Comparison of 14CO2, CO, and SF6 as tracers for recently added fossil fuel CO2 in the atmosphere and implications for biological CO2 exchange -: art. no. L01817
Comparison of 14CO2, CO, and SF6 as tracers for recently added fossil fuel CO2 in the atmosphere and implications for biological CO2 exchange -: art. no. L01817
复制标题
DOI：
10.1029/2005gl024213
复制
发表时间：
2006-01-14
影响因子：
5.2
通讯作者：
Southon, J
中科院分区：
文献类型：
--
作者：
Turnbull, JC;Miller, JB;Southon, J
我们使用近乎理想的示踪剂 (CO2)-C-14 来估计新英格兰和科罗拉多州两个地点边界层空气中化石燃料 CO2 的增强。 Delta(14)C 测量精度提高至 1.6 - 2.6%，提供 0.8 - 1.5 ppm 的化石燃料 CO2 检测能力。使用间接示踪剂 CO 和 SF6，我们获得了化石燃料 CO2 成分的两个额外独立估计值，并且我们评估了这些方法相对于基于 (CO2)-C-14 的估计值的偏差。基于 SF6 的估计值与基于 (CO2)-C-14 的估计值相差很大，有时大得令人难以置信。基于 CO 的估计变量较少，但显示出相对于 (CO2)-C-14 方法的季节性一致偏差。
We use the nearly ideal tracer (CO2)-C-14 to estimate the fossil fuel CO2 enhancement in boundary layer air at two sites in New England and Colorado. Improved Delta(14)C measurement precision of 1.6 - 2.6% provides fossil fuel CO2 detection capability of 0.8 - 1.5 ppm. Using the indirect tracers CO and SF6, we obtain two additional independent estimates of the fossil fuel CO2 component, and we assess the biases in these methods with respect to the (CO2)-C-14-based estimates. The SF6-based estimates vary considerably from the (CO2)-C-14-based estimates, and are at times implausibly large. The CO-based estimates are less variable, but show seasonally coherent biases with respect to the (CO2)-C-14 method.