Results 61 to 70 of about 26,538 (206)

South Atlantic Multi‐Site Calibration of Coral Oxygen Isotope Paleothermometer

Geochemistry, Geophysics, Geosystems
Coral‐based stable oxygen isotopes (δ18O) have been used as a proxy for sea surface temperature (SST) since the 1970s, and δ18O–SST calibration studies have been fundamental to assure robust and faithful SST reconstructions.
N. S. Pereira, C. M. Chiessi, S. Crivellari, K. H. Kilbourne, R. K. P. Kikuchi, B. P. Ferreira, R. J. A. Macêdo, M. C. M. dosSantos, M. G. Pereira, L. S. Neves da Rocha, A. N. Sial   +10 more
doaj   +1 more source

Influence of thermochemical sulfate reduction on oxygen isotopic composition of calcite cements in carbonates of the Triassic Feixianguan and Permian Changxing formations in the Sichuan Basin, China

Frontiers in Earth Science, 2023
Calcite cement is a common diagenetic mineral in carbonate rocks and plays an important role on rock quality as hydrocarbon reservoirs. Traditionally, oxygen isotopic compositions (δ18O) of the diagenetic calcites tend to decrease with increasing depths ...
Guangwei Wang, Guangwei Wang, Fang Hao, Fang Hao, Huayao Zou, Pingping Li   +5 more
doaj   +1 more source

Additional file 1: of δ18O and SST signal decomposition and dynamic of the Pliocene-Pleistocene climate system: new insights on orbital nonlinear behavior vs. long-term trend

, 2018
Methodology. (DOC 1687 kb)
openaire   +1 more source

High-resolution late-glacial chronology for the Gerzensee lake record (Switzerland): δ18O correlation between a Gerzensee-stack and NGRIP [PDF]

, 2013
Oxygen-isotope variations were analyzed on bulk samples of shallow-water lake marl from Gerzensee, Switzerland, in order to evaluate major and minor climatic oscillations during the late-glacial.
Schwander, Jakob, van Raden, Ulrike J., Eicher, Ueli, Leuenberger, Markus, Colombaroli, Daniele, van Leeuwen, Jacqueline F. N., Gilli, Adrian, Bernasconi, Stefano M.   +7 more
core   +1 more source

Review of the Salpausselkä ice‐marginal formations in Finland

Journal of Quaternary Science, EarlyView.
ABSTRACT Extensive Salpausselkä ice‐marginal formations were deposited in southern and eastern Finland during the Weichselian deglaciation. These comprise three major ridges (I, II, and III Salpausselkäs) and their eastern counterparts (Tuupovaara, Koitere, and Pielisjärvi), together forming laterally continuous ice‐marginal formations extending ...
Jukka‐Pekka Palmu, Jussi Hovikoski, Reijo Pitkäranta, Antti E. K. Ojala   +3 more
wiley   +1 more source

A new piece in the puzzle: The palaeoecological significance of bryozoans over 7000 years in Daidokutsu Cave (Okinawa, Japan)

Journal of Quaternary Science, EarlyView.
ABSTRACT Submarine caves are cryptic, climatically sensitive habitats with long‐term ecological dynamics that are poorly understood. We present the first palaeoecological analysis of bryozoans from Daidokutsu Cave (Okinawa, Japan), based on a sediment core spanning approximately the last 7000 years.
Emanuela Di Martino, Wing‐Tung Ruby Chiu, Kazuhiko Fujita, Akihisa Kitamura, Antonietta Rosso, Paul D. Taylor, Moriaki Yasuhara   +6 more
wiley   +1 more source

Late Quaternary lake filling and drying in northern Australia's largest freshwater lake

Journal of Quaternary Science, EarlyView.
ABSTRACT Lake Woods, Jurrkulu, is northern Australia's largest freshwater lake filled today in strong Indo–Australian summer monsoons (IASM) to maximum depths of ~5 m. On the western margins of the lake, two large arcuate ridges occur 20 to 40 m above the lake floor and inset within these are other mid‐elevation lake deposits, such as depositional ...
Tim J. Cohen, Zenobia Jacobs, Caitlyn Scobie, Sam Marx, William Reynolds, Matthew S. Forbes, Haidee Cadd, Xue Rui, Laura Mogensen, Alexandru Codilean, Réka H. Fülöp, Klaus M. Wilcken, Fabian Boesl, Alex F. Wall, Nicola Stromsoe   +14 more
wiley   +1 more source

Assessing fish movement and physiological traits along a salinity gradient by measuring stable oxygen isotope values in fish blood water and muscle water

Methods in Ecology and Evolution
Variations in stable oxygen isotopes (δ18O) in the body water of animals reflect changes in δ18O values in environmental water and the animals' physiological processes.
Ming‐Tsung Chung, Seishi Hagihara, Ryoshiro Wakiya, Ryusuke Sudo, Tomihiko Higuchi, Kazuki Yokouchi, Kotaro Shirai   +6 more
doaj   +1 more source

Forest or tundra? How different vegetation reconstructions of Last Glacial landscapes in Europe may shape our perception of early human dispersal processes

Journal of Quaternary Science, EarlyView.
ABSTRACT Regional variability and long‐term changes of past ecosystems likely had a strong impact on hunter–gatherer population dynamics, including the expansion of anatomically modern humans and the disappearance of Neanderthals. However, our understanding of these ecosystems remains limited, even when looking at large‐scale patterns, such as the ...
Oliver A. Kern, Anne Dallmeyer, Andreas Maier, Philipp Schlüter, Annika Vogel, Nikki Vercauteren   +5 more
wiley   +1 more source

Stable Isotope Research for Human Bioarchaeology in Southeast Asia: A Review of Research Trends, Gaps, and Opportunities

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Despite the increasing number of studies undertaking isotopic analyses on archaeological material, some regions of the world and certain research foci remain underresearched and underrepresented. One of these regions is Southeast Asia, where bioarchaeological research was only comparatively recently established compared with other regions of ...
Brianna J. Muir
wiley   +1 more source