Nina Davtian

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

@gdgt

Nov 11, 2023 at 3:06pmWeb
Show threadNina DavtianNov 11, 2023
@gdgt
I wrote this research article essentially because it introduces the first sea surface temperature record based on RI-OH in the Gulf of Lion, western Mediterranean Sea, which I generated during my PhD: such novel results truly deserved to be published!
(2/5)
Show threadNina DavtianNov 11, 2023
@gdgt
I assessed the novel RI-OH paleothermometer following three approaches:
1) Correlations with successful, independent paleothermometers
2) Comparison of the new SST record to an independent, alkenone-based SST record
3) Regional compilation of glacial-interglacial SST anomalies
(3/5)
Show threadNina DavtianNov 11, 2023
@gdgt
My main findings:
1) RI-OH is consistent with established paleothermometric proxies (except TEX₈₆)
2) RI-OH seemingly* records winter and/or subsurface temperatures
3) RI-OH confirms the regional differences and seasonal contrasts in observed and modeled glacial-interglacial anomalies
(4/5)
Show threadNina DavtianNov 11, 2023
@gdgt
Overall, I can use the novel tetraether-based paleothermometer in a study site where TEX₈₆ is compromised by terrigenous inputs: here, the ubiquity of GDGTs is bad news for TEX₈₆!
*A regional calibration is needed to reevaluate which thermal signals RI-OH records in the Mediterranean Sea.
(5/5)