Cenozoic history of Antarctic glaciation and climate from onshore and offshore studies

McKay, Robert; Escutia, Carlota; Santis, Laura De; Donda, Federica; Duncan, Bella; Gohl, Karsten; Gulick, S. P. S.; Hernández‐Molina, F.J.; Hillenbrand, Claus‐Dieter; Hochmuth, Katharina; Kim, Sookwan; Kühn, Gerhard; Larter, Robert D; Leitchenkov, G. L.; Levy, R. H.; Naish, T.; O’Brien, Philip E; Pérez, Lara F.; Shevenell, A.; Williams, T.

doi:10.1016/b978-0-12-819109-5.00008-6

Cited by 10 publications

(8 citation statements)

References 442 publications

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“…Progress on separating deep ocean temperature and ice volume variables, using Mg/Ca (Lear et al, 2000(Lear et al, , 2015 and later using clumped isotope paleothermometry, found warm deep ocean temperatures persist longer than thought, with temperatures of 5°C-10°C recorded across the Oligocene and Miocene (Meckler et al, 2022). Antarctic temperature reconstructions are vital to understand local climate-cryosphere coupling; however, accessing sedimentary archives remains challenging (e.g., McKay et al, 2022). Many previously collected cores can be revisited with newer techniques (Douglas et al, 2014;Feakins et al, 2012;Passchier et al, 2013Passchier et al, , 2017Thompson et al, 2022;Tibbett et al, 2021).…”

Section: Implications For Cenozoic Coolingmentioning

confidence: 99%

“…The oxygen isotope increase observed in deep‐sea sediment (34.2–33.5 Ma) spanning the Eocene‐Oligocene boundary (35.9 Ma) reflects the expansion of ice sheets on Antarctica (Carter et al., 2017; Coxall & Pearson, 2007; Coxall et al., 2005). Evidence for glacial expansion across the Antarctic continent is contained in proximal sedimentary deposits around the margins of the continent (e.g., Levy et al., 2019; McKay et al., 2022; Passchier et al., 2017). In addition, the location of the ice has been reconstructed from evidence that sea level rose around the edges of the continent due to glacial isostatic adjustment, despite the global drop in eustatic sea level (Stocchi et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The Antarctic Peninsula may have been among the last areas of the continent to be fully glaciated, given its lower latitude, providing refugia for vegetation (Anderson et al., 2011). However, temperatures remain less well known because previous ice advances scoured the continent and sedimentary archives around the margins are hard to access (McKay et al., 2022). There have been few applications of direct temperature proxies, for example, clumped isotopes were applied to the carbonates of shallow‐water coastal bivalves of late Eocene age now uplifted on Seymour Island outcrops, east of the Antarctic Peninsula yielding shallow coastal ocean estimates of 11°C–17°C (Douglas et al., 2014).…”

Section: Introductionmentioning

confidence: 99%

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Cenozoic Antarctic Peninsula Temperatures and Glacial Erosion Signals From a Multi‐Proxy Biomarker Study

Tibbett

Warny

Tierney

et al. 2022

Paleoceanog and Paleoclimatol

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Terrestrial climate records for Antarctica, beyond the age limit of ice cores, are restricted to the few unglaciated areas with exposed rock outcrops. Marine sediments on Antarctica's continental shelves contain records of past oceanic and terrestrial environments that can provide important insights into Antarctic climate evolution. The SHALDRIL II (Shallow Drilling on the Antarctic Continental Margin) expedition recovered sedimentary sequences from the eastern side of the Antarctic Peninsula of late Eocene, Oligocene, middle Miocene, and early Pliocene age that provides insights into Cenozoic Antarctic climate and ice sheet development. Here, we use biomarker data to assess atmospheric and oceanic temperatures and glacial reworking from the late Eocene to the early Pliocene. Analyses of hopanes and n‐alkanes indicate increased erosion of mature (thermally altered) soil biomarker components reworked by glacial erosion. Branched glycerol dialkyl glycerol tetraethers from soil bacteria suggest similar air temperatures of 12°C ± 1°C (1σ, n = 46) for months above freezing for Eocene, Oligocene, and Miocene timeslices but much colder (and likely shorter) periods of thaw during the Pliocene (5°C ± 1°C, n = 4) on the Antarctic Peninsula. TEX86‐based (Tetraether index of 86 carbons) sea surface temperature estimates indicate ocean cooling from 7°C ± 3°C (n = 10) in the Miocene to 3°C ± 1°C (n = 3) in the Pliocene, consistent with deep ocean cooling. Resulting temperature records provide useful constraints for ice sheet and climate model simulations seeking to improve understanding of ice sheet response under a range of climate conditions.

