Hi Dilip,<br>The problem you mentioned at your second point is coming from the conv_bin.f&nbsp; routine in AEROSOL/orig. There is a mistake in the&nbsp; conversion factors : ! kg/yr/1x1 cell ==&gt; kg/m2/s, have a look in the file attached ( from the previous version) and replace accordingly the coefficients&nbsp; a(i,j)=a(i,j)/(0.5*(ax1+ax2)*by)/86400/365&nbsp;&nbsp; in conv_bin.f&nbsp; by the corresponding one in the file attached, this will deal with the second point.&nbsp; The problem you mentioned in point one which has been dealt before however if it remains let me know then i will send to you my Main which works.<br><br>Best regards<br><br><br>Konare<br><b><i>Dilip Ganguly &lt;dganguly@prl.res.in&gt;</i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"> Hi everyone,<br><br>As pointed out by Solmon, I have made the correction in my<br>RegCM/Main/aermix.f code. However, even after making this
 change, I am<br>getting exactly the same result as my previous model output obtained<br>without incorporating this correction.<br><br>I am surprised to find that the values of aerosol extinction (aext8) and<br>all other tracer mixing ratios are exactly same at all atmospheric levels.<br>There is absolutely no difference in their magnitudes at different heights<br>(sigma pressure levels). This is not expected and it can not be true.<br><br>Another surprising thing which I have noticed is that aerosol extinction<br>values are controlled by the dust loading alone. None of the other tracers<br>such as BC or OC seem to have any affect on the aerosol extinction.<br>Aerosol extinction values (aext8) obtained from RegCM simulation are<br>unbelievably low over the regions where there is high column burden of BC<br>and OC aerosols. This is a contradiction. I am not able to understand if I<br>am making any mistakes while setting various parameters in my simulations<br>or BC/OC
 aerosols simulated by the model does not radiatively interact in<br>the RegCM3 model and hence it is not possible to study the effect of these<br>aerosols on climate using the present version of the model.<br><br>I have attached my domain.param and regcm.in files along with this mail so<br>that it may be checked if I have set all the parameters correctly for<br>including dust/aerosols in my model simulation.<br><br>I made following changes in the RegCM/Main/parame file to include all the<br>ten tracers<br><br>integer ntr                      ! tracer number<br>      parameter( ntr = 10)<br>      integer nbin                     ! bins number ( dust)<br>      parameter(nbin = 4)<br>--------------------------------------------------------------------------------------------<br><br>Can anybody tell, what is going wrong in my RegCM3 aerosol simulation.<br><br>Thanks in advance.<br><br>Dilip.<br><br><br>-- <br>Dr. Dilip Ganguly<br>Postdoctoral Fellow<br>Space and Atmospheric
 Sciences Division<br>Physical Research Laboratory<br>Navrangpura<br>Ahmedabad-380009<br>Gujarat, India<br>Phone:+91 79 26314558, Fax: +91 79 26314659<br>Alternate Email: ganguly.dilip@gmail.com<br>visit me at: http://www.prl.res.in/~dganguly_______________________________________________<br>RegCNET mailing list<br>RegCNET@lists.ictp.it<br>https://lists.ictp.it/mailman/listinfo/regcnet<br></blockquote><br><p>&#32;

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