Computer Science
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007e%26psl.258..345c&link_type=abstract
Earth and Planetary Science Letters, Volume 258, Issue 1-2, p. 345-357.
Computer Science
3
Scientific paper
The biogeochemical carbon cycle, which plays an undeniable role in global climate change, is defined both by the size of carbon reservoirs (such as the atmosphere, biomass, soil and bedrock) and the exchange between them of various mineral and organic carbon forms. Among these carbon forms, fossil organic carbon (FOC) (i.e., the ancient organic matter stored in sedimentary rocks) is widely observed in modern environments but is not included in the supergene carbon budget. Using a digitized map of the world and an existing model of CO2 consumption associated with rock weathering, we establish the global distribution of FOC stored in the first meter of sedimentary rocks and a first estimation of annual FOC delivery to the modern environment resulting from chemical weathering of these rocks. Results are given for the world's 40 major river basins and extended to the entire continental surface. With a mean value of 1100 109 t, mainly controlled by shale distribution, the global FOC stock is significant and comparable to that of soil organic carbon (1500 109 t). The annual chemical delivery of FOC, estimated at 43 106 t yr- 1 and controlled by the areal distribution of shales and runoff, is of the same order of magnitude as the FOC output flux to oceans. Chemical weathering of bedrock within the Amazon basin produces one-quarter of the total global flux of FOC derived from chemical weathering, and thus is expected to govern FOC release on a global scale. These results raise important questions concerning the role of FOC in the modern carbon cycle as well as the origin and the budget of carbon in soils and rivers.
Amiotte-Suchet Philippe
Copard Yoann
di-Giovanni Christian
No associations
LandOfFree
Storage and release of fossil organic carbon related to weathering of sedimentary rocks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Storage and release of fossil organic carbon related to weathering of sedimentary rocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Storage and release of fossil organic carbon related to weathering of sedimentary rocks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-878758