HR: 1340h
AN: U43A-0741    [Abstracts]
TI: On The Possible Regional Distribution Of Ca 2.4 Kyr Climatic Cycle
AU: Ogurtsov, M G
EM: maxim.ogurtsov@mail.ioffe.ru
AF: A.F. Ioffe Physico-Technical Institute, Polytechnicheskaya 26, Russia, St.-Petersburg, 194021 Russian Federation
AU: Lindholm, M
EM: lindholm@joyx.joensuu.fi
AF: Saima Centre for Environmental Sciences, Linnankatu 11,Finland, Savonlinna,, FIN-57130, Finland
AU: Helama, S
EM: helama@cc.helsinki.fi
AF: University of Helsinki, P.O. Box 11,Gustaf Hallstrominkatu 2, Finland, Helsinki, FIN-00014 Finland
AU: Eronen, M
EM: matti.eronen@helsinki.fi
AF: University of Helsinki, P.O. Box 11,Gustaf Hallstrominkatu 2, Finland, Helsinki, FIN-00014 Finland
AU: * Raspopov, O M
EM: oleg@or6074.spb.edu
AF: SPbF IZMIRAN, P.O. Box 188, Muchnoy per.2, Russia, St.Petersburg, 191023 Russian Federation
AU: Dergachev, V A
EM: v.dergachev@pop.ioffe.rssi.ru
AF: A.F. Ioffe Physico-Technical Institute, Polytechnicheskaya 26, Russia, St.-Petersburg, 194021 Russian Federation
AB: A tree-ring proxy of summer temperature anomalies for northern Finland for the last 7500 years was analysed using both the Fourier and wavelet approaches. A distinct ca 2.0 Kyr periodicity was found in this temperature proxy. This variation is likely a manifestation of 2.0-2.5 Kyr Hallstattzeit cycle, present in many climatic records. Analysis showed that the Hallstattzeit climatic variation (period 2.0-2.5 Kyr) probably is not a global, common rhythm but has a spatial distribution. The origin and cause of this quasi 2.4 Kyr cycle is still unknown, however, some evidence of its possible connection with atmospheric dynamics were obtained
DE: 3344 Paleoclimatology
DE: 2162 Solar cycle variations (7536)
DE: 1610 Atmosphere (0315, 0325)
DE: 1620 Climate dynamics (3309)
DE: 1650 Solar variability
SC: Union [U]
MN: 2004 AGU Fall Meeting