Spatiotemporal variations of nitrous oxide distribution and flux in estuaries of Guangdong Province
ZHANG Xiao-meng1, YANG Yang1,3, CAI Nan2, LIU Wang2, Qiao Yong-min1,3
1. Research Center of Hydrobiology, Jinan University, Guangzhou 510632, China; 2. South China Institute of Environmental sciences of the Ministry of Environmental Protection, Guangzhou 510655, China; 3. Ministry of Education Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Guangzhou 510632, China
The concentrations and water-atmosphere fluxes of dissolved N2O were investigated in estuaries of 13 rivers of Guangdong Province during July(flooded season) and December(dry season),2011.N2O concentrations in the surface water were measured by purge and trap-gas chromatography,N2O water-atmosphere fluxes were estimated by Liss & Merlivat formula.The results demonstrated that dissolved N2O concentrations in the flooded season were 15.37-175.22 nmol/L,with an average of(73.77±43.58) nmol/L,N2O water-atmosphere fluxes in flooded season were 0.26-5.40 μmol/(m2·d),with an average of(2.53±1.94) μmol/(m2·d).While in dry season,N2O concentrations ranged from 44.26 nmol/L to 366.11 nmol/L,with an average of(126.61±102.74) nmol/L,N2O water-atmosphere fluxes ranged from 0.86 μmol/(m2·d) to 21.88 μmol/(m2·d),with an average of(7.50±6.65) μmol/(m2·).N2O concentrations and water-atmosphere fluxes of flooded season were lower than those of dry season.Compared with other studies,the estuaries in this study had lower N2O concentrations and water-atmosphere fluxes.
张晓萌1, 杨扬1,3*, 蔡楠2, 刘旺2, 乔永民1,3. 广东省入库河口N2O分布和通量的时空变化[J]. , 2012, 31(3): 306-311.
ZHANG Xiao-meng1, YANG Yang1,3, CAI Nan2, LIU Wang2, Qiao Yong-min1,3. Spatiotemporal variations of nitrous oxide distribution and flux in estuaries of Guangdong Province. , 2012, 31(3): 306-311.
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