EP通量是大气学子的老朋友，我们在学习罗斯贝波时可以用它诊断，当然在局地天气诊断方面也有能发挥作用。
当我们比较急着用它完成课堂作业或者小组汇报时，可以打开这个网址
EP Flux from the NCEP/NCAR Reanalysis: NOAA Physical Sciences Laboratory ：https://psl.noaa.gov/data/epflux/
NOAA的EP通量网页
主页介绍如下
Quasi-geostrophic Eliassen Palm flux on the sphere are computed from daily-averaged values of wind and temperature taken from the NCAR/NCEP Reanalysis hosted at ESRL/PSL. The EP-Flux vectors have been scaled for display purposes. Contours show the value of EP Flux divergence. Areas of EP-Flux convergence, and hence of westerly deceleration shown by solid lines. Note that vectors above 100mb will be multiplied by a scale factor which you can change.
日期范围可以如上选择，点击create plot即可获得图片
这时候有小朋友要问，那么我们怎么自己计算呢,
气象学家公众号写过文章
可以参考如下代
Eliassen‐Palm通量矢量缩放比例 (含Python/NCL/GrADS代码 测试数据)
