Diatoms abundance in sediment core PS58/271-1
Here we present an improvement of paleotemperature reconstructions for the Southern Ocean by combining new diatom data from the Pacific sector with published Atlantic and Indian sector reference data. The statistical analysis of 336 surface sediment samples recovered from a wide area of Southern Oce...
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Language: | English |
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PANGAEA
2008
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.693745 https://doi.org/10.1594/PANGAEA.693745 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.693745 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Actinocyclus actinochilus Actinocyclus curvatulus ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Climate Change: Learning from the past climate Counting diatoms DEPTH sediment/rock Diatoms indeterminata Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus karstenii KL Navicula directa Nitzschia sicula var. bicuneata Nitzschia sicula var. rostrata Paleoenvironmental Reconstructions from Marine Sediments @ AWI Past4Future Piston corer (BGR type) Pleurosigma directum Polarstern Porosira pseudodenticulata PS58 PS58/271-1 Pseudo-nitzschia heimii Pseudo-nitzschia lineola-turgiduloides group Rhizosolenia antennata forma antennata Rhizosolenia antennata forma semispina Rhizosolenia sp. Rouxia leventerae Southeast Pacific Stellarima microtrias Stellarima stellaris Thalassionema nitzschioides forma 1 |
spellingShingle |
Actinocyclus actinochilus Actinocyclus curvatulus ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Climate Change: Learning from the past climate Counting diatoms DEPTH sediment/rock Diatoms indeterminata Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus karstenii KL Navicula directa Nitzschia sicula var. bicuneata Nitzschia sicula var. rostrata Paleoenvironmental Reconstructions from Marine Sediments @ AWI Past4Future Piston corer (BGR type) Pleurosigma directum Polarstern Porosira pseudodenticulata PS58 PS58/271-1 Pseudo-nitzschia heimii Pseudo-nitzschia lineola-turgiduloides group Rhizosolenia antennata forma antennata Rhizosolenia antennata forma semispina Rhizosolenia sp. Rouxia leventerae Southeast Pacific Stellarima microtrias Stellarima stellaris Thalassionema nitzschioides forma 1 Esper, Oliver Gersonde, Rainer Diatoms abundance in sediment core PS58/271-1 |
topic_facet |
Actinocyclus actinochilus Actinocyclus curvatulus ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Climate Change: Learning from the past climate Counting diatoms DEPTH sediment/rock Diatoms indeterminata Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus karstenii KL Navicula directa Nitzschia sicula var. bicuneata Nitzschia sicula var. rostrata Paleoenvironmental Reconstructions from Marine Sediments @ AWI Past4Future Piston corer (BGR type) Pleurosigma directum Polarstern Porosira pseudodenticulata PS58 PS58/271-1 Pseudo-nitzschia heimii Pseudo-nitzschia lineola-turgiduloides group Rhizosolenia antennata forma antennata Rhizosolenia antennata forma semispina Rhizosolenia sp. Rouxia leventerae Southeast Pacific Stellarima microtrias Stellarima stellaris Thalassionema nitzschioides forma 1 |
description |
Here we present an improvement of paleotemperature reconstructions for the Southern Ocean by combining new diatom data from the Pacific sector with published Atlantic and Indian sector reference data. The statistical analysis of 336 surface sediment samples recovered from a wide area of Southern Ocean environments defines a supra-regional reference data set for quantitative summer sea surface temperature (SSST) estimations. In situ temperature measurements covering the time span from approx. 1900 to 1991 were used as reference instead of more recent time series of satellite-derived data, possibly biased by ocean warming. Different transfer function (TF) models for the Imbrie and Kipp Method (IKM), the Modern Analog Technique (MAT), Weighted Averaging (WA), and Weighted Averaging Partial Least Squares (WAPLS) were tested. Best performance for IKM was obtained using the D336 set with 29 diatom taxa and three factors, resulting in root mean square error of prediction (RMSEP) of 0.833 °C for SSST. MAT estimates were best with six analogs resulting in lowest RMSEP of 0.812 °C. WAPLS applied to D336 resulted in a RMSEP of 0.782 °C. WA performed less well, expressed by a RMSEP of 0.974 °C. Furthermore, two subsets for the Atlantic (D151) and the Pacific sectors (D107) were applied with IKM to test for advantages of localized TFs. IKM-D151 and IKM-D107 performed comparably good as IKM-D336, with RMSEP of 0.71 °C and 0.68 °C, respectively. Application of the augmented reference data sets on two Pleistocene sediment records from the Atlantic (PS1768-8) and Pacific (PS58/271-1) sectors led to best performance of IKM with D336, expressed by high overall communalities (> 0.75) and fewer (PS1768-8) to no (PS58/271-1) no-analogs, compared to the regional data sets, proving IKM-D336 to deal better with higher assemblage variability. SSST estimates for both cores exhibit similar glacial/interglacial patterns for all four applied D336-based TF methods, with best concordance between IKM and WAPLS. |
format |
Dataset |
author |
Esper, Oliver Gersonde, Rainer |
author_facet |
Esper, Oliver Gersonde, Rainer |
author_sort |
Esper, Oliver |
title |
Diatoms abundance in sediment core PS58/271-1 |
title_short |
Diatoms abundance in sediment core PS58/271-1 |
