Climatic inferences from glacial and palaeoecological evidence at the last glacial termination, southern South America

McCulloch, Robert; Bentley, Michael J.; Purves, Ross S.; Hulton, Nick; Sugden, David E.; Clapperton, Chalmers M.

doi:10.1002/1099-1417(200005)15:4<409::aid-jqs539>3.0.co;2-#

Cited by 324 publications

(259 citation statements)

References 50 publications

(56 reference statements)

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“…4 °C drop in global temperature (Liu et al, 2009). The dominance of locally-transported Nothofagus pollen assemblages (especially Nothofagus lachlaniae) at the EoceneOligocene boundary in CIROS-1 and CRP-3 cores in McMurdo Sound suggests climate at that time was similar to present-day conditions in southern Patagonia (McCulloch et al, 2000;Mildenhall, 1989;Raine and Askin, 2001). Modern analogues suggest these beech species grow in mean summer temperatures of 4-12 °C (Prebble et al, 2006 (Ehrmann et al, 2005).…”

Section: Antarctic Climate Historymentioning

confidence: 95%

The evolution of the subglacial landscape of Antarctica

Jamieson

Sugden

Hulton

2010

Earth and Planetary Science Letters

134

129

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Section: Antarctic Climate Historymentioning

confidence: 95%

The evolution of the subglacial landscape of Antarctica

Jamieson

Sugden

Hulton

2010

Earth and Planetary Science Letters

134

129

View full text Add to dashboard Cite

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“…3a,b). In particular, the Southern Andes (McCulloch et al, 2000), Alaska and the Aleutian Arc (Denton and Hughes, 1981;Yu et al, 2008), the Cascades and Cordillera regions (Denton and Hughes, 1981;Dyke, 2004), Iceland (Licciardi et al, 2007), Western Europe (Boulton et al, 2001), and Eastern Russia (Grosswald, 1998;Bigg et al, 2008) all experienced significant deglaciation and exhibit higher ratios. Conversely, volcanic regions that experienced little ice unloading exhibit low d/g ratios (Fig.…”

Section: Mapping Of Volcanic Activitymentioning

confidence: 98%

“…Mauna Kea in Hawaii experienced deglaciation after 15 ka (Blard et al 2007). South American deglaciation is less well constrained but appears to have proceeded in a series of steps between 17 and 11 ka (McCulloch et al, 2000). Thus, the discrepancy in timing between the initial rise in sea level and increased volcanism may reflect the differing regional histories of deglaciation.…”

Section: A Quantitative Estimate Of Global Rates Of Volcanismmentioning

confidence: 99%

Feedback between deglaciation, volcanism, and atmospheric CO2

Huybers

Langmuir

2009

Earth and Planetary Science Letters

291

268

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“…In contrast to East Antarctica, where intense iceberg calving is related to interglacial stages, maximum iceberg calving rates from Patagonia and the Antarctic Peninsula document the rapid disintegration of marine ice masses during climate amelioration associated with glacial terminations and less pronounced during short-term climate perturbations (Hofrnann 1999;Diekmann et al 2000). Patagonian land records are consistent with these findings and moreover suggest interhemispheric teleconnections with northernhemispheric climate dynamics (Lowell et al 1995;Heusser et al 2000;McCulloch et al 2000).…”

Section: Ice-rafted Detritus (Ird)mentioning

confidence: 99%

Terrigenous Sediment Supply in the Polar to Temperate South Atlantic: Land-Ocean Links of Environmental Changes during the Late Quaternary

Diekmann

Fütterer

Grobe

et al. 2003

The South Atlantic in the Late Quaternary

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Terrigenous sediment parameters in modem sea-bottom samples and sediment cores of the South Atlantic are used to infer variations in detrital sources and modes of terrigenous sediment supply in response to environmental changes through the late Quaternary climate cycles. Massaccumulation rates of terrigenous sediment and fluxes of ice-rafted detritus are discussed in terms of temporal variations in detrital sediment input from land to sea. Grain-size parameters ofterrigenous mud document the intensity of bottom-water circulation, whereas clay-mineral assemblages constrain the sources and marine transport routes of suspended fine-grained particulates, controlled by the modes of sediment input and patterns of ocean circulation. The results suggest low-frequency East Antarctic ice dynamics with dominant lOO-kyr cycles and high rates of Antarctic Bottom Water formation and iceberg discharge during interglacial times. In contrast, the more subpolar ice masses of the Antarctic Peninsula also respond to short-term climate variability with maximum iceberg discharges during glacial terminations related to the rapid disintegration of advanced ice masses. In the northern Scotia Sea, increased sediment supply from southern South America points to extended ice masses in Patagonia during glacial times. In the southeastern South Atlantic, changes in regional ocean circulation are linked to global thermohaline ocean circulation and are in phase with northern-hemispheric processes of ice build-up and associated formation of North Atlantic Deep Water, which decreased during glacial times and permitted a wider extension of southern-source water masses in the study area.

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Climatic inferences from glacial and palaeoecological evidence at the last glacial termination, southern South America

Cited by 324 publications

References 50 publications

The evolution of the subglacial landscape of Antarctica

The evolution of the subglacial landscape of Antarctica

Feedback between deglaciation, volcanism, and atmospheric CO2

Terrigenous Sediment Supply in the Polar to Temperate South Atlantic: Land-Ocean Links of Environmental Changes during the Late Quaternary

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