Results 31 to 40 of about 2,249,217 (299)

Paleobotanical proxies for early Eocene climates and ecosystems in northern North America from middle to high latitudes [PDF]

Climate of the Past, 2020
Early Eocene climates were globally warm, with ice-free conditions at both poles. Early Eocene polar landmasses supported extensive forest ecosystems of a primarily temperate biota but also with abundant thermophilic elements, such as crocodilians, and ...
C. K. West, D. R. Greenwood, T. Reichgelt, A. J. Lowe, J. M. Vachon, J. F. Basinger   +5 more
doaj   +1 more source

The physics of wind-blown loess: Implications for grain size proxy interpretations in Quaternary paleoclimate studies

, 2016
Loess deposits are recorders of aeolian activity during past glaciations. Since the size distribution of loess deposits depends on distance to the dust source, and environmental conditions at the source, during transport, and at deposition, loess ...
G. Újvári, J. Kok, G. Varga, J. Kovács   +3 more
semanticscholar   +1 more source

Data supporting Maastrichtian paleoclimate variables applying a multi proxy approach to a paleosol profile, Arctic Alaska

Data in Brief, 2020
We provide the dataset of climate variables related to the research article “Paleoclimate reconstruction of the Prince Creek Formation, Arctic Alaska, during Maastrichtian global warming” [1].
Susana Salazar-Jaramillo, Paul J. McCarthy, Andrés Ochoa, Sarah J. Fowell, Fred J. Longstaffe   +4 more
doaj   +1 more source

Chimpanzee Rights: The Philosophers' Brief [PDF]

, 2018
In December 2013, the Nonhuman Rights Project (NhRP) filed a petition for a common law writ of habeas corpus in the New York State Supreme Court on behalf of Tommy, a chimpanzee living alone in a cage in a shed in rural New York (Barlow, 2017).
Andrews, Kristin, Comstock, Gary, Crozier, G. K. D., Donaldson, Sue, Fenton, Andrew, John, Tyler, Johnson, L. Syd M., Jones, Robert, Kymlicka, Will, Meynell, Letitia, Nobis, Nathan, Pena-Guzman, David M., Sebo, Jeff   +12 more
core   +1 more source

PRYSM v2.0: A Proxy System Model for Lacustrine Archives

Paleoceanography and Paleoclimatology, 2018
Reconstructions of temperature and hydrology from lake sedimentary archives have made fundamental contributions to our understanding of past, present, and future climate and help evaluate general circulation models (GCMs).
S. Dee, James M. Russell, C. Morrill, Zihan Chen, A. Neary   +4 more
semanticscholar   +1 more source

Miocene orographic uplift forces rapid hydrological change in the southern central Andes [PDF]

, 2016
Rainfall in the central Andes associated with the South American Monsoon and the South American Low-Level Jet results from orographic effects on atmospheric circulation exerted by the Andean Plateau and the Eastern Cordillera.
Alonso, Ricardo Narciso, Mulch, Andreas, Pingel, Heiko, Rohrmann, Alexander, Sachse, Dirk, Strecker, Manfred R., Tofelde, Stefanie   +6 more
core   +1 more source

A continental reconstruction of hydroclimatic variability in South America during the past 2000 years [PDF]

Climate of the Past
Paleoclimatological field reconstructions are valuable for understanding past hydroclimatic variability, which is crucial for assessing potential future hydroclimate changes.
M. A. Choblet, M. A. Choblet, M. A. Choblet, J. C. Bühler, V. F. Novello, N. J. Steiger, N. J. Steiger, K. Rehfeld   +7 more
doaj   +1 more source

Electron flux is a key determinant of uranium isotope fractionation during bacterial reduction

Communications Earth & Environment, 2023
Uranium isotopic signatures in the rock record are utilized as a proxy for past redox conditions on Earth. However, these signatures display significant variability that complicates the interpretation of specific redox conditions. Using the model uranium-
Ashley R. Brown, Margaux Molinas, Yvonne Roebbert, Ataru Sato, Minori Abe, Stefan Weyer, Rizlan Bernier-Latmani   +6 more
doaj   +1 more source

Main controls on the stable carbon isotope composition of speleothems [PDF]

, 2020
The climatic controls on the stable carbon isotopic composition (δ13C) of speleothem carbonate are less often discussed in the scientific literature in contrast to the frequently used stable oxygen isotopes.
J. Fohlmeister, N. R. Voarintsoa, F. Lechleitner, Meighan Boyd, Susanne Brandtstätter, M. Jacobson, Jessica L. Oster   +6 more
semanticscholar   +1 more source

Assessing the Validity of Negative High Field Strength-Element Anomalies as a Proxy for Archaean Subduction: Evidence from the Ben Strome Complex, NW Scotland

Geosciences, 2018
The relative depletion of high field strength elements (HFSE), such as Nb, Ta and Ti, on normalised trace-element plots is a geochemical proxy routinely used to fingerprint magmatic processes linked to Phanerozoic subduction.
George L. Guice, Iain McDonald, Hannah S. R. Hughes, Denis M. Schlatter, Kathryn M. Goodenough, John M. MacDonald, John W. Faithfull   +6 more
doaj   +1 more source