Show simple item record

dc.contributor.authorHemingway, Jordon D.  Concept link
dc.contributor.authorHilton, Robert G.  Concept link
dc.contributor.authorHovius, Niels  Concept link
dc.contributor.authorEglinton, Timothy I.  Concept link
dc.contributor.authorHaghipour, Negar  Concept link
dc.contributor.authorWacker, Lukas  Concept link
dc.contributor.authorChen, Meng-Chiang  Concept link
dc.contributor.authorGaly, Valier  Concept link
dc.date.accessioned2018-04-24T15:19:05Z
dc.date.available2018-04-24T15:19:05Z
dc.date.issued2018-02-15
dc.identifier.urihttps://hdl.handle.net/1912/10284
dc.descriptionAuthor Posting. © The Author(s), 2018. This is the author's version of the work. It is posted here under a nonexclusive, irrevocable, paid-up, worldwide license granted to WHOI. It is made available for personal use, not for redistribution. The definitive version was published in Science 360 (2018): 209-212, doi:10.1126/science.aao6463.en_US
dc.description.abstractLithospheric organic carbon (“petrogenic”; OCpetro) is oxidized during exhumation and subsequent erosion within mountain ranges. This process is a significant source of CO2 to the atmosphere over geologic timescales, but the mechanisms that govern oxidation rates in mountain landscapes remain poorly constrained. We demonstrate that, on average, 67 ± 11 % of OCpetro initially present in bedrock exhumed from the tropical, rapidly eroding Central Range of Taiwan is oxidized within soils, leading to CO2 emissions of 6.1 – 18.6 t C km-2 yr-1. The molecular and isotopic evolution of bulk OC and lipid biomarkers during soil formation reveals that OCpetro remineralization is microbially mediated. Rapid oxidation in mountain soils drives CO2 emissions fluxes that increase with erosion rate, thereby counteracting CO2 drawdown by silicate weathering and biospheric OC burial.en_US
dc.description.sponsorshipThis research was supported by: the NSF Graduate Research Fellowship Number 2012126152 and the WHOI Ocean Ventures Fund (J.D.H.); European Research Council Starting Grant 678779 ROC-CO2 (R.G.H.); NSF grants OCE-0851015 and OCE-0928582 and WHOI Independent Study Award 27005306 (V.V.G.).en_US
dc.language.isoen_USen_US
dc.relation.urihttps://doi.org/10.1126/science.aao6463
dc.titleMicrobial oxidation of lithospheric organic carbon in rapidly eroding tropical mountain soilsen_US
dc.typePreprinten_US


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record