基于涡动相关技术对生态系统生产力和呼吸作用的模拟研究

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Abstract The net ecosystem exchange (NEE) of CO₂between the ecosystem and the atmosphere reflects the balance between the gross CO₂ assimilation and ecosystem respiration (R_eco). In order to understand the responding mechanism induced by environmental change,it is important to separate the two fluxs. Above GPP is assumed to be zero during night time periods (defined here as global radiation R_g<20 W/m²). And the measured NEE is equal to R_eco. This paper uses the estimation method to extrapolate the night time respiration to daytime based on night time data. According to the equation of NEE= R_eco-GPP,the GPP is calculated. With the observation and calculation data,it analyzes daily variation tendency of NEE,GPP and R_eco as well as the relationship between the meteorological factors and NEE,GPP,R_eco,respectively.

Key words： eddy covariance flux partitioning GPP NEE R_eco

Received: 15 January 2016

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Liu Mingyang. Separation of net ecosystem exchange into assimilation and respiration based on eddy covariance technique[J]. Meteorological Hydrological and Marine Instrument, 2016, 33(2): 22-30.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2016/V33/I2/22

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