Index Catalog // ScholarsArchive@OSU

Early deglacial Atlantic overturning decline and its role in atmospheric CO₂ rise inferred from carbon isotopes (δ¹³C)

Creator:: Schmittner, A. and Lund, D. C.
Abstract:: The reason for the initial rise in atmospheric CO₂ during the last deglaciation remains unknown. Most recent hypotheses invoke Southern Hemisphere processes such as shifts in midlatitude westerly winds. Coeval changes in the Atlantic meridional overturning circulation (AMOC) are poorly quantified, and their relation to the CO₂ increase is not...
Resource Type:: Article

The Global Overturning Circulation Since the Last Glacial Maximum Based on Marine Authigenic Neodymium Isotopes

Creator:: Du, Jianghui
Abstract:: The Global Overturning Circulation (GOC) is a major component of the global climate system. Understanding its behavior is pertinent to our prediction of climate change in the future. The lack of long-term observations of GOC in the modern instrumental era necessitates studies of GOC using paleoceanographic records. Of great interest...
Resource Type:: Dissertation
Full Text:: ................................................................................................ 47 Chapter 3: Flushing of the deep Pacific Ocean and the deglacial rise of atmospheric CO2

The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia

Creator:: Davies, M. H., Mix, A. C., Stoner, J. S., Addison, J. A., Jaeger, J., Finney, B., and Wiest, J.
Abstract:: Oxygen isotope data from planktonic and benthic foraminifera, on a high-resolution age model (44 ¹⁴C dates spanning 17,400 years), document deglacial environmental change on the southeast Alaska margin (59°33.32′N, 144°9.21′W, 682 m water depth). Surface freshening (i.e., δ¹⁸O reduction of 0.8‰) began at 16,650 ± 170 cal years B.P. during...
Resource Type:: Article
Full Text:: , although it appears shelf processes and surface water discharge may play a role in regulating surface‐ocean

Last Century Warming Over the Canadian Atlantic Shelves Linked to Weak Atlantic Meridional Overturning Circulation

Creator:: Thibodeau, Benoit, Not, Christelle, Hu, Jiang, Schmittner, Andreas, Noone, David, Tabor, Clay, Zhang, Jiaxu, and Liu, Zhengyu
Abstract:: The Atlantic meridional overturning circulation (AMOC) is a key component of the global climate system. Recent studies suggested a twentieth-century weakening of the AMOC of unprecedented amplitude (similar to 15%) over the last millennium. Here we present a record of O-18 in benthic foraminifera from sediment cores retrieved from the...
Resource Type:: Article
Full Text:: deglacial Atlantic overturning decline and its role in atmospheric CO2 rise inferred from carbon isotopes (d

Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points

Creator:: Praetorius, Summer Kate
Abstract:: Paleoclimate archives have revealed abrupt climate events that are superimposed on more gradual climate changes throughout the last glacial and deglacial periods. The underlying causes of such rapid climate changes are still poorly understood, but the strong expression of these events in northern hemisphere records likely points to climatic mechanisms...
Resource Type:: Dissertation
Full Text:: its possible role in past climate change than its North Atlantic counterpart. Here we employ a

Onset of deglacial warming in West Antarctica driven by local orbital forcing

Creator:: Fudge, T. J., Steig, Eric J., Markle, Bradley R., Schoenemann, Spruce W., Ding, Qinghua, Taylor, Kendrick C., McConnell, Joseph R., Brook, Edward J., Sowers, Todd, White, James W. C., Alley, Richard B., Cheng, Hai, Clow, Gary D., Cole-Dai, Jihong, Conway, Howard, Cuffey, Kurt M., Edwards, Jon S., Edwards, R. Lawrence, Edwards, Ross, Fegyveresi, John M., Ferris, David, Fitzpatrick, Joan J., Johnson, Jay, Hargreaves, Geoffrey, Lee, James E., Maselli, Olivia J., Mason, William, McGwire, Kenneth C., Mitchell, Logan E., Mortensen, Nicolai, Neff, Peter, Orsi, Anais J., Popp, Trevor J., and Schauer, Andrew J.
Abstract:: The cause of warming in the Southern Hemisphere during the most recent deglaciation remains a matter of debate[superscript 1,2]. Hypotheses for a Northern Hemisphere trigger, through oceanic redistributions of heat, are based in part on the abrupt onset of warming seen in East Antarctic ice cores and dated to 18,000...
Resource Type:: Article
Full Text:: reconstruction of southwest Atlantic sea-ice and its role in the carbon cycle during marine isotope stages 3 and

