Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112205g&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 12, CiteID L12205
Physics
66
Global Change: Climate Dynamics (3309), Global Change: Oceans (4203), Meteorology And Atmospheric Dynamics: Paleoclimatology, Oceanography: General: Dendrochronology, Oceanography: General: Ocean Prediction
Scientific paper
We present a tree-ring based reconstruction of the Atlantic Multidecadal Oscillation (AMO) which demonstrates that strong, low-frequency (60-100 yr) variability in basin-wide (0-70°N) sea surface temperatures (SSTs) has been a consistent feature of North Atlantic climate for the past five centuries. Intervention analysis of reconstructed AMO indicates that 20th century modes were similar to those in the preceding ~350 yr, and wavelet spectra show robust multidecadal oscillations throughout the reconstruction. Though the exact relationships between low-frequency SST modes, higher frequency (~7-25 yr) atmospheric modes (e.g., North Atlantic Oscillation/Arctic Oscillation), and terrestrial climates must still be resolved, our results confirm that the AMO should be considered in assessments of past and future Northern Hemisphere climates.
Betancourt Julio L.
Graumlich Lisa J.
Gray Stephen T.
Pederson Gregory T.
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