Study on the Seasonal Dynamic of Net Ecosystem Exchange over a Poplar Plantation of Yueyang City in Hu’nan Province The diurnal trends of sensible and latent heat fluxes of a subtropical evergreen coniferous plantation subjected to seasonal drought Ecosystem and soil respiration of a poplar plantation on a sandy floodplain in Northern China EXAMINATION OF SOURCE AREA IN-FLUX MEASUREMENTS AT THE MID-SUBTROPICAL FOREST REGION Study on Surface Energy Balance Closure of a Coniferous Forest Plantation in Red Earth Hilly Area, China——Take Qianyanzhou, Taihe County, Jiangxi Province as an example Seasonal characteristics of CO2 fluxes above urban green space in the Pearl River Delta, China