East central North America climates during marine isotope stages 3–5

Long‐term, high‐resolution stalagmite carbon and oxygen isotope records from eastern North America (ENA) provide a midlatitude history of relative changes in moisture availability and climate states during the last interglacial and glacial inception (127.7 to 41.6 ka before present). The West Virginia carbon record shows low‐amplitude variability at orbital time scales, superimposed on a long‐term asymmetric pattern similar to global sea level changes. Relative moisture availability peaked at ~114 ka, and following a brief dry interval at ~96 ka, moisture availability gradually decreased. The almost linear change in moisture availability over ENA may reflect gradual changes in midlatitude zonal circulation as the polar cell and Laurentide Ice Sheet expanded or decreased. In contrast, our oxygen record is precession modulated and in phase with spring insolation, perhaps due to changes in precipitation seasonality. The separate pacings by eccentricity (carbon) and precession (oxygen) expose an underlying complexity that will be a challenge to explain.

[1]  S. Burns,et al.  Climatic backdrop to the terminal Pleistocene extinction of North American mammals , 2012 .

[2]  N. Glasser,et al.  North American Ice Sheet build-up during the last glacial cycle, 115–21 kyr , 2010 .

[3]  Gregory S. Springer,et al.  The seasonality of east central North American precipitation based on three coeval Holocene speleothems from southern West Virginia , 2010 .

[4]  S. Burns,et al.  Variable winter moisture in the southwestern United States linked to rapid glacial climate shifts , 2010 .

[5]  J. Welker,et al.  The influence of air mass source on the seasonal isotopic composition of precipitation, eastern USA , 2009 .

[6]  M. Raymo,et al.  Atlantic overturning responses to Late Pleistocene climate forcings , 2008, Nature.

[7]  Gregory S. Springer,et al.  Solar forcing of Holocene droughts in a stalagmite record from West Virginia in east‐central North America , 2008 .

[8]  Martin Ziegler,et al.  Interacting Loop Current variability and Mississippi River discharge over the past 400 kyr , 2008 .

[9]  Xiaohua Shao,et al.  Millennial- and orbital-scale changes in the East Asian monsoon over the past 224,000 years , 2008, Nature.

[10]  J. A. Dorale,et al.  Episodes of late Holocene aridity recorded by stalagmites from Devil's icebox Cave, Central Missouri, USA , 2007, Quaternary Research.

[11]  S. Goldstein,et al.  A radiometric calibration of the SPECMAP timescale , 2006 .

[12]  David A. Richards,et al.  Chronology and paleoenvironment of Marine Isotope Stage 3 from two high-elevation speleothems, Austrian Alps☆ , 2006 .

[13]  Andy Baker,et al.  University of Birmingham Modification and preservation of environmental signals in speleothems , 2005 .

[14]  A. Baker,et al.  Biomass effects on stalagmite growth and isotope ratios: A 20th century analogue from Wiltshire, England , 2005 .

[15]  C. Spötl,et al.  High-precision constraints on timing of Alpine warm periods during the middle to late Pleistocene using speleothem growth periods , 2005 .

[16]  Mathias Vuille,et al.  Insolation-driven changes in atmospheric circulation over the past 116,000 years in subtropical Brazil , 2005, Nature.

[17]  J Schwander,et al.  High-resolution record of Northern Hemisphere climate extending into the last interglacial period , 2004, Nature.

[18]  R. Edwards,et al.  Timing, Duration, and Transitions of the Last Interglacial Asian Monsoon , 2004, Science.

[19]  Michael A. Palecki,et al.  Pacific and Atlantic Ocean influences on multidecadal drought frequency in the United States , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[20]  S. Hemming,et al.  Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint , 2004 .

[21]  R. L. Edwards,et al.  A High-Resolution Absolute-Dated Late Pleistocene Monsoon Record from Hulu Cave, China , 2001, Science.

[22]  Peter U. Clark,et al.  Ice sheets and sea level of the Last Glacial Maximum , 2001 .

[23]  J. Laskar,et al.  Orbital, precessional, and insolation quantities for the earth from -20 Myr to +10 Myr. , 1993 .