Carbon cycle variability during the last millennium and last deglaciation

Creator:: Bauska, Thomas K.
Abstract:: The exchange of carbon on earth is one of the fundamental processes that sustains life and regulates climate. Since the onset of the Industrial Revolution, the burning of fossil fuels and anthropogenic land conversion have altered the carbon cycle, increasing carbon dioxide in the atmosphere to levels that are unprecedented...
Resource Type:: Dissertation
Full Text:: precise method for measuring the stable isotopic composition of carbon in carbon dioxide (δ13C of CO2

The Atlantic, the Amazon, and the Andes : neogene climate and tectonics viewed from Ceara Rise, western tropical Atlantic

Creator:: Harris, Sara E.
Resource Type:: Dissertation
Full Text:: Andes. Neogene Climate and Tectonics Viewed from Ceara Rise, Western Tropical Atlantic. by Sara E

Deglacial floods in the Beaufort Sea preceded Younger Dryas cooling

Creator:: Keigwin, L. D., Klotsko, S., Zhao, N., Reilly, B., Giosan, L., and Driscoll, N. W.
Abstract:: A period of cooling about 13,000 years ago interrupted about 2,000 years of deglacial warming. Known as the Younger Dryas (YD), the event is thought to have resulted from a slowdown of the Atlantic meridional overturning circulation in response to a sudden flood of Laurentide Ice Sheet meltwater that reached...
Resource Type:: Article
Full Text:: isotopes in this paper is δ18O, δ13C was measured and is reported in Supplementary Table 2. Note that the

Stable Isotope Constraints on Carbon Dioxide and Nitrous Oxide Variations at the Onset of the Last Glacial Period: New Ice Cores from Taylor Glacier, Antarctica

Creator:: Menking, James A.
Abstract:: New ice cores retrieved from the Taylor Glacier (Antarctica) blue ice area contain ice and air spanning the Marine Isotope Stage (MIS) 5/4 transition, a period of global cooling and ice sheet expansion. Chronologies were determined for the ice and air bubbles in the new ice cores by visually matching...
Resource Type:: Dissertation
Full Text:: . Carbon Isotope Constraints on the Deglacial CO2 Rise from Ice Cores. Science 336, 711-714

ScholarsArchive@OSU

Early deglacial Atlantic overturning decline and its role in atmospheric CO₂ rise inferred from carbon isotopes (δ¹³C)

The Global Overturning Circulation Since the Last Glacial Maximum Based on Marine Authigenic Neodymium Isotopes

The deglacial transition on the southeastern Alaska Margin: Meltwater input, sea level rise, marine productivity, and sedimentary anoxia

Last Century Warming Over the Canadian Atlantic Shelves Linked to Weak Atlantic Meridional Overturning Circulation

Abrupt deglacial climate changes in the North Pacific and implications for climate tipping points

Onset of deglacial warming in West Antarctica driven by local orbital forcing

Carbon cycle variability during the last millennium and last deglaciation

The Atlantic, the Amazon, and the Andes : neogene climate and tectonics viewed from Ceara Rise, western tropical Atlantic

Deglacial floods in the Beaufort Sea preceded Younger Dryas cooling

Stable Isotope Constraints on Carbon Dioxide and Nitrous Oxide Variations at the Onset of the Last Glacial Period: New Ice Cores from Taylor Glacier, Antarctica

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