Results 51 to 60 of about 2,119 (182)

Viability of chemical and water isotope ratio measurements of RAID ice chippings from Antarctica

Journal of Glaciology, 2023
The British Antarctic Survey's (BAS) Rapid Access Isotope Drill (RAID), designed for rapid drilling to survey prospective ice core sites, has been deployed at multiple Antarctic locations over 6 years.
Isobel F. Rowell, Robert Mulvaney, Julius Rix, Dieter R. Tetzner, Eric W. Wolff   +4 more
doaj   +1 more source

Single‐grain K‐feldspar luminescence dating on primary and re‐deposited aeolian sediments in Mongolia

Boreas, EarlyView.
Owing to its location in the semi‐arid region of northern Central Asia, Mongolia is highly sensitive to climate change and therefore provides an excellent setting for palaeoenvironmental research. Proxy data from different sediment types are crucial for interpreting past climate changes and landscape evolution, while burial ages provide chronological ...
Junjie Zhang, Michael Klinge, Sumiko Tsukamoto, Daniela Sauer, Manfred Frechen   +4 more
wiley   +1 more source

Palaeoclimates: the first two billion years [PDF]

Philosophical Transactions of the Royal Society B: Biological Sciences, 2006
Earth's climate during the Archaean remains highly uncertain, as the relevant geologic evidence is sparse and occasionally contradictory. Oxygen isotopes in cherts suggest that between 3.5 and 3.2 Gyr ago (Ga) the Archaean climate was hot (55–85 °C); however, the fact that these cherts have experienced only a modest amount of weathering suggests that ...
James F, Kasting, Shuhei, Ono
openaire   +2 more sources

LGM glaciation in the northern Dinaric Mountains, Slovenia: new insights from terrestrial cosmogenic nuclide dating and Parallel Ice Sheet Model simulation

Boreas, EarlyView.
The Dinaric Mountains are a mountain range stretching NW–SE from the Alps to the Albanides–Hellenides in central Europe. The highest parts were occupied by small ice fields and/or valley glaciers during the Quaternary cold periods, while even today some small glaciers still exist in topoclimatically favourable areas.
Manja Žebre, M. Akif Sarikaya, Matjaž Depolli, Uroš Stepišnik, Attila Çiner, Gregor Kosec, Klaus Wilcken, Cengiz Yildirim   +7 more
wiley   +1 more source

Triple Oxygen Isotope Compositions of Isotopic Reference Waters: Implications for VSMOW‐Scale and VSMOW–SLAP‐Scale Δ′17O Calibration

Geostandards and Geoanalytical Research, EarlyView.
Key Points Triple oxygen isotope ratios of two primary (VSMOW, SLAP) and twelve secondary water isotopic reference materials were precisely measured using BrF5 fluorination‐IRMS. The measured Δ'17OVSMOW value for SLAP (34 ± 6 per meg) demonstrates that VSMOW‐SLAP normalisation ensures interlaboratory comparability, but introduces systematic offsets for
Ryoji Tanaka, Andreas Pack, Tyler B. Coplen   +2 more
wiley   +1 more source

From the Last Glacial Maximum to the Late Holocene: Unraveling the dynamic complexities of climate and human history in Western and Southeastern Iran

Frontiers in Earth Science
Since the early Neolithic (∼10,000 years ago), the Iranian Plateau has witnessed the development of sedentary human settlement facilitated by periods of favorable climatic conditions prompting gradual or sweeping changes.
Alireza Vaezi, Lloyd Weeks, Joyanto Routh   +2 more
doaj   +1 more source

Multi‐proxy sequence stratigraphy of a mixed carbonate–siliciclastic shelf across the Jurassic–Cretaceous transition

The Depositional Record, Volume 12, Issue 4, September 2026.
An integrated facies, MS and XRF‐based approach applied to the Tithonian–Berriasian Sidi Khalif Formation (central Tunisia) resolves five Tithonian and eight Berriasian third‐order sequences, showing how mixed carbonate–siliciclastic shelves record coupled eustatic, climatic and tectonic controls and providing a transferable template for similar mud ...
Hamdi Omar, Adnene Lafi, Chokri Yaich
wiley   +1 more source

Implications of summer breeding frogs from Langebaanweg, South Africa: Regional climate evolution at 5.1 mya

South African Journal of Science, 2016
No direct palaeoclimatic proxies have been available to indicate the seasonality or amount of rainfall on the west coast of southern Africa during the Early Pliocene.
Thalassa Matthews, G. John Measey, †David L. Roberts   +2 more
doaj   +1 more source

Signals of Paleotemperature in the Age Structure and Seasonal Distribution of Pollination Syndromes Across a Temperate Region

Ecology and Evolution, Volume 16, Issue 8, August 2026.
Species with wind & insect pollination syndromes show distinct age structure patterns. Splitting insect pollination into different categories show constrasting age structure. Modern flowering seasons track paleotemperature signatures. ABSTRACT Across the planet, angiosperm diversification has been shaped by palaeoclimates and biotic interactions ...
Thomas Leclère, Igor Bartish, Pille Gerhold, Andreas Prinzing   +3 more
wiley   +1 more source

Temperature fluctuations controlled episodic rockfall activity in the Rwenzori Mountains (Uganda) during the Holocene

Earth Surface Processes and Landforms, Volume 51, Issue 8, August 2026.
The alignment between rockfall deposit surface exposure 10Be ages and Holocene temperature records suggests that major rockfall events occurred episodically in response to climatic fluctuations. We conclude that temperature and its evolution enabled mechanical, chemical or bio‐chemical enhancement of fracture progression.
Audrey Margirier, Konstanze Stübner, Christoph Schmidt, Johannes Lachner, Georg Rugel, Salome Oehler, Pontien Niyonzima, Rosemary Nalwanga, Anne Voigtländer   +8 more
wiley   +1 more source