Heiko,
I can see that. How about x/y_of_wind_gust? Wind of gust is a peculiar
construction for English. I'd be in favor of either x/y_of_wind_gust or
x/y_wind_gust.
Jim
On 5/26/14, 11:06 AM, Heiko Klein wrote:
> Hi Jim,
>
> while gust and wind gust are synonyms, wind gusts are immediately
> understood (and have 680.000 hits on google), while gust alone would
> leave me puzzled a while until I understand the context (and google
> will find a lot of people with the name Gust, but no wind).
>
> With the definition of wind from x_wind: "Wind is defined as a
> two-dimensional (horizontal) air velocity vector", I don't see so much
> redundancy in wind_of_gust. I'm quite ambivalent though about
> "x/y_wind_of_gust" or "x/y_wind_gust".
>
> Heiko
>
> On 2014-05-23 14:43, Jim Biard wrote:
>> Hi.
>>
>> Wind_of_gust is weirdly redundant. How about x_gust and y_gust?
>>
>> Jim
>>
>> On 5/23/14, 5:15 AM, Heiko Klein wrote:
>>> Dear John, Jonathan and Karl,
>>>
>>> thank you for your feedback.
>>>
>>>
>>> x_wind_[speed_]of_gust
>>> I like best x_wind_of_gust, since x_wind is a vector-component of a
>>> velocity, so it is not a pure speed, and neither a pure direction. I
>>> think it should be as close to x_wind as possible - though I see the
>>> point of eventually changing x_wind in the future.
>>>
>>> In AROME, wind-gusts are parametrized in a different way than a pure
>>> statistical extraction, so cell_method: time: max would be wrong here.
>>>
>>>
>>> graupel_fall_amount
>>> That is fine with us.
>>>
>>>
>>> inland_water_area_fraction
>>> I like the definition of wikipedia for sea:
>>> "The sea is the connected body of salty water that covers over 70
>>> percent of the Earth's surface."
>>> The border between 'river-delta' and the sea might be very difficult
>>> to define, though. It might be an idea to add this definition to
>>> sea_area_fraction.
>>>
>>> We use the area_fraction + type for soil-types. Since we use already
>>> sea_area_fraction and land_area_fraction, inland_water_area_fraction
>>> feels like a logical continuation of the division in land and water.
>>>
>>>
>>> Best regards,
>>>
>>> Heiko
>>>
>>> On 2014-05-22 20:03, John Graybeal wrote:
>>>> Karl,
>>>>
>>>> I've wondered about this 'gust' question myself, with respect to
>>>> wind_speed_of_gust, and to many other names with statistical
>>>> components
>>>> (mean, st_dev, minimum, etc.). I've always assumed that this either
>>>> reflected (a) convenience, or (b) the reality that many sensors return
>>>> data that is already parameterized (?), and so the characteristics
>>>> required for cell methods might not be readily captured.
>>>>
>>>> I would appreciate hearing further clarification of the CF
>>>> principles in
>>>> these cases. (Can be added to the FAQ!)
>>>>
>>>> John
>>>>
>>>>
>>>> On May 22, 2014, at 09:48, Karl Taylor <taylor13 at llnl.gov
>>>> <mailto:taylor13 at llnl.gov>> wrote:
>>>>>
>>>>> Hi Heiko et al.,
>>>>>
>>>>> I agree that if we include the "gust" name, it should include "speed"
>>>>> as in x_wind_speed_of_gust (for consistency with previous name).
>>>>>
>>>>> Alternatively, I'm not sure wind_speed_of _gust should ever be used
>>>>> when referring to observations or in many models, since it's just the
>>>>> maximum wind speed occurring during an interval, and it's not a
>>>>> different quantity from wind speed itself. If the
>>>>> x_wind_speed_of_gust is some parameterized quantity and can't be
>>>>> obtained from the x_wind time series (sampled at model time-step),
>>>>> then there might be an argument for defining a new standard_name.
>>>>>
>>>>> best regards,
>>>>> Karl
>>>>>
>>>>>
>>>>> On 5/22/14, 9:27 AM, John Graybeal wrote:
>>>>>> Hello Heiko, thanks for the requests.
>>>>>>
>>>>>> Re x|y_wind_gust, for consistency with existing names would
>>>>>> x_wind_speed_of_gust and y_wind_speed_of_gust be OK, for
>>>>>> consistency with the existing name wind_speed_of_gust?
>>>>>>
>>>>>> The description of graupel should be included in this definition.
>>>>>> For example "Graupel is precipitation that forms when supercooled
>>>>>> droplets of water are collected and freeze on a falling snowflake,
>>>>>> forming a 2?5 mm (0.079?0.197 in) ball of rime." Stolen from
>>>>>> wikipedia, you may have better/preferred language.
>>>>>>
>>>>>> Re the name graupelfall_amount, my web search found only uses that
>>>>>> treat graupel as a separate word (except in German), so is
>>>>>> graupel_fall_amount acceptable? I know it doesn't match the
>>>>>> existing snowfall/rainfall etc., but those are common English words.
>>>>>>
>>>>>> For inland_water_area_fraction, I don't know how to interpret
>>>>>> 'inland water ... is all water-surfaces which are not "sea" '. Are
>>>>>> bays, fjords, etc. inland water? Is there a clear transition at the
>>>>>> river delta of which part is inland and which is not? For CF this
>>>>>> may not be essential, but if the answers are well known it would be
>>>>>> helpful to state them. (And if not, maybe just say something like
>>>>>> 'inland water does not include any ocean or sea'.)
