Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3423705d&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 23, CiteID L23705
Physics
6
Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215), Oceanography: Physical: Planetary Waves, Global Change: Oceans (1616, 3305, 4215, 4513), Global Change: Climate Variability (1635, 3305, 3309, 4215, 4513)
Scientific paper
The nature of the Pacific Decadal Oscillation (PDO) is investigated based upon analyses of sea surface temperature observations over the last century. The PDO is suggested to be comprised of a 20 year quasi-periodic oscillation and a lower frequency component with a characteristic timescale of 60 years. The 20 year quasi-periodic oscillation is clearly identified as a phase locked signal at the eastern boundary of the Pacific basin, which could be interpreted as the signature of an ocean basin mode. We demonstrate that the 60 year component of the PDO is strongly time-lag correlated with the Atlantic Multidecadal Oscillation (AMO). On this timescale the AMO is shown to lead the PDO by approximately 13 years or to lag the PDO by 17 years. This relation suggests that the AMO and the 60 year component of the PDO are signatures of the same oscillation cycle.
D'Orgeville Marc
Peltier Richard W.
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