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- W2354817358 abstract "Carbon dioxide (CO_2), methane (CH_4) and nitrous oxide (N_2O) are three primary greenhouse gases in the atmosphere; they occupy 70%, 23%and 7%in the greenhouse forcing, respectively. Many recent studies indicate that wetlands are major sources of greenhouse gas emissions. In July and August 2004, static, closed chamber technique was used to investigate the emission and consumption of CH_4, CO_2 and N_2O in situ at Chongming east tidal flat (CM), which is the biggest and well developed typical estuarine intertidal flat wetland of Yangtze estuary. Triple black (opaque) and white (transparent) air chamber collectors were employed to collect air exchange samples at the tidal flat-atmosphere interface during ebb tide. The results indicate that CM low tidal flat was the source of atmosphere CH_4 in summer, with a emission flux of 40.2 μg/(m~2·h). At the same time, low tidal flat was the sink of atmosphere CO_2 and N_2O, the adsorption flux was -86.3 mg/(m~2·h) and -86.3 μg/(m~2·h), respectively. In July and August, middle tidal flat was the source of atmosphere CO_2, CH_4 and N_2O. The day average emission flux of CO_2, CH_4 and N_2O was 6.56 mg/(m~2·h), 301 mg/(m~2·h) and 69.9 μg/(m~2·h). Temperature (including air temperature and different depth ground temperature), the sediment organic matter content and the photosynthesis and respiration of the tidal flat plant (Scirpus mariqueter and benthonic alga) were the main effect factors on the production emission and adsorption of CO_2, CH_4 and N_2O. Correlation analysis shows that middle tidal flat-atmosphere interface CO_2, CH_4 and N_2O fluxes had a significant positive correlation to environment temperature (including air temperature and different depth ground temperature), but at low tidal flat, the correlation was not significant." @default.
- W2354817358 created "2016-06-24" @default.
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- W2354817358 date "2007-01-01" @default.
- W2354817358 modified "2023-09-25" @default.
- W2354817358 title "Fluxes of CH_4,CO_2 and N_2O from Yangtze estuary intertidal flat in summer season" @default.
- W2354817358 hasPublicationYear "2007" @default.
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