>>>>>>
>>>>>> John
>>>>>>
>>>>>> On May 22, 2014, at 01:10, Heiko Klein<Heiko.Klein at met.no> wrote:
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> we're currently converting the AROME model output to netcdf and
>>>>>>> have problems finding good standard_names for some of the
>>>>>>> parameters. Therefore, we would like to request the following new
>>>>>>> standard_names:
>>>>>>>
>>>>>>> x_wind_gust:
>>>>>>> definition: "x" indicates a vector component along the grid
>>>>>>> x-axis, positive with increasing x. Wind is defined as a
>>>>>>> two-dimensional (horizontal) air velocity vector, with no vertical
>>>>>>> component. (Vertical motion in the atmosphere has the standard
>>>>>>> name upward_air_velocity.)
>>>>>>> A gust is a sudden brief period of high wind speed. In an observed
>>>>>>> timeseries of wind speed, the gust wind speed can be indicated by
>>>>>>> a cell_methods of maximum for the time-interval. In an atmospheric
>>>>>>> model which has a parametrised calculation of gustiness, the gust
>>>>>>> wind speed may be separately diagnosed from the wind speed.
>>>>>>> units: m/s
>>>>>>>
>>>>>>> y_wind_gust:
>>>>>>> (see x_wind_gust. The definition is taken from the existing x_wind
>>>>>>> and wind_speed_of_gust)
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> graupelfall_amount:
>>>>>>> definition: "Amount" means mass per unit area.
>>>>>>> units: kg m-2
>>>>>>>
>>>>>>>
>>>>>>> inland_water_area_fraction:
>>>>>>> definition: "X_area_fraction" means the fraction of horizontal
>>>>>>> area occupied by X. "X_area" means the horizontal area occupied by
>>>>>>> X within the grid cell. "inland_water" is water surrounded by
>>>>>>> land-masses like rivers and lakes, and is all water-surfaces which
>>>>>>> are not "sea".
>>>>>>>
>>>>>>>
>>>>>>> Best regards,
>>>>>>>
>>>>>>> Heiko
>>>>>>> (on behalf of the MET Norway Arome team)
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Dr. Heiko Klein Tel. + 47 22 96 32 58
>>>>>>> Development Section / IT Department Fax. + 47 22 69 63 55
>>>>>>> Norwegian Meteorological Institutehttp://www.met.no
>>>>>>> P.O. Box 43 Blindern 0313 Oslo NORWAY
>>>>>>> _______________________________________________
>>>>>>> CF-metadata mailing list
>>>>>>> CF-metadata at cgd.ucar.edu
>>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>> ------------------------------------
>>>>>> John Graybeal
>>>>>> Marine Data Manager
>>>>>>
>>>>>> M +1 408 675-5445
>>>>>> skype: graybealski
>>>>>> Marinexplore
>>>>>> 920 Stewart Drive
>>>>>> Sunnyvale 94085
>>>>>> California, USA
>>>>>> www.marinexplore.com
>>>>>>
>>>>>> _______________________________________________
>>>>>> CF-metadata mailing list
>>>>>> CF-metadata at cgd.ucar.edu
>>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> CF-metadata mailing list
>>>>> CF-metadata at cgd.ucar.edu <mailto:CF-metadata at cgd.ucar.edu>
>>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>
>>>> ------------------------------------
>>>> *John Graybeal*
>>>> Marine Data Manager
>>>>
>>>> M +1 408 675-5445
>>>> skype: graybealski
>>>> Marinexplore
>>>> 920 Stewart Drive
>>>> Sunnyvale 94085
>>>> California, USA
>>>> www.marinexplore.com <http://marinexplore.com>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> CF-metadata mailing list
>>>> CF-metadata at cgd.ucar.edu
>>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>>>
>>>
>>
>> --
>> CICS-NC <http://www.cicsnc.org/> Visit us on
>> Facebook <http://www.facebook.com/cicsnc> *Jim Biard*
>> *Research Scholar*
>> Cooperative Institute for Climate and Satellites NC <http://cicsnc.org/>
>> North Carolina State University <http://ncsu.edu/>
>> NOAA's National Climatic Data Center <http://ncdc.noaa.gov/>
>> 151 Patton Ave, Asheville, NC 28801
>> e: jbiard at cicsnc.org
>> o: +1 828 271 4900
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> CF-metadata mailing list
>> CF-metadata at cgd.ucar.edu
>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>>
>
--
CICS-NC <http://www.cicsnc.org/> Visit us on
Facebook <http://www.facebook.com/cicsnc> *Jim Biard*
*Research Scholar*
Cooperative Institute for Climate and Satellites NC <http://cicsnc.org/>
North Carolina State University <http://ncsu.edu/>
NOAA's National Climatic Data Center <http://ncdc.noaa.gov/>
151 Patton Ave, Asheville, NC 28801
e: jbiard at cicsnc.org
o: +1 828 271 4900
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20140527/403863a4/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: jjcchejf.png
Type: image/png
Size: 11847 bytes
Desc: not available
URL: <http://mailman.cgd.ucar.edu/pipermail/cf-metadata/attachments/20140527/403863a4/attachment-0001.png>
Received on Tue May 27 2014 - 08:22:46 BST
