(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden
Branched glycerol dialkyl glycerol tetraethers (GDGTs) are membrane lipids of unknown bacteria that are ubiquitous in soil and peat. Two indices based on the distribution of these lipids in soils, the Cyclization of Branched Tetraethers (CBT) and the Methylation of Branched Tetraethers (MBT) indices...
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Online Access: | https://dx.doi.org/10.1594/pangaea.882408 https://doi.pangaea.de/10.1594/PANGAEA.882408 |
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ftdatacite:10.1594/pangaea.882408 2023-05-15T17:05:14+02:00 (Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S 2009 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.882408 https://doi.pangaea.de/10.1594/PANGAEA.882408 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://store.pangaea.de/Publications/NIOZ_GDGT_structure/Peterse-etal_2009/Fig1.JPG https://dx.doi.org/10.1594/pangaea.882439 https://dx.doi.org/10.1016/j.orggeochem.2009.03.004 https://store.pangaea.de/Publications/NIOZ_GDGT_structure/Peterse-etal_2009/Fig1.JPG Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Latitude of event Longitude of event DEPTH, sediment/rock Carbon, organic, total Branched glycerol dialkyl glycerol tetraether, Ia Branched glycerol dialkyl glycerol tetraether, Ib Branched glycerol dialkyl glycerol tetraether, Ic Branched glycerol dialkyl glycerol tetraether, IIa Branched glycerol dialkyl glycerol tetraether, IIb Branched glycerol dialkyl glycerol tetraether, IIc Branched glycerol dialkyl glycerol tetraether, IIIa Branched glycerol dialkyl glycerol tetraether, IIIb Branched glycerol dialkyl glycerol tetraether, IIIc Branched glycerol dialkyl glycerol tetraether Branched and isoprenoid tetraether index Cyclization ratio of branched tetraethers Methylation index of branched tetraethers Temperature, annual mean MultiCorer Calculated from the MBT/CBT proxy LA07/9 Lance NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU dataset Dataset 2009 ftdatacite https://doi.org/10.1594/pangaea.882408 https://doi.org/10.1594/pangaea.882439 https://doi.org/10.1016/j.orggeochem.2009.03.004 2021-11-05T12:55:41Z Branched glycerol dialkyl glycerol tetraethers (GDGTs) are membrane lipids of unknown bacteria that are ubiquitous in soil and peat. Two indices based on the distribution of these lipids in soils, the Cyclization of Branched Tetraethers (CBT) and the Methylation of Branched Tetraethers (MBT) indices have been shown to correlate with soil pH, and mean annual air temperature (MAT) and soil pH, respectively, and can be used to reconstruct MAT in palaeoenvironments. To verify the extent to which branched GDGTs in marine sediments reflect the distribution pattern on land and whether these proxies are applicable for palaeoclimate reconstruction in high latitude environments with a MAT of <0 °C, we compared the branched GDGT distribution in Svalbard soils and nearby fjord sediments. Although branched GDGT concentrations in the soil are relatively low (0.02-0.95 µg/g dry weight (dw)) because of the cold climate and the short growing season, reconstructed MATs based on the MBT/CBT proxy are ca. -4 °C, close to the measured MAT (ca. -6 °C). Concentrations of branched GDGTs (0.01-0.20 µg/g dw) in fjord sediments increased towards the open ocean and the distribution was strikingly different from that in soil, i.e. dominated by GDGTs with one cyclopentane moiety. This resulted in MBT/CBT-reconstructed MAT values of 11- 19 °C, well above measured MAT. The results suggest that at least part of the branched GDGTs in marine sediments in settings with a low soil organic matter (OM) input may be produced in situ. In these cases, the application of the MBT/CBT palaeothermometer will generate unrealistic MAT reconstructions. The MBT/CBT proxy should therefore only be used at sites with a substantial input of soil OM relative to the amount of marine OM, i.e. at sites close to the mouth of rivers with a catchment area where sufficient soil formation takes place and the soil thus contains substantial amounts of branched GDGTs. Dataset Kongsfjord* Kongsfjorden Krossfjord* Svalbard DataCite Metadata Store (German National Library of Science and Technology) Krossfjorden ENVELOPE(11.742,11.742,79.141,79.141) Svalbard |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Latitude of event Longitude of event DEPTH, sediment/rock Carbon, organic, total Branched glycerol dialkyl glycerol tetraether, Ia Branched glycerol dialkyl glycerol tetraether, Ib Branched glycerol dialkyl glycerol tetraether, Ic Branched glycerol dialkyl glycerol tetraether, IIa Branched glycerol dialkyl glycerol tetraether, IIb Branched glycerol dialkyl glycerol tetraether, IIc Branched glycerol dialkyl glycerol tetraether, IIIa Branched glycerol dialkyl glycerol tetraether, IIIb Branched glycerol dialkyl glycerol tetraether, IIIc Branched glycerol dialkyl glycerol tetraether Branched and isoprenoid tetraether index Cyclization ratio of branched tetraethers Methylation index of branched tetraethers Temperature, annual mean MultiCorer Calculated from the MBT/CBT proxy LA07/9 Lance NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU |
spellingShingle |
Event label Latitude of event Longitude of event DEPTH, sediment/rock Carbon, organic, total Branched glycerol dialkyl glycerol tetraether, Ia Branched glycerol dialkyl glycerol tetraether, Ib Branched glycerol dialkyl glycerol tetraether, Ic Branched glycerol dialkyl glycerol tetraether, IIa Branched glycerol dialkyl glycerol tetraether, IIb Branched glycerol dialkyl glycerol tetraether, IIc Branched glycerol dialkyl glycerol tetraether, IIIa Branched glycerol dialkyl glycerol tetraether, IIIb Branched glycerol dialkyl glycerol tetraether, IIIc Branched glycerol dialkyl glycerol tetraether Branched and isoprenoid tetraether index Cyclization ratio of branched tetraethers Methylation index of branched tetraethers Temperature, annual mean MultiCorer Calculated from the MBT/CBT proxy LA07/9 Lance NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S (Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
topic_facet |
Event label Latitude of event Longitude of event DEPTH, sediment/rock Carbon, organic, total Branched glycerol dialkyl glycerol tetraether, Ia Branched glycerol dialkyl glycerol tetraether, Ib Branched glycerol dialkyl glycerol tetraether, Ic Branched glycerol dialkyl glycerol tetraether, IIa Branched glycerol dialkyl glycerol tetraether, IIb Branched glycerol dialkyl glycerol tetraether, IIc Branched glycerol dialkyl glycerol tetraether, IIIa Branched glycerol dialkyl glycerol tetraether, IIIb Branched glycerol dialkyl glycerol tetraether, IIIc Branched glycerol dialkyl glycerol tetraether Branched and isoprenoid tetraether index Cyclization ratio of branched tetraethers Methylation index of branched tetraethers Temperature, annual mean MultiCorer Calculated from the MBT/CBT proxy LA07/9 Lance NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University NIOZ_UU |
description |
Branched glycerol dialkyl glycerol tetraethers (GDGTs) are membrane lipids of unknown bacteria that are ubiquitous in soil and peat. Two indices based on the distribution of these lipids in soils, the Cyclization of Branched Tetraethers (CBT) and the Methylation of Branched Tetraethers (MBT) indices have been shown to correlate with soil pH, and mean annual air temperature (MAT) and soil pH, respectively, and can be used to reconstruct MAT in palaeoenvironments. To verify the extent to which branched GDGTs in marine sediments reflect the distribution pattern on land and whether these proxies are applicable for palaeoclimate reconstruction in high latitude environments with a MAT of <0 °C, we compared the branched GDGT distribution in Svalbard soils and nearby fjord sediments. Although branched GDGT concentrations in the soil are relatively low (0.02-0.95 µg/g dry weight (dw)) because of the cold climate and the short growing season, reconstructed MATs based on the MBT/CBT proxy are ca. -4 °C, close to the measured MAT (ca. -6 °C). Concentrations of branched GDGTs (0.01-0.20 µg/g dw) in fjord sediments increased towards the open ocean and the distribution was strikingly different from that in soil, i.e. dominated by GDGTs with one cyclopentane moiety. This resulted in MBT/CBT-reconstructed MAT values of 11- 19 °C, well above measured MAT. The results suggest that at least part of the branched GDGTs in marine sediments in settings with a low soil organic matter (OM) input may be produced in situ. In these cases, the application of the MBT/CBT palaeothermometer will generate unrealistic MAT reconstructions. The MBT/CBT proxy should therefore only be used at sites with a substantial input of soil OM relative to the amount of marine OM, i.e. at sites close to the mouth of rivers with a catchment area where sufficient soil formation takes place and the soil thus contains substantial amounts of branched GDGTs. |
format |
Dataset |
author |
Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S |
author_facet |
Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S |
author_sort |
Peterse, Francien |
title |
(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
title_short |
(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
title_full |
(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
title_fullStr |
(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
title_full_unstemmed |
(Table 3) General properties, branched GDGT concentrations and proxy values for marine surface sediments in Kongsfjorden and Krossfjorden |
title_sort |
(table 3) general properties, branched gdgt concentrations and proxy values for marine surface sediments in kongsfjorden and krossfjorden |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2009 |
url |
https://dx.doi.org/10.1594/pangaea.882408 https://doi.pangaea.de/10.1594/PANGAEA.882408 |
long_lat |
ENVELOPE(11.742,11.742,79.141,79.141) |
geographic |
Krossfjorden Svalbard |
geographic_facet |
Krossfjorden Svalbard |
genre |
Kongsfjord* Kongsfjorden Krossfjord* Svalbard |
genre_facet |
Kongsfjord* Kongsfjorden Krossfjord* Svalbard |
op_relation |
https://store.pangaea.de/Publications/NIOZ_GDGT_structure/Peterse-etal_2009/Fig1.JPG https://dx.doi.org/10.1594/pangaea.882439 https://dx.doi.org/10.1016/j.orggeochem.2009.03.004 https://store.pangaea.de/Publications/NIOZ_GDGT_structure/Peterse-etal_2009/Fig1.JPG |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.882408 https://doi.org/10.1594/pangaea.882439 https://doi.org/10.1016/j.orggeochem.2009.03.004 |
_version_ |
1766059661494059008 |