Branched GDGTs of sediment and soil samples from Svalbard
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.882439 2023-05-15T18:29:47+02:00 Branched GDGTs of sediment and soil samples from Svalbard Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S MEDIAN LATITUDE: 78.907732 * MEDIAN LONGITUDE: 12.726172 * SOUTH-BOUND LATITUDE: 78.300000 * WEST-BOUND LONGITUDE: 10.665170 * NORTH-BOUND LATITUDE: 79.296330 * EAST-BOUND LONGITUDE: 15.766670 2017-11-02 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.882439 https://doi.org/10.1594/PANGAEA.882439 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.882439 https://doi.org/10.1594/PANGAEA.882439 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Peterse, Francien; Kim, Jung-Hyun; Schouten, Stefan; Klitgaard-Kristensen, Dorthe; Koç, Nalân; Sinninghe Damsté, Jaap S (2009): Constraints on the application of the MBT/CBT palaeothermometer at high latitude environments (Svalbard, Norway). Organic Geochemistry, 40(6), 692-699, https://doi.org/10.1016/j.orggeochem.2009.03.004 NIOZ_UU NIOZ Royal Netherlands Institute for Sea Research and Utrecht University Dataset 2017 ftpangaea https://doi.org/10.1594/PANGAEA.882439 https://doi.org/10.1016/j.orggeochem.2009.03.004 2023-01-20T07:34:02Z 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 Svalbard PANGAEA - Data Publisher for Earth & Environmental Science Svalbard ENVELOPE(10.665170,15.766670,79.296330,78.300000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
NIOZ_UU NIOZ Royal Netherlands Institute for Sea Research and Utrecht University |
spellingShingle |
NIOZ_UU NIOZ Royal Netherlands Institute for Sea Research and Utrecht University Peterse, Francien Kim, Jung-Hyun Schouten, Stefan Klitgaard-Kristensen, Dorthe Koç, Nalân Sinninghe Damsté, Jaap S Branched GDGTs of sediment and soil samples from Svalbard |
topic_facet |
NIOZ_UU NIOZ Royal Netherlands Institute for Sea Research and Utrecht University |
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 |
Branched GDGTs of sediment and soil samples from Svalbard |
title_short |
Branched GDGTs of sediment and soil samples from Svalbard |
title_full |
Branched GDGTs of sediment and soil samples from Svalbard |
title_fullStr |
Branched GDGTs of sediment and soil samples from Svalbard |
title_full_unstemmed |
Branched GDGTs of sediment and soil samples from Svalbard |
title_sort |
branched gdgts of sediment and soil samples from svalbard |
publisher |
PANGAEA |
publishDate |
2017 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.882439 https://doi.org/10.1594/PANGAEA.882439 |
op_coverage |
MEDIAN LATITUDE: 78.907732 * MEDIAN LONGITUDE: 12.726172 * SOUTH-BOUND LATITUDE: 78.300000 * WEST-BOUND LONGITUDE: 10.665170 * NORTH-BOUND LATITUDE: 79.296330 * EAST-BOUND LONGITUDE: 15.766670 |
long_lat |
ENVELOPE(10.665170,15.766670,79.296330,78.300000) |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Supplement to: Peterse, Francien; Kim, Jung-Hyun; Schouten, Stefan; Klitgaard-Kristensen, Dorthe; Koç, Nalân; Sinninghe Damsté, Jaap S (2009): Constraints on the application of the MBT/CBT palaeothermometer at high latitude environments (Svalbard, Norway). Organic Geochemistry, 40(6), 692-699, https://doi.org/10.1016/j.orggeochem.2009.03.004 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.882439 https://doi.org/10.1594/PANGAEA.882439 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.882439 https://doi.org/10.1016/j.orggeochem.2009.03.004 |
_version_ |
1766213166640922624 |