Abstracts for the 6th International GAME Conf.
3-5 December 2004
Kyoto Japan
Surface energy flux at Amdo in the Tibetan Plateau.
Tanaka, Kenji (1), Ishikawa, Hirohiko (2), Ma, Yaoming (3), Hu, Zeyong (3)
(1) Department of Architecture and Civil Engineering,
(2) Disaster Prevention Research Institute (DPRI), Kyoto
(3) Cold and Arid Regions Environmental Engineering Research
Surface energy fluxes of the eastern Tibetan Plateau was
evaluated using the GAME-Tibet and CAMP-Tibet ground-based observation
data for over 5 years from 1998 to 2003. The bulk transfer coefficient
of the sensible heat was determined using turbulent observation and the
profile observation conducted during the GAME-Tibet IOP. In the unstable
condition, a 2/3 power function with the bulk Richardson number was
obtained for the coefficient of the sensible heat transfer. The latent
heat flux is computed assuing that the surface energy balance. An annual
cycle of the sensible heat flux and the latent heat flux is clearly
seen. Most of the net radiation is shared to the sensible heat flux from
the autumn to next spring. The latent heat flux begin to increase in May
and becomes dominant during the summer monsoon season. The bowen ratio
decreases less than 0.2 during the summer monsoon. The precipitation and
the specific humidity during summer monsoon can also be important in the
latent heat. The 1998 summer monsoon was rather dry in recent five
years. The total evaporation during the monsoon season estimated to 240
mm, less than 60 % of other years. A precipitation during the
pre-monsoon period gives the impacts on the surface energy fluxes.
Submittal Information
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Department of Architecture and Civil Engineering, | |
| Address : | Presentation : |
Kurokami 2-39-1, Kumamoto 464-8601 | |
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| E-mail : | |
ktanaka@gpo.kumamoto-u.ac.jp | |