Climate Response of Oxygen Isotopic Compositions in Tree-Ring Cellulose in Java: Evaluation Using a Proxy System Model

Tree-ring cellulose oxygen isotopic composition (δ18O) is controlled by several hydrological factors such as precipitation, relative humidity, and temperature. A proxy system model can reveal how these affect tree-ring δ18O. In this study, to identify a key control on δ18O variations, we performed calculation of year-to year variation Javanese teak in Indonesia from 1960 1998. Our results reasonably reproduce the observed values their temporal variations (r = 0.6; p < 0.001). Moreover, sensitivity test shows that are sensitive growing period. The simulation result with earlier or later shifts period captured amplitude over 39 years. These indicate might be influenced subtle shift intra-annual