The alpine meadow is widely distributed on the Tibetan Plateau, covering about 1.2 million km~2. At the Damxung Grassland Station, located in the hinterland of the plateau 15 the place covered with this typical vegetation.The continuous carbon flux (from August to middle October, 2003) of the alpine meadow was measured using the open-path eddy covariance systems in order to analyze the diurnal variation patterns of net ecosystem carbon dioxide exchange (NEE) and its relationship with environmental factors, ...