Controls on shell Mg/Ca and Sr/Ca in cultured planktonic foraminiferan, Globigerinoides ruber (white)

Kısakürek, Başak; Eisenhauer, Anton; Böhm, Florian; Garbe‐Schönberg, Dieter; Erez, Jonathan

doi:10.1016/j.epsl.2008.06.026

Cited by 240 publications

(379 citation statements)

References 66 publications

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“…Mg/Ca ratios in the tests of G. sacculifer and Globigerinoides ruber (white) (Kısakürek et al, 2008) show similar values ( Fig. 2A).…”

Section: Resultssupporting

confidence: 65%

“…3D and E and 4B). In contrast, existing calibrations by Lea et al (1999) and Kısakürek et al (2008) showed that in cultured O. universa and G. ruber (white) Sr incorporation increases more rapidly with salinity changes (Fig. 4B).…”

Section: Effect Of Salinity On Mg/ca and Sr/ca Ratiosmentioning

confidence: 76%

“…Accurate temperature reconstructions, therefore, rely on an understanding of these additional factors that can potentially influence the incorporation of Mg and Sr in foraminiferal calcite. Through culture experiments salinity showed to exert a small but consistent influence on foraminiferal Mg/Ca ratios (Nürnberg et al, 1996a;Lea et al, 1999;Kısakürek et al, 2008). More recently, Ferguson etal.…”

Section: Introductionmentioning

confidence: 98%

“…Since both salinity and TA are conservative parameters, by increasing salinity, carbonate parameters, such as total alkalinity (TA), dissolved inorganic carbon (DIC) and [CO 3 2− ] also increase. Seawater carbonate ion concentration [CO 3 2− ] has an effect on planktonic and benthic foraminiferal Mg/Ca and Sr/Ca ratios as well (Russell et al, 2004;Mortyn et al, 2005;Elderfield et al, 2006;Rosenthal et al, 2006;Kısakürek et al, 2008;Rathmann and Kuhnert, 2008;Yu and Elderfield, 2008;Raitzsch et al, 2008). When [CO 3 2− ] of the seawater changes, the calcium carbonate saturation state of seawater (Ω) also changes since Ω = [Ca 2+ ] ⁎ [CO 3…”

Section: Introductionmentioning

confidence: 99%

“…The incorporation of Sr into foraminiferal calcite may also show temperature dependence Reichart et al, 2003;Mortyn et al, 2005). However other parameters might also be involved in the control of foraminiferal Mg/Ca and Sr/Ca ratios namely pressure (Elderfield et al, 1996), calcite saturation (Lea, 1999), carbonate ion concentration ([CO 3 2− ]) (Mortyn et al, 2005;Rosenthal et al, 2006;Hendry et al, 2009), ontogeny (Ni et al, 2007) and growth rate (Kısakürek et al, 2008). Accurate temperature reconstructions, therefore, rely on an understanding of these additional factors that can potentially influence the incorporation of Mg and Sr in foraminiferal calcite.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Dueñas-Bohórquez

Rocha

Kuroyanagi

et al. 2009

Marine Micropaleontology

100

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“…Mg/Ca ratios in the tests of G. sacculifer and Globigerinoides ruber (white) (Kısakürek et al, 2008) show similar values ( Fig. 2A).…”

Section: Resultssupporting

confidence: 65%

Section: Effect Of Salinity On Mg/ca and Sr/ca Ratiosmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Dueñas-Bohórquez

Rocha

Kuroyanagi

et al. 2009

Marine Micropaleontology

100

View full text Add to dashboard Cite

Assessing millennial-scale variability during the Holocene: A perspective from the western tropical Pacific

2014

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We investigate the relationship between tropical Pacific and Southern Ocean variability during the Holocene using the stable oxygen isotope and magnesium/calcium records of cooccurring planktonic and benthic foraminifera from a marine sediment core collected in the western equatorial Pacific. The planktonic record exhibits millennial-scale sea surface temperature (SST) oscillations over the Holocene of~0.5°C while the benthic δ 18 O c document~0.10‰ millennial-scale changes of Upper Circumpolar Deep Water (UCDW), a water mass which outcrops in the Southern Ocean. Solar forcing as an explanation for millennial-scale SST variability requires (1) a large climate sensitivity and (2) a long 400 year delayed response, suggesting that if solar forcing is the cause of the variability, it would need to be considerably amplified by processes within the climate system at least at the core location. We also explore the possibility that SST variability arose from volcanic forcing using a simple red noise model. Our best estimates of volcanic forcing falls short of reproducing the amplitude of observed SST variations although it produces power at low-frequency similar to that observed in the MD81 record. Although we cannot totally discount the volcanic and solar forcing hypotheses, we are left to consider that the most plausible source for Holocene millennial-scale variability lies within the climate system itself. In particular, UCDW variability coincided with deep North Atlantic changes, indicating a role for the deep ocean in Holocene millennial-scale variability.

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Holocene tropical western Indian Ocean sea surface temperatures in covariation with climatic changes in the Indonesian region

et al. 2014

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The sea surface temperature (SST) of the tropical Indian Ocean is a major component of global climate teleconnections. While the Holocene SST history is documented for regions affected by the Indian and Arabian monsoons, data from the near-equatorial western Indian Ocean are sparse. Reconstructing past zonal and meridional SST gradients requires additional information on past temperatures from the western boundary current region. We present a unique record of Holocene SST and thermocline depth variations in the tropical western Indian Ocean as documented in foraminiferal Mg/Ca ratios and δ 18 O from a sediment core off northern Tanzania. For Mg/Ca and thermocline δ 18 O, most variance is concentrated in the centennial to bicentennial periodicity band. On the millennial time scale, an early to mid-Holocene (~7.8-5.6 ka) warm phase is followed by a temperature drop by up to 2°C, leading to a mid-Holocene cool interval (5.6-4.2 ka). The shift is accompanied by an initial reduction in the difference between surface and thermocline foraminiferal δ 18 O, consistent with the thickening of the mixed layer and suggestions of a strengthened Walker circulation. However, we cannot confirm the expected enhanced zonal SST gradient, as the cooling of similar magnitude had previously been found in SSTs from the upwelling region off Sumatra and in Flores air temperatures. The SST pattern probably reflects the tropical Indian Ocean expression of a large-scale climate anomaly rather than a positive Indian Ocean Dipole-like mean state.

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Controls on shell Mg/Ca and Sr/Ca in cultured planktonic foraminiferan, Globigerinoides ruber (white)

Cited by 240 publications

References 66 publications

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Effect of salinity and seawater calcite saturation state on Mg and Sr incorporation in cultured planktonic foraminifera

Assessing millennial-scale variability during the Holocene: A perspective from the western tropical Pacific

Holocene tropical western Indian Ocean sea surface temperatures in covariation with climatic changes in the Indonesian region

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