Data

Lake Tiobunga, Macquarie Island – 3300 years of geochemical data

Australian Antarctic Data Centre
SAUNDERS, KRYSTYNA
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/kzc3-pe87&rft.title=Lake Tiobunga, Macquarie Island – 3300 years of geochemical data&rft.identifier=10.26179/kzc3-pe87&rft.publisher=Australian Antarctic Data Centre&rft.description=Our understanding of global climate and ability to predict future changes is limited by a lack of long-term (paleoclimate) data from the Southern Hemisphere (SH). Sub-Antarctic islands are the only landmasses between Antarctica and the mid latitudes where terrestrial paleoclimate records exist, making them crucial locations for linking data from the mid and high latitudes. Using lake sediments from sub-Antarctic islands, we will examine how the climate and ecosystems have changed over the last 2000 years. This will contribute vital information to understand SH climate and ecosystem variability. An 84.0 cm sediment core was collected in 2010 from the centre of Lake Tiobunga using a UWITEC gravity corer. The core was scanned using a micro x-ray fluorescent (µ-XRF) core scanner at 0.5 cm resolution and sampled at 0.5 cm increments. The core was dated using 210Pb (ages calculated using the constant flux, constant sedimentation model) and 14C, which showed the age of the core was 3300 cal yr BP. Additional analyses include sulphur isotopes (δ34S) and total sulphur, and ion beam analysis on sections of the core. Fieldwork conducted in March 2010 Analyses conducted between 2015-2020 Spreadsheet details 1. Notes – information on the sediment core and description of each data worksheet 2. Lake_Tiobunga_210Pb_data – 210Pb data for dating the 20th century 3. Lake_Tiobunga_14C_data – 14C data 4. Lake_Tiobunga_ages – ages calculated from the 210Pb and 14C data 5. Lake_Tiobunga_u-XRF_S_isotopes – µ-XRF core scanning and sulphur (total and δ34S) data 6. Lake_Tiobunga_ion_beam_analysis – Ion beam analysis data including errors&rft.creator=SAUNDERS, KRYSTYNA &rft.date=2021&rft.coverage=northlimit=-54.69175; southlimit=-54.70175; westlimit=158.81628; eastLimit=158.82628; projection=WGS84&rft.coverage=northlimit=-54.69175; southlimit=-54.70175; westlimit=158.81628; eastLimit=158.82628; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4156_Lake_Tiobunga when using these data.&rft_subject=geoscientificInformation&rft_subject=inlandWaters&rft_subject=ISOTOPES&rft_subject=EARTH SCIENCE&rft_subject=PALEOCLIMATE&rft_subject=OCEAN/LAKE RECORDS&rft_subject=DATING&rft_subject=LEAD&rft_subject=SULPHUR&rft_subject=SEDIMENT CORERS&rft_subject=XRF > X-Ray Fluorescence Spectrometer&rft_subject=FIELD SURVEYS&rft_subject=LABORATORY&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND > LAKE TIOBUNGA&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4156_Lake_Tiobunga when using these data.

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Brief description

Our understanding of global climate and ability to predict future changes is limited by a lack of long-term (paleoclimate) data from the Southern Hemisphere (SH). Sub-Antarctic islands are the only landmasses between Antarctica and the mid latitudes where terrestrial paleoclimate records exist, making them crucial locations for linking data from the mid and high latitudes. Using lake sediments from sub-Antarctic islands, we will examine how the climate and ecosystems have changed over the last 2000 years. This will contribute vital information to understand SH climate and ecosystem variability.

An 84.0 cm sediment core was collected in 2010 from the centre of Lake Tiobunga using a UWITEC gravity corer. The core was scanned using a micro x-ray fluorescent (µ-XRF) core scanner at 0.5 cm resolution and sampled at 0.5 cm increments. The core was dated using 210Pb (ages calculated using the constant flux, constant sedimentation model) and 14C, which showed the age of the core was 3300 cal yr BP. Additional analyses include sulphur isotopes (δ34S) and total sulphur, and ion beam analysis on sections of the core.

Fieldwork conducted in March 2010
Analyses conducted between 2015-2020

Spreadsheet details
1. Notes – information on the sediment core and description of each data worksheet
2. Lake_Tiobunga_210Pb_data – 210Pb data for dating the 20th century
3. Lake_Tiobunga_14C_data – 14C data
4. Lake_Tiobunga_ages – ages calculated from the 210Pb and 14C data
5. Lake_Tiobunga_u-XRF_S_isotopes – µ-XRF core scanning and sulphur (total and δ34S) data
6. Lake_Tiobunga_ion_beam_analysis – Ion beam analysis data including errors

Issued: 2021-11-11

Data time period: 2010-03-01 to 2020-12-31

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158.82628,-54.69175 158.82628,-54.70175 158.81628,-54.70175 158.81628,-54.69175 158.82628,-54.69175

158.82128,-54.69675

text: northlimit=-54.69175; southlimit=-54.70175; westlimit=158.81628; eastLimit=158.82628; projection=WGS84

Subjects
DATING | EARTH SCIENCE | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | ISOTOPES | LABORATORY | LEAD | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND > LAKE TIOBUNGA | OCEAN/LAKE RECORDS | PALEOCLIMATE | SEDIMENT CORERS | SULPHUR | XRF > X-Ray Fluorescence Spectrometer | geoscientificInformation | inlandWaters |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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