Sources of variations in total column carbon dioxide
Sources of variations in total column carbon dioxide
复制标题
DOI：
10.5194/acp-11-3581-2011
复制
发表时间：
2011-01-01
影响因子：
6.3
通讯作者：
Schneider, T.
中科院分区：
文献类型：
--
作者：
Keppel-Aleks, G.;Wennberg, P. O.;Schneider, T.
总CO（2）柱（< CO（2）>）中梯度的观测有望提供对CO（2）表面通量的改进约束。在这里，我们使用一个大气环流模式与各种规定的碳通量来研究如何变化的< CO（2）>出现。在日尺度上，变化很小，是由当地通量和平流强迫的。在季节尺度上，梯度由南北通量分布决定。在天气尺度上，由于纬向梯度的大尺度涡动驱动扰动而产生变化。在这种情况下，由于< CO（2）>的变化与天气活动有关，< CO（2）>和动力示踪剂之间存在显著的相关性。我们说明了这种相关性如何可以用来描述南北梯度的< CO（2）>和下垫面通量在大陆尺度上。这些模拟提出了一个新的分析框架，使用碳循环科学中的柱观测。
Observations of gradients in the total CO(2) column, < CO(2)>, are expected to provide improved constraints on surface fluxes of CO(2). Here we use a general circulation model with a variety of prescribed carbon fluxes to investigate how variations in < CO(2)> arise. On diurnal scales, variations are small and are forced by both local fluxes and advection. On seasonal scales, gradients are set by the north-south flux distribution. On synoptic scales, variations arise due to large-scale eddy-driven disturbances of the meridional gradient. In this case, because variations in < CO(2)> are tied to synoptic activity, significant correlations exist between < CO(2)> and dynamical tracers. We illustrate how such correlations can be used to describe the north-south gradients of < CO(2)> and the underlying fluxes on continental scales. These simulations suggest a novel analysis framework for using column observations in carbon cycle science.