学术活动

LASG & RCE-TEA联合报告



Vegetation and Soil Hydrological Process in Boreal Region Simulated by
a Dynamic Vegetation Model

Dr. Ningning Zhang
Hydrospheric Atmospheric Research Center, Nagoya University, Japan

2010年4月23日(星期五)10:30
研究生公寓一楼会议室

Abstract

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.

附件下载: