Free atmospheric phosphine concentrations and fluxes in different wetland ecosystems, China.
Atmospheric phosphine (PH(3)) fluxes from typical types of wetlands and PH(3) concentrations in adjacent atmospheric air were measured. The seasonal distribution of PH(3) in marsh and paddy fields were observed. Positive PH(3) fluxes are significantly related to high air temperature (summer season) and increased vegetation. It is concluded that vegetation speeds up the liberation of PH(3) from soils, while water coverage might function as a diffusion barrier from soils or sediments to the atmosphere. The concentrations of atmospheric PH(3) (ng m(-3)) above different wetlands decrease in the order of paddy fields (51.8 ± 3.1) > marsh (46.5 ± 20.5) > lake (37.0 ± 22.7) > coastal wetland (1.71 ± 0.73). Highest atmospheric PH(3) levels in marsh are found in summer. In paddy fields, atmospheric PH(3) concentrations in flourishing stages are higher than those in slowly growing stages.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China.
Chao
C
Han
Jinju
J
Geng
Yuning
Y
Hong
Rui
R
Zhang
Xueyuan
X
Gu
Xiaorong
X
Wang
Shixiang
S
Gao
Dietmar
D
Glindemann
D000393:Air Pollutants / Q000032:analysis*; D002681:China; D004784:Environmental Monitoring; D010720:Phosphines / Q000032:analysis*; D012621:Seasons; D012989:Soil Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
D000393:Air Pollutants; D010720:Phosphines; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; C044646:phosphine