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Recent Warming Reverses Long-Term Arctic Cooling |
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Fig. 1. Locations of the proxy climate records included in the synthesis |
Recent Warming Reverses Long-Term Arctic Cooling
Science Vol. 325, No. 5945, pp. 1236-1239, 4 September 2009. Darrell S. Kaufman1, David P. Schneider2, Nicholas P. McKay3, Caspar M. Ammann2, Raymond S. Bradley4, Keith R. Briffa5, Gifford H. Miller6, Bette L. Otto-Bliesner2, Jonathan T. Overpeck3, Bo M. Vinther7, Arctic Lakes 2k Project Members8
1School of Earth Sciences and Environmental Sustainability, Northern Arizona University, Flagstaff, AZ 86011, USA.
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ABSTRACT: The temperature history of the first millennium C.E. is sparsely documented, especially in the Arctic. We present a synthesis of decadally resolved proxy temperature records from poleward of 60°N covering the past 2000 years, which indicates that a pervasive cooling in progress 2000 years ago continued through the Middle Ages and into the Little Ice Age. A 2000-year transient climate simulation with the Community Climate System Model shows the same temperature sensitivity to changes in insolation as does our proxy reconstruction, supporting the inference that this long-term trend was caused by the steady orbitally driven reduction in summer insolation. The cooling trend was reversed during the 20th century, with four of the five warmest decades of our 2000-year-long reconstruction occurring between 1950 and 2000. |
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Download data from the WDC Paleo archive: 2,000 Year Decadal Scale Arctic Temperature Synthesis, Text or Excel format. |
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To read or view the full study, please visit the Science website. It was published in Science, Vol. 325, No. 5945, pp. 1236-1239, 4 September 2009. DOI: 10.1126/science.1173983 Additional information and updates to the Arctic 2K Synthesis can be found on the Arctic Research Consortium of the U.S. (ARCUS) website. |
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http://www.ncdc.noaa.gov/paleo/pubs/kaufman2009/kaufman2009.html Downloaded Thursday, 01-Aug-2013 11:44:49 EDT Last Updated Wednesday, 28-Oct-2009 09:19:54 EDT by paleo@noaa.gov Please see the Paleoclimatology Contact Page or the NCDC Contact Page if you have questions or comments. |