HR: 0830h
AN: OS21B-1122    [PDF]
TI: A Physically Consistent Long-term Reconstruction of the Northern Annular Mode Using Tree Rings
AU: * Wettstein, J J
EM: justinjw@atmos.washington.edu
AF: Joint Institute for the Study of Atmosphere and Ocean, University of Washington Box 354235, Seattle, WA 98195 United States
AU: Wallace, J M
EM: wallace@atmos.washington.edu
AF: Joint Institute for the Study of Atmosphere and Ocean, University of Washington Box 354235, Seattle, WA 98195 United States
AB: The Northern Annular Mode has a robust wintertime surface temperature signature that is used here to generate a physically plausible Northern Annular Mode reconstruction based on select tree species responsive to winter temperature. Ring width data from these species is shown to adequately record local temperature conditions in regions where the Northern Annular Mode surface temperature signal is especially strong. Cross-validated results for the reconstruction compare favorably with existing North Atlantic Oscillation reconstructions and are straightforward to physically interpret. Using other annually-resolved proxy data to extend this work may more clearly describe the evolution of Northern Hemisphere climate variability and imply physical constraints to the range of possible future climate outcomes.
DE: 1620 Climate dynamics (3309)
DE: 3309 Climatology (1620)
DE: 3322 Land/atmosphere interactions
DE: 3344 Paleoclimatology
DE: 4215 Climate and interannual variability (3309)
SC: Ocean Sciences [OS]
MN: 2003 Fall Meeting