[RegCNET] lake model

[Richard Anyah]

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 I have a newer version of the lake model.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
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