Miocene to Recent contourite drifts development in the northern Weddell Sea (Antarctica)

Maldonado, Andrés; Barnolas, Antonio; Bohoyo, Fernando; Escutia, Carlota; Galindo-Zaldı́var, Jesús; Hernández-Molina, Javier; Jabaloy, A.; Lobo, F. J.; Nelson, Claudia; Rodrı́guez-Fernández, Jessica; Somoza, Luı́s; Vázquez, J.T.

doi:10.1016/j.gloplacha.2004.09.013

Cited by 74 publications

(62 citation statements)

References 87 publications

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“…Miocene continental scale ice sheets in Antarctica were also documented in other borehole and seismic reflection data (e.g. Barker et al, 1988;Miller et al, 1990;Zachos et al, 2001;Maldonado et al, 2005Maldonado et al, , 2006Leitchenkov et al, 2008;Escutia et al, 2011).…”

Section: Full Glacial (Fg) Regimementioning

confidence: 53%

“…Maldonado et al, 2005;Uenzelmann-Neben, 2006). Although typical contourite drift structures are not clearly observed in the WS-SS transect seismic data, the seismic profiles are too sparse to exclude their existence in the pre-glacial central Weddell deep-sea units.…”

Section: Pre-glacial (Pg) Regimementioning

confidence: 91%

“…Opening of South Atlantic Ocean complete, (AFR-ANT seperated) 48 Spreading in Weddell Sea now NNE-SSW and Anomaly-T forms 52,54 N-S extention and stretching in front Dronning Maud Land, no seafloor yet 25,48,58 South America (SAM) -southern Africa (AFR) separates from Antarctica (ANT) 25,48,49 Previous seismic reflection studies presented seismostratigraphy models for the southern Scotia Sea (e.g. Maldonado et al, 1998Maldonado et al, , 2003Maldonado et al, , 2005 Fig. 1), the Antarctic Peninsula (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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Section: Full Glacial (Fg) Regimementioning

confidence: 53%

Section: Pre-glacial (Pg) Regimementioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

et al. 2013

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“…Sediment drifts are common within the Neogene stratigraphic interval along the continental slope (Fig. WS-1) in the western Weddell Sea (Michels et al, 2001;Maldonado et al, 2005).…”

Section: Acoustic Stratigraphy Of the Shelf/slope/rise Environment-spmentioning

confidence: 99%

“…WS-3), with grounded ice extending to the shelf edge in the late Miocene (Michels et al, 2001;Michels et al, 2002). A range of contourite drifts formed on the slope and rise in the northwestern Weddell Sea (Michels et al, 2001;Maldonado et al, 2005). Sedimentation rates at ODP Site 693 reached 60 m/m.y.…”

Section: Change From Non-glacial To Glacial Conditionsmentioning

confidence: 99%

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Cooper

Brancolini

Escutia

et al. 2008

Antarctic Climate Evolution

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Impact of Weddell Sea shelf progradation on Antarctic bottom water formation during the Miocene

et al. 2017

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The Weddell Sea is a main location of bottom water formation and, thus, an important component of global ocean circulation. In this study we examine the ocean and climatic responses to a shelf progradation induced by ice sheet advance and glacially transported sediments during the Miocene, using a general circulation model. Our investigations show that relative to a Miocene standard bathymetry, a farther southerly placed shelf break, as reconstructed in a state‐of‐the‐art bathymetry for the Weddell Sea, enables enhanced Antarctic Bottom Water (AABW) formation and gyre transport during the middle Miocene for both relatively high and low atmospheric CO2 concentrations. Furthermore, CO2 sensitivity experiments show that an atmospheric CO2 decline for a setup with the southerly placed shelf break of a new bathymetry has only a minor impact on AABW formation, while the standard setup shows an increase. In combination, these impacts may explain the pronounced deep water formation in the southern high latitudes from the middle Miocene to the late Miocene.

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Miocene to Recent contourite drifts development in the northern Weddell Sea (Antarctica)

Cited by 74 publications

References 87 publications

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Deep-sea pre-glacial to glacial sedimentation in the Weddell Sea and southern Scotia Sea from a cross-basin seismic transect

Chapter 5 Cenozoic Climate History from Seismic Reflection and Drilling Studies on the Antarctic Continental Margin

Impact of Weddell Sea shelf progradation on Antarctic bottom water formation during the Miocene

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