New remote sensing techniques for the detection and quantification of Earth surface CO2 degassing
Tank, Volker and Kick, Hermann and Pfanz, Hardy (2008) New remote sensing techniques for the detection and quantification of Earth surface CO2 degassing. Journal of Volcanology and Geothermal Research, pp. 515-524. Elsevier B. V.. DOI: 10.1016/j.jvolgeores.2008.06.034.
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Official URL: http://dx.doi.org/10.1016/j.jvolgeores.2008.06.034
Earth degassing specifically of carbon dioxide CO2 is of increasing interest with respect to the global carbon budget, related climate effects, earth quake and volcano eruption mechanisms, as well as plant physiological reactions in gas-rich environments. Investigations in all of these disciplines require the detection of surface CO2 degassing structures and quantification of their emissions. We introduce minimal thermal change detection based on infrared imaging as a new remote sensing tool for the detection of earth surface thermal anomalies suiting among others to discover Earth degassing locations of any origin. The method allows for seamless areal search and monitoring of degassing structures in any terrain. As proof of concept infrared imaging measurements were performed at the Bossoleto vent on the eastern master fault of the Siena Graben (Tuskany, Italy). It is known for the migration of a large amount of CO2-rich gas from deep geothermal reservoirs. Field data acquired confirmed the qualification of the method. Detection of CO2 degassing locations from infrared image time series worked reliably and optimal detection conditions were identified (dry, calm, cloudless weather between dusk and dawn). A simple model of heat exchange processes involved and observed was developed. In a first attempt this model was applied to determine the gas exit temperature, the area of gas thermal reach and the gas flux from recorded image series. It is the first method that allows remote areal survey of mofette fields and the associated CO2 flux quantification sole from infrared image time series.
|Title:||New remote sensing techniques for the detection and quantification of Earth surface CO2 degassing|
|Date:||17 August 2008|
|Journal or Publication Title:||Journal of Volcanology and Geothermal Research|
|In Open Access:||Yes|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 515-524|
|Publisher:||Elsevier B. V.|
|Keywords:||soil CO2 efflux, lithospheric degassing, minimal thermal change detection, infrared image, degassing structure detection, mofette|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Vorhaben Spektrometrische Verfahren und Konzepte der Fernerkundung (old)|
|Institutes and Institutions:||Remote Sensing Technology Institute > Experimental Methods|
|Deposited By:||Dr.-Ing. Volker Tank|
|Deposited On:||24 Sep 2008|
|Last Modified:||04 Feb 2013 09:32|
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