Summer temperature variations in southern Kamchatka as reconstructed from a 247-year tree-ring chronology of <Emphasis Type="Italic">Betula ermanii</Emphasis> |
| |
| Authors: | Masaki Sano Fumito Furuta Tatsuo Sweda |
| |
| Institution: | (1) United Graduate School of Agricultural Sciences, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan;(2) Present address: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan |
| |
| Abstract: | We have developed a 247-year ring-width chronology of Betura ermanii Cham. growing in an open canopy forest close to the tree line at a coastal site in southern Kamchatka. Climatic response
analyses revealed that the ring width was primarily controlled by July–August temperature. The regression models that we used
for statistical reconstruction passed the stringent calibration–verification tests used in dendroclimatology, resulting in
the first quality-controlled tree-ring reconstruction for southern Kamchatka. The reconstructed temperature shows a cool period
from the 1830s to the 1880s, followed by gradual warming until ca. 1940, then a cooling trend extending to the 1970s, and
finally a warming trend continuing to the present. Spatial correlation analyses with sea surface temperature in the North
Pacific indicated that the seas surrounding the Kamchatka peninsula play a role in modulating temperature variations in the
study area whereas the effects of the Pacific Decadal Oscillation are relatively weak. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
