Sea-surface dynamics and palaeoenvironmental changes in the North Atlantic Ocean (IODP Site U1313) during Marine Isotope Stage 19 inferred from coccolithophore assemblages

Emanuele, Dario; Ferretti, Patrizia; Palumbo, Eliana; Amore, Filomena Ornella

doi:10.1016/j.palaeo.2015.04.014

Cited by 20 publications

(15 citation statements)

References 91 publications

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“…6f; Kulhanek, 2009), reveals higher coccolith accumulation rates during MIS 11 than MIS 12, suggesting that coccolithophore productivity was higher during warmer MIS 11 than during glacial MIS 12. Similar observations based on high coccolith numbers during interglacials were made for the North Atlantic and Norwegian-Greenland Sea (e.g., McIntyre et al, 1972;Henrich and Baumann, 1999;Emanuele et al, 2015).…”

Section: Comparison With Other Productivity Proxiessupporting

confidence: 76%

“…Coccolithophores are the main primary producers in temperate regions of the open ocean (Brand, 1994) producing biogenic calcite (Bolton et al, 2016) and mediating cycling, sequestration and export of organic and inorganic carbon (Rost and Riebesell, 2004;Baumann et al, 2005). Coccoliths, the minute calcite plates that cover coccolithophore cell, are very abundant in seafloor sediments and have been extensively used as paleoenvironmental tracers providing information on paleoceanographic conditions and composition of the overlying photic zone's communities (e.g., Flores et al, 2003;Baumann et al, 2005;Marino et al, 2014;Emanuele et al, 2015;Maiorano et al, 2015). Enhanced coccolithophore calcification during glacials and terminations has been suggested to drive a decrease in the availability of the carbonate ion in the ocean and trigger the deglacial rise in atmospheric carbon dioxide (pCO 2 ) (Rickaby et al, 2010;Omta et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…In well-preserved sediments, coccolithophore productivity has commonly been inferred from the total coccolith abundance (e.g., Emanuele et al, 2015) and the nannofossil accumulation rate (NAR) (e.g., Flores and Sierro, 2007;Cabarcos et al, 2014), but also from the relative abundance of small placoliths and Florisphaera profunda (e.g., Marino et al, 2008). In addition, other primary production indicators, such as alkenones (organic molecules mostly produced by certain species of coccolithophores) are also used (e.g., Villanueva et al, 2001;Emanuele et al, 2015). The accumulation of organic matter, including total organic carbon (TOC) and alkenones, represents the most direct record of general and coccolithophore productivity, respectively (Schoepfer et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene

Cavaleiro

Voelker

Stoll

et al. 2018

Quaternary Science Reviews

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Section: Comparison With Other Productivity Proxiessupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene

Cavaleiro

Voelker

Stoll

et al. 2018

Quaternary Science Reviews

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“…Sea‐level during highstand 19.1 fluctuated on a small scale, as noted above, and this may be related to sea‐surface dynamics in the North Atlantic Ocean. One high‐resolution δ 18 O record from the North Atlantic shows short‐term fluctuations (Ferretti et al ., ), and the coccolithophore assemblage from the same core indicates oscillations of the North Atlantic Current (Emanuele et al ., ). North Atlantic Current oscillation may contribute to short‐term sea‐level changes, ones which low‐resolution records cannot detect.…”

Section: Discussionmentioning

confidence: 99%

Brief sea‐level fall event and centennial to millennial sea‐level variations during Marine Isotope Stage 19 in Osaka Bay, Japan

Maegakiuchi

Hyodo

Kitaba

et al. 2016

J Quaternary Science

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Detailed sea‐level variation was investigated for Marine Isotope Stage (MIS) 19, based on diatom and grain size analyses of a marine sequence in a core of the Osaka Group. Diatom sea‐level proxies represent precession‐related signals correlated with highstands MIS 19.3 and 19.1, and lowstand MIS 19.2. Astronomical tuning shows the marine sequence has a uniform accumulation rate of about 60 cm ka−1. A rapid sea‐level fall event was found in the earliest MIS 19, demonstrated by several independent sea‐level proxies of diatom and grain size. This event began with a rapid sea‐level drop, followed by a gradual recovery, at about 783–782 ka. A maximum abundance of pelagic diatom taxa at a core depth of 402.20 m evidently shows the highest sea‐level peak in MIS 19, supported by many other proxies. Based on the diatom data, sea‐level change across MIS 19.1 is characterized by centennial to millennial fluctuations. The sea‐level fall event began just after the onset of a cooling event previously reported from the same core. Observations of a comparable sea‐level fall signal in many deep‐sea core records suggest the event is global.

