Matches in SemOpenAlex for { <https://semopenalex.org/work/W4384207970> ?p ?o ?g. }
- W4384207970 endingPage "104644" @default.
- W4384207970 startingPage "104644" @default.
- W4384207970 abstract "Glycerol dialkyl glycerol tetraethers (GDGTs) have been widely applied to coastal marine sediments to reconstruct past temperature variability. However, coastal environments are characterised by variability in the source, age and/or thermal maturity of different organic carbon (OC) pools and may bias various GDGT-based proxies. Here we analyse TEX86 and MBT5ME values within a shallow marine sediment core (South Dover Bridge, Maryland) from the Paleocene-Eocene Thermal Maximum (PETM; 56 million years ago (Ma)) to explore how changes in OC reworking influence GDGT-derived sea surface and terrestrial temperature estimates, respectively. We demonstrate that TEX86 values are unaffected by an increase in soil- and fossil organic carbon during the PETM. In contrast, we find large and unexpected variations in MBT5ME-derived temperature estimates (∼6 to 25 °C) during the onset and core of the PETM at some sites. This coincides with input of reworked terrestrial OC from the Cenomanian-aged Raritan Formation. However, there is also an increase in the degree of cyclisation of tetramethylated branched GDGTs, suggesting that branched GDGTs are also derived from marine in-situ production. These factors preclude terrestrial temperature reconstructions at this site. We explored whether OC reworking is problematic in other PETM-aged coastal environments. Using GDGT metrics and the Branched and Isoprenoid GDGT Machine learning Classification algorithm (BIGMaC), we demonstrate that TEX86 values are mostly unaffected by changes in OC sources. However, MBT5ME values are affected by marine and/or freshwater overprints, especially in environments with low terrestrial OC input. Taken together, this study highlights the importance of constraining the provenance of different GDGTs in marine and lacustrine environments." @default.
- W4384207970 created "2023-07-14" @default.
- W4384207970 creator A5012754249 @default.
- W4384207970 creator A5024107541 @default.
- W4384207970 creator A5032427401 @default.
- W4384207970 creator A5034603331 @default.
- W4384207970 creator A5041771662 @default.
- W4384207970 creator A5043459145 @default.
- W4384207970 creator A5073524319 @default.
- W4384207970 date "2023-09-01" @default.
- W4384207970 modified "2023-10-14" @default.
- W4384207970 title "Impact of organic carbon reworking upon GDGT temperature proxies during the Paleocene-Eocene Thermal Maximum" @default.
- W4384207970 cites W1983794578 @default.
- W4384207970 cites W1991143586 @default.
- W4384207970 cites W2002706814 @default.
- W4384207970 cites W2002715778 @default.
- W4384207970 cites W2002805432 @default.
- W4384207970 cites W2005832186 @default.
- W4384207970 cites W2015872291 @default.
- W4384207970 cites W2019767377 @default.
- W4384207970 cites W2020778049 @default.
- W4384207970 cites W2021408515 @default.
- W4384207970 cites W2028837171 @default.
- W4384207970 cites W2028930166 @default.
- W4384207970 cites W2040164579 @default.
- W4384207970 cites W2044420278 @default.
- W4384207970 cites W2046802063 @default.
- W4384207970 cites W2048219285 @default.
- W4384207970 cites W2052740648 @default.
- W4384207970 cites W2061374328 @default.
- W4384207970 cites W2064664609 @default.
- W4384207970 cites W2073058404 @default.
- W4384207970 cites W2075209552 @default.
- W4384207970 cites W2090547944 @default.
- W4384207970 cites W2096072741 @default.
- W4384207970 cites W2104208100 @default.
- W4384207970 cites W2104285468 @default.
- W4384207970 cites W2116424114 @default.
- W4384207970 cites W2120560331 @default.
- W4384207970 cites W2120692670 @default.
- W4384207970 cites W2131661856 @default.
- W4384207970 cites W2131719384 @default.
- W4384207970 cites W2138691699 @default.
- W4384207970 cites W2141648278 @default.
- W4384207970 cites W2145953584 @default.
- W4384207970 cites W2146025856 @default.
- W4384207970 cites W2163565940 @default.
- W4384207970 cites W2168108191 @default.
- W4384207970 cites W2171640258 @default.
- W4384207970 cites W2221717039 @default.
- W4384207970 cites W2260222237 @default.
- W4384207970 cites W2290983735 @default.
- W4384207970 cites W2296265331 @default.
- W4384207970 cites W2342633710 @default.
- W4384207970 cites W2419229425 @default.
- W4384207970 cites W2419322613 @default.
- W4384207970 cites W2539236330 @default.
- W4384207970 cites W2594702982 @default.
- W4384207970 cites W2793941950 @default.
- W4384207970 cites W2903939507 @default.
- W4384207970 cites W2909556170 @default.
- W4384207970 cites W2933476843 @default.
- W4384207970 cites W2940609554 @default.
- W4384207970 cites W2954164465 @default.
- W4384207970 cites W2961878278 @default.
- W4384207970 cites W2977385666 @default.
- W4384207970 cites W2979680525 @default.
- W4384207970 cites W3007403121 @default.
- W4384207970 cites W3035728927 @default.
- W4384207970 cites W3095034522 @default.
- W4384207970 cites W3095985258 @default.
- W4384207970 cites W3132525491 @default.
- W4384207970 cites W3140371271 @default.
- W4384207970 cites W4220907821 @default.
- W4384207970 cites W4288712246 @default.
- W4384207970 cites W4293830357 @default.
- W4384207970 cites W4294168869 @default.
- W4384207970 cites W4296984847 @default.
- W4384207970 cites W4297017747 @default.
- W4384207970 cites W4304097954 @default.
- W4384207970 cites W4318311149 @default.
- W4384207970 cites W4383312784 @default.
- W4384207970 doi "https://doi.org/10.1016/j.orggeochem.2023.104644" @default.
- W4384207970 hasPublicationYear "2023" @default.
- W4384207970 type Work @default.
- W4384207970 citedByCount "0" @default.
- W4384207970 crossrefType "journal-article" @default.
- W4384207970 hasAuthorship W4384207970A5012754249 @default.
- W4384207970 hasAuthorship W4384207970A5024107541 @default.
- W4384207970 hasAuthorship W4384207970A5032427401 @default.
- W4384207970 hasAuthorship W4384207970A5034603331 @default.
- W4384207970 hasAuthorship W4384207970A5041771662 @default.
- W4384207970 hasAuthorship W4384207970A5043459145 @default.
- W4384207970 hasAuthorship W4384207970A5073524319 @default.
- W4384207970 hasBestOaLocation W43842079701 @default.
- W4384207970 hasConcept C107872376 @default.
- W4384207970 hasConcept C111368507 @default.
- W4384207970 hasConcept C127313418 @default.