Abstracts for the 5th International GAME Conf.

3-5 October 2001

Aichi Trade Center

Nagoya Japan

The relation among vegetation, soil moisture and seasonal variation of evapotranspiration over Mongolia

Shin Miyazaki (1), Tadashi Miyamoto (1), Ichiro Kaihotsu (3), Tetsuzo Yasunari (4), Gambo Davaa (5), Dambarajaa Oyunbaatar (5), Luvsan Natsagdorj (5)

According to previous studies, Mongolia plays important roles on seasonal climate change in East Asia, and here is the one of the most remarkable warming region in the world. It is very important for considering these reason to clarify the land-atmosphere interaction. However it is still unknown to the quantitative study in these area. In this study we focused to estimate the seasonal variation of evapotranspiration (E) responded to the change of vegetation and soil moisture quantitatively, which we used the data observed data over typical grassland at Arvaikheer (46.27N, 102.78E) in Mongolia from 1999 to 2000. There was clear different feature of its relation between both years. The E in 1999 was twice of its in 2000, while the LAI (Leaf Area Index) in 1999 showed twice value of its in 2000. Although the annual precipitation in these two years was about 160 mm, the precipitation from May to July was 83.3 mm and 57 mm in 1999 and 2000, respectively. In 1999 the rainfall occurred continuously in this period, while it rained intermittently in 2000. The stored soil moisture was 14 mm and -5 mm in 1999 and 2000, respectively. Soil surface temperature in 2000 was about 10 degrees higher than its in 1999. These phenomena suggest that the lack of stored soil moisture caused the poor growth of vegetation and the small amount of E from the surface.

Submittal Information

Name : Date :
    Shin Miyazaki
    31-May-01-16:18:27
Organization : Theme :
    Terrestrial Environment Research Center, University of Tsukuba
    Theme 1
Address : Presentation :
    Terrestrial Environment Research Center, University of Tsukuba 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577
    Poster or oral
Country : Abstract ID :
    Japan
    T1SM31May01161827
Phone : Fax :
    +81-298-53-2534
    +81-53-2530
E-mail :
    shin@erc2.suiri.tsukuba.ac.jp