Footprint analysis on carbon flux of complex underlying surface——A case study of Shanghai Fengxian University Town

• Main Authors: Gong Yuan, Zhao Min, Guo Zhijuan, Yao Xin, He Yi, Zhang Liping
• Format: Article
• Language: English
• Published: Academic Journals Center of Shanghai Normal University 2017-04-01
• Series: Journal of Shanghai Normal University (Natural Sciences)
• Subjects: urban system; eddy covariance; carbon flux; footprint
• Online Access: http://qktg.shnu.edu.cn/zrb/shsfqkszrb/ch/reader/view_abstract.aspx?file_no=20170218&flag=1

On the basis of flux observation tower located inFengxian 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.