<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"><style>body { line-height: 1.5; }body { font-size: 10.5pt; font-family: ????; color: rgb(0, 0, 0); line-height: 1.5; }</style></head><body>
<div><span></span><div style="font-family: 'Microsoft YaHei UI', Tahoma; font-size: 16px;"><font face="Times New Roman">Dear Sir<span style="line-height: 19px; background-color: window;">,</span></font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma; font-size: 16px;"><font face="Times New Roman"><span style="line-height: 19px; background-color: window;"><br></span></font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma; font-size: 16px;"><font face="Times New Roman"><span style="line-height: 19px; background-color: window;">I'm a researcher from Nanjing University, China. My study focused on the numerical simulation of aerosol-radiation feedbacks with the WRF-Chem model. </span></font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma; font-size: 16px;"><font face="Times New Roman"><span style="line-height: 19px; background-color: window;"><br></span></font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><span style="font-family: 'Times New Roman'; font-size: 16px; line-height: 19px; background-color: window;">Recently, I noticed that several new radiation options (aer_opt, aer_aod550_opt, aer_angexp_opt...) had been added in WRF-Chem to provide user-specified aerosol optical properties for RRTMG and Goddard radiation options. But, at the same time, in the chemical modules, the aerosol optical properties are calculated online based on Mie theory and simulated aerosol burden to provide feedbacks to radiation schemes. I was quite curious about which scheme ("aer_opt" or Mie theory) is</span><span style="line-height: 19px;"><font size="3" face="Times New Roman"> </font></span><span style="line-height: 1.5;"><font size="3" face="Times New Roman">preferential in the WRF-Chem simulation. I guess the "aer_opt" option is only available with the WRF meteorological simulation?</font></span></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><span style="line-height: 1.5;"><font size="3" face="Times New Roman"><br></font></span></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><span style="line-height: 1.5;"><font size="3" face="Times New Roman">I hope you can help me better understand the question. Look forward to hearing from you. Thanks very much.</font></span></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><span style="line-height: 1.5;"><font size="3" face="Times New Roman"><br></font></span></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><font face="Times New Roman" size="3">Best regards.</font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><font face="Times New Roman" size="3"><br></font></div><div style="font-family: 'Microsoft YaHei UI', Tahoma;"><font face="Times New Roman" size="3">Mengmeng Li</font></div></div>
<div><br></div><hr style="width: 210px; height: 1px;" color="#b5c4df" size="1" align="left">
<div><span><div style="MARGIN: 10px; FONT-FAMILY: verdana; FONT-SIZE: 10pt"><div>mengmengli2006@126.com</div></div></span></div>
</body></html>