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Diurnal and Seasonal Variation of CO2 and CH4 Fluxes in Tomago Wetland

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  • David Safari
  • Grant C Edwards
  • Faustina Gyabaah

Abstract

The measurement of greenhouse gas (GHG) fluxes in estuaries is crucial in expressing the impacts of these GHGs on global warming, and hence climate change. In this study, we investigated the effect of various environmental and micrometeorological factors on diurnal and seasonal variations of methane (CH4) and carbon dioxide (CO2) in a tidal inundated saltmarsh. Measurements of GHG fluxes were taken by using eddy covariance technique from August 2015 to July 2016 in Tomago wetland, Newcastle, NSW, Australia. In this paper, a positive flux is defined as the one directing into the atmosphere. The highest average diurnal emissions were 2.54 µg m-2 s-1 CH4 during the day and 0.45 mg m-2 s-1 CO2 at night. Monthly average fluxes peaked in February (0.365 µg m-2 s-1 CH4 and 0.137 mg m-2 s-1 CO2). There was a significant negative relationship between CO2 flux and water level (p

Suggested Citation

  • David Safari & Grant C Edwards & Faustina Gyabaah, 2020. "Diurnal and Seasonal Variation of CO2 and CH4 Fluxes in Tomago Wetland," International Journal of Sciences, Office ijSciences, vol. 9(01), pages 41-51, January.
    • Handle: RePEc:adm:journl:v:9:y:2020:i:1:p:41-51
    DOI: 10.18483/ijSci.2229
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    1. Linda A. Deegan & David Samuel Johnson & R. Scott Warren & Bruce J. Peterson & John W. Fleeger & Sergio Fagherazzi & Wilfred M. Wollheim, 2012. "Coastal eutrophication as a driver of salt marsh loss," Nature, Nature, vol. 490(7420), pages 388-392, October.
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