation of thin cirrus heights with GOES Sounder (Menzel et al 1983) • Imager version uses: • 11 mm Window IR for opaque clouds • 13.3 and 11 mm IR for thin clouds • Washington VAAC evaluation • Compare with wind profile matchups AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  10. GOES-12 Ash Cloud Heights – 14 July 03 14 July 03 / 0845 UTC Cloud Top Product

  11. Maximum Coverage – GOES Cloud Tops GOES-12 Imager -- Cloud Top Pressure

  12. GOES Sounder Capabilities • 18 Infrared Channels + 1 visible band • 7.4 mm water vapor / SO2 channel • 10.7mm“window” IR • 12.0mm“split window” IR • 13.3mmCO2 absorption band • 10 km resolution at nadir • Slow scan rate (50 min CONUS) • Principal uses: temperature and moisture profiling, cloud product & stability images AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  13. VAAC Areas / GOES-East Sounder + Imager Coverage Sounder scan frequencies: Areas 1 & 2 – 1 hr Areas 3 & 4 – 6 hr

  14. Comparisons with GOES-12 Sounder, 15 July 03* Three-band (3.9 mm, 11mm and 13.3 mm) vs Two-Band “Split Window” Imager 3-BandSounder 3-BandSounder 12-11 mm AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  15. Comparisons with GOES-12 Sounder, 14 July 03Three-band (3.9 mm, 11mm and 13.3 mm) vs Two-Band “Split Window” Imager 3-BandSounder 3-BandSounder 12-11 mm AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  16. Upper Level SO2 Detection From Sounder*Using Difference of 7.4 mm and 9.7 or 13.3 mm IR Bands * With Prata (CSIRO), Schreiner & Schmit (CIMSS) AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  17. Summary / Conclusions • Ash cloud detection and tracking from GOES-12 acceptable based on Soufriere Hills events • Ash cloud height estimates based on 13.3 mm band under evaluation • Sulfur Dioxide (SO2) detection also possible from Sounder AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  18. Questions? GOES-12 volcanic ash imagery available on the Web at: http://www.orbit.nesdis.noaa.gov/smcd/opdb/aviation/volc.html http://www.ssd.noaa.gov/VAAC/ AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  19. Eruption on 12 July 2003, 1145 AST AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  20. UW-CIMSS View Angle Effects – GOES-12 Imager IR AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  21. Two Band IR Technique AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

  22. SO2 Absorption Spectra AMS ARAM Conference, Hyannis, MA, 4-8 Oct 2004

More Related