| 摘 要： | Based on four tree-ring chronologies which was analyscd with appropriate collection and accurate datingin the middle Tibetan Plateau,an essential procedure on reconstruction of past climate has been pointed outin this paper.First,the response function of each dendrochronology has been built and used to estimate howring-width growth responds to variations in monthly climatic change.Second,the climate factors which couldbe produced with different tree-ring series have been selected.Then,the transfer function equation,includinga new set of orthogonal variables,can be used to reconstruct local past temperature or precipitation.Itshould be emphasized that prior growth has been considered in the relationship between climate factor andtree-ring chronology,Besides,some different periods for calibration and verification have been divided.Andsome statistics and other kinds of proxy data have been adopted as test approaches.As a result,the variationsof air temperature during the last 600 years and precipitation during the last 340 years were reconstructedby combining the same types of tree-ring series in the middle Tibet.
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