Temporal and Spatial Distribution Characteristics of Atmospheric Greenhouse Gas(GHGs)Concentrations near the Surface of Chaohu Lake
To explore the temporal and spatial variation characteristics and influencing factors of the concentra-tions of atmospheric greenhouse gases(GHGs:CO2,CH4,N2O)near the lake surface,air and surface water sam-ples from 15 stations of Chaohu Lake in February,April,August and November 2017 were collected,and then GHGs concentrations and related physical and chemical parameters were analyzed. The results showed:1)During the observation period,the atmospheric GHGs concentration near the lake surface of Chaohu Lake has exceeded the global background average value in 2017,which should be paid enough attention to by related departments. 2) The certain temporal and spatial variation of atmospheric GHGs concentration near the lake surface has been ob-served. In time,the atmospheric GHGs concentration in winter in the whole lake area was significantly higher than that in other seasons. Spatially,no significant difference in atmospheric GHGs concentration among different lake regions has been observed,which might be affected by the wind direction and the land use types around the lake. 3)Correlation analysis results showed that no robust relative parameters controlled the temporal and spatial pattern of atmospheric GHGs concentration near the lake surface,indicating that the endogenous production of lake GHGs had little contribution to atmospheric GHGs near the lake surface. Combined with the analysis of re-gional wind direction data,it was found that the atmospheric transport of terrestrial(urban and farmland)GHGs was the main factor affecting the temporal and spatial distribution pattern of atmospheric GHGs concentrations near the lake surface of Chaohu Lake.
Chaohu Lakeatmospheric greenhouse gasspatio-temporal variationwind direction
NETL
NSTL
万方数据
