[RegCNET] lake model

[Steve Hostetler]

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I have a newer version of the lake model.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
>>> -----------------------------------------------
>>>
>>>
>>>
>>>
>>>
>>>
>>>       
>
>
>   
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