Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach

Aarons, Sarah M.; Aciego, S.; Arendt, Carli A.; Blakowski, Molly A.; Steigmeyer, August; Gabrielli, Paolo; Sierra‐Hernández, M. Roxana; Beaudon, Émilie; Delmonte, Barbara; Baccolo, Giovanni; May, Nathaniel W.; Pratt, Kerri A.

doi:10.1016/j.quascirev.2017.03.011

Cited by 29 publications

(57 citation statements)

References 53 publications

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“…In this work, we observed a clear shift in 87 Sr/ 86 Sr and ε Nd isotope compositions during the MIS 6-MIS 5e transition (Figures 1 and 3a). The MIS 6 dust ranges from 87 Sr/ 86 Sr = 0.707 to 0.708, and from ε Nd = −0.4 to −0.3, similar to that observed during MIS 2 (Aarons et al, 2017) and confirming a South American source for dust deposited during glacial periods (Figure 2a). MIS 5e dust has a different composition, where 87 Sr/ 86 Sr = 0.704 to 0.708, while ε Nd = 1.2 to 3.7.…”

Section: Dust Source Variations On Glacial-interglacial Timescalessupporting

confidence: 72%

“…However, dust provenance during interglacial periods is less clear (Delmonte et al, 2013. During MIS 1, the source of dust to Taylor Glacier likely a mix of older (>100 Ma), local Victoria Land sources with background dust input from SSA (Aarons et al, 2017). Ice-free areas at the current margin of the EAIS also could supply dust, especially at coastal ice core sites where ice-free areas are more common (Talos Dome and Taylor Dome).…”

Section: Sources Of Dust To Antarcticamentioning

confidence: 99%

“…Climate model simulations of MIS 5e suggest that the water isotope response in existing records indicate sea ice retreat rather than WAIS collapse (Holloway et al, 2016). The mineral dust cycle in this region should reflect these changes, as chemical and physical properties of dust particles are influenced by variations in the atmospheric regime and dust source emissions (Aarons et al, 2017;Basile et al, 1997;Delmonte et al, 2008Delmonte et al, , et al, 2004Grousset et al, 1992). The collapse of the WAIS would result in significant environmental changes such as shifts in surface wind directions across West Antarctica and the Ross Sea sector of East Antarctica (Steig et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Dust Transport to the Taylor Glacier, Antarctica, During the Last Interglacial

Aarons

Aciego

McConnell

et al. 2019

Geophysical Research Letters

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Changes in the composition of dust trapped in ice provide evidence of past atmospheric circulation and earth surface conditions. Investigations of dust provenance in Antarctic ice during glacial and interglacial periods indicate that South America is the primary dust source during both climate regimes. Here, we present results from a new ice core dust archive extracted from the Taylor Glacier in coastal East Antarctica during the deglacial transition from Marine Isotope Stage 6 to 5e. Radiogenic strontium and neodymium isotopes indicate that last interglacial dust is young and volcanic, in contrast to the observed preindustrial and Holocene (Marine Isotope Stage 1) dust composition. The dust composition differences from the last interglacial and current interglacial period at the site require a profound difference in atmospheric transport and environmental conditions. We consider several potential causes for enhanced transport of volcanic material to the site, including increased availability of volcanic material and large‐scale atmospheric circulation changes.

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Section: Dust Source Variations On Glacial-interglacial Timescalessupporting

confidence: 72%

Section: Sources Of Dust To Antarcticamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dust Transport to the Taylor Glacier, Antarctica, During the Last Interglacial

Aarons

Aciego

McConnell

et al. 2019

Geophysical Research Letters

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“…Ice cores from this region showed that dust concentration is not the only parameter influenced by climate. It is supported by ice cores from inner and peripheral EAIS (Aarons et al, 2017;Marino et al, 2009), by marine sediments (Weber et al, 2012), and by modeling constraints (Albani, Mahowald, et al, 2012;F. Multiple lines of evidence point to a remote South American source for the dust deposited on EAIS during cold stages.…”

Section: Introductionmentioning

confidence: 83%

Regionalization of the Atmospheric Dust Cycle on the Periphery of the East Antarctic Ice Sheet Since the Last Glacial Maximum

Baccolo

Delmonte

Albani

et al. 2018

Geochem Geophys Geosyst

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Ice cores from inner East Antarctica provided some of the longest and most detailed climatic reconstructions and allowed understanding the relationships between atmospheric mineral dust and climate. In this work we present synchrotron radiation X‐ray Fluorescence geochemical data of dust from the TALDICE ice core drilled at Talos Dome, a peripheral ice dome of East Antarctica (Western Ross Sea). Results highlight a dominant southern South American origin for dust at TALDICE during the Last Glacial Maximum, similarly to other sites located further inland onto the polar plateau. On the contrary, a different scenario concerns Talos Dome during the Holocene if it is compared to more inner sites. The tight connection between high southern latitudes and Antarctica that characterizes cold climate stages becomes weaker since the onset of the last climatic transition and throughout the Holocene. The net effect of this process at Talos Dome is a modification of the atmospheric and environmental settings, owing to local Antarctic sources of Victoria Land to gain importance and become the dominant ones. At the same time in inner East Antarctica the provenance of dust remains remote also during Holocene, revealing an evolution of the homogeneous scenario observed in glacial periods. The enhanced sensitivity of peripheral ice sheet sites to local dust sources makes Talos Dome an ideal site to assess the climatic and atmospheric changes of the peripheral sectors of East Antarctica during the current interglacial period.

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“…Glacier an ideal natural laboratory (Fountain et al, 2014;Petrenko et al, 2017;Baggenstos et al, 2017;Marchant et al, 1994;Aarons et al, 2017).…”

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confidence: 99%

Spatial pattern of accumulation at Taylor Dome during the last glacial inception: stratigraphic constraints from Taylor Glacier

Menking¹,

Brook²,

Shackleton³

et al. 2018

Preprint

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Abstract.A new ice core retrieved from the Taylor Glacier blue ice area contains ice and air spanning the Marine Isotope Stage (MIS) 5/4 transition (74 to 65 ka), a period of global cooling and glacial inception. 25Dating the ice and air bubbles in the new ice core reveals an ice age-gas age difference (Δage) approaching 10 ka during MIS 4, implying very low accumulation at the Taylor Glacier accumulation zone on the northern flank of Taylor Dome. A revised chronology for the Taylor Dome ice core (80 to 55 ka), situated to the south of the Taylor Glacier accumulation zone, shows that Δage did not exceed 2.5 ka at that location. The difference in Δage between the new Taylor Glacier ice core and the Taylor Dome ice core 30 implies a spatial gradient in snow accumulation across Taylor Dome that intensified during the last glacial inception and through MIS 4.

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Dust composition changes from Taylor Glacier (East Antarctica) during the last glacial-interglacial transition: A multi-proxy approach

Cited by 29 publications

References 53 publications

Dust Transport to the Taylor Glacier, Antarctica, During the Last Interglacial

Dust Transport to the Taylor Glacier, Antarctica, During the Last Interglacial

Regionalization of the Atmospheric Dust Cycle on the Periphery of the East Antarctic Ice Sheet Since the Last Glacial Maximum

Spatial pattern of accumulation at Taylor Dome during the last glacial inception: stratigraphic constraints from Taylor Glacier

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