Intra-Annual Isotope Records from Japanese Cedar Tree Samples in Akita Prefecture

Abstract

Tree-ring width, density, and isotopic data can be used for paleoclimate reconstruction. Recently, due to the advantage of being less affected by tree physiological factors, the use of tree-ring cellulose isotope ratios in paleoclimate reconstruction has become a new research focus. Specifically, intra-annual isotope ratios have shown high-resolution potential for paleoclimate reconstruction, with feasibility demonstrated in multiple studies in central Japan. However, such high-resolution paleoclimate reconstruction studies in the relatively high-latitude region of northern Japan are still relatively scarce. Therefore, in this study, we collected tree-ring samples from northern Japan to explore whether the same reconstruction methods are applicable to this colder climate region.