Results 101 to 110 of about 32,255 (226)

The Impact of Climate and Land Cover Change on the Cryosphere and Hydrology of the Mackenzie River Basin, Canada

Water Resources Research
Northern basins are projected to continue warming at rates higher than the global average, with the impacts of warming compounded by concomitant deglaciation, permafrost thaw and vegetation shifts.
Mohamed E. Elshamy, John W. Pomeroy, Alain Pietroniro, Howard Wheater, Mohamed Abdelhamed   +4 more
doaj   +1 more source

Variable sequence of events during the past seven terminations in two deep-sea cores from the Southern Ocean [PDF]

, 2012
The relationships among internally consistent records of summer sea-surface temperature (SSST), winter sea ice (WSI), and diatomaceous stable isotopes were studied across seven terminations over the last 660 ka in sedimentary cores from ODP sites 1093 ...
Bianchi, C., Gersonde, Rainer, Kunz-Pirrung, Martina, Schneider Mor, A., Shemesh, A., Yam, R.   +5 more
core   +1 more source

Deglaciation of southern Quebec

, 1972
A compilation of morainic features, eskers, glacial striations, and radiocarbon dates relating to final deglaciation is presented for the Appalachian Mountains and St. Lawrence Lowlands areas of southern Quebec. The data have been obtained largely by Geological Survey of Canada mapping since 1950.
N R Gadd, B C McDonald, W W Shilts
openaire   +1 more source

Microbially generated ferruginous crusts: A potential biosignature of continental input in coastal settings

Sedimentology, EarlyView.
ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder, Renata Guimarães Netto, Alisson Klayton Martins   +2 more
wiley   +1 more source

Chronology for climate change: Developing age models for the biogeochemical ocean flux study cores [PDF]

, 2004
We construct age models for a suite of cores from the northeast Atlantic Ocean by means of accelerator mass spectrometer dating of a key core, BOFS 5K, and correlation with the rest of the suite.
Manighetti, B, Maslin, M, McCave, IN, Shackleton, NJ   +3 more
core   +1 more source

Variations in downslope activity and bottom current dynamics in a land‐detached submarine channel system since the Last Glacial Maximum

Sedimentology, EarlyView.
ABSTRACT The Gollum Channel System is a land‐detached large‐scale canyon‐channel system situated offshore southwest Ireland on the Northeast Atlantic margin. The system has been considered inactive with downslope gravity flows since the last glacial period, but geophysical data in some of its branches do suggest Holocene activity.
Lotte Verweirder, Aggeliki Georgiopoulou, Kobus Langedock, Fred Fourie, Martin White, Sara Benetti, Fabio Sacchetti, Wieter Boone, David Van Rooij   +8 more
wiley   +1 more source

THE STUDY OF LAKE ONEGO AND ITS DRAINAGE BASIN PALEOGEOGRAPHY USING A SET OF METHODS

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2017
The authors own and literary data on long-term paleogeographical research of Lake Onego and its drainage basin carried out using a set of methods are summarized in the article.
Lyudmila Filimonova, Nadezhda Lavrova
doaj   +1 more source

Anatomy of a Dansgaard-Oeschger warming transition: High-resolution analysis of the North Greenland Ice Core Project ice core [PDF]

, 2008
Large and abrupt temperature oscillations during the last glacial period, known as Dansgaard‐Oeschger (DO) events, are clearly observed in the Greenland ice core record.
Elizabeth R. Thomas, Eric W. Wolff, Robert Mulvaney, Sigfus J. Johnsen, Jorgen P. Steffensen, Carol Arrowsmith, Altabet, Andersen, Bard, Behl, Biscaye, Blunier, Bond, Bory, Broecker, Broecker, Broecker, Bromwich, Brook, Brown, Burns, Cortijo, Cuffey, Curry, Dansgaard, Dansgaard, De Angelis, Denton, EPICA Community Members, Flückiger, Fuhrer, Gherardi, Grootes, Heinrich, Hendy, Hendy, Huber, Hughen, Johnsen, Johnsen, Jouzel, Jouzel, Jouzel, Keigwin, Knorr, Knutti, Lang, Legrand, Masson‐Delmotte, Masson‐Delmotte, Mayewski, Mayewski, Mogensen, North Greenland Ice Core Project Members (NGRIP Members), Orvik, Peterson, Petit, Rasmussen, Rousseau, Ruth, Schmidt, Schulz, Severinghaus, Severinghaus, Shackleton, Steffensen, Stocker, Stott, Svensson, Taylor, Thomas, Thomas, Thorpe, Vidal, Voelker, Wang   +75 more
core   +1 more source

Growth and reworking of freshwater microbially‐mediated carbonates in wind‐stressed lake margins (Lago Sarmiento, Southern Patagonia)

Sedimentology, EarlyView.
ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada, Mauricio Calderón, Anelize Bahniuk, Carolina Henríquez, Tatiana Stepanenko, José Pérez‐Donoso, Nicolás Bruna, Larissa Santos, Guilherme Fedalto, Luis Mancini, Leonardo Fadel Cury   +10 more
wiley   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, EarlyView.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source