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dc.contributor.authorG. Franzen, Larsen_US
dc.contributor.authorCropp, Rogeren_US
dc.date.accessioned2017-05-03T11:37:35Z
dc.date.available2017-05-03T11:37:35Z
dc.date.issued2007en_US
dc.date.modified2011-05-06T06:46:16Z
dc.identifier.issn04353676en_US
dc.identifier.doi10.1111/j.1468-0459.2007.00328.xen_AU
dc.identifier.urihttp://hdl.handle.net/10072/17989
dc.description.abstractCarbon sequestering in peatlands is believed to be a major climate-regulating mechanism throughout the late Phanerozoic. Since plant life first evolved on land, peatlands have been significant carbon sinks, which could explain significant parts of the large variations in atmospheric carbon dioxide observed in various records. The result is peat in different degrees of metamorphosis, i.e. lignite, hard coal and graphite. During phases of extensive glaciations such as the 330-240 Ma Pangea Ice Age, atmospheric carbon dioxide was critically low. This pattern repeats itself during the Pleistocene when carbon dioxide oscillates with an amplitude of c. 200-300 ppmv. This paper suggests that the ice age cycles during the Pleistocene are generated by the interglacial growth of peatlands and the subsequent sequestering of carbon into this terrestrial pool. The final initiation of ice age pulses towards the end of inter-glacials, on the other hand, is attributed to the cyclic influx of cosmic dust to the Earth surface, which in turn regulates cloud formation and the incoming shortwave radiation. These shorter cycles have a frequency of c. 1000-1250 years and might be connected to sunspot or other low frequency solar variations. In a wider context the ice age cycling could be regarded as an interplay between terrestrial life on the high latitudes of the northern hemisphere and the marine subsurface life in the southeast. If the results presented here are correct, the present global warming might just be the early part of a new warm period such as the Bronze Age and the Roman and Medieval Warm periods. This could be caused by entry into another phase of decreasing influx rates of cosmic dust. The increasing concentrations of atmospheric carbon dioxide might have contributed to this warming but, most important of all, it might temporarily have saved us from a new ice age pulse.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent131634 bytes
dc.format.extent1566001 bytes
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherBlackwell Publishing for the Swedish Society for Anthropology and Geographyen_US
dc.publisher.placeOxford, UKen_US
dc.publisher.urihttp://onlinelibrary.wiley.com/journal/10.1111/%28ISSN%291468-0459en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom301en_US
dc.relation.ispartofpageto330en_US
dc.relation.ispartofissue4en_US
dc.relation.ispartofjournalGeografiska Annaleren_US
dc.relation.ispartofvolume89en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchMulti-Disciplinaryen_US
dc.subject.fieldofresearchcode260401en_US
dc.subject.fieldofresearchcode260602en_US
dc.subject.fieldofresearchcode999999en_US
dc.titleThe peatland / ice age hypothesis revised, adding a possible glacial pulse trigger.en_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2007 Blackwell Publishing. This is the author-manuscript version of the paper. Reproduced in accordance with the copyright policy of the publisher. The definitive version is available at www.interscience.wiley.comen_AU
gro.date.issued2007
gro.hasfulltextFull Text


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