Connotea
CiteULike
del.ico.us
BibSonomyAbstract
Timing of abrupt climate change: A precise clock
Potsdam Institute for Climate Impact Research, Potsdam, Germany
Many paleoclimatic data reveal a ∼1,500 year cyclicity of unknown origin. A crucial question is how stable and regular this cycle is. An analysis of the GISP2 ice core record from Greenland reveals that abrupt climate events appear to be paced by a 1,470-year cycle with a period that is probably stable to within a few percent; with 95% confidence the period is maintained to better than 12% over at least 23 cycles. This highly precise clock points to an origin outside the Earth system; oscillatory modes within the Earth system can be expected to be far more irregular in period.
Received 12 February 2003; accepted 10 April 2003; published 21 May 2003.
Citation: (2003), Timing of abrupt climate change: A precise clock, Geophys. Res. Lett., 30(10), 1510, doi:10.1029/2003GL017115.
Cited By