[RegCNET] lake model

Robert Mera rjmera at ncsu.edu
Thu Jun 28 23:38:01 CEST 2007


Hi Richard / Imran,

Indeed we at NC State were successful with the parallel version. Jared 
Bowden has more details.

Robert Mera

Richard Anyah wrote:
> Hi Imran,
> I know the group at NC State University ( Prof. Fred Semazzi's Research 
> Group) succefully managed to run latest version of lake model  in parallel.
>
> Richard
>
>
> IMRAN NADEEM wrote:
>
>   
>> Hi Steve,
>>
>>         I heard that present version of lake model works only in 
>> serial mode. What about latest version which you are going to
>> put in the latest version of RegCM3. Does that works also in Parallel 
>> mode?
>>
>> Regards
>> Imran Nadeem
>>
>> On 6/28/07, *Richard Anyah* <anyah at cep.rutgers.edu 
>> <mailto:anyah at cep.rutgers.edu>> wrote:
>>
>>     Steve,
>>     That would be great. Update us when you get time to do it.
>>     Thanks
>>     Richard
>>
>>
>>     Steve Hostetler wrote:
>>
>>     > Richard,
>>     > I have a newer version of the lake model.  I am plan to put it into
>>     > the newest version of RegCM when I can find the time-- maybe
>>     sometime
>>     > this fall.
>>     >
>>     > steve
>>     >
>>     >-----------------------------------------------------
>>     >Steve Hostetler
>>     >US Geological Survey
>>     >Department of Geosciences
>>     >Room 104 Wilikinson Hall
>>     >Oregon State University
>>     >Corvallis, OR 97331-5560
>>     >tel 541 737-8928 fax 541 737-1200
>>     >
>>     >
>>     >
>>     >
>>     > Richard Anyah wrote:
>>     >
>>     >>Hi Mike,
>>     >>When the lake is turned off, the lake surface is treated as
>>     inland water
>>     >>body(patch) in the land surface scheme(BATS). In which case, the
>>     fluxes
>>     >>over the water patch may be different from the rest of the land
>>     cells.
>>     >>But, when you use the 1D lake, you introduce the vertical flux
>>     transport
>>     >>within the water column(full depth) and to the atmosphere which mayl
>>     >>signficantly change the atmospheric response; depending on the
>>     size and
>>     >>depth of the lake.
>>     >>
>>     >>
>>     >>The reference below may be useful.  They used one of the original
>>     >>versions of RegCM. The lake model has not changed so much,  I
>>     think. You
>>     >>could also check Hostetler et al., 1993 (check details in the
>>     ref. below).
>>     >>
>>     >>*
>>     >>*Gary T. Bates, Steven W. Hostetler, and Filippo Giorgi, 1995:
>>     Two-Year
>>     >>Simulation of the Great Lakes Region with a Coupled Modeling System.
>>     >>Monthly Weather Review:123, 1505 1522
>>     >> Richard
>>     >>
>>     >>
>>     >>Michael Notaro wrote:
>>     >>
>>     >>
>>     >>
>>     >>>Thanks, Richard!  You have been quite helpful.  I will look at
>>     those
>>     >>>papers.
>>     >>>
>>     >>>I want to clarify one thing.
>>     >>>When the lake is "turned off" then, does that mean the the lake
>>     does
>>     >>>not exist
>>     >>>and it is treated as land (bare soil, forest?)?  So, if I run with
>>     >>>and without the lake model,
>>     >>>the difference is the effect of the existence of those lakes on the
>>     >>>atmosphere?  I was interested
>>     >>>in investigating how the lakes affect the local climate.
>>     >>>
>>     >>>How is lake ice treated?  Unfortunately, the papers on Africa won't
>>     >>>address that since
>>     >>>they are for a warm climate.
>>     >>>
>>     >>>Does anyone know of papers using RegCM3 and the lake model for the
>>     >>>Great Lakes?
>>     >>>
>>     >>>Thanks, Mike
>>     >>>
>>     >>>
>>     >>>
>>     >>>On Jun 28, 2007, at 8:33 AM, Richard Anyah wrote:
>>     >>>
>>     >>>
>>     >>>
>>     >>>>Hi Mike,
>>     >>>>
>>     >>>>The following publications may be relevant, though they use lake
>>     >>>>model from variants of the RegCM family for Lake Victroia in
>>     >>>>equatorial eastern Africa.
