HR: 16:30h
AN: PP54A-03    [Abstracts]
TI: Divergent tree growth along the North East Pacific Rim
AU: * Laxton, S C
EM: laxtonsc@email.uc.edu
AF: University of Cincinnati, Department of Geology, 500 Geology/Physics Building, Cincinnati, OH 45221, United States
AU: Wiles, G C
EM: gwiles@wooster.edu
AF: The College of Wooster, 944 College Mall, Scovel Hall, Wooster, OH 44691, United States
AU: Trutko, A
EM: atrutko08@wooster.edu
AF: The College of Wooster, 944 College Mall, Scovel Hall, Wooster, OH 44691, United States
AU: Lowell, T V
EM: thomas.lowell@uc.edu
AF: University of Cincinnati, Department of Geology, 500 Geology/Physics Building, Cincinnati, OH 45221, United States
AU: Lawson, D E
EM: daniel.e.lawson@erdc.usace.army.mil
AF: Dartmouth College, 6017 Fairchild, Hanover, NH 03755, United States
AB: Tree growth along the northeast Pacific rim makes up a significant portion of carbon uptake and better understanding the relationship between possible divergent tree-growth and warming temperatures is important for the estimation of future carbon budgets. We review previous reports of divergence in the coastal and near-coastal north Pacific region and focus on key sites where treeline, ring-width series are known to have decreased over the past several decades. Preliminary results examining the spatial pattern of divergence along the North Pacific rim suggest that regions of most significant winter/ spring warming correspond with decreases in tree growth. How this warming is linked to decreased growth at and within a stand of trees is uncertain, but may be related to changes in precipitation and shifts in growing seasons. Clusters of ring-width sites within individual fiords show divergence, while others only kilometers away do not. Examination of these relatively local differences and larger, North Pacific wide spatial mapping of divergence may help in identifying the possible causes. A new collection of tree-ring series from central coastal Alaska, from the Alaskan panhandle and examination of sites from British Columbia along with updating at key sites will be presented along with analyses and discussion of potential drivers of observed changes in tree growth.
DE: 1600 GLOBAL CHANGE
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 3344 Paleoclimatology (0473, 4900)
DE: 4920 Dendrochronology
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2007 Fall Meeting