[MITgcm-support] 回复： vertical momentum tendency

[Haoran Xu]

Hi Matt,
   Thanks for your clarification.

Haoran Xu




---- 回复的原邮件 ----
| 发件人 | Matthew Mazloff<mmazloff at ucsd.edu> |
| 日期 | 2022年05月18日 09:47 |
| 收件人 | mitgcm-support at mitgcm.org<mitgcm-support at mitgcm.org> |
| 抄送至 | |
| 主题 | Re: [MITgcm-support] vertical momentum tendency |
Hi Haoron


Dump snapshots at the interval you need to get dW/dt.


For example daily tendency would be derived from 
   frequency(1) = -86400.0,
   timePhase(1) = 0.0,
   fields(1,1) = 'WVEL    ',
   filename(1) = ‘WvelSnap’,




Matt




On May 17, 2022, at 5:47 PM, 钱钰坤 <qianyk at mail3.sysu.edu.cn> wrote:


Hi Haoran,


Thank you for your help.  But I don't really know how these two diagnostics
could help in deriving the tendency of w (unit of acceleration).


My understanding is that these two diagnostics are useful in calculating the
eddy momentum flux when the output is time-average <> one.  For example,
<w'u'> = <wu> - <w><u>
If we output monthly mean wu, w, and u, we can get eddy flux <w'u'> for this
month.


Best regards

-----------------------------------------
Yu-Kun Qian (钱钰坤)
South China Sea Institute of Oceanology
Sun Yat-sen University
Xingang West Road, Haizhu District
Guangzhou, P.R. China
Email: qianyukun at scsio.ac.cn, qianyk at mail3.sysu.edu.cn
 
 
 
 
------------------ 原始邮件 ------------------
发件人: "Haoran Xu"<xu1jian2wei3 at 163.com>;
发送时间: 2022年5月17日(星期二) 晚上7:40
收件人: "MITgcm-support"<mitgcm-support at mitgcm.org>;
主题: Re: [MITgcm-support] vertical momentum tendency
 
Hi，
 If I understand correctly,these two diagnostics could help.




WU_VEL  |WU      LR|m.m/s^2         |Vertical Transport of Zonal Momentum
WV_VEL  |WV      LR|m.m/s^2         |Vertical Transport of Meridional Momentum


 Haoran Xu.



At 2022-05-17 18:30:48, "钱钰坤" <qianyk at mail3.sysu.edu.cn> wrote:

Hi all,


Just a quick question.  Why there is no tendency of vertical momentum,
like TOTWTEND, in the diagnostics even the non-hydrostatic option is
turned on?


To close the energy budget, I guess we need this diagnostic.  Is there any
workaround to obtain it if there is no TOTWTEND?


Best regards.

---------------------------
Yu-Kun Qian (钱钰坤)
South China Sea Institute of Oceanology

Sun Yat-sen University
Xingang West Road, Haizhu District
Guangzhou, P.R. China
Email: qianyk at mail3.sysu.edu.cn
 
 



 

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