Yuan Zhang

Wind speed can affect the observation of canopy vegetation index. When the wind blows, plants will swing, and the spatial structure of the canopy will change. This change may affect the vegetation index measurements. Normalized Difference Vegetation Index (NDVI) from satellite remote sensing was chosen as the index to explore the influence of wind on canopy measurements for forest ecosystems. Our results show that wind speed has a positive influence on the measurements of NDVI on the whole. While for four main forest types: Deciduous Broadleaf Forests (DBF), Evergreen Broadleaf Forests (EBF), Evergreen Needleleaf Forests (ENF), Mixed Forests (MF), the performances are different, the corresponding value is 0.002, -0.004, 0.003, 0.001 when the wind speed increases by 1m. This effect has a negative to positive trend with the increase of latitude. This study provides a reference for the effect of wind speed on vegetation canopy structure measurements.