High-resolution sulfur isotopic composition measurements of volcanic sulfate from Toba candidate eruptions preserved in EDML and EDC Antarctic ice cores

Multiple peaks in sulfate concentration in ice cores have been identified as potential candidates for the ~74 ka Toba supereruption. The sulfur isotopic composition of sulfate preserved in two EPICA Antarctic ice cores, EDML and EDC, for 11 of the candidates has been analysed at high temporal resolu...

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Bibliographic Details
Main Authors: Crick, Laura, Burke, Andrea, Hutchison, William, Kohno, Mika, Moore, Kathryn A, Savarino, Joël, Doyle, Emily A, Mahony, Sue H, Kipfstuhl, Sepp, Rae, James W B, Steele, Robert C J, Sparks, R Stephen J, Wolff, Eric W
Format: Dataset
Language:English
Published: PANGAEA 2021
Subjects:
AGE
Antarctica
Calculated
in volcanic fraction
DEPTH
ice/snow
Dome C
EDC
EDML
EDRILL
EPICA
EPICA-Campaigns
EPICA Dome C
EPICA drill
EPICA Dronning Maud Land
DML28C01_00
Eruption
European Project for Ice Coring in Antarctica
Event label
Ice core
ICEDRILL
Ice drill
Ion chromatography
Kohnen Station
Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS)
sulfate
Sulfur isotopes
Type
volcanic
Volcanic fraction
standard deviation
Δ33S
δ34S
Antarctic
Dronning Maud Land
Kohnen
Snow Dome
Antarc*
ice core
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.933271
https://doi.org/10.1594/PANGAEA.933271
Description
Summary:Multiple peaks in sulfate concentration in ice cores have been identified as potential candidates for the ~74 ka Toba supereruption. The sulfur isotopic composition of sulfate preserved in two EPICA Antarctic ice cores, EDML and EDC, for 11 of the candidates has been analysed at high temporal resolution for mass-independent fractionation (MIF) using multi-collector inductively coupled plasma mass spectrometry. S-MIF signals preserved in volcanic sulfate are indicative of stratospheric eruptions due to sulfur aerosols being exposed to ultraviolet radiation when erupted into and above the ozone layer and subsequently undergoing photochemical reactions. Sulfur aerosols in the stratosphere will have longer residence times than those in the troposphere and will scatter incoming solar radiation. This data set includes the eruption, sample type, depths, ages (using the AICC2012 age model), sulfate concentration (determined by ion chromatography) and isotopic composition data (δ34S, δ33S, Δ33S) and their associated errors.

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