[MITgcm-devel] heat fluxes

[Martin Losch]

Looks like it is just the way it is. What it means though, is that all  
data that start with ncep_ in the repository is likely to have that  
problem ... oh well.

Martin

On Jun 1, 2005, at 2:15 PM, Chris Hill wrote:

> Martin,
>
>  Not sure what is wrong. Can you compare your qnet with monthly
> clmatologies here
>
> http://ingrid.mit.edu/SOURCES/.DASILVA/.SMD94/.climatology/.netheat/ 
> figviewer.html?map.url=X+Y+fig-+colors+-fig
>
>  and an annual average here
>
> http://ingrid.mit.edu/SOURCES/.DASILVA/.SMD94/.climatology/.netheat/ 
> figviewer.html?map.url=X+Y+fig-+colors+-fig
>
> Chris
>
>
> On 6/1/05, Martin Losch <mlosch at awi-bremerhaven.de> wrote:
>> Hi,
>> I found a problem in the forcing data that may concern the suite of
>> experiments that are based on global_ocean.90x40x15, but I am not  
>> sure:
>>
>> The ncep forcing fields in global_ocean.90x40x15 are derived from NCEP
>> data that I (or someone else) downloaded from the LDEO climate data
>> server in 2001 or 2002 (can't remember). I can no longer find them
>> there, but that's a different story. The download data is in
>> fjord.mit.edu:/data3/mlosch/ncep_data
>> as netcdf files. There's also a matlab-script that reads the data and
>> create flux files such as ncep_qnet.bin for a global_ocean.90x40x15
>> configuration (or whatever configuration you prescribe in the  
>> structure
>> grd). I defined qnet as the sum of solar radiation, long wave flux,
>> latent heat flux and sensible heat flux.
>>
>> When you integrate the temporal mean of qnet zonally and cumulatively
>> integrate it meridionally you should get the implied ocean heat flux  
>> as
>> a function of latitude, that you than can compare to Trenberth+Caron
>> 2001, J.Clim, for example. Unfortunately this curve hardly gives any
>> poleward heat flux in the southern hemisphere (other than
>> Trenberth+Caron etc. find), so I assume, something went wrong there. I
>> repeated the computations with the "raw" data from the netcdf files in
>> /data3/mlosch/ncep_data, but the result is the same: hardly any
>> poleward heat flux in the Southern hemisphere. (I am attaching a  
>> figure
>> for the computation on the 90x40x15 grid to give you an idea what I
>> mean, never mind the additional lines on that plot). Where do I go
>> wrong?
>>
>> Martin
>>
>>
>>
>>
>>
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>>
>>
>>
>
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