In recent years, the Chinese scientists have undertaken numerous researches on aerosol, and made many achievements. This paper reviews the above researches on aerosols which mainly focus on the follow-ing three aspects: the characteristics of aerosols, the effects on climate, and dust aerosol research. Present in-ternational research plans in relation to aerosols are briefly introduced. The important fields and trends of atmospheric aerosol researches in the near future are also pointed out and discussed. Key words Aerosol - China - Summary 1 This work is supported by NKBRSF Project (G1999043400)
The canopy stomatal movement, a plant physiological process, generally occurs within leaves but its influence on exchange of CO2, water vapor, and sensible heat fluxes between atmosphere and terrestrial ecosystem. Many studies have documented that the interaction between leaf photosynthesis and canopy stomatal conductance is obvious. Thus, information on stomatal conductance is valuable in climate and ecosystem models. In current study, a newly developed model was adopted to calculate canopy stomatal conductance of winter wheat in Huang-Huai-Hai (H-H-H) Plain of China (31.5 - 42.7°N, 110.0 - 123.0°E). The remote sensing information from NOAA-AVHRR and meteorological observed data were used to estimate regional scale stomatal conductance distribution. Canopy stomatal conductance distribution pattern of winter wheat on March 18, 1997 was also presented. The developed canopy stomatal conductance model might be used to estimate canopy stomatal conductance in land surface schemes and seems can be acted as a boundary condition in regional climatic model runs.
