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应用 1 998年 5月～ 1 999年 4月草毡寒冻雏形土土壤CO2 释放通量的实测资料 ,通过对常用的三种土壤CO2 释放量估测方法的比较分析 ,提出了适合草毡寒冻雏形土土壤CO2 日及年释放量的估测方法。土壤CO2 日释放量的估测是以土壤CO2 释放通量为因变量 ,时间为驱动变量 ,建立时间与土壤CO2 释放通量的一元四次多项式 ,通过对时间的求导积分 ,得出土壤CO2 日释放量。土壤CO2 年释放量的估测是以测定日的土壤CO2 日释放量为因变量 ,以气候、土壤环境因子 (降水、蒸发、日照、气温、土壤 0～ 30cm地温等 )为驱动变量 ,建立土壤CO2 的日释放量与气候、土壤环境因子之间的多元非线性经验公式 ,应用气象站气候、土壤环境因子有关资料 ,逐日计算出其土壤CO2 的日释放量 ,最后应用累积法 ,可估测土壤CO2 的年释放量
Based on the measured data of soil CO 2 fluxes released from the felted frozen soil from May 1998 to April 1999, a comparative analysis of the estimation methods of the commonly used soil CO2 emissions was made. Estimation of daily and annual CO2 released from frozen soils. Soil CO2 emission is estimated based on the soil CO2 emission flux as the dependent variable and the time as the driving variable. The quadratic polynomial of time and soil CO2 emission flux is established. Deriving the soil CO2 Daily release. Soil CO2 emission is estimated based on daily CO2 emission on the measured day as the dependent variable and climate, soil environmental factors (precipitation, evaporation, sunshine, temperature, soil temperature 0 ~ 30cm, etc.) as the driving variables to establish the soil Daily CO2 emissions and climate, soil environmental factors between the multiple nonlinear empirical formula, the application of weather station climate, soil environmental factors related to daily data to calculate the daily soil CO2 emissions, the final application of the cumulative method can be estimated Annual release of soil CO2