Distribution and characteristics of flux footprint of coniferous and broad-leaved mixed forest ecosystem in Fengyang Mountain of Zhejiang, China

The flux observation based on the vorticity-related technology requires the underlying surface to be uniform, but in actual observations, the terrain is often very complicated. Especially in the hilly and mountainous areas covered by forest vegetation, the spatial distribution of different vegetation types in the area Carbon flux observations have a great impact. This study uses the Kljun model and the ART Footprint Tool to analyze the observation data of the coniferous and broad-leaved mixed forest ecosystem in Fengyang Mountain, Zhejiang Province in 2017, and explore the vorticity-related system in the region in different seasons. The changes in the flux source area under different atmospheric stability conditions. The results show that the northeast wind (0-90°) and the southwest wind (180-270.) The distribution of the source area of ​​the amount is also mainly in the northeast and southwest; when the flux contribution rate reaches 90%, the source area length does not exceed 7000m, and when the flux contri