Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills
Progress Code: completed Statement: Dates provided in temporal coverage are approximate only. From the abstracts of some of the referenced papers: The relationship between surface sediment diatom assemblages and measured limnological variables in 33 coastal Antarctic lakes was examined by constructi...
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Online Access: | https://researchdata.edu.au/palaeoclimate-analysis-sediment-vestfold-hills/2821086 |
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ftands:oai:ands.org.au::2821086 2024-09-15T17:44:23+00:00 Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) MCMINN, ANDREW (collaborator) MCMINN, ANDREW (hasPrincipalInvestigator) MCMINN, ANDREW (author) McMinn, A. and Roberts, D. (originator) ROBERTS, DONNA (collaborator) ROBERTS, DONNA (hasPrincipalInvestigator) Spatial: westlimit=77.86548; southlimit=-68.76214; eastlimit=78.8269; northlimit=-68.37895 Spatial: uplimit=13; downlimit=-28 Spatial: uplimit=60; downlimit=3 Temporal: From 1995-10-01 to 1996-03-31 https://researchdata.edu.au/palaeoclimate-analysis-sediment-vestfold-hills/2821086 unknown Australian Ocean Data Network https://researchdata.edu.au/palaeoclimate-analysis-sediment-vestfold-hills/2821086 ASAC_784 AU/AADC > Australian Antarctic Data Centre, Australia climatologyMeteorologyAtmosphere geoscientificInformation oceans EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS BIOSPHERE > ECOSYSTEMS > FRESHWATER ECOSYSTEMS > LAKE/POND LAKE/POND > SALINE LAKES ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS PROTISTS > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS WATER QUALITY/WATER CHEMISTRY WATER QUALITY/WATER CHEMISTRY > SOLIDS > TOTAL DISSOLVED SOLIDS GASES > DISSOLVED GASES dataset ftands 2024-08-06T01:58:58Z Progress Code: completed Statement: Dates provided in temporal coverage are approximate only. From the abstracts of some of the referenced papers: The relationship between surface sediment diatom assemblages and measured limnological variables in 33 coastal Antarctic lakes was examined by constructing a diatom-water chemistry dataset. Canonical correspondence analysis revealed that salinity and silicate each explain significant amounts of variation in the distribution and abundance of the surface sediment diatom taxa. Salinity has the strongest influence, revealing its value for limnological inference models in this coastal Antarctic region. A comprehensive diatom stratigraphy is used to calculate a palaeosalinity history for an Antarctic lake via an established diatom-salinity transfer function for the Vestfold Hills, Antarctica. A sediment core taken from Ace Lake in 1995 shows three distinct changes in diatom assemblage constituents: initial benthic hyposaline - freshwater taxa are replaced by marine planktonic and sea-ice taxa with these taxa in turn replaced by the benthic hypersaline taxa dominant in the lake today. These changes in assemblage composition enable the lakewater salininty of each stage to be determined, and the Holocene evolution of the lake to be refined. Deglaciation of the Vestfold Hills at the beginning of the Holocene exposed Ace Lake basin; following this, fresh lacustrine diatoms were deposited from ~11 380 to ~8110 corrected 14C yrBP. Relative sea-level rise after this time led to the progressive marine inundation of the lake and the deposition of marine diatom taxa. Marine taxa were dominant in the sediment for more than 6000 years. Isostatic rebound and stabilisation of the sea-level isolated Ace Lake and at ~1480 corrected 14C yrBP saline lacustrine diatoms became the dominant taxa, indicative of the concentration of dissolved salts through evaporation after isolation. Dataset Antarc* Antarctic Antarctica Sea ice Research Data Australia (Australian National Data Service - ANDS) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
climatologyMeteorologyAtmosphere geoscientificInformation oceans EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS BIOSPHERE > ECOSYSTEMS > FRESHWATER ECOSYSTEMS > LAKE/POND LAKE/POND > SALINE LAKES ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS PROTISTS > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS WATER QUALITY/WATER CHEMISTRY WATER QUALITY/WATER CHEMISTRY > SOLIDS > TOTAL DISSOLVED SOLIDS GASES > DISSOLVED GASES |
spellingShingle |
