Mt. Etna Volcanic Plume from Aster and Hyperion data by Asi-Srv modules C. Spinetti, M.F. Buongiorno, M. Silvestri, S. Zoffoli Istituto Nazionale di Geofisica e Vulcanologia, Italy Agenzia Spaziale Italiana, Italy Picture by Italian Astronauts Nespoli from ISS, Etna

Volcanic emissions in atmosphere Volcanic emissions in atmosphere The Asi-SRV system The Asi-SRV system Volcanic plume measurements modules Volcanic plume measurements modules Test site Mt. Etna Results in test periods Results in test periods Conclusions Conclusions Outline Spinetti et al, IGARSS July 2011

Volcanic emissions in atmosphere Spinetti et al, IGARSS July 2011

Volcanic Plumes components Water Vapour Ranges between % of plume component; Carbonic Gas Every year about 130 millions tons of CO 2 are emitted by volcanoes; Sulfur Dioxide Every year about 1 million tons of SO 2 are emitted by volcanoes; Solid and liquid Particles Solid particles can ranges in size from m to nm (aerosol). Liquid particles are formed by eterogeneous nucleation and condensation of H2SO4 into liquid particles of aerosol Spinetti et al, IGARSS July 2011

ASI-SRV Volcanic Risk System The project philosophy is to implement specific modules which allow to process, store and visualize through Web GIS EO/non EO integrated products in the volcanic activity phases defined within Civil Protection operations: Knowledge and prevention (K&P) Knowledge and prevention (K&P) Crisis (C) Crisis (C) Post Crisis (PC) Post Crisis (PC) Spinetti et al, IGARSS July 2011 Funded by the Italian Space Agency (ASI) with the aims to develop a system for near real time analysis of Earth Observations data for volcanic risk management.

Logical Architecture Products publication Web browser DATA REPOSITORY End user WMS Server Processing chains Scientific Operators Gis desktop EO Raw data Direct download User Level Sources Level Product Archive and validation Non-EOdata Spinetti et al, IGARSS July 2011

ASI - 21/10/2004Studio di fattibilità - Rischio Vulcanico - PRR Frequent monitoring with ground networks used to validate and integrate EO products. Vesuvio Campi Flegrei Sites selection compatible with the spatial resolution of EO operative systems TEST SITES Spinetti et al, IGARSS July 2011 Picture courtesy of B. Benchke Etna Aster 3D

Volcanic plume measurements using EO data: the SRV modules using EO data: the SRV modules EO Data used to S/S Surveillance and Early Warning of eruptions ModulesProductsSatellite - SensorSatellite Revisit Time Map Products spatial resolution VAOT LAOT Aerosol Optical Thickness TERRA ASTER EO-1 HYPERION TERRA AQUA MODIS 16 gg 2 gg 15 m 30 m 1 km WVH2O Content (g/cm2) EO-1 HYPERION16 gg30 m SO2SO2 Flux (Kg/s)FLAME Ground remote sensing network Continuous - SO2SO2 Content (g/m2) ASTER16 gg90 m Spinetti et al, IGARSS July 2011

Processor Data level scheme MODULES Spinetti et al, IGARSS July 2011

Module Logic workflow For each sensor a data series of remote sensed data have been processed By means of specific algorithm and using Auxiliary and Ancillary… …the parameter is obtained Before to post on the GIS each raster needs to be converted in a ESRI like vector.. From raw data to plume parameter Product Vectorfile RTM Simulation Maps Calibration Georeferentiation Surface reflectance Vertical profile Plume altitude Optical particle parameters Convolution with sensor response function Spinetti et al, IGARSS July 2011

Module VAOT (Aerosol optical thickness) and WV (Water Vapour) techniques  VAOT module is based on volcanic aerosol retrieval technique (Spinetti et 2003 and Spinetti and Buongiorno 2007) adapted to analyze Aster and Hyperion. The module output is a map of plume Aerosol Optical 550 nm with medium-high spatial resolution 15m and 30m  WV Module is based on CIBR technique (Carerre and Conel, 1994; Spinetti et al., 2004) using the H2O Hyperion absorption nm in the atmospheric spectrum curve. The module output is a map of columnar content of plume water vapour.  Modules has been developed to be “user-driven”. A huge effort has been done to achive the semi-automatic way in order to produce results easly and in short time. Spinetti et al, IGARSS July 2011

AOT_Hy :34GMT AOT mean AOTmin AOTmax Plume area 2.25km2 Plume direction NE EO1-Hyperion VAOT EO-1 - Hyperion 24 Sept 2001 Module input Spinetti et al, IGARSS July 2011

TERRA-ASTER VAOT TERRA-ASTER 10 May 2010 Module input Module output Classificated min max Spinetti et al, IGARSS July 2011

WV The map on 25 October 2006 shows a plume structure divided in 3 dinstinct areas of high content in the summit corresponding to the 4 summit craters. The map on 9 July 2007 shows a dispersed plume over the summit area without any preferential direction. The map on 8 October 2009 shows a water vapour plume well South directed. WV EO1-Hyperion

Test period Test period EO-1 Hyperion Time series Swath width 7.5 km Time series of total 142 data between acquisition period June 2001 to September Sept 2005 Out of scene GIS Product provided 49 VAOT maps (90% of selected 34% of acquisition) 23 WV maps (46%) Spinetti et al, IGARSS July 2011

TERRA – ASTER Time series Time series of total 262 data between acquisition period data from April 2000 to August 2010 Swath width 60 km GIS Product provided: 32 VAOT maps (69% of selected 12% of acquisition) Spinetti et al, IGARSS July 2011

2001 eruption 2002 – 2003 eruption2004 – 2005 eruption2006 eruption eruption Hyperion Time series VAOT Results

Aster and Hyperion Time series results VAOT gen sett July eruption 16 Sept eruption2004 – 2005 eruption2002 – 2003 eruption 2001 eruption 13 July 01 4 May 00 Impact index AOT max* area

SO2 flux FLAME-DOAS ground network First SO2 measurements by COSPEC on 1970! From 2005 automatic UV-Doas ground network has been developed. station scans Data analysis FLAME-Etna network ENIC ECUR EILI EVEN EMIL Spinetti et al, IGARSS July 2011

(Caltabiano et al., 2011; Salerno et al., 2007) Flame daily average flux SO July Sept 07 4 May 00 WV_Hy Product :32GMT WV mean (g/m2) WV min (g/m2) WV max (g/m2) Plume area 1.25km2 Spinetti et al, IGARSS July 2011

12-13 January 2011 Paroxysm :16 UTC :36 UTC Input : Dati Modis Terra e Aqua Output: 1km

-Modules of the SRV system has been developed in order to be used in near real time for monitoring purpose. -The VAOT and WV provide information on the degassing status of Etna in the early warning risk management phase. -Outup maps with 15 to 30 m of resolution give the AOT and vapour content and the plume structure indicating in some cases which crater is the most active. -The analysis of time series indicates high values of AOT correlated with large plume area during an eruption and before an explosive activity as and 2007 paroxysm. The high values of Aot on a large area indicate aerosol formation that are correlate with high SO2 flux and water vapour. -The satellite revisiting time is critical to monitoring purpose to derive product maps.Conclusions Spinetti et al, IGARSS July 2011

Thank You Etna paroxysm Spinetti et al, IGARSS July 2011