Matches in SemOpenAlex for { <https://semopenalex.org/work/W4255854190> ?p ?o ?g. }
Showing items 1 to 80 of
80
with 100 items per page.
- W4255854190 abstract "Abstract. Since the discovery of ice ages in the XIXth century, a central question of climate science has been to understand the respective role of the astronomical forcing and of greenhouse gases, in particular changes in the atmospheric concentration of carbon dioxide. Glacial-interglacial cycles have been shown to be paced by the astronomy with a dominant periodicity of 100 ka over the last million years, and a periodicity of 41 ka between roughly 1 and 3 million years before present (MyrBP). But the role and dynamics of the carbon cycle over the last 4 million years remain poorly understood. In particular, the transition into the Pleistocene about 2.8 MyrBP or the transition towards larger glaciations about 0.8 MyrBP (sometimes refered as the mid-pleistocene transition, or MPT) are not easily explained as direct consequences of the astronomical forcing. Some recent atmospheric CO2 reconstructions suggest slightly higher pCO2 levels before 1 MyrBP and a slow decrease over the last few million years (Bartoli et al., 2011; Seki et al., 2010). But the dynamics and the climatic role of the carbon cycle during the Plio-Pleistocene period remain unclear. Interestingly, the d13C marine records provide some critical information on the evolution of sources and sinks of carbon. In particular, a clear 400-kyr oscillation has been found at many different time periods and appears to be a robust feature of the carbon cycle throughout at least the last 100 Myr (eg. Paillard and Donnadieu, 2014). This oscillation is also visible over the last 4 Myr but its relationship with the eccentricity appears less obvious, with the occurrence of longer cycles at the end of the record, and a periodicity which therefore appears shifted towards 500-kyr (cf. Wang et al., 2004). In the following we present a simple dynamical model that provides an explanation for these carbon cycle variations, and how they relate to the climatic evolution over the last 4 Myr. It also gives an explanation for the lowest pCO2 values observed in the Antarctic ice core around 600–700 kyrBP. More generally, the model predicts a two-step decrease in pCO2 levels associated with the 2.4 Myr modulation of the eccentricity forcing. These two steps occur respectively at the Plio-Pleistocene transition and at the MPT, which strongly suggests that these transitions are astronomicaly forced through the dynamics of the carbon cycle." @default.
- W4255854190 created "2022-05-12" @default.
- W4255854190 creator A5039181593 @default.
- W4255854190 date "2017-01-11" @default.
- W4255854190 modified "2023-09-26" @default.
- W4255854190 title "The Plio-Pleistocene climatic evolution as a consequence of orbital forcing on the carbon cycle" @default.
- W4255854190 doi "https://doi.org/10.5194/cp-2017-3" @default.
- W4255854190 hasPublicationYear "2017" @default.
- W4255854190 type Work @default.
- W4255854190 citedByCount "0" @default.
- W4255854190 crossrefType "posted-content" @default.
- W4255854190 hasAuthorship W4255854190A5039181593 @default.
- W4255854190 hasBestOaLocation W42558541901 @default.
- W4255854190 hasConcept C100970517 @default.
- W4255854190 hasConcept C110872660 @default.
- W4255854190 hasConcept C111368507 @default.
- W4255854190 hasConcept C114990195 @default.
- W4255854190 hasConcept C115343472 @default.
- W4255854190 hasConcept C121332964 @default.
- W4255854190 hasConcept C127313418 @default.
- W4255854190 hasConcept C132651083 @default.
- W4255854190 hasConcept C150484471 @default.
- W4255854190 hasConcept C151730666 @default.
- W4255854190 hasConcept C15739521 @default.
- W4255854190 hasConcept C186240526 @default.
- W4255854190 hasConcept C18903297 @default.
- W4255854190 hasConcept C197115733 @default.
- W4255854190 hasConcept C205649164 @default.
- W4255854190 hasConcept C2776402521 @default.
- W4255854190 hasConcept C39996641 @default.
- W4255854190 hasConcept C44870925 @default.
- W4255854190 hasConcept C49204034 @default.
- W4255854190 hasConcept C53570757 @default.
- W4255854190 hasConcept C6939412 @default.
- W4255854190 hasConcept C81027334 @default.
- W4255854190 hasConcept C86803240 @default.
- W4255854190 hasConceptScore W4255854190C100970517 @default.
- W4255854190 hasConceptScore W4255854190C110872660 @default.
- W4255854190 hasConceptScore W4255854190C111368507 @default.
- W4255854190 hasConceptScore W4255854190C114990195 @default.
- W4255854190 hasConceptScore W4255854190C115343472 @default.
- W4255854190 hasConceptScore W4255854190C121332964 @default.
- W4255854190 hasConceptScore W4255854190C127313418 @default.
- W4255854190 hasConceptScore W4255854190C132651083 @default.
- W4255854190 hasConceptScore W4255854190C150484471 @default.
- W4255854190 hasConceptScore W4255854190C151730666 @default.
- W4255854190 hasConceptScore W4255854190C15739521 @default.
- W4255854190 hasConceptScore W4255854190C186240526 @default.
- W4255854190 hasConceptScore W4255854190C18903297 @default.
- W4255854190 hasConceptScore W4255854190C197115733 @default.
- W4255854190 hasConceptScore W4255854190C205649164 @default.
- W4255854190 hasConceptScore W4255854190C2776402521 @default.
- W4255854190 hasConceptScore W4255854190C39996641 @default.
- W4255854190 hasConceptScore W4255854190C44870925 @default.
- W4255854190 hasConceptScore W4255854190C49204034 @default.
- W4255854190 hasConceptScore W4255854190C53570757 @default.
- W4255854190 hasConceptScore W4255854190C6939412 @default.
- W4255854190 hasConceptScore W4255854190C81027334 @default.
- W4255854190 hasConceptScore W4255854190C86803240 @default.
- W4255854190 hasLocation W42558541901 @default.
- W4255854190 hasLocation W42558541902 @default.
- W4255854190 hasLocation W42558541903 @default.
- W4255854190 hasLocation W42558541904 @default.
- W4255854190 hasLocation W42558541905 @default.
- W4255854190 hasLocation W42558541906 @default.
- W4255854190 hasOpenAccess W4255854190 @default.
- W4255854190 hasPrimaryLocation W42558541901 @default.
- W4255854190 hasRelatedWork W1014808386 @default.
- W4255854190 hasRelatedWork W1989313658 @default.
- W4255854190 hasRelatedWork W1999074275 @default.
- W4255854190 hasRelatedWork W2008205524 @default.
- W4255854190 hasRelatedWork W2009290371 @default.
- W4255854190 hasRelatedWork W2010790778 @default.
- W4255854190 hasRelatedWork W2952472286 @default.
- W4255854190 hasRelatedWork W3166820990 @default.
- W4255854190 hasRelatedWork W4250612575 @default.
- W4255854190 hasRelatedWork W4255854190 @default.
- W4255854190 isParatext "false" @default.
- W4255854190 isRetracted "false" @default.
- W4255854190 workType "article" @default.