Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/11075
Authors: Burton, Michael. R.* 
Sawyer, G. M.* 
Granieri, Domenico* 
Title: Deep Carbon Emissions from Volcanoes
Issue Date: 2013
Series/Report no.: /75 (2013)
DOI: 10.2138/rmg.2013.75.11
URI: http://hdl.handle.net/2122/11075
Keywords: VOLCANIC CO2
Subject ClassificationVOLCANIC CO2 EMISSIONS IN THE GEOLOGICAL CARBON CYCLE
Abstract: Over long periods of time (~Ma), we may consider the oceans, atmosphere and biosphere as a single exospheric reservoir for CO2. The geological carbon cycle describes the inputs to this exosphere from mantle degassing, metamorphism of subducted carbonates and outputs from weathering of aluminosilicate rocks (Walker et al. 1981). A feedback mechanism relates the weathering rate with the amount of CO2 in the atmosphere via the greenhouse effect (e.g., Wang et al. 1976). An increase in atmospheric CO2 concentrations induces higher temperatures, leading to higher rates of weathering, which draw down atmospheric CO2 concentrations (Berner 1991). Atmospheric CO2 concentrations are therefore stabilized over long timescales by this feedback mechanism (Zeebe and Caldeira 2008). This process may have played a role (Feulner et al. 2012) in stabilizing temperatures on Earth while solar radiation steadily increased due to stellar evolution (Bahcall et al. 2001). In this context the role of CO2 degassing from the Earth is clearly fundamental to the stability of the climate, and therefore to life on Earth. Notwithstanding this importance, the flux of CO2 from the Earth is poorly constrained. The uncertainty in our knowledge of this critical input into the geological carbon cycle led Berner and Lagasa (1989) to state that it is the most vexing problem facing us in understanding that cycle.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
2013_Burton et al_book_chapter.pdf273.68 kBAdobe PDFView/Open
Show full item record

Page view(s)

13
Last Week
1
Last month
2
checked on Nov 15, 2018

Download(s)

5
checked on Nov 15, 2018

Google ScholarTM

Check

Altmetric