Cyclic Variation and Solar Forcing of Holocene Climate in the Alaskan Subarctic

Author:

Hu Feng Sheng12345,Kaufman Darrell12345,Yoneji Sumiko12345,Nelson David12345,Shemesh Aldo12345,Huang Yongsong12345,Tian Jian12345,Bond Gerard12345,Clegg Benjamin12345,Brown Thomas12345

Affiliation:

1. Department of Plant Biology, University of Illinois, Urbana, IL 61801, USA.

2. Program in Ecology and Evolutionary Biology, University of Illinois, Urbana, IL 61801, USA.

3. Department of Geology, University of Illinois, Urbana, IL 61801, USA.

4. Departments of Geology and Environmental Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA.

5. Department of Environmental Sciences, The Weizmann Institute of Science, Rehovot 76100, Israel.

Abstract

High-resolution analyses of lake sediment from southwestern Alaska reveal cyclic variations in climate and ecosystems during the Holocene. These variations occurred with periodicities similar to those of solar activity and appear to be coherent with time series of the cosmogenic nuclides 14 C and 10 Be as well as North Atlantic drift ice. Our results imply that small variations in solar irradiance induced pronounced cyclic changes in northern high-latitude environments. They also provide evidence that centennial-scale shifts in the Holocene climate were similar between the subpolar regions of the North Atlantic and North Pacific, possibly because of Sun-ocean-climate linkages.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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