Abstract

Eddy correlation technique was used to obtain the carbon fluxes (2012 and 2013) in the coastal wetlands of the Liaohe Delta. The carbon flux daily data were used to validate the biogeochemical models that are parameterized by data such as meteorology and water level (Wetland-DNDC). The observation results showed that the trend of carbon flux in the Liaohe Delta is absorption in growing season and weak discharge in non-growing season. The model results showed significant linear correlation with the observation, the simulation result was relatively correct. The results showed that the trend of Reed output is consistent with that of simulation. The annual carbon sequestration capacity was estimated to be 1502.24g-CO2-m−2 on an average in the recent 30 years, with a fluctuating increase trend. Further analysis explained the correlation between environmental factors such as temperature, precipitation and CO2 content and the annual carbon sequestration amount. Correlation between CO2 content and annual absorption was followed by temperature, with no correlation with precipitation. The carbon sequestration capacity of the Liaohe Delta increases with change of climate.

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