@article{e08bd5ccd7714a22a8a8dadba6926bc2,
title = "A 180-year-long isotopic record of tree-ring cellulose on Okinawa Island, Japan",
abstract = " The oxygen isotope ratio (d 18 O) of tree-ring cellulose provides a valuable climatic record with an annual timescale. In Japan, the cellulose d 18 O records have been accumulated over the past decade. However, no long-term records have been reported for the southern subtropical island, Okinawa-jima, where many long-lived trees were burned during the Second World War and have been periodically damaged by typhoons. Here, we show a cellulose d 18 O of Ryukyu Pine (Pinus luchuensis Mayr.) from the Okinawa-jima island. This d 18 O data, which was obtained from a tree-disk preserved in a University Museum, cover a 95-year period before meteorological observation began on this island in 1891. The cellulose d 18 O variations negatively correlate with the amount of precipitation during the rainy season, suggesting that the cellulose d 18 O values are largely affected by d 18 O of rainwater rather than large scale ENSO variations. ",
keywords = "Monsoon, Okinawa, Oxygen isotope, Paleo climate, Tree-ring",
author = "Ryu Uemura and Miki Uemura and Masaki Sano and Takeshi Nakatsuka",
note = "Funding Information: We thank Takeshi Sasaki (University Museum Fujukan, University of the Ryukyus), the Forest Owners{\textquoteright} Co-operative Association of Kunigami, and tourism Center Kunigami for providing the tree-ring sampling. We also thank Kenjiro Sho for discussion. This research was supported by the Sasakawa Scientific Research Grant and the Research Institute for Humanity and Nature (RIHN: a constituent member of NIHU) Project No. 14200077 (Historical Climate Adaptation Project). This research was also supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (23242047 and 26244049). Funding Information: Acknowledgments—We thank Takeshi Sasaki (University Museum Fujukan, University of the Ryukyus), the Forest Owners{\textquoteright} Co-operative Association of Kunigami, and tourism Center Kunigami for providing the tree-ring sampling. We also thank Kenjiro Sho for discussion. This research was supported by the Sasakawa Scientific Research Grant and the Research Institute for Humanity and Nature (RIHN: a constituent member of NIHU) Project No. 14200077 (Historical Climate Adaptation Project). This research was also supported by Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (23242047 and 26244049). Publisher Copyright: Copyright {\textcopyright} 2018 by The Geochemical Society of Japan.",
year = "2018",
doi = "10.2343/geochemj.2.0543",
language = "English",
volume = "52",
pages = "E21--E27",
journal = "GEOCHEMICAL JOURNAL",
issn = "0016-7002",
publisher = "The Physiological Society of Japan",
number = "6",
}