Archaeal lipids trace ecology and evolution of marine ammonia-oxidizing archaea

R Rattanasriampaipong, YG Zhang, A Pearson… - Proceedings of the …, 2022 - pnas.org
Archaeal membrane lipids are widely used for paleotemperature reconstructions, yet these
molecular fossils also bear rich information about ecology and evolution of marine ammonia …

Open-Ocean Minima in δ13C Values of Particulate Organic Carbon in the Lower Euphotic Zone

HG Close, LC Henderson - Frontiers in Marine Science, 2020 - frontiersin.org
Extensive studies in the 1980s–1990s led to the characterization of latitudinal variations in
sea surface δ13C values of particulate organic carbon (δ13CPOC), and relationships were …

Climate variability, heat distribution, and polar amplification in the warm unipolar “icehouse” of the Oligocene

DKLL Jenny, T Reichgelt, CL O'Brien, X Liu… - Climate of the …, 2024 - cp.copernicus.org
The Oligocene (33.9–23.03 Ma) had warm climates with flattened meridional temperature
gradients, while Antarctica retained a significant cryosphere. These may pose imperfect …

Miocene evolution of North Atlantic sea surface temperature

JR Super, E Thomas, M Pagani… - Paleoceanography …, 2020 - Wiley Online Library
We reconstruct sea surface temperatures (SSTs) at Deep Sea Drilling Project Site 608
(42.836° N, 23.087°), north of the Azores Front, and Ocean Drilling Program Site 982 …

Coupled Mg/Ca and clumped isotope measurements indicate lack of substantial mixed layer cooling in the Western Pacific Warm Pool during the last∼ 5 million years

N Meinicke, MA Reimi, AC Ravelo… - Paleoceanography …, 2021 - Wiley Online Library
Abstract The Indo‐Pacific Warm Pool (IPWP) plays a crucial role in influencing climate
dynamics both in the tropics and globally. Yet, there is an ongoing controversy concerning …

[HTML][HTML] Evaluating isoprenoidal hydroxylated GDGT-based temperature proxies in surface sediments from the global ocean

D Varma, EC Hopmans, ZR van Kemenade… - … et Cosmochimica Acta, 2024 - Elsevier
Recently developed temperature proxies based on hydroxylated isoprenoid Glycerol Dialkyl
Glycerol Tetraethers (OH-isoGDGTs), such as% OH, R IO H, R IO H′ and OHC, have …

Late Cretaceous Temperature Evolution of the Southern High Latitudes: A TEX86 Perspective

LK O'Connor, SA Robinson, BDA Naafs… - Paleoceanography …, 2019 - Wiley Online Library
Abstract The Late Cretaceous was a greenhouse world, characterized by elevated
temperatures and high atmospheric pCO2. Even in the context of an extreme greenhouse …

A fifteen-million-year surface- and subsurface-integrated TEX86 temperature record from the eastern equatorial Atlantic

CMH Van Der Weijst, KJ Van Der Laan… - Climate of the Past …, 2021 - cp.copernicus.org
TEX 86 is a paleothermometer based on Thaumarcheotal glycerol dialkyl glycerol tetraether
(GDGT) lipids and is one of the most frequently used proxies for sea-surface temperature …

Ice sheet–free West Antarctica during peak early Oligocene glaciation

JP Klages, CD Hillenbrand, SM Bohaty, U Salzmann… - Science, 2024 - science.org
One of Earth's most fundamental climate shifts, the greenhouse-icehouse transition 34
million years ago, initiated Antarctic ice sheet buildup, influencing global climate until today …

[HTML][HTML] Depth-related differences in archaeal populations impact the isoprenoid tetraether lipid composition of the Mediterranean Sea water column

MA Besseling, EC Hopmans, M Koenen… - Organic …, 2019 - Elsevier
Thaumarchaeota are one of the most abundant groups of Archaea in the marine water
column. Their membrane consists of isoprenoid glycerol dibiphytanyl glycerol tetraethers …