A Study of Eddy-induced Fluctuations of the Zonal-Mean Wind Using Conventional and Transformed Eulerian Diagnostics
A Study of Eddy-induced Fluctuations of the Zonal-Mean Wind Using Conventional and Transformed Eulerian Diagnostics
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DOI：
10.1175/1520-0469(1992)049
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发表时间：
1992-06
影响因子：
3.1
通讯作者：
R. Pfeffer
中科院分区：
文献类型：
--
作者：
R. Pfeffer
摘要 使用 ECMWF FGGE IIIb 数据，从传统和转换欧拉诊断的角度检查对流层和平流层低层涡流引起的纬向平均流波动的动态。整个 FGGE 年的变换欧拉角动量方程中不同项之间的空间相关性揭示了 Eliassen-Palm (E-P) 通量的水平分量的散度（与动量的经向涡流通量相关）与纬向流的形状和强度的日常变化之间存在显着的正相关关系。研究还发现，与涡流引起的剩余环流相关的科里奥利扭矩与 E-P 通量的垂直分量的发散度（与向极的热涡流和斜压波发展相关）之间存在非常高的负相关性。解释了为什么变换欧拉动量方程中的科里奥利项如此有效......
Abstract The dynamics of eddy-induced fluctuations of the zonal-mean current in the troposphere and lower stratosphere is examined from the perspective of conventional and transformed Eulerian diagnostics using ECMWF FGGE IIIb data. Spatial correlations among different terms in the transformed Eulerian angular momentum equation for the entire FGGE year reveal a significant positive relationship between the divergence of the horizontal component of the Eliassen-Palm (E-P) flux (which is associated with meridional eddy fluxes of momentum) and day-to-day changes in the shape and intensity of the zonal current. It is found also that a very high negative correlation exists between the Coriolis torque associated with the eddy-induced residual circulation and the divergence of the vertical component of the E-P flux (which is associated with poleward eddy fluxes of heat and baroclinic wave development). An explanation is given as to why the Coriolis term in the transformed Eulerian momentum equation so effectivel...