广东省入库河口N2O分布和通量的时空变化

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Abstract

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.

Key words： estuaries nitrous oxide distribution flux spatiotemporal variation

Received: 25 June 2012

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	Articles by authors
	ZHANG Xiao-meng
	YANG Yang
	CAI Nan
	LIU Wang
	Qiao Yong-min

Cite this article:

ZHANG Xiao-meng,YANG Yang,CAI Nan, et al. Spatiotemporal variations of nitrous oxide distribution and flux in estuaries of Guangdong Province[J]. , 2012, 31(3): 306-311.

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http://www.ecolsci.com/EN/ OR http://www.ecolsci.com/EN/Y2012/V31/I3/306

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