Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4354
Authors: Pugnaghi, S.* 
Gangale, G.* 
Corradini, S.* 
Buongiorno, M. F.* 
Title: Mt. Etna sulfur dioxide flux monitoring using ASTER-TIR data and atmospheric observations.
Issue Date: 1-Apr-2006
Series/Report no.: 1-2/152 (2006)
DOI: 10.1016/j.jvolgeores.2005.10.004
URI: http://hdl.handle.net/2122/4354
Keywords: Mt. Etna volcano
sulfur dioxide
ASTER
radiative transfer
TIR
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.07. Volcanic effects 
Abstract: This work is aimed at estimating the sulfur dioxide emission of Mt. Etna volcano (Sicily, Italy) using the thermal infrared images remotely sensed by the Advanced Spacebome Thermal Emission and Reflection Radiometer (ASTER). A new procedure (named FUN) is presented based on approximating functions which represent the atmospheric terms of the radiative transfer equation: transmittance, up-welling and down-welling radiances. The parameters of the approximating functions have been computed through the MODTRAN simulations performed using atmospheric monthly mean profiles measured at Trapani (1989-2003). Trapani (WMO station 16429) is located at the western tip of Sicily and is the closest station to Mt. Etna volcano. With these functions MODTRAN is no longer necessary to compute the SO2 abundance in the plume emitted from Mt. Etna and seen by ASTER. Only an atmospheric radiosounding and a digital elevation model (DEM) registered to the ASTER image are required. This new procedure is compared with the known look-up tables (LUT) procedure proposed by other authors. An interesting aspect of the FUN procedure derives from its combined use with a split window (SW) algorithm. In this case only radiosounding is required to compute the SO2 map. The FUN procedure presented in this paper is a rapid, simple and accurate means of generating SO2 map estimates from the ASTER view of Mt. Etna. The proposed scheme can easily be adapted to another sensor and another volcano. In this paper the results from two ASTER images, 19 July 2003 and 29 July 2001, are presented. In July 2003, a ground truth campaign was deployed, SO2 emission was very low (10-25 kg s(-1); Etna baseline is about 50 kg s(-1)). In July 2001, Mt. Etna erupted and a strong SO2 emission (about 140 kg s(-1)) was measured.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Pugnaghi_JVGR_2006.pdf924.02 kBAdobe PDFView/Open
Show full item record

Page view(s)

235
Last Week
1
Last month
4
checked on Aug 18, 2018

Download(s)

26
checked on Aug 18, 2018

Google ScholarTM

Check

Altmetric