Dendroclimatic Reconstruction of Summer Temperature at the Akaishi Mountains since A.D. 1774
Year: 2019
Type: article
Abstract: Ring width, maximum density, and δ18O chronologies of Tsuga diversifolia and Picea jezoensis var. hondoensis growing in a sub-alpine forest at Mt. Senjo in the Akaishi Mountains were developed. Ring width and maximum density were measured with X-ray densitometry. Tree-ring δ18O was measured using a mass spectrometer after cellulose extraction. The chronologies developed have significant positive correlations with monthly temperatures in July, August, and September, with the exception of the ring width of T. diversifolia. The transfer functions for July-September temperature were developed using the four chronologies and were verified statistically. The transfer functions reveal a high coefficient of determination, whereas statistical verifications were not successful with rather low RE, CE, and sign test. The estimated temperatures since 1774 partially agreed with reported climate changes based on historical records. The results indicate that estimated temperature is weak for reconstructing increasing trends and low-frequency variations of temperature, although it is potentially useful for higher frequency temperature changes in local areas.
Authors: Koh YASUE, Noriko KUBO, Mikiko AKAO, Masaki SANO, Takeshi NAKATSUKA
Language: English
Topic: Tree-ring climate responses
Subfield: Atmospheric Science
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Climate action
Open Access status: diamond
Awards: Developing a network of tree-ring oxygen isotope chronologies over Japan, Korea and Taiwan, for precisely dating archeological woods, Integrating paleoclimate data with rice yields estimated from historical documents during the early modern period in Japan, Reorganization of prehistorical structure of calendar age and evaluation of climate change effect in Japanese archipelago using tree ring oxygen isotope ratios, Elevation-dependent climate changes in the Nepal Himalaya as reconstructed from tree rings and ice cores
OpenAlex ID: W2932429449