Paleoclimate history of Galápagos surface waters over the last 135,000yr

Lea, David W.; Pak, Dorothy K.; Belanger, Christina L.; Spero, Howard J.; Hall, M. A.; Shackleton, Nicholas J

doi:10.1016/j.quascirev.2005.11.010

Cited by 175 publications

(158 citation statements)

References 90 publications

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“…The observations agree with the interpretation we have proposed to explain proxy-dependent divergent SST trends over the Holocene, that have been suggested as driven by distinct seasonal influences for insolation changes on the signal ultimately recorded by different planktonic organisms. However, the observations should be confirmed by new highresolution Mg/Ca records derived from marine sediments retrieved at shallower depths and with the high-quality monitoring of calcite dissolution as presented in Lea et al (2006) and in Tachikawa et al (2008).…”

Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 74%

“…Unfortunately, not all studies report foraminiferal weights and explicitly use this information to control a potential impact of dissolution (see e.g. discussion in Lea et al (2006) and Tachikawa et al (2008)) while the calcium carbonate content may also be linked to changes in calcium carbonate productivity itself, so that it remains difficult to assess whether dissolution is a bias that may have affected Mg/Ca-derived SSTs globally or regionally. Alternatively, marine sediment core depth may be another indication for the likelihood of the dissolution effect on Mg/Ca thermometry since it may influence sediment cores deeper than w2000 m.…”

Section: Mg/ca-derived Sst Trends During the Holocenementioning

confidence: 99%

“…The tropical Pacific Mg/Ca-derived SST changes also showed a clear cooling during the Eemian while Holocene SST seemed to be almost constant. In the EEP where dissolution is suspected to modulate some of the observed Mg/Ca-derived SST changes, Eemian SSTs were unlikely to be more extensively affected by dissolution than over the Holocene period, as G. ruber weights and a suite of other proxies for dissolution suggest (Lea et al 2006 Fig. 4.…”

Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 99%

“…4. Sedimentary records of Eemian SST trends (red curves) compared with their corresponding Holocene trends (blue curves) for (a) the Eeastern Equatorial Pacific (Lea et al, 2006), (b) the Western Equatorial Atlantic (Herbert and Schuffert, 2000), (c) the Indonesian archipelago (Visser et al, 2003), and (d) the North Atlantic area (Martrat et al, 2007). Insolation changes are from Laskar, 1990.…”

Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 99%

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Holocene and Eemian sea surface temperature trends as revealed by alkenone and Mg/Ca paleothermometry

Leduc

Schneider

Kim

et al. 2010

Quaternary Science Reviews

386

238

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a b s t r a c tIn this study we review a global set of alkenone-and foraminiferal Mg/Ca-derived sea surface temperatures (SST) records from the Holocene and compare them with a suite of published Eemian SST records based on the same approach. For the Holocene, the alkenone SST records belong to the actualized GHOST database (Kim, J.-H., Schneider R.R., (2004). GHOST global database for alkenone-derived Holocene seasurface temperature records. Available from: http://www.pangaea.de/Projects/GHOST.), while the Mg/ Ca-derived SST database represents a new compilation. The actualized GHOST database not only confirms the SST changes previously described but also documents the Holocene temperature evolution in new oceanic regions such as the Northwestern Atlantic, the eastern equatorial Pacific, and the Southern Ocean. A comparison of Holocene SST records stemming from the two commonly applied paleothermometry methods reveals contrasting -sometimes divergent -SST evolution, particularly at low latitudes where SST records are abundant enough to infer systematic discrepancies at a regional scale. Opposite SST trends at particular locations could be explained by out-of-phase trends in seasonal insolation during the Holocene. This hypothesis assumes that a strong contrast in the ecological responses of coccolithophores and planktonic foraminifera to winter and summer oceanographic conditions is the ultimate reason for seasonal differences in the origin of the temperature signal provided by these organisms. As a simple test for this hypothesis, Eemian SST records are considered because the Holocene and Eemian time periods experienced comparable changes in orbital configurations, but had a higher magnitude in insolation variance during the Eemian. For several regions, SST changes during both interglacials were of a similar sign, but with higher magnitudes during the Eemian as compared to the Holocene. This observation suggests that the ecological mechanism shaping SST trends during the Holocene was comparable during the penultimate interglacial period. Although this ''ecology hypothesis'' fails to explain all of the available results, we argue that any other mechanism would fail to satisfactorily explain the observed SST discrepancies among proxies.

