[ncl-talk] Problem with calculation of wet bulb temperature

[Dennis Shea]

Many of Jonathan's heat stress metrics [ HumanIndexMod ] are available from
6.4.0 onward:

   * http://www.ncl.ucar.edu/Document/Functions/heat_stress.shtml*
<http://www.ncl.ucar.edu/Document/Functions/heat_stress.shtml>

On Tue, Aug 28, 2018 at 12:52 PM, Buzan, Jonathan <jbuzan at purdue.edu> wrote:

> Hi Barry,
>
> The wet bulb calculation requires EPT  for initial estimation (the
> algorithm uses an accelerated Newtonian convergence method). The
> HumanIndexMod uses the best available fast method for calculating EPT (from
> Bolton 1980), and is part of the out variables from the module.  It's like
> a 2 for one deal! ;).  The module also produces a battery of heat stress
> metrics, but can be manually turned off in the NCL routine.
>
> -Jonathan
>
>
> On Aug 28, 2018, at 11:25, Barry Lynn <barry.h.lynn at gmail.com> wrote:
>
> Hi Jonathan:
>
> Thanks very much.  This is probably the best approach.
>
> What did you mean by the "recommended equivalent temperature algorithm?"
> Do you mean that I should use it to calculate the equivalent potential
> temperature?
>
> Barry
>
> On Tue, Aug 28, 2018 at 8:43 PM Buzan, Jonathan <jbuzan at purdue.edu> wrote:
>
>> Hi Barry,
>>
>> There are new algorithms in the NCL code for calculating wet bulb
>> temperature, but probably one of the fastest accurate calculations
>> available is the Davies-Jones 2008 method.  I coded this up, and it is now
>> part of the Community Land Model version 5.
>>
>> Attached is a the Fortran routine, HumanIndexMod, that is set up to work
>> with NCL (using WRAPIT).  This also calculates the recommended equivalent
>> potential temperature algorithm, too.
>>
>> -Jonathan
>>
>>
>
> --
> Barry H. Lynn, Ph.D
> Senior Associate Scientist, Lecturer,
> The Institute of the Earth Science,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> C.E.O, Weather It Is, LTD
> Weather and Climate Focus
> http://weather-it-is.com
> Jerusalem, Israel
> Local: 02 930 9525
> Cell: 054 7 231 170
> Int-IS: x972 2 930 9525
>
>
> _______________________________________________
> ncl-talk mailing list
> ncl-talk at ucar.edu
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20180828/c6f6923c/attachment.html>