A generalization of the transformed Eulerian‐mean meridional circulation
A generalization of the transformed Eulerian‐mean meridional circulation
复制标题
变换欧拉平均经向环流的推广
DOI：
10.1002/qj.49712757109
复制
发表时间：
2001
影响因子：
8.9
通讯作者：
M. Juckes
中科院分区：
文献类型：
--
作者：
M. Juckes
转换后的欧拉平均质量流函数给出了通过等熵面的质量通量的估计值，即在压力面上评估的涡流通量。这对于数据分析和理论结果的解释都很方便，而理论结果有时更容易用压力坐标表示。导出了一个概括，它描述了通过任意等值面的质量通量，只要定义等值面的量具有明显的垂直梯度。推广适用于Ertel的位涡等值面，包括动力对流层顶。
The transformed Eulerian‐mean mass stream function gives an estimate of the mass flux across isentropic surfaces in terms of eddy fluxes evaluated on pressure surfaces. This is convenient both for data analysis and for the interpretation of theoretical results which are sometimes more easily expressed in pressure coordinates. A generalization is derived which describes the mass flux across an arbitrary iso‐surface, provided that the quantity defining the iso‐surface has a clear vertical gradient. The generalization is applied to iso‐surfaces of Ertel's potential vorticity, including the dynamical tropopause.