Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems
Palaeotemperature proxies based on glycerol dialkyl glycerol tetraethers (GDGTs) lipids have been established for marine and lacustrine environments, but there has been relatively little study of their application in speleothems. In this study we analyse the GDGT content of 33 speleothem samples fro...
| Main Authors: | , |
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| Format: | Journal Article |
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Pergamon
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/16979 |
| _version_ | 1848749331142672384 |
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| author | Blyth, Alison Schouten, S. |
| author_facet | Blyth, Alison Schouten, S. |
| author_sort | Blyth, Alison |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Palaeotemperature proxies based on glycerol dialkyl glycerol tetraethers (GDGTs) lipids have been established for marine and lacustrine environments, but there has been relatively little study of their application in speleothems. In this study we analyse the GDGT content of 33 speleothem samples from 16 different sites around the globe, and test whether proxies based on isoprenoid tetraethers (TEX86) or branched tetraethers (MBT/CBT) are correlated with measured surface and cave mean annual air temperature (MAT). The results show that the TEX86 has a strong relationship with measured temperature (r2 = 0.78, standard error of the estimate 2.3 C, when calibrated with surface MAT). Furthermore, the MBT/CBT also showed a significant relationship with temperature (r2 = 0.73, standard error of the estimate 2.7 C, when calibrated with surface MAT). Some issues remain requiring future work, in particular the development of a larger calibration sample set with measured cave temperature data, and the investigation of controls other than temperature on GDGT distribution, but overall the results indicate that GDGT based proxies derived from speleothems may be highly viable new methods for reconstructing continental palaeotemperatures. |
| first_indexed | 2025-11-14T07:19:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-16979 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:19:14Z |
| publishDate | 2013 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-169792019-02-19T04:25:52Z Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems Blyth, Alison Schouten, S. stalagmites MBT/CBT paleotemperature Speleothems GDGT TEX86 tetraethers Palaeotemperature proxies based on glycerol dialkyl glycerol tetraethers (GDGTs) lipids have been established for marine and lacustrine environments, but there has been relatively little study of their application in speleothems. In this study we analyse the GDGT content of 33 speleothem samples from 16 different sites around the globe, and test whether proxies based on isoprenoid tetraethers (TEX86) or branched tetraethers (MBT/CBT) are correlated with measured surface and cave mean annual air temperature (MAT). The results show that the TEX86 has a strong relationship with measured temperature (r2 = 0.78, standard error of the estimate 2.3 C, when calibrated with surface MAT). Furthermore, the MBT/CBT also showed a significant relationship with temperature (r2 = 0.73, standard error of the estimate 2.7 C, when calibrated with surface MAT). Some issues remain requiring future work, in particular the development of a larger calibration sample set with measured cave temperature data, and the investigation of controls other than temperature on GDGT distribution, but overall the results indicate that GDGT based proxies derived from speleothems may be highly viable new methods for reconstructing continental palaeotemperatures. 2013 Journal Article http://hdl.handle.net/20.500.11937/16979 10.1016/j.gca.2013.02.009 Pergamon fulltext |
| spellingShingle | stalagmites MBT/CBT paleotemperature Speleothems GDGT TEX86 tetraethers Blyth, Alison Schouten, S. Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title | Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title_full | Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title_fullStr | Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title_full_unstemmed | Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title_short | Calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| title_sort | calibrating the glycerol dialkyl glycerol tetraether temperature signal in speleothems |
| topic | stalagmites MBT/CBT paleotemperature Speleothems GDGT TEX86 tetraethers |
| url | http://hdl.handle.net/20.500.11937/16979 |