复杂下垫面碳通量足迹分析——以上海市奉贤大学城为例

摘要

基于位于上海市奉贤大学城的通量观测塔,利用ART Footprint Tool分析了各个风向(东南、西北、东北、西南4个方位)的碳通量足迹.结果表明:各个风向上的贡献源区碳通量数值范围基本一致,均可以代表研究区的总体碳通量范围(0～18 μmol·m-2·s-1);碳通量贡献源区的通量峰值出现在东北方向(18 μmol·m-2·s-1),东北方向的总体碳通量水平较高,其碳通量贡献比值最高(全天共36%),原因是东北方向单位面积上建筑物较多且靠近交通主干线,人类活动较多导致碳通量贡献比值最高,其他方向上的碳通量贡献比值相差不大.该研究可以为其他城市的碳循环研究提供服务和参考.%On the basis of flux observation tower located in Fengxian university town of Shanghai,the carbon flux footprints in various wind directions including the southeast,northwest,northeast,and southwest directions were analyzed by utilizing the ART Footprint Tool.The conclusions are as follows:(1) The numerical range of carbon flux in the source area of each wind direction is basically the same,which can represent the total carbon flux range of the study area(0 ~18 μmol·m-2·s-1).The flux peak value in contribution source region of carbon flux appears in the northeast direction(18 μmol·m-2·s-1),the total carbon flux level is higher in the northeast direction;(2) The contribution ratio of the northeast direction to carbon flux is the highest in the four directions (36%).The reason is that human activities are more active in the northeast direction due to more buildings in unit area which are close to the main roads.The contribution ratios of the other three directions to carbon flux are not quite different.This research achievement can provide the reference for other cities' carbon cycle research.