Data

Ocean temperatures over time estimated from planktonic foraminifera assemblages in core MD002361 located on the shelf edge off Western Australia. Estimates are provided for the sea-surface, 50m, 100m, and 150m

Australian Ocean Data Network
Spooner, Michelle ; De Deckker, Patrick
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=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/4837df50-07f7-11dc-92a7-00188b4c0af8&rft.title=Ocean temperatures over time estimated from planktonic foraminifera assemblages in core MD002361 located on the shelf edge off Western Australia. Estimates are provided for the sea-surface, 50m, 100m, and 150m&rft.identifier=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/4837df50-07f7-11dc-92a7-00188b4c0af8&rft.description=In recent years the term 'enhanced greenhouse effect' has become well known in modern society and yet aspects of this possible 'future climate' are poorly understood. The characteristics of the geological record provide a basis to understand this possible future climate through the examination of alternating glacial (cold) and interglacial (warm) stages. Understanding the variability of sea-surface temperature and biological processes in the water column provides insight into general circulation of present and paleo-ocean currents. At a core site off Western Australia (MD002361, 113.477166 E, 22.082 S) the highest annual SST estimate (Tmean) of 29.1oC ± 0.84oC was recorded during MIS 5, 1.6oC warmer than the modern recorded Tmean. Most interglacial periods were equivalent or warmer than present apart from Marine Isotope Stage (MIS) 7. The most extreme glacial to interglacial transition was from the penultimate glacial period (MIS 6) to the last interglacial (MIS 5) with a temperature range of 8.7oC ± 0.84oC. The mixed layer is also thinner during interglacial periods compared to the glacial periods.Maintenance and Update Frequency: notPlannedStatement: Sea-surface temperatures (SST) were estimated from planktonic foraminifera assemblage data. The most precise variable of SST is mean annual temperature, followed by Tmax, then Tmin. All variables have a root mean squared error of prediction of less than 1 degree C. Most of the SST estimates are reasonably precise, given that the samples have good analogues in the AUSMAT-F4 database. Stages with reduced quality of SST estimates are during MIS 5 (70k - 130k BP) and MIS 7 (180k - 240k BP). Parameters: Age of core (yrs BP), mean water temperature (oC), maximum water temperature (oC), minimum water temperature (oC), depth of mixed layer (m), temperature at 50m, 100m and 150m (oC).Statement: Sea-surface temperatures (SST) were estimated from planktonic foraminifera assemblage data using the modern analogue technique (MAT), in conjunction with the AUSMAT-F4 database. Each SST estimate was calculated as the mean of the best 10 analogues from the global database.&rft.creator=Spooner, Michelle &rft.creator=De Deckker, Patrick &rft.date=2007&rft.coverage=113.48338,-22.09163 113.48516,-22.09177 113.48469,-22.09283 113.48360,-22.09270 113.48338,-22.09163&rft.coverage=westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22&rft.coverage=westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22&rft.coverage=uplimit=2034; downlimit=2034&rft.coverage=uplimit=2034; downlimit=2034&rft_rights=Creative Commons Attribution 2.5 Australia License http://creativecommons.org/licenses/by/2.5/au/&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_subject=oceans&rft_subject=WATER TEMPERATURE&rft_subject=EARTH SCIENCE&rft_subject=OCEANS&rft_subject=OCEAN TEMPERATURE&rft_subject=age_of_core&rft_subject=sea_surface_temperature&rft_subject=depth&rft.type=dataset&rft.language=English Access the data
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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

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In recent years the term 'enhanced greenhouse effect' has become well known in modern society and yet aspects of this possible 'future climate' are poorly understood. The characteristics of the geological record provide a basis to understand this possible future climate through the examination of alternating glacial (cold) and interglacial (warm) stages. Understanding the variability of sea-surface temperature and biological processes in the water column provides insight into general circulation of present and paleo-ocean currents. At a core site off Western Australia (MD002361, 113.477166 E, 22.082 S) the highest annual SST estimate (Tmean) of 29.1oC ± 0.84oC was recorded during MIS 5, 1.6oC warmer than the modern recorded Tmean. Most interglacial periods were equivalent or warmer than present apart from Marine Isotope Stage (MIS) 7. The most extreme glacial to interglacial transition was from the penultimate glacial period (MIS 6) to the last interglacial (MIS 5) with a temperature range of 8.7oC ± 0.84oC. The mixed layer is also thinner during interglacial periods compared to the glacial periods.

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Maintenance and Update Frequency: notPlanned
Statement: Sea-surface temperatures (SST) were estimated from planktonic foraminifera assemblage data. The most precise variable of SST is mean annual temperature, followed by Tmax, then Tmin. All variables have a root mean squared error of prediction of less than 1 degree C. Most of the SST estimates are reasonably precise, given that the samples have good analogues in the AUSMAT-F4 database. Stages with reduced quality of SST estimates are during MIS 5 (70k - 130k BP) and MIS 7 (180k - 240k BP). Parameters: Age of core (yrs BP), mean water temperature (oC), maximum water temperature (oC), minimum water temperature (oC), depth of mixed layer (m), temperature at 50m, 100m and 150m (oC).
Statement: Sea-surface temperatures (SST) were estimated from planktonic foraminifera assemblage data using the modern analogue technique (MAT), in conjunction with the AUSMAT-F4 database. Each SST estimate was calculated as the mean of the best 10 analogues from the global database.

Notes

Credit
The Australian National University (ANU)
Credit
Funded by The National Oceans Office (NOO)
Credit
Funded by The Australian Research Council (ARC)
Credit
Funded by The French Polar Institute
Credit
Funded by The Australian Institute of Nuclear Science Engineering (AINSE)
Credit
Funded by The Murray Darling Basin Commission
Purpose
To investigate the dynamics of the Leeuwin Current. The hope was to determine synchronity between different cores and to indicate whether the Leeuwin Current was absent or reduced during glacial periods and enhanced or unchanged during interglacial periods.

Issued: 22 03 2007

Data time period: 2000-01-01 to 2000-01-01

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113.48338,-22.09163 113.48516,-22.09177 113.48469,-22.09283 113.4836,-22.0927 113.48338,-22.09163

113.48427,-22.09223

113.5,-22 113.5,-22.5 113,-22.5 113,-22 113.5,-22

113.25,-22.25

text: westlimit=113; southlimit=-22.5; eastlimit=113.5; northlimit=-22

text: uplimit=2034; downlimit=2034

Subjects
EARTH SCIENCE | OCEAN TEMPERATURE | OCEANS | Water Temperature | age_of_core | depth | oceans | sea_surface_temperature |

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Other Information
(ANU_Spooner_MD002361_4_data.xls)

url : https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/4837df50-07f7-11dc-92a7-00188b4c0af8/attachments/ANU_Spooner_MD002361_4_data.xls

Core data - Leeuwin Current (aodn:bluenet_datasets_leeuwin_current)

url : http://geoserver-123.aodn.org.au/geoserver/wms

global : 85ccfd40-07f8-11dc-92a7-00188b4c0af8

Identifiers
  • global : 4837df50-07f7-11dc-92a7-00188b4c0af8