HR: 1340h
AN: A53B-0882    [Abstracts]
TI: Regional Reconstruction of the Palmer Drought Series Indices and Precipitation in the North Aegean and Northwestern Turkey From an Oak Tree-Ring Chronology, AD 1169-1985
AU: * Griggs, C B
EM: cbg4@cornell.edu
AF: Earth and Atmospheric Sciences, Cornell University, 2120 Snee Hall, Ithaca, NY 14853 United States
AU: Kuniholm, P I
EM: pik3@cornell.edu
AF: The Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell University, B48 Goldwin Smith Hall, Ithaca, NY 14853 United States
AU: Newton, M W
EM: maryanne@dendro.mail.cornell.edu
AF: The Malcolm and Carolyn Wiener Laboratory for Aegean and Near Eastern Dendrochronology, Cornell University, B48 Goldwin Smith Hall, Ithaca, NY 14853 United States
AU: DeGaetano, A T
EM: atd2@cornell.edu
AF: Earth and Atmospheric Sciences, Cornell University, 1115 Bradfield Hall, Ithaca, NY 14853 United States
AB: In the Mediterranean region of northeastern Greece and northwestern Turkey, securely-dated oak tree-ring chronologies of historic buildings extend modern oak forest chronologies back into the 11th century AD. The secure cross-dating of the building and forest chronologies indicates the presence of a common signal. The climate parameters of that signal are the precipitation of April-May-June from the year-of-growth and the previous year, and the Palmer Drought Series Indices (PDSI), a meteorological drought index, of the growing months in that region. The North Atlantic Oscillation (NAO) index of April also correlates significantly with the tree-ring chronology and with the April-May-June PDSI in this region. Using Principal Component Analysis, the precipitation and PDSI parameters are here reconstructed from AD 1169 to 1985, with comparisons to other precipitation reconstructions of tree-ring sequences from this region. The regional reconstruction indicates a drier period to the end of the Medieval Warm Period ca.AD 1350, and a fluctuating pattern during the Little Ice Age, ca.1350-1900. The early 20th century reconstruction shows a slightly drier period, then the tree-ring patterns of the last 40 years indicate a possible discontinuity of the normal precipitation-cambial growth relationship possibly due to the effect of the current global warming trend on tree-ring growth in this region.
DE: 3354 Precipitation (1854)
DE: 4215 Climate and interannual variability (3309)
DE: 1655 Water cycles (1836)
DE: 1803 Anthropogenic effects
DE: 1630 Impact phenomena
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting