The Study On Carbon Flux Ground Monitoring In Binzhou Seashell Islands And Wetlands

The continuously increasing concentrations of greenhouse gases and global climatic changing have resulted in the focus on global carbon cycle that has been one of hot topics towards the researches in the field of ecology. The wetlands are important ecosystem types. Wetland carbon cycle plays an important role in the global climate change, while the study of wetland carbon fluxes is the key issue of wetland carbon cycle. This study selected Binzhou Seashell Islands and Wetlands as the study object, did geographical survey of protected areas at first, research methodology is based on the theory of eddy covariance flux measurements. This study sets eddy covariance system information collection frequency as10Hz. The original data uses two-dimensional coordinate method and WPL correction to correct, excluding three times the standard deviation of flux data, apply mean diurnal variation method (MDV) to impute missing data, at last gets the30min available average CO2flux data. The main conclusions were listed as follows:(1) Binzhou Seashell Islands and Wetlands National Nature Reserve Seashell is unique, and it is a typical shell beach ridges wetland ecosystems, to carry out carbon flux monitoring study has important significance; the protected areas meet the eddy covariance system of siting conditions, thus it is the ideal study object for flux observation research study.(2) In this study, the night friction velocity and CO2fluxes are not directly related. CO2flux and temperature, H2O flux, sensible heat flux and latent heat fluxes were tested highly correlated with negative correlation.(3) CO2flux characteristic curve in the study area in February and March have shown a "V" shaped feature, CO2absorption peaks at about13:00. Average peak of carbon absorption was3.7μmol·m-2·s-1in February,3.9μmol·m-2·s-1in March. February during the day from8:00to18:00, and March during the day from7:00to19:30showed significant downward flux, the overall performance of the study area is carbon sink. March carbon sequestration is greater than in February.Binzhou Seashell Islands and Wetlands is a typical shell beach ridges wetland ecosystems, it has a great uniqueness. This study is the first time to carry out carbon flux related research in this kind of wetland. It can provide data support to worldwide carbon and water fluxes research, helps to clarify the processes and mechanisms of ecosystem matter and energy transfer, identifies carbon source/sink temporal pattern, predict future trends of climate change, and provides reference for environmental management and developing strategies.