Results 51 to 60 of about 122,513 (216)

A first chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core [PDF]

Climate of the Past, 2013
A stratigraphy-based chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core has been derived by transferring the annual layer counted Greenland Ice Core Chronology 2005 (GICC05) and its model extension (GICC05modelext) from the NGRIP core
S. O. Rasmussen, P. M. Abbott, T. Blunier, A. J. Bourne, E. Brook, S. L. Buchardt, C. Buizert, J. Chappellaz, H. B. Clausen, E. Cook, D. Dahl-Jensen, S. M. Davies, M. Guillevic, S. Kipfstuhl, T. Laepple, I. K. Seierstad, J. P. Severinghaus, J. P. Steffensen, C. Stowasser, A. Svensson, P. Vallelonga, B. M. Vinther, F. Wilhelms, M. Winstrup   +23 more
doaj   +1 more source

Simulating higher-order fabric structure in a coupled, anisotropic ice-flow model: application to Dome C

Journal of Glaciology, 2023
Ice-crystal fabric can induce mechanical anisotropy that significantly affects flow, but ice-flow models generally do not include fabric development or its effect upon flow.
David A. Lilien, Nicholas M. Rathmann, Christine S. Hvidberg, Aslak Grinsted, M. Reza Ershadi, Reinhard Drews, Dorthe Dahl-Jensen   +6 more
doaj   +1 more source

Major Δ14C excursions during the late glacial and early Holocene: changes in ocean ventilation or solar forcing of climate change? [PDF]

, 2003
The atmospheric 14C record during the Late Glacial and the early Holocene shows sharp increases simultaneous with cold climatic phases. These increases in the atmospheric 14C content are usually explained as the effect of reduced oceanic CO2 ventilation ...
Geel, B. van, Renssen, H, van der Plicht, Johannes, van der Plicht, J., Renssen, Hans,, Geel, Bas van,, Plicht, J. van der, Renssen, H., van Geel, B., Plicht, Johannes van der,   +9 more
core   +1 more source

Greenland during the last interglacial: the relative importance of insolation and oceanic changes [PDF]

Climate of the Past, 2016
Insolation changes during the Eemian (the last interglacial period, 129 000–116 000 years before present) resulted in warmer than present conditions in the Arctic region.
R. A. Pedersen, P. L. Langen, B. M. Vinther   +2 more
doaj   +1 more source

Random and externally controlled occurrences of Dansgaard–Oeschger events [PDF]

Climate of the Past, 2018
Dansgaard–Oeschger (DO) events constitute the most pronounced mode of centennial to millennial climate variability of the last glacial period. Since their discovery, many decades of research have been devoted to understand the origin and nature of ...
J. Lohmann, P. D. Ditlevsen
doaj   +1 more source

Ice nucleation under cirrus cloud conditions [PDF]

, 2012
Cirrus are thin upper tropospheric clouds that are composed entirely of ice particles. Due to their extensive coverage of the Earth’s surface, they have a significant impact on the Earth’s radiative balance.
Wilson, Theodore W
core  

Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries? [PDF]

, 2014
General Circulation Model simulations of the mid-Pliocene warm period (mPWP, 3.264 to 3.025 Myr ago) currently underestimate the level of warming that proxy data suggest existed at high latitudes, with discrepancies of up to 11°C for sea surface ...
Haywood, Alan, Wade, Bridget, Francis, JE, Francis, Jane, Wade, Bridget S., Hill, Daniel J., Hill, DJ, Haywood, Alan M., Dowsett, Harry, Pope, James O., Howell, Fergus, Pope, James, Pickering, Steven, Howell, FW, Dowsett, Harry J., Pickering, SJ, Pickering, Steven J., Salzmann, U, Howell, Fergus W., Dolan, Aisling, Dolan, Aisling M., Haywood, AM, Salzmann, Ulrich, Francis, Jane E., Dolan, AM, Dowsett, HJ, Hill, Daniel, Pope, JO, Wade, BS   +28 more
core   +1 more source

Aerosol composition trends during 2000–2020: in-depth insights from model predictions and multiple worldwide near-surface observation datasets [PDF]

Atmospheric Chemistry and Physics
Atmospheric aerosols significantly impact Earth's climate and air quality. In addition to their number and mass concentrations, chemical composition influences their environmental effects.
A. P. Tsimpidi, S. M. C. Scholz, A. Milousis, N. Mihalopoulos, V. A. Karydis   +4 more
doaj   +1 more source

A new set-up for simultaneous high-precision measurements of CO₂, δ¹³C-CO₂ and δ¹⁸O-CO₂ on small ice core samples [PDF]

Atmospheric Measurement Techniques, 2016
Palaeoatmospheric records of carbon dioxide and its stable carbon isotope composition (δ13C) obtained from polar ice cores provide important constraints on the natural variability of the carbon cycle.
T. M. Jenk, M. Rubino, D. Etheridge, V. G. Ciobanu, T. Blunier   +4 more
doaj   +1 more source

Climate change 2013: the physical science basis [PDF]

, 2013
This report argues that it is extremely likely that human influence has been the dominant cause of the observed warming since the mid-20th century. This is an an unedited version of the Intergovernmental Panel on Climate Change\u27s Working Group I ...

core