Lmst

#GDGT

Throwback to 2011... I miss gdgt and those earlier gadgety times

https://cjs-wunderkammer.ghost.io/picture-a-day-oct-8/

#photography #blog #Panasonic #Lumix #GF1 #SanFrancisco #SFMOMA #night #Metreon #gdgt

The #GDGT #world also has a #frog, thanks to a #team with a majority of #FROGs* 🐸!
Véquaud et al. (2022) GCA
https://doi.org/10.1016/j.gca.2021.12.007
*#French #Researchers in Organic #Geochemistry
#Science
#ScienceMastodon

Unlike #TEX86, another #GDGT-based #paleotemperature #ClimateProxy named the #Ring #Index of hydroxylated tetraethers (RI-OH) behaves as an #SST proxy despite the terrigenous #inputs.
This #place too deserves a #thread about my related #PhD #research #publication in #Paleoceanography and #Paleoclimatology:
https://doi.org/10.1029/2018PA003452 (1/5)

#Science #ScienceMastodon #Paper
#PaleoClimate #PaleoClimates
#ClimateChange #ClimateChanges #AbruptClimateChange
#SeaSurfaceTemperature
#MediterraneanSea

Figure 3 in Davtian et al. (2019) Paleoceanography and Paleoclimatology (https://doi.org/10.1029/2018PA003452)
All plotted sedimentary records from the Gulf of Lion, western Mediterranean Sea, cover the 160 to 9 ka BP period.
(a) A sea surface temperature record from an established organic paleotemperature proxy named TEX86, which shows some spooky features.
(b) A very qualitative and imperfect record of terrigenous inputs, which shows many similarities with TEX86 in terms of trends.
(c) A sea surface temperature record from a recent organic paleotemperature proxy named RI-OH, which typically shows the expected behavior over the covered time period.
(d) Another good-looking sea surface temperature record but from the most established organic paleotemperature proxy named UK'37.
(e) A good-looking record from an established inorganic (non-strictly) paleotemperature proxy named d18O, with a reversed y-axis because foraminiferal d18O values decrease when sea temperatures increase.

Figure 4 in Davtian et al. (2019) Paleoceanography and Paleoclimatology (https://doi.org/10.1029/2018PA003452)
Essentially the same caption as for Figure 3 in Davtian et al. (2019) Paleoceanography and Paleoclimatology, but with a focus on the 70 to 20 ka BP period.

Two #basic #things to #know for #GDGT #lovers like me:
- These #nerdy #membrane-spanning #lipids are #ubiquitous in the #environment
- #GDGTs may have #multiple and #mixed #sources

If like a younger me* you apply #TEX86 in (#paleo)prodelta #deposits, be prepared to obtain #spooky #results from this #GDGT-based #paleotemperature #ClimateProxy!
#Links to the related #research #publication and #source #data in my auto-reply 👇🏻

*Me when I was a #PhDStudent

#HappyHalloween2024

Figure 3 in Davtian et al. (2019) Paleoceanography and Paleoclimatology (https://doi.org/10.1029/2018PA003452)
All plotted sedimentary records from the Gulf of Lion, western Mediterranean Sea, cover the 160 to 9 ka BP period.
(a) A sea surface temperature record from an established organic paleotemperature proxy named TEX86, which shows some spooky features.
(b) A very qualitative and imperfect record of terrigenous inputs, which shows many similarities with TEX86 in terms of trends.
(c) A sea surface temperature record from a recent organic paleotemperature proxy named RI-OH, which typically shows the expected behavior over the covered time period.
(d) Another good-looking sea surface temperature record but from the most established organic paleotemperature proxy named UK'37.
(e) A good-looking record from an established inorganic (non-strictly) paleotemperature proxy named d18O, with a reversed y-axis because foraminiferal d18O values decrease when sea temperatures increase.

Figure 4 in Davtian et al. (2019) Paleoceanography and Paleoclimatology (https://doi.org/10.1029/2018PA003452)
Essentially the same caption as for Figure 3 in Davtian et al. (2019) Paleoceanography and Paleoclimatology, but with a focus on the 70 to 20 ka BP period.

Are #nerdy #membrane-spanning #lipids produced by #bacteria and #archaea admitted on #Mastodon?

These lipids, named glycerol dialkyl glycerol tetraethers (#GDGTs), are my favorite #biomarkers for their usefulness as #climatic and #environmental #indicators and for having been the #protagonists of my #PhD #research.

Recently, I participated to an #international #workshop organized by #GDGT #nerds for GDGT nerds, sadly not active on this #platform as far as I know.

#Science #ScienceMastodon

Nerdy mug with two of Nina Davtian's favorite membrane-spanning lipids on it.
The molecule drawn in green is a bacterial membrane lipid whereas the molecule drawn in blue, red, and yellow is a famous archaeal membrane lipid named crenarchaeol.

Same nerdy mug as in the other photo but viewed from the other side.
The name of the (niche) international workshop to which Nina Davtian participated in September 2023 and the name of the city where this workshop was organized are visible.
GDGT stands for "glycerol dialkyl glycerol tetraether" and is the abbreviated name of Nina Davtian's favorite membrane-spanning lipids.

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