Trace Element Chemistry of Antarctic Saline Lakes and Fjords
Dates provided in temporal coverage are approximate only. From the referenced paper: The frigid concentration or freezing of seawater is an important natural phenomenon in the polar regions and results in the precipitation of a different sequence of salts - and thus produces brines of different comp...
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Online Access: | https://researchdata.ands.org.au/trace-element-chemistry-lakes-fjords/685983 https://data.aad.gov.au/metadata/records/ASAC_568 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=568 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1597 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_568 |
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ftands:oai:ands.org.au::685983 2023-05-15T13:46:55+02:00 Trace Element Chemistry of Antarctic Saline Lakes and Fjords AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-68.0; southlimit=-69.0; westlimit=78.0; eastLimit=79.0 Temporal: From 1992-10-01 to 1995-03-31 https://researchdata.ands.org.au/trace-element-chemistry-lakes-fjords/685983 https://data.aad.gov.au/metadata/records/ASAC_568 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=568 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1597 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_568 unknown Australian Ocean Data Network https://researchdata.ands.org.au/trace-element-chemistry-lakes-fjords/685983 e59ffdec-d36b-4736-8b10-9ef25d17b6c2 https://data.aad.gov.au/metadata/records/ASAC_568 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=568 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1597 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_568 https://data.aad.gov.au geoscientificInformation inlandWaters oceans LAKE ICE EARTH SCIENCE TERRESTRIAL HYDROSPHERE SNOW/ICE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS SALINE LAKES BIOSPHERE AQUATIC ECOSYSTEMS LAKES ANTARCTIC ANTARCTICA SEA WATER VESTFOLD HILLS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR dataset ftands 2020-01-05T21:06:52Z Dates provided in temporal coverage are approximate only. From the referenced paper: The frigid concentration or freezing of seawater is an important natural phenomenon in the polar regions and results in the precipitation of a different sequence of salts - and thus produces brines of different composition - to that formed during isothermal evaporation under temperate conditions (about 20-25 degrees C). Seawater freezing, however, has been studied less extensively than evaporation and somewhat greater uncertainty exists over the exact nature of the compositional pathway followed. Most investigators have shown that the precipitation of mirabilite (Na2SO4 - 10 H2O) or gypsum (CaSO4 - 2 H2O), which both occur at the same seawater concentration factor (SWCF), is the critical difference between frigid and evaporative concentration, respectively, a consequence of the very different temperature dependence of the solubilities of these salts, as well as the effect of sodium chloride on these properties. This difference can be considered to represent a temperature-dependent chemical divide in the closed-basin concentration of seawater because it determines significantly the major ion composition of the brine and the salt mineral assemblage precipitated on further evolution of the system. Recently new insights into seawater freezing have been achieved through improvements in existing chemical equilibrium models. Along with the results of some associated experimental work, this has provided evidence for the formation of gypsum during freezing, contradicting the accepted Ringer-Nelson-Thompson model of frigid concentration firmly established in the 1950's and through subsequent studies, but validating an alternative model proposed by Gitterman two decades later. Dataset Antarc* Antarctic Antarctica Research Data Australia (Australian National Data Service - ANDS) Antarctic Ringer ENVELOPE(162.050,162.050,-77.250,-77.250) Vestfold Vestfold Hills ENVELOPE(78.0,79.0,-68.0,-69.0) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation inlandWaters oceans LAKE ICE EARTH SCIENCE TERRESTRIAL HYDROSPHERE SNOW/ICE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS SALINE LAKES BIOSPHERE AQUATIC ECOSYSTEMS LAKES ANTARCTIC ANTARCTICA SEA WATER VESTFOLD HILLS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR |
spellingShingle |
geoscientificInformation inlandWaters oceans LAKE ICE EARTH SCIENCE TERRESTRIAL HYDROSPHERE SNOW/ICE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS SALINE LAKES BIOSPHERE AQUATIC ECOSYSTEMS LAKES ANTARCTIC ANTARCTICA SEA WATER VESTFOLD HILLS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
topic_facet |
geoscientificInformation inlandWaters oceans LAKE ICE EARTH SCIENCE TERRESTRIAL HYDROSPHERE SNOW/ICE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER > SURFACE WATER FEATURES > LAKES/RESERVOIRS SALINE LAKES BIOSPHERE AQUATIC ECOSYSTEMS LAKES ANTARCTIC ANTARCTICA SEA WATER VESTFOLD HILLS AMD/AU CEOS AMD CONTINENT > ANTARCTICA > GEOGRAPHIC REGION > POLAR |
description |
Dates provided in temporal coverage are approximate only. From the referenced paper: The frigid concentration or freezing of seawater is an important natural phenomenon in the polar regions and results in the precipitation of a different sequence of salts - and thus produces brines of different composition - to that formed during isothermal evaporation under temperate conditions (about 20-25 degrees C). Seawater freezing, however, has been studied less extensively than evaporation and somewhat greater uncertainty exists over the exact nature of the compositional pathway followed. Most investigators have shown that the precipitation of mirabilite (Na2SO4 - 10 H2O) or gypsum (CaSO4 - 2 H2O), which both occur at the same seawater concentration factor (SWCF), is the critical difference between frigid and evaporative concentration, respectively, a consequence of the very different temperature dependence of the solubilities of these salts, as well as the effect of sodium chloride on these properties. This difference can be considered to represent a temperature-dependent chemical divide in the closed-basin concentration of seawater because it determines significantly the major ion composition of the brine and the salt mineral assemblage precipitated on further evolution of the system. Recently new insights into seawater freezing have been achieved through improvements in existing chemical equilibrium models. Along with the results of some associated experimental work, this has provided evidence for the formation of gypsum during freezing, contradicting the accepted Ringer-Nelson-Thompson model of frigid concentration firmly established in the 1950's and through subsequent studies, but validating an alternative model proposed by Gitterman two decades later. |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
title_short |
Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
title_full |
Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
title_fullStr |
Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
title_full_unstemmed |
Trace Element Chemistry of Antarctic Saline Lakes and Fjords |
title_sort |
trace element chemistry of antarctic saline lakes and fjords |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/trace-element-chemistry-lakes-fjords/685983 https://data.aad.gov.au/metadata/records/ASAC_568 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=568 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1597 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_568 |
op_coverage |
Spatial: northlimit=-68.0; southlimit=-69.0; westlimit=78.0; eastLimit=79.0 Temporal: From 1992-10-01 to 1995-03-31 |
long_lat |
ENVELOPE(162.050,162.050,-77.250,-77.250) ENVELOPE(78.0,79.0,-68.0,-69.0) |
geographic |
Antarctic Ringer Vestfold Vestfold Hills |
geographic_facet |
Antarctic Ringer Vestfold Vestfold Hills |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/trace-element-chemistry-lakes-fjords/685983 e59ffdec-d36b-4736-8b10-9ef25d17b6c2 https://data.aad.gov.au/metadata/records/ASAC_568 https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=568 http://data.aad.gov.au/aadc/portal/download_file.cfm?file_id=1597 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_568 |
_version_ |
1766245648927031296 |