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“…Despite the imperfect match in the orbital parameters' configuration, MIS 11 and MIS 1 show a high analogy in terms of the insolation signal with similar values of atmospheric (pre-human activity) CO 2 concentrations (Loutre and Berger, 2000;2003 and references therein). Although attention shifted to other possible analogs during the last years, such as MIS 19 (Pol et al, 2010;Tzedakis et al, 2012;Emanuele et al, 2015;Ferretti et al, 2015), the scientific discussion on MIS 11 is still ongoing (e.g., Candy et al, 2014;Bubenshchikova et al, 2015;Maiorano et al, 2015;Oliveira et al, 2016;Saavedra-Pellitero et al, 2017;Marino et al, 2018). While not often mentioned in this context, other interglacials (i.e., MIS 5e, 9e, 15a, 15e) also show this phasing, but with varying amounts of precessional power and obliquity amplitude (Yin and Berger, 2010).…”

Section: Introductionmentioning

confidence: 99%

Surface-ocean dynamics during eccentricity minima: a comparison between interglacial Marine Isotope Stage (MIS) 1 and MIS 11 on the Iberian Margin

Palumbo¹,

Voelker

Flores

et al. 2019

Global and Planetary Change

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Understanding interglacial climate variability is a key issue in the scientific community. Here we compared records from Marine Isotope Stage (MIS) 11 to those from MIS 1 (Holocene) as they are perceived to be possible analogs. Our study on the Iberian Margin, a key area to investigate surface dynamics in the Atlantic Ocean, incorporates coccolithophore assemblage and alkenone data of core MD03-2699 and their statistical analyses. Evaluating similarities between MIS 11 and MIS 1 depends on the way the two MIS are being aligned, i.e. at the deglaciation or based on the precession signal. During the deglaciation of either MIS 12 or MIS 2, the Iberian Margin was affected by abrupt decreases in SST and in coccolithophores' paleoproductivity caused by the arrival of subpolar surface waters. Just prior to the decline, in both the intervals, the Portugal Current affected the studied site, although a possible difference in upwelling strength is here suggested and related to more intense westerlies during the last glacial than the late MIS 12. Similar surface-ocean dynamics occurred at the onset of both MIS 11 and MIS 1 as indicated by the prevalence of the Iberian Poleward Current and sometimes the Azores Current, although the subtropical waters were more oligotrophic during the MIS 2 deglaciation than the MIS 12 one. Synchronizing our records according to the precession cycles aligns the early-to-mid Holocene with the second, warmer phase of MIS 11c. During both these intervals, the western Iberian Margin was mainly affected by the Iberian Poleward Current that transported more temperate-warm, mesotrophic surface waters during MIS 11c than during the early-to-mid Holocene. During the early to mid-Holocene the Iberian Margin endured incursions of colder surface waters that did not occur during MIS 11c allowing us to hypothesize that the studied site experienced, from a paleoceanographic point of view, a more stable period during MIS 11c than the early Holocene. Finally, spectral analysis suggests the role of full, half and fourth precession components in driving surface-ocean variability during MIS 11 and during the last 24 kyr BP.

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Sea-surface dynamics and palaeoenvironmental changes in the North Atlantic Ocean (IODP Site U1313) during Marine Isotope Stage 19 inferred from coccolithophore assemblages

Cited by 20 publications

References 91 publications

Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene

Insolation forcing of coccolithophore productivity in the North Atlantic during the Middle Pleistocene

Brief sea‐level fall event and centennial to millennial sea‐level variations during Marine Isotope Stage 19 in Osaka Bay, Japan

Surface-ocean dynamics during eccentricity minima: a comparison between interglacial Marine Isotope Stage (MIS) 1 and MIS 11 on the Iberian Margin

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