名古屋大学グローバルCOEプログラム 地球学から基礎・臨床環境学への展開

BCES

セミナー

SELIS-GCOE合同セミナー
How Permafrost Hydrological Processes Affect Above Ground Vegetation Dynamics

スケジュール

2010年5月7日(金) 16:30-
環境総合館2階 第二会議室

講演者

Zhang Ningning (名古屋大学地球水循環研究センター)

問い合わせ

佐藤 永(sato.hisashi@nagoya-u.jp

詳細

Recent observed studies have shown that vegetation dynamics, including phenology (short term) and succession (long term), is highly related to seasonal soil freezing-melting hydrological processes over permafrost and seasonal frozen region e.g., in Siberia. As a result, it becomes a difficulty for modeling studies to simulate the vegetation dynamics coupled with soil moisture properly. In order to simulate those highly coupled interactions and to understand the vegetation dynamics which respond to the climate and soil hydrology inter-annual variation, a new dynamic vegetation model (DVM) has been developed. It is coupled with a frozen soil model (FSM) which comprehensively considers the soil seasonal hydrology processes.
The coupled model successfully reproduces vegetation composition and forest dynamics corresponding with soil freeze-melt processes. The results suggest that winter precipitation and soil ice is indispensable factor to maintain current forest dominated vegetation at Siberia, while forest composition is determined by many other factors such as permafrost existence, fire and so on.

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