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<body class='hmmessage'><div dir='ltr'><br>Can I do spectral nudging for water vapor in WRF? <br><br>I did 2 runs, one setting "gq = 0" and the other one with "gq = 1.0E-5"<br>The 2 runs turned out to be identical. <br><br>I checked the code<br> SUBROUTINE spectral_nudging(grid,itimestep,dt,xtime,id,analysis_interval, end_fdda_hour, &<br> if_no_pbl_nudging_uv, if_no_pbl_nudging_t, if_no_pbl_nudging_ph,&<br> if_zfac_uv, k_zfac_uv, dk_zfac_uv, &<br> if_zfac_t, k_zfac_t, dk_zfac_t, &<br> if_zfac_ph, k_zfac_ph, dk_zfac_ph, &<br> guv, gt, gph, <br><br><br>appears gq is not even passed in. <br><br>So I guess the current WRF can not do spectral nudging for water vapor. <br><br>Could anybody confirm? <br><br>Thanks<br><br>Xiaoming <br><br><br> </div></body>
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