climatologyMeteorologyAtmosphere geoscientificInformation oceans EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS BIOSPHERE > ECOSYSTEMS > FRESHWATER ECOSYSTEMS > LAKE/POND LAKE/POND > SALINE LAKES ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS PROTISTS > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS WATER QUALITY/WATER CHEMISTRY WATER QUALITY/WATER CHEMISTRY > SOLIDS > TOTAL DISSOLVED SOLIDS GASES > DISSOLVED GASES Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
topic_facet |
climatologyMeteorologyAtmosphere geoscientificInformation oceans EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS BIOSPHERE > ECOSYSTEMS > FRESHWATER ECOSYSTEMS > LAKE/POND LAKE/POND > SALINE LAKES ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE > DIATOMS PROTISTS > PALEOCLIMATE > OCEAN/LAKE RECORDS > SEDIMENTS WATER QUALITY/WATER CHEMISTRY WATER QUALITY/WATER CHEMISTRY > SOLIDS > TOTAL DISSOLVED SOLIDS GASES > DISSOLVED GASES |
description |
Progress Code: completed Statement: Dates provided in temporal coverage are approximate only. From the abstracts of some of the referenced papers: The relationship between surface sediment diatom assemblages and measured limnological variables in 33 coastal Antarctic lakes was examined by constructing a diatom-water chemistry dataset. Canonical correspondence analysis revealed that salinity and silicate each explain significant amounts of variation in the distribution and abundance of the surface sediment diatom taxa. Salinity has the strongest influence, revealing its value for limnological inference models in this coastal Antarctic region. A comprehensive diatom stratigraphy is used to calculate a palaeosalinity history for an Antarctic lake via an established diatom-salinity transfer function for the Vestfold Hills, Antarctica. A sediment core taken from Ace Lake in 1995 shows three distinct changes in diatom assemblage constituents: initial benthic hyposaline - freshwater taxa are replaced by marine planktonic and sea-ice taxa with these taxa in turn replaced by the benthic hypersaline taxa dominant in the lake today. These changes in assemblage composition enable the lakewater salininty of each stage to be determined, and the Holocene evolution of the lake to be refined. Deglaciation of the Vestfold Hills at the beginning of the Holocene exposed Ace Lake basin; following this, fresh lacustrine diatoms were deposited from ~11 380 to ~8110 corrected 14C yrBP. Relative sea-level rise after this time led to the progressive marine inundation of the lake and the deposition of marine diatom taxa. Marine taxa were dominant in the sediment for more than 6000 years. Isostatic rebound and stabilisation of the sea-level isolated Ace Lake and at ~1480 corrected 14C yrBP saline lacustrine diatoms became the dominant taxa, indicative of the concentration of dissolved salts through evaporation after isolation. |
author2 |
AADC (owner) AADC, DATA OFFICER (distributor) AADC, DATA OFFICER (custodian) AU/AADC > Australian Antarctic Data Centre, Australia (hasAssociationWith) Australian Antarctic Data Centre (publisher) Australian Antarctic Division (sponsor) MCMINN, ANDREW (collaborator) MCMINN, ANDREW (hasPrincipalInvestigator) MCMINN, ANDREW (author) McMinn, A. and Roberts, D. (originator) ROBERTS, DONNA (collaborator) ROBERTS, DONNA (hasPrincipalInvestigator) |
format |
Dataset |
title |
Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
title_short |
Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
title_full |
Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
title_fullStr |
Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
title_full_unstemmed |
Palaeoclimate Analysis of Sediment Cores from the Fjords and Lakes of the Vestfold Hills |
title_sort |
palaeoclimate analysis of sediment cores from the fjords and lakes of the vestfold hills |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/palaeoclimate-analysis-sediment-vestfold-hills/2821086 |
op_coverage |
Spatial: westlimit=77.86548; southlimit=-68.76214; eastlimit=78.8269; northlimit=-68.37895 Spatial: uplimit=13; downlimit=-28 Spatial: uplimit=60; downlimit=3 Temporal: From 1995-10-01 to 1996-03-31 |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
AU/AADC > Australian Antarctic Data Centre, Australia |
op_relation |
https://researchdata.edu.au/palaeoclimate-analysis-sediment-vestfold-hills/2821086 ASAC_784 |
_version_ |
1810491925445214208 |