Results 31 to 40 of about 1,022,984 (305)

The Formation of Uranus and Neptune in Solid-Rich Feeding Zones: Connecting Chemistry and Dynamics [PDF]

, 2009
The core accretion theory of planet formation has at least two fundamental problems explaining the origins of Uranus and Neptune: (1) dynamical times in the trans-Saturnian solar nebula are so long that core growth can take > 15 Myr, and (2) the onset of
Alexander, Alibert, Bauer, Bodenheimer, Colwell, Currie, Dodson-Robinson, Dodson-Robinson, Dodson-Robinson, Encrenaz, Fernandez, Goldreich, Goldreich, Gomes, Guillot, Haisch, Henyey, Hicks, Hubickyj, Ida, Johansen, Kary, Levison, Levison, Lin, Marley, Mizuno, Morbidelli, Papaloizou, Papaloizou, Peter Bodenheimer, Podolak, Podolak, Podolak, Pollack, Rafikov, Sarah E. Dodson-Robinson, Stern, Thommes, Thommes, Tsiganis, Youdin   +41 more
core   +1 more source

Ice core hot-flid drilling

Antarctic Record, 1994
Fast hole production is possible using ice core hot-fluid drilling. The present paper describes a method for calculation of drill penetration rate dependent on the fluid flux, fluid temperature, physical properties of fluid, size of hot-fluid drill head ...
B.B. Kudryashov, N.G. Menshikov
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

Effects of ENSO on the major ion record of a Qomolangma (Mount Everest) ice core

Annals of Glaciology, 2016
Correlations between a 1000 year record of the major ions in a 108.83 m ice core from East Rongbuk Glacier (28°01’N, 86°58’E; 6518ma.s.l.) on the northeast slope of Qomolangma (Mount Everest) and the Southern Oscillation Index (SOI) were examined to ...
Hao Xu, Shugui Hou, Hongxi Pang, Chaomin Wang   +3 more
doaj   +1 more source

Initial results from geophysical surveys and shallow coring of the Northeast Greenland Ice Stream (NEGIS) [PDF]

The Cryosphere, 2014
The Northeast Greenland Ice Stream (NEGIS) is the sole interior Greenlandic ice stream. Fast flow initiates near the summit dome, and the ice stream terminates approximately 1000 km downstream in three large outlet glaciers that calve into the Greenland ...
P. Vallelonga, K. Christianson, R. B. Alley, S. Anandakrishnan, J. E. M. Christian, D. Dahl-Jensen, V. Gkinis, C. Holme, R. W. Jacobel, N. B. Karlsson, B. A. Keisling, S. Kipfstuhl, H. A. Kjær, M. E. L. Kristensen, A. Muto, L. E. Peters, T. Popp, K. L. Riverman, A. M. Svensson, C. Tibuleac, B. M. Vinther, Y. Weng, M. Winstrup   +22 more
doaj   +1 more source

A Comparison Of New Calculations Of The Yearly 10Be Production In The Earths Polar Atmosphere By Cosmic Rays With Yearly 10Be Measurements In Multiple Greenland Ice Cores Between 1939 And 1994 - A Troubling Lack Of Concordance Paper #2

, 2010
We have compared the yearly production rates of 10Be by cosmic rays in the Earths polar atmosphere over the last 50-70 years with 10Be measurements from two separate ice cores in Greenland.
Aldahan, Ansmann, Auer, Bard, Bard, Bard, Bard, Baroni, Beer, Beer, Beer, Beer, Belov, Berggren, Briffa, Cacciani, Clilverd, Cole-Dai, Delaygue, Delmas, Delmas, Delmonte, Deshler, Didier Bourlès, Edouard Bard, Elmore, Field, Field, Fischer, Fourré, Gao, Gray, Hall, Heikkila, Holton, Horiuchi, Hoyt, Jean-Robert Petit, Kovaltsov, Lal, Lal, Masarik, Masarik, Masson-Delmotte, Mavromichalaki, Mayaud, Mc Cormick, Mc Cracken, Muscheler, Mélanie Baroni, Nagai, Naik, Niemeier, Nydal, Olivier Magand, Paillard, Pedro, Pedro, Petit, Pourchet, Raisbeck, Raisbeck, Raisbeck, Robock, Steig, Stuiver, Synal, Thompson, Timmreck, Usoskin, Usoskin, Usoskin, Usoskin, Vainio, Venegas, Wagenbach, Webber, Webber, White, Whitehead, Wolff   +80 more
core   +3 more sources

Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica [PDF]

, 2004
Understanding how ice sheets responded to past climate change is fundamental to forecasting how they will respond in the future. Numerical models calculating the evolution of ice sheets depend upon accumulation data, which are principally available from ...
Antony J. Payne, Gwendolyn J.-M. C. Leysinger Vieli, Martin J. Siegert, Paterson   +3 more
core   +2 more sources

Characterizing Spatial Variability of Ice Algal Chlorophyll a and Net Primary Production between Sea Ice Habitats Using Horizontal Profiling Platforms

Frontiers in Marine Science, 2017
Assessing the role of sea ice algal biomass and primary production for polar ecosystems remains challenging due to the strong spatio-temporal variability of sea ice algae.
Benjamin A. Lange, Benjamin A. Lange, Christian Katlein, Giulia Castellani, Mar Fernández-Méndez, Mar Fernández-Méndez, Marcel Nicolaus, Ilka Peeken, Ilka Peeken, Hauke Flores, Hauke Flores   +10 more
doaj   +1 more source

Air-snow exchange investigations at Summit, Greenland: An overview [PDF]

, 1997
The Greenland Ice Sheet Project 2 (GISP2) and Greenland Ice Core Project (GRIP) deep drilling programs at Summit, Greenland included support (both logistical and scientific) of extensive investigation of atmospheric transport and air-snow exchange ...
Dibb, Jack E., Jaffrezo, J L
core   +2 more sources

Seasonal evolution of granular and columnar sea ice pore microstructure and pore network connectivity

Journal of Glaciology, 2022
Sea-ice pore microstructure constrains ice transport properties, affecting fluid flow relevant to oil-in-ice transport and biogeochemical processes. Motivated by a lack of pore microstructural data, in particular for granular ice and across the seasonal ...
Marc Oggier, Hajo Eicken
doaj   +1 more source