利用崇明东滩湿地所建造的通量观测塔,连续监测了2006年生态系统的二氧化碳通量及其相关因子的变化.利用FSAM(Flux Source Area Model)模型,并结合地面测定,对湿地生态系统碳通量贡献区进行了分析.发现通量贡献区范围在各风向均随大气稳定程度的增加而拉长.在稳定的大气条件下,非主风方向上的通量贡献区范围要显著大于主风方向上的通量贡献区,但在非稳定大气条件下,两者相差不大.由FSAM模型所估测的通量贡献区范围表明:所测的碳通量数据可以较好地反映下垫面的通量信息.
Footprint Analysis for Carbon Flux in the Wetland Ecosystem of Chongming Dongtan
The ecosystem flux of Carbon Dioxide and relevant factors have been measured continuously at Chongming Dongtan wetlands in 2006. Based on the data from observation- tower. The footprint of carbon flux in the wetland ecosystem was analyzed by using FSAM (flux source area model). The result indicated that the range of flux footprint increased with the increase of atmospheric stability of upwind area. Moreover, under stable conditions, the range of footprint in unpre- vailing wind directions was larger than that of the prevailing wind direction, but there was little difference between them under non-stable conditions. As the range of footprint calculated by FSAM can reflect the information around the study site, this result confirmed that our carbon dioxide flux data adequately revealed the characteristics of surface flux into e- cosystem.
NETL
NSTL
万方数据
维普