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Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 74%

Section: Mg/ca-derived Sst Trends During the Holocenementioning

confidence: 99%

Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 99%

Section: Evidence From the Penultimate Interglacial Time Periodmentioning

confidence: 99%

See 2 more Smart Citations

Holocene and Eemian sea surface temperature trends as revealed by alkenone and Mg/Ca paleothermometry

Leduc

Schneider

Kim

et al. 2010

Quaternary Science Reviews

386

238

View full text Add to dashboard Cite

show abstract

“…In our at tempt to cover most of the S range in the global oceans and more over to im part a more uni ver sal char ac ter to our anal y sis, in terms of the S ef fect, we use in our com par i son sam ples from the lower sa lin ity In dian (Sadekov et al, 2008(Sadekov et al, , 2009Mohtadi et al, 2009Mohtadi et al, , 2010aMohtadi et al, , b, 2011, Pa cific (Oppo et al, 2005(Oppo et al, , 2009McConnell and Thunell, 2005;Benway et al, 2006;Steinke et al, 2006;Bolton et al, 2011) and At lan tic (Rosenthal and Boyle, 1993;Lea et al, 2000Lea et al, , 2003Lea et al, , 2006Dekens et al, 2002;Anand et al, 2003;Schmidt et al, 2004;Farmer, 2005;Weldeab et al, 2005;New ton et al, 2006;LoDico et al, 2006;Lund and Curry, 2006;Richey et al, 2007Richey et al, , 2009Cléroux et al, 2008;Mathien-Blard and Bassinot, 2009;Steph et al, 2009;Regenberg et al, 2009;Arbuszewski et al, 2010;Haarmann et al, 2011;Martínez-Botí et al, 2011;Friedrich et al, 2012;Antonarakou et al, 2015) oceans, as well as the more sa line Red (Kisakürek et al, 2008;Mathien-Blard and Bassinot, 2009) and Med i ter ra nean seas (Fer gu son et al, 2008;Kontakiotis et al, 2011;Wit et al, 2010;<...>…”

Section: The Salinity Effectmentioning

confidence: 99%

Assessing the reliability of foraminiferal Mg/Ca thermometry by comparing field-samples and culture experiments: a review

Kontakiotis

Mortyn

Antonarakou

et al. 2016

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Comparison of forced ENSO-like hydrological expressions in simulations of the preindustrial and mid-Holocene

Lewis

LeGrande

Schmidt

et al. 2014

J. Geophys. Res. Atmos.

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Using the water isotope-and vapor source distribution (VSD) tracer-enabled Goddard Institute for Space Studies ModelE-R, we examine changing El Niño-Southern Oscillation (ENSO)-like expressions in the hydrological cycle in a suite of model experiments. We apply strong surface temperature anomalies associated with composite observed El Niño and La Niña events as surface boundary conditions to preindustrial and mid-Holocene model experiments in order to investigate ENSO-like expressions in the hydrological cycle under varying boundary conditions. We find distinct simulated hydrological anomalies associated with El Niño-like ("ENSO WARM ") and La Niña-like ("ENSO COOL ") conditions, and the region-specific VSD tracers show hydrological differences across the Pacific basin between El Niño-like and La Niña-like events. The application of ENSO COOL forcings does not produce climatological anomalies that represent the equal but opposite impacts of the ENSO WARM experiment, as the isotopic anomalies associated with ENSO WARM conditions are generally stronger than with ENSO COOL and the spatial patterns of change distinct. Also, when the same ENSO-like surface temperature anomalies are imposed on the mid-Holocene, the hydrological response is muted, relative to the preindustrial. Mid-Holocene changes in moisture sources to the analyzed regions across the Pacific reveal potentially complex relationships between ENSO-like conditions and boundary conditions. Given the complex impacts of ENSO-like conditions on various aspects of the hydrological cycle, we suggest that proxy record insights into paleo-ENSO variability are most likely to be robust when synthesized from a network of many spatially diverse archives, which can account for the potential nonstationarity of ENSO teleconnections under different boundary conditions.

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Paleoclimate history of Galápagos surface waters over the last 135,000yr

Cited by 175 publications

References 90 publications

Holocene and Eemian sea surface temperature trends as revealed by alkenone and Mg/Ca paleothermometry

Holocene and Eemian sea surface temperature trends as revealed by alkenone and Mg/Ca paleothermometry

Assessing the reliability of foraminiferal Mg/Ca thermometry by comparing field-samples and culture experiments: a review

Comparison of forced ENSO-like hydrological expressions in simulations of the preindustrial and mid-Holocene

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