<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I'm running the most recent version of WRFDA, and I had a few questions. I'm cycling hourly with conventional observations, and after several hours of assimilating, I'm getting artifacts around the boundaries, and so I figured I must be doing the boundary conditions wrong. Right now, the way that I have my scripts set up, I first copy my wrfbdy_d01 and wrfinput_d01 from the last hour's run to my WRFDA run folder, and link the most recent wrfout_d01 to the file "./fg", and the proper obs*.3DVAR to ob.ascii.<div><br></div><div>Then I copy a file I called "parame.in.lower" to "parame.in" and run da_update_bc.exe. These are the contents of parame.in.lower:</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">&control_param</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">da_file<span class="Apple-tab-span" style="white-space:pre"> </span> = './fg'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">wrf_input = './wrfinput_d01'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">wrf_bdy_file<span class="Apple-tab-span" style="white-space:pre"> </span>= './wrfbdy_d01'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">domain_id = 1</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">debug <span class="Apple-tab-span" style="white-space:pre"> </span> = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">cycling = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">update_lateral_bdy = .false.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">update_low_bdy <span class="Apple-tab-span" style="white-space:pre"> </span> = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">low_bdy_only = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">iswater <span class="Apple-tab-span" style="white-space:pre"> </span> = 16</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">/</div></div><div><br></div><div>After that I run da_wrfvar.exe, and then copy another file parame.in.lateral to parame.in. These are the contents of parame.in.lateral:</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">&control_param</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">wrfvar_output_file = './wrfvar_output'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">wrf_bdy_file = './wrfbdy_d01'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">wrf_input = './wrfinput_d01'</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">domain_id = 1</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">cycling = .true. </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">debug = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">update_lateral_bdy = .true.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">update_low_bdy = .false.</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">low_bdy_only = .false. </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">update_lsm = .false. </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 18px/normal Monaco; ">/</div></div><div><br></div><div>Is there something I'm missing that would account for the boundary effects I'm seeing? The "obs" are really just taken from another set of WRF runs, so noise is not really an issue.</div><div><br></div><div><br></div><div><br></div><div>Sean Crowell</div></body></html>