An ensemble weighting approach for dendroclimatology: drought reconstructions for the northeastern Tibetan Plateau.

ABSTRACT: Traditional detrending methods assign equal mean value to all tree-ring series for chronology developments, despite that the mean annual growth changes in different time periods. We find that the strength of a tree-ring model can be improved by giving more weights to tree-ring series that have a stronger climate signal and less weight to series that have a weaker signal. We thus present an ensemble weighting method to mitigate these potential biases and to more accurately extract the climate signals in dendroclimatology studies. This new method has been used to develop the first annual precipitation reconstruction (previous August to current July) at the Songmingyan Mountain and to recalculate the tree-ring chronology from Shenge site in Dulan area in northeastern Tibetan Plateau (TP), a m

SUBMITTER: Fang K 

PROVIDER: S-EPMC3908956 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature