[Energy balance and evapotranspiration in broad-leaved Korean pine forest in Changbai Mountains].

Based on the continuous measurements of an open-path eddy covariance system, this paper analyzed the characteristics of energy balance components and evapotranspiration in a broad-leaved Korean pine forest in Changbai Mountains in 2008, as well as the differences of energy balance components and evapotranspiration between growth season and dormant season. For the test forest, the year-round energy balance closure was 72%, being at a medium level, compared to the other studies in the Fluxnet community. The energy balance components had significant differences in their diurnal and seasonal variations. In growth season, turbulent energy exchange was dominated by upward latent heat flux, accounting for 66% of available energy; while in dormant season, the turbulent energy exchange was dominated by upward sensible heat flux, accounting for 63% of available energy. The accumulated annual evapotranspiration in the study site in 2008 was 484.7 mm, occupying 87% of the precipitation at the same time period (558.9 mm), which demonstrated that evapotranspiration was the main water loss item in temperate forests of northern China.

[Canopy interception in larch plantations: measurement and modeling in eastern Liaoning Mountainous Region].

Based on the 2005-2008 observation data of canopy interception in larch plantation in eastern Liaoning Province, and by using Gash model, the interception process was simulated. In the plantation, there was a significant positive correlation between throughfall and rainfall (R2 = 0.98), and the annual throughfall accounted for 77. 64% of the total rainfall. The canopy interception was positively correlated with rainfall and its intensity. The canopy interceptio simulated by Gash model was lower than the measured values, except for the results in 2007 because of the short intervals between rainfalls. The absolute error of simulated values had a negative exponential correlation with rainfall, and the range was 1.26%-68.96%, and the mean value was 29.09%. The estimated values were almost equal to the measured values, with the correlation coefficient being 0.91.