[Dissolved N2O concentrations and N2O emissions from aquatic systems of lake and river in Taihu Lake Region].
Aquatic systems are an important source of N2O emissions. N2O concentrations dissolved in lake and river water in Taihu Lake region and N2O fluxes from these waterbodies were monitored twice a month in three replicate from Sept. 26, 2000 to Sept. 26, 2001. At the same time, both top and bottom water were analyzed for N2O concentrations four times in a consecutive year. Results demonstrated that rather high N2O-N concentrations of 11.31 micrograms/L were dissolved in river water and resulted in high N2O-N fluxes of 122.5 micrograms/(m2.h) from river water surfaces while low N2O-N concentration of 0.36 microgram/L and N2O-N flux of 3.53 micrograms/(m2.h) was found in lake water. No obvious difference was found in dissolved N2O concentration between top water and bottom water. Results also indicated that there existed significantly positive relationship between dissolved N2O concentration and N2O flux and water temperature. The results indicate that the aquatic systems are an important source of N2O.
Xiong
Zhengqin
Z
Xing
Guangxi
G
Shen
Guangyu
G
Shi
Shulian
S
Du
Lijuan
L
D002681:China; D005618:Fresh Water / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012995:Solubility; D014874:Water Pollutants, Chemical / Q000032:analysis*
D014874:Water Pollutants, Chemical; D009609:Nitrous Oxide