Deep water provenance and dynamics of the (de)glacial Atlantic meridional overturning circulation
作者： Jörg Lippold , Marcus Gutjahr , Patrick Blaser , Emanuel Christner , Maria Luiza de Carvalho Ferreira
DOI: 10.1016/J.EPSL.2016.04.013
关键词:
摘要: Abstract Reconstructing past modes of ocean circulation is an essential task in paleoclimatology and paleoceanography. To this end, we combine two sedimentary proxies, Nd isotopes ( e ) the 231Pa/230Th ratio, both which are not directly involved global carbon cycle, but allow reconstruction water mass provenance provide information about strength overturning circulation, respectively. In study, combined down-core profiles from six Atlantic Ocean sediment cores presented. The data set complemented by available sets literature. From derive a comprehensive picture spatial temporal patterns dynamic changes Meridional Overturning Circulation over ∼25 ka. Our results evidence for consistent pattern glacial/stadial advances Southern Sourced Water along with northward mode all deeper (>3000 m) Atlantic. Results shallower core sites support active cell shoaled Northern during LGM subsequent deglaciation. Furthermore, report short-lived period intensified AMOC early Holocene.
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