1 Development of a GOES-R Automated Volcanic Cloud Alert System Michael Pavolonis (NOAA/NESDIS/STAR) Justin Sieglaff (UW-CIMSS) Ron Thomas, Paul Krehbiel,

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Presentation transcript:

1 Development of a GOES-R Automated Volcanic Cloud Alert System Michael Pavolonis (NOAA/NESDIS/STAR) Justin Sieglaff (UW-CIMSS) Ron Thomas, Paul Krehbiel, William Rison (NMT) Tony Hall (NOAA/NWS Anchorage VAAC) Greg Gallina (NOAA/NESDIS Washington VAAC) Marco Fulle -

Development of a GOES-R Automated Volcanic Cloud Alert System Multi-spectral imagery is important for tracking volcanic clouds but the information is qualitative and requires a properly trained human to interpret. The GOES-R volcanic ash and SO 2 products developed by the AWG provide important quantitative information but are not designed to issue alerts to forecasters when a volcanic cloud is sampled by the ABI. Alerts are critical for insuring that the full capabilities of GOES-R are used to help address the 5 minute volcanic ash warning capability required by the aviation industry. The goal of this project is to develop a GOES-R automated alert system that can detect nearly all types of volcanic clouds 1.Ash dominated in portion of cloud observed by passive GOES-R measurements 2.SO 2 dominated in portion of cloud observed by passive GOES-R measurements. 3.Ice topped volcanic clouds

Development of a GOES-R Automated Volcanic Cloud Alert System Using robust spectral predictors (e.g. Pavolonis, 2010), a naïve Bayes classifier is used to determine the probability that a particular cloud object is an ash cloud (same procedure will be used to detect SO 2 clouds). Temporal trends in cloud properties will be used to determine the probability that an ice topped cloud was produced by a volcanic eruption. GLM detected lightning will be used to supplement the alerts (ground-based networks will be used as a proxy for the GLM) and gain insight into cloud microphysics. Automated alerts (to VAAC’s and other interested users) can then be issued for clouds that exceed a user define probability that are near volcanoes of interest. ***The very high accuracy of the volcanic cloud detection scheme developed will be much better suited for data assimilation and model verification work than traditional detection methods and collaborations with modeling groups are underway (e.g. Schmehl et al., 2011).

Results of ash detection are contoured on top of imagery and shown in tandem with baseline GOES-R ash products (ash height, loading, and effective radius) Text report containing quantitative information on cloud location, detection uncertainty, cloud properties, and background environment