Talk:060512Report NCDCGlobalWinds

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(NCDCGlobalWinds Feedback)
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== NCDCGlobalWinds Feedback ==
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<H3>Regarding # 2 / Low Wind Speeds Over Land </H3>
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These are <B>+10 meter winds</B>.  It was understood the original plan was +50 meter,
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The GFS model used for these averages gives us the following options:
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<OL>
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<LI>Standard pressure levels</LI>
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<LI>Sigma 0.995</LI>
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<LI>+10 meters above sfc</LI>
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<LI>+0 to +30 mb above surface avg</LI>
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<LI>+1829 meters above sfc</LI>
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<LI>+2743 meters above sfc</LI>
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<LI>+3658 meters above sfc</LI>
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<LI>Maximum wind level</LI>
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</OL>
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I was told to try 10 meter first.  But I'm not surprised that
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winds at this level are a little weak over land, due to
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friction interaction at that level.
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If you want to try something else, I could whip up another file rather quickly ~ would just be a matter of changing a variable name in a script, changing some nc metadata, etc. and rerunning grads.
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The averaging function documentation is here:
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http://grads.iges.org/grads/gadoc/gradfuncave.html
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Will provide limited insight however.
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But I highly doubt this is the cuase of the low wind speeds.
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<H3>Point # 3</H3>
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We have had a fire in our camp I have had to drop everything to resolve lately.
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Just starting to get back to this.  As far as I know, the WCS service is built into the TDS. 
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I've simply attached this service to the .nc global file.  If there is more to do, I am not sure and would appreciate any feedback if this is inadequate.
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<pre>
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Dan Swank
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NCDC-NOMADS
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</pre>

Revision as of 11:39, 10 May 2006

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NCDCGlobalWinds Feedback

Regarding # 2 / Low Wind Speeds Over Land

These are +10 meter winds. It was understood the original plan was +50 meter, The GFS model used for these averages gives us the following options:

  1. Standard pressure levels
  2. Sigma 0.995
  3. +10 meters above sfc
  4. +0 to +30 mb above surface avg
  5. +1829 meters above sfc
  6. +2743 meters above sfc
  7. +3658 meters above sfc
  8. Maximum wind level

I was told to try 10 meter first. But I'm not surprised that winds at this level are a little weak over land, due to friction interaction at that level. If you want to try something else, I could whip up another file rather quickly ~ would just be a matter of changing a variable name in a script, changing some nc metadata, etc. and rerunning grads.

The averaging function documentation is here: http://grads.iges.org/grads/gadoc/gradfuncave.html Will provide limited insight however. But I highly doubt this is the cuase of the low wind speeds.


Point # 3

We have had a fire in our camp I have had to drop everything to resolve lately. Just starting to get back to this. As far as I know, the WCS service is built into the TDS. I've simply attached this service to the .nc global file. If there is more to do, I am not sure and would appreciate any feedback if this is inadequate.

Dan Swank
NCDC-NOMADS
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