<p>I have a question about the dynamics of westward propagating vortices. 
In meteorology, the vorticity tendency is often used to explain the westward propagation of vortices (cyclonic circulation).</p>

<p>A good paper that utilizes this is as follows:
<a href="https://journals.ametsoc.org/doi/full/10.1175/JCLI-D-14-00170.1" rel="nofollow noreferrer">https://journals.ametsoc.org/doi/full/10.1175/JCLI-D-14-00170.1</a></p>

<p>"Development and Formation Mechanism of the Southeast Asian Winter Heavy Rainfall Events around the South China Sea. Part I: Formation and Propagation of Cold Surge Vortex" by Chen et al. (2015).</p>

<p>This paper used the vorticity tendecy equation at 925hPa.However, I am wondering if it is correct to apply this at this level. Should this be more appropriate at 850hPa or higher levels, where terrain effects are minimal especially over the maritime continent?</p>

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2019-06-17T05:29:26.143Z
hi @gansub..indeed I am familiar with the borneo vortex. Do you know any reference that I can read about the proper layer where to apply the vorticity budget in general? i have seen many papers using this at 925 and 850hPa. One japanese professor here said that this should be applied in the free atmosphere (850hPa or higher) but he just said that this is because of the dynamics. Still, I want to prove that even at 925hPa this should be applicable.
Lyndz
<meteorology><atmospheric-circulation><mesoscale-meteorology><dynamics>
Application of vorticity tendency equation
Lyndz
# Application of vorticity tendency equation

(Asked by: username_0 on 2019-06-17)

I have a question about the dynamics of westward propagating vortices.
In meteorology, the vorticity tendency is often used to explain the westward propagation of vortices (cyclonic circulation).

A good paper that utilizes this is as follows:
<https://journals.ametsoc.org/doi/full/10.1175/JCLI-D-14-00170.1>

"Development and Formation Mechanism of the Southeast Asian Winter Heavy Rainfall Events around the South China Sea. Part I: Formation and Propagation of Cold Surge Vortex" by Chen et al. (2015).

This paper used the vorticity tendecy equation at 925hPa.However, I am wondering if it is correct to apply this at this level. Should this be more appropriate at 850hPa or higher levels, where terrain effects are minimal especially over the maritime continent?

**Tags:** meteorology, atmospheric-circulation, mesoscale-meteorology, dynamics

> **Comments:**
> **username_0**: hi @gansub..indeed I am familiar with the borneo vortex. Do you know any reference that I can read about the proper layer where to apply the vorticity budget in general? i have seen many papers using this at 925 and 850hPa. One japanese professor here said that this should be applied in the free atmosphere (850hPa or higher) but he just said that this is because of the dynamics. Still, I want to prove that even at 925hPa this should be applicable.  

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## 0 answers

