Mathematics – Logic
Scientific paper
Feb 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012georl..3904707n&link_type=abstract
Geophysical Research Letters, Volume 39, Issue 4, CiteID L04707
Mathematics
Logic
Biogeosciences: Biomolecular And Chemical Tracers, Biogeosciences: Wetlands (1890), Geochemistry: Organic And Biogenic Geochemistry, Paleoceanography: Abrupt/Rapid Climate Change (1605), Paleoceanography: Continental Climate Records
Scientific paper
Dramatic hydrological fluctuations strongly impact human society, but the driving mechanisms for these changes are unclear. One suggested driver is solar variability, but supporting paleoclimate evidence is lacking. Therefore, long, continuous, high-resolution records from strategic locations are crucial for resolving the scientific debate regarding sensitivity of climate to solar forcing. We present a 6800-year, decadally-resolved biomarker and multidecadally-resolved hydrogen isotope record of hydroclimate from a coastal Maine peatland, The Great Heath (TGH). Regional moisture balance responds strongly and consistently to solar forcing at centennial to millennial timescales, with solar minima concurrent with wet conditions. We propose that the Arctic/North Atlantic Oscillation (AO/NAO) can amplify small solar fluctuations, producing the reconstructed hydrological variations. The Sun may be entering a weak phase, analogous to the Maunder minimum, which could lead to more frequent flooding in the northeastern US at this multidecadal timescale.
Huang Yongsong
Nichols Jonathan E.
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