Results 91 to 100 of about 101,389 (308)

Cooling climate across last interglacial high stands on San Salvador and Great Inagua, The Bahamas

The Depositional Record, EarlyView.
Temperature data comparison with last interglacial mollusc clumped isotope data from this study, as well as from Bermuda (Minnebo et al., 2024; Zhang et al., 2021). The ‘later’ and ‘earlier’ ages within MIS 5e refer to Reef II and Reef I, respectively, for Bahamas data.
Ian Winkelstern, Sierra Petersen, H. Allen Curran, Cecilie Phillips, Alex Quizon, Bosiljka Glumac, David Griffing   +6 more
wiley   +1 more source

Increased West Antarctic and unchanged East Antarctic ice discharge over the last 7 years [PDF]

The Cryosphere, 2018
Ice discharge from large ice sheets plays a direct role in determining rates of sea-level rise. We map present-day Antarctic-wide surface velocities using Landsat 7 and 8 imagery spanning 2013–2015 and compare to earlier estimates derived from ...
A. S. Gardner, G. Moholdt, T. Scambos, M. Fahnstock, S. Ligtenberg, M. van den Broeke, J. Nilsson   +6 more
doaj   +1 more source

Carbonate sedimentology: An evolved discipline

The Depositional Record, EarlyView.
Abstract Although admired and examined since antiquity, carbonate sediment and rock research really began with Charles Darwin who, during a discovery phase, studied, documented and interpreted their nature in the mid‐19th century. The modern discipline, however, really began after World War II and evolved in two distinct phases.
Noel P. James, Peir K. Pufahl
wiley   +1 more source

Lateglacial and Holocene mountain glacier fluctuations near Cape Farewell South Greenland inferred from 10Be moraine dating

Journal of Quaternary Science, EarlyView.
ABSTRACT We report 43 new 10Be exposure ages and six 26Al/10Be measurements from replicates from a small piedmont mountain glacier located at Cape Farewell (south Greenland) and temperature anomalies estimated from equilibrium‐line altitude (ELA) changes derived from 3D glacier reconstruction carried out using the ‘GlaRe’ toolbox.
Vincent Jomelli, Joanna Charton, José M. Fernández‐Fernández, Régis Braucher, Didier Swingedouw, Amen Al Yaari, Marc Oliva, Stephanie Gairoard, Julia García‐Oteyza, Aster Team   +9 more
wiley   +1 more source

Instantaneous Antarctic ice sheet mass loss driven by thinning ice shelves

Geophysical Research Letters, 2019
Recent observations show that the rate at which the Antarctic ice sheet (AIS) is contributing to sea level rise is increasing. Increases in ice‐ocean heat exchange have the potential to induce substantial mass loss through the melting of its ice shelves.
G. Gudmundsson, F. Paolo, S. Adusumilli, H. Fricker   +3 more
semanticscholar   +1 more source

Vigorous lateral export of the meltwater outflow from beneath an Antarctic ice shelf [PDF]

, 2017
The instability and accelerated melting of the Antarctic Ice Sheet are among the foremost elements of contemporary global climate change1, 2. The increased freshwater output from Antarctica is important in determining sea level rise1, the fate of ...
A Fabregat Tomàs, A Jenkins, A Jenkins, A Shepherd, Adrian Jenkins, AG Pauling, AL Stewart, Alberto C. Naveira Garabato, Alexander Forryan, AM Thurnherr, B Loose, BJ Hoskins, CD Rye, D Carroll, DL Rudnick, FS Paolo, G Richardson, GJ Shutts, HD Pritchard, I Joughin, I Kim, J Feldmann, J Marshall, Karen J. Heywood, KR Arrigo, KR Arrigo, KW Nicholls, L Herráiz-Borreguero, L Padman, Liam Brannigan, LN Thomas, Louise C. Biddle, M Thoma, MA Depoorter, NC Swart, NS Oakey, P Dutrieux, P St-Laurent, Pierre Dutrieux, R Bintanja, R Hohmann, R Pawlowicz, R Robertson, R Robertson, S Schmidtko, Satoshi Kimura, SG Purkey, T Cowton, TR Osborn, TWN Haine, V Daru, Y Nakayama, Y Xu, Yvonne L. Firing   +53 more
core   +5 more sources

Glacial meltwater drives high CH4 supersaturation in Maxwell Bay, King George Island (Southern Ocean)

Limnology and Oceanography Letters, EarlyView.
Abstract Coastal waters exhibit the highest and most dynamic dissolved CH4 concentrations in marine environments, but significant knowledge gaps on the distribution and emissions, particularly in the Southern Ocean, still exist. We quantified dissolved CH4 concentrations and sea–air fluxes in the coastal waters of Maxwell Bay, King George Island ...
Lina A. Holthusen, Hermann W. Bange, Damian L. Arévalo‐Martínez, Thomas H. Badewien, Juan Höfer, Carolin R. Löscher, Camila Marín‐Arias, Jens Meyerjürgens, Isabell Schlangen, Oliver Wurl   +9 more
wiley   +1 more source

Glacial-cycle simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model (PISM) – Part 1: Boundary conditions and climatic forcing

, 2020
. Simulations of the glacial–interglacial history of the Antarctic Ice Sheet provide insights into dynamic threshold behavior and estimates of the ice sheet's contributions to global sea-level changes for the past, present and future.
T. Albrecht, R. Winkelmann, A. Levermann
semanticscholar   +1 more source

Competing climate feedbacks of ice sheet freshwater discharge in a warming world

Nature Communications
Freshwater discharge from ice sheets induces surface atmospheric cooling and subsurface ocean warming, which are associated with negative and positive feedbacks respectively. However, uncertainties persist regarding these feedbacks’ relative strength and
Dawei Li, Robert M. DeConto, David Pollard, Yongyun Hu   +3 more
doaj   +1 more source

Life In and Under the Antarctic Ice Sheets [PDF]

Microscopy Today, 2008
Abstract The discovery of viable microbial life in ancient glacial ice has opened up a plethora of questions related to how life can be sustained in such extreme environments. Cryo-microscopic analysis of lab prepared ice samples indicates that microbes are located in the small veins of water that exist between individual ice crystals ...
Brent C. Christner, Shawn M. Doyle, Pierre Amato   +2 more
openaire   +2 more sources