[RegCNET] dust bin size in regcm.in

[Zakey Ashraf_Saber]

Hi Marc,


   Let us circulate the information to RegCNET too. Yes, the first four
numbers are the lower bounds of the size bin and the last four are the
upper bounds in dustbsiz.

    In fact, our size range up to 40 micrometers as upper limits. If you
would like to have more than 20 micrometers you will need to increase
the upper limit of the size range, see the variable (AEROSIZE) in
dsflx.F.


    Over the African desert we got something around -50 W/m2. Did you
check correctly the dust sources in your domain? Also, did you compare
the first level concentrations from the model with observation?  It is
very important to have validated concentration and mass burden over
your domain.

Best regards,
Ashraf --



> Hi Ashraf,
>
> Sorry to bother you yet again.  However, I'm checking in
> regcm.in_4dust and i see the following:
>
> dustbsiz= 0.01 1.00, 2.50, 5.00, 1.00, 2.50, 5.00, 20.00,
>
> where the dust bin sizes are supposed to be 0.01-1.00, 1.00-2.50,
> 2.50-5.00, 5.00-20.00
>
> Im assuming the first four numbers are the lower bounds of the bin
> sizes and the last four are the upper bounds in dustbsiz=....?
>
> or, do i have this incorrect and therefore my regcm.in is wrong?
>
> Also, is it possible to include dust particles with diameters larger
> than 20 micrometers?  I am seeing way too much shortwave incoming over
> my desert region (Middle East) and I think it may be due to dust.  i
> see some reduction ~10 W/m2 with the above configuration of dustbsiz,
> but was hoping for more.  As well as more cooling from even this 10W/
> m2 (only seeing .3C cooling)  well if you have any insight into the
> matter that would be very useful...thanks so much!!
>
> Marc
>
>


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