利用涡度相关观测系统，连续监测2013年安吉毛竹林生态系统二氧化碳通量及其相关因子的变化，应用 FSAM模型，分析不同大气条件、不同风向下通量贡献区的分布及其随时间的变化。结果表明：通量贡献区范围在各风向均随大气稳定程度的增加而增加。在稳定的大气条件下，通量贡献区范围显著大于不稳定大气条件；大气稳定与不稳定条件下各风向源区的水平范围分别为205.09～2176.92 m 和72.56～709.39 m，横向范围分别为802.36～883.16 m 和337.92～392.84 m；不同时间贡献区大小也有不同。通量贡献区93.05％的信息来源于观测塔东南、东北、西北3个方向，比例分别为37.45％、27.43％与28.17％。
Research of Flux Footprint of Anji Bamboo Forest Ecosystems Based on the FSAM Model
Using the eddy covariance observation systems,continuous data of carbon fluxes and related factors in Anji Bamboo ecosystem was captured in 2013.The flux contribution area and its temporal dynamics was analyzed under different atmospheric conditions and different wind directions with FSAM(Flux Source Area Model).The re-sults showed that:the range of flux source areas increased with the atmospheric stability.Under stable air condi-tion,the range of flux source areas was significantly larger than under the unstable air condition.The horizontal range and the longitudinal range were 205.09 -2 176.92 m and 802.36 -883.16 m,72.56 -709.39 m and 337.92 -392.84 m under those two air conditions in all directions,respectively.The range of flux source areas al-so changed with the seasons with no rules.About 93.05% of flux came from the southeast,northeast and northwest of the tower,the ratio were 37.45%,27.43% and 28.17%,respectively.
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