title_full |
Diatoms abundance in sediment core PS58/271-1 |
title_fullStr |
Diatoms abundance in sediment core PS58/271-1 |
title_full_unstemmed |
Diatoms abundance in sediment core PS58/271-1 |
title_sort |
diatoms abundance in sediment core ps58/271-1 |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.693745 https://doi.org/10.1594/PANGAEA.693745 |
op_coverage |
LATITUDE: -61.243000 * LONGITUDE: -116.047000 * DATE/TIME START: 2001-03-20T03:43:00 * DATE/TIME END: 2001-03-20T05:25:00 * MINIMUM DEPTH, sediment/rock: 0.06 m * MAXIMUM DEPTH, sediment/rock: 24.40 m |
long_lat |
ENVELOPE(-116.047000,-116.047000,-61.243000,-61.243000) |
genre |
Antarc* Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctica Southern Ocean |
op_source |
Supplement to: Esper, Oliver; Gersonde, Rainer (2014): Quaternary surface water temperature estimations: New diatom transfer functions for the Southern Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 414, 1-19, https://doi.org/10.1016/j.palaeo.2014.08.008 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.693745 https://doi.org/10.1594/PANGAEA.693745 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.69374510.1016/j.palaeo.2014.08.008 |
_version_ |
1799479191512547328 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.693745 2024-05-19T07:29:25+00:00 Diatoms abundance in sediment core PS58/271-1 Esper, Oliver Gersonde, Rainer LATITUDE: -61.243000 * LONGITUDE: -116.047000 * DATE/TIME START: 2001-03-20T03:43:00 * DATE/TIME END: 2001-03-20T05:25:00 * MINIMUM DEPTH, sediment/rock: 0.06 m * MAXIMUM DEPTH, sediment/rock: 24.40 m 2008 text/tab-separated-values, 11956 data points https://doi.pangaea.de/10.1594/PANGAEA.693745 https://doi.org/10.1594/PANGAEA.693745 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.693745 https://doi.org/10.1594/PANGAEA.693745 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Esper, Oliver; Gersonde, Rainer (2014): Quaternary surface water temperature estimations: New diatom transfer functions for the Southern Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 414, 1-19, https://doi.org/10.1016/j.palaeo.2014.08.008 Actinocyclus actinochilus Actinocyclus curvatulus ANT-XVIII/5a Asteromphalus hookeri Asteromphalus hyalinus Asteromphalus parvulus AWI_Paleo Azpeitia tabularis var. egregius Azpeitia tabularis var. tabularis Chaetoceros spp. Climate Change: Learning from the past climate Counting diatoms DEPTH sediment/rock Diatoms indeterminata Eucampia antarctica Fragilariopsis curta Fragilariopsis cylindrus Fragilariopsis doliolus Fragilariopsis kerguelensis Fragilariopsis obliquecostata Fragilariopsis rhombica Fragilariopsis ritscheri Fragilariopsis separanda Fragilariopsis sublinearis Hemidiscus karstenii KL Navicula directa Nitzschia sicula var. bicuneata Nitzschia sicula var. rostrata Paleoenvironmental Reconstructions from Marine Sediments @ AWI Past4Future Piston corer (BGR type) Pleurosigma directum Polarstern Porosira pseudodenticulata PS58 PS58/271-1 Pseudo-nitzschia heimii Pseudo-nitzschia lineola-turgiduloides group Rhizosolenia antennata forma antennata Rhizosolenia antennata forma semispina Rhizosolenia sp. Rouxia leventerae Southeast Pacific Stellarima microtrias Stellarima stellaris Thalassionema nitzschioides forma 1 Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.69374510.1016/j.palaeo.2014.08.008 2024-04-30T23:34:34Z Here we present an improvement of paleotemperature reconstructions for the Southern Ocean by combining new diatom data from the Pacific sector with published Atlantic and Indian sector reference data. The statistical analysis of 336 surface sediment samples recovered from a wide area of Southern Ocean environments defines a supra-regional reference data set for quantitative summer sea surface temperature (SSST) estimations. In situ temperature measurements covering the time span from approx. 1900 to 1991 were used as reference instead of more recent time series of satellite-derived data, possibly biased by ocean warming. Different transfer function (TF) models for the Imbrie and Kipp Method (IKM), the Modern Analog Technique (MAT), Weighted Averaging (WA), and Weighted Averaging Partial Least Squares (WAPLS) were tested. Best performance for IKM was obtained using the D336 set with 29 diatom taxa and three factors, resulting in root mean square error of prediction (RMSEP) of 0.833 °C for SSST. MAT estimates were best with six analogs resulting in lowest RMSEP of 0.812 °C. WAPLS applied to D336 resulted in a RMSEP of 0.782 °C. WA performed less well, expressed by a RMSEP of 0.974 °C. Furthermore, two subsets for the Atlantic (D151) and the Pacific sectors (D107) were applied with IKM to test for advantages of localized TFs. IKM-D151 and IKM-D107 performed comparably good as IKM-D336, with RMSEP of 0.71 °C and 0.68 °C, respectively. Application of the augmented reference data sets on two Pleistocene sediment records from the Atlantic (PS1768-8) and Pacific (PS58/271-1) sectors led to best performance of IKM with D336, expressed by high overall communalities (> 0.75) and fewer (PS1768-8) to no (PS58/271-1) no-analogs, compared to the regional data sets, proving IKM-D336 to deal better with higher assemblage variability. SSST estimates for both cores exhibit similar glacial/interglacial patterns for all four applied D336-based TF methods, with best concordance between IKM and WAPLS. Dataset Antarc* Antarctica Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-116.047000,-116.047000,-61.243000,-61.243000) |