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Section: Implications For Cenozoic Coolingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cenozoic Antarctic Peninsula Temperatures and Glacial Erosion Signals From a Multi‐Proxy Biomarker Study

Tibbett

Warny

Tierney

et al. 2022

Paleoceanog and Paleoclimatol

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“…Prydz Bay itself is dominated by a trough-mouth fan that prograded during phases of glacier advance to the shelf break. Like the western Ross Sea, large data sets are available covering all aspects of core analysis from ODP Legs 119 and 188 (Barron et al, 1991;O'Brien et al, 2001) and a convenient summary has been provided by Whitehead et al (2006) and McKay et al (2021).…”

Section: The Prydz Bay Regionmentioning

confidence: 99%

The Eocene-Oligocene boundary climate transition: an Antarctic perspective

Galeotti

Bijl

Brinkuis

et al. 2022

Antarctic Climate Evolution

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“…The Eocene-Oligocene Transition (EOT) spans 34.4 to 33.7 Ma (Coxall & Pearson, 2007;Hutchinson et al, 2021;Katz et al, 2008) and marks the growth of permanent ice sheets on Antarctica (McKay et al, 2022). This transition includes a two-step increase in benthic foraminiferal δ 18 O by 1.2‰ (Westerhold et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Proxy-Model Comparison for the Eocene-Oligocene Transition in Southern High Latitudes

Tibbett

Burls

Hutchinson

et al. 2022

Preprint

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The Eocene-Oligocene Transition (EOT) marks the shift from greenhouse to icehouse conditions at 34 Ma, when a permanent ice sheet developed on Antarctica. Climate modeling studies have recently assessed the drivers of the transition globally. Here we revisit those experiments for a detailed study of the southern high latitudes in comparison to the growing number of mean annual sea surface temperature (SST) and mean air temperature (MAT) proxy reconstructions, allowing us to assess proxy-model temperature agreement and refine estimates for the magnitude of the pCO forcing of the EOT. We compile and update published proxy temperature records on and around Antarctica for the late Eocene (38-34 Ma) and early Oligocene (34-30 Ma). Compiled SST proxies cool by up to 3°C and MAT by up to 4°C between the timeslices. Proxy data were compared to previous climate model simulations representing pre- and post-EOT, typically forced with a halving of pCO. We scaled the model outputs to identify the magnitude of pCO change needed to drive a commensurate change in temperature to best fit the temperature proxies. The multi-model ensemble needs a 30 or 33% decrease in pCO, to best fit MAT or SST proxies respectively, a difference of just 3%. These proxy-model intercomparisons identify pCO as the primary forcing of EOT cooling, with a magnitude (-200 or -243 ppmv) approaching that of the pCO proxies (-150 ppmv). However individual model estimates span -66 to -375 ppmv, thus proxy-model uncertainties are dominated by model divergence.

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Cenozoic history of Antarctic glaciation and climate from onshore and offshore studies

Cited by 10 publications

References 442 publications

Cenozoic Antarctic Peninsula Temperatures and Glacial Erosion Signals From a Multi‐Proxy Biomarker Study

Cenozoic Antarctic Peninsula Temperatures and Glacial Erosion Signals From a Multi‐Proxy Biomarker Study

The Eocene-Oligocene boundary climate transition: an Antarctic perspective

Proxy-Model Comparison for the Eocene-Oligocene Transition in Southern High Latitudes

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