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>>I have some general questions about the lake model in RegCM3.
>>     >>>>>In particular, relating to the Great Lakes.
>>     >>>>>
>>     >>>>>Could someone email me the references to some papers that use the
>>     >>>>>lake model with regcm3?  I would like to see previous
>>     applications
>>     >>>>>
>>     >>>>>
>>     >>>>>
>>     >>>>1.  Song, Y., F.H.M. Semazzi and L. Xie, 2002: Development of a
>>     >>>>coupled regional climate simulation model for the Lake Victoria
>>     >>>>Basin. In /The East African Great
>>     Lakes,Limnology,Paleolimnology  and
>>     >>>>Biodiversity/, Odada E and Olago G(eds). Gordon and Breach:
>>     >>>>Armsterdam: 141-154
>>     >>>>
>>     >>>>2.  Song, Y., F.H.M. Semazzi and L. Xie, and L.J. Ogallo, 2004: A
>>     >>>>coupled regional climate model for Lake Victoria basin of East
>>     >>>>Africa. /Int. J. Climatol/. *24*, 57-75
>>     >>>>
>>     >>>>
>>     >>>>3.   Anyah, R.O., and F. H. M. Semazzi, 2004: Simulation of the
>>     >>>>response of Lake Victoria basin climate to lake surface
>>     >>>>temperatures./Theor. Appl. Climatol/,* 79, *55-69
>>     >>>>
>>     >>>>
>>     >>>>4.   Anyah, R.O., F.H.M. Semazzi and Lian Xie, 2006: Simulated
>>     >>>>physical mechanisms associated with multi-scale climate
>>     variability
>>     >>>>over Lake Victoria Basin in East Africa, Monthly Weather Review:
>>     >>>>134,3588-3609
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>>What dynamics does the lake model simulate?  Lake ice
>>     fluctuations?
>>     >>>>>Changes in lake level?
>>     >>>>>
>>     >>>>>
>>     >>>>>
>>     >>>>       You may have to compute changes in E, P and horizonatal
>>     >>>>mosture convergence to infer lake level fluctuations.
>>     >>>>      Also the 1D lake use simplified vertical exhange of moisture
>>     >>>>and heat between the lake and the atmosphere.(See refs. 1, 2 and 4
>>     >>>>above)
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>>If the lake model is turned off, does the model assume
>>     >>>>>climatological  lake
>>     >>>>>temperatures or is the lake replaced by land?
>>     >>>>>
>>     >>>>>
>>     >>>>>
>>     >>>>As far as I know  when the lake is tuurned off, the "lake" surface
>>     >>>>temperature uses the  surface temperature, unless you physically
>>     >>>>prescribe 'climatological' temperature over the lake surface
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>Hope the information may be helpful.
>>     >>>>
>>     >>>>Richard
>>     >>>>
>>     >>>>--
>>     >>>>------------------------------------------------
>>     >>>>Richard Anyah
>>     >>>>Research Associate
>>     >>>>Center for Environmental Prediction
>>     >>>>Department of Environmental Sciences
>>     >>>>Rutgers University
>>     >>>>14 College Farm RD
>>     >>>>New Brunswick, NJ 08901-8551
>>     >>>>Phone: (732) 932 9735
>>     >>>>Fax:     (732) 932 8644
>>     >>>>-----------------------------------------------
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>>>
>>     >>
>>     >>
>>
>>
>>     --
>>     ------------------------------------------------
>>     Dr. Richard Anyah
>>     Research Associate
>>     Center for Environmental Prediction
>>     Department of Environmental Sciences
>>     Rutgers University
>>     14 College Farm RD
>>     New Brunswick, NJ 08901-8551
>>     Phone: (732) 932 9735
>>     Fax:     (732) 932 8644
>>     http://www.envsci.rutgers.edu/~anyah
>>     <http://www.envsci.rutgers.edu/%7Eanyah>
>>     -----------------------------------------------
>>
>>
>>
>>
>>
>>
>>
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>>
>>
>>
>> -- 
>> Imran Nadeem
>> PhD Student
>> Institute of Meteorology
>> Department of Water, Atmosphere and Environment
>> Uni. of Natural Resources and Applied Life Sciences (BOKU)
>>
>> Peter-Jordan Strasse 82
>> 1190 Vienna, Austria
>>
>> Mobile: +43 699 1194 3044
>> Tel.: +43 1 47654 5614
>> Fax: +43 1 47654 5610
>>
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