17:15 〜 18:30
[ACG39-P08] Vulnerability and resilience of tree radial growth over eastern Siberia under climate changes
キーワード：気候変動、東シベリア、樹木年輪、脆弱性、回復力
Global warming alters not only long term trend of temperature and precipitation, but also the frequency and intensity of extreme weathers. These changes possibly affect forest ecosystems, and in some cases the ecosystems may be adversely affected. In order to maintain diverse functions of forest ecosystems (ecosystem services) in the future, the effect of global warming/climate changes on forest ecosystems should be fully understand. However, it has not been yet obtained.
In this study, we focus on forest ecosystems over Eastern Siberia. Although these ecosystems are considered crucial to the climate system and global carbon cycle and are particularly vulnerable to climate changes, in-site observations are quite limited. We therefore evaluate the response of tree growth to climate changes over past decades in Taiga forest sites (Yakutsk: 62N 129E, and Elgeeii: 60N 133E), and a Taiga-Tundra boundary ecosystem (Chokurdakha: 70N 147E) over the region. Especially, we focus on the extreme events that show remarkable decline in tree growth, their frequency and the recovery process of tree growth from the decline events, i.e., resilience. In this presentation, I would like to report the preliminary results.
In this study, we focus on forest ecosystems over Eastern Siberia. Although these ecosystems are considered crucial to the climate system and global carbon cycle and are particularly vulnerable to climate changes, in-site observations are quite limited. We therefore evaluate the response of tree growth to climate changes over past decades in Taiga forest sites (Yakutsk: 62N 129E, and Elgeeii: 60N 133E), and a Taiga-Tundra boundary ecosystem (Chokurdakha: 70N 147E) over the region. Especially, we focus on the extreme events that show remarkable decline in tree growth, their frequency and the recovery process of tree growth from the decline events, i.e., resilience. In this presentation, I would like to report the preliminary results.