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使用WRF-Chem V4.1 对北京地区进行模拟,但是风速始终是低估10%——25%左右。我尝试了不同的物理参数化方案,以及2015、2019、2020年不同月份,都是低估。我感到很困惑,wrf对风速的模拟不是一向高估吗?!怎么我模拟的都是低估。
以下为我的物理参数化方案,气象数据用的是fnl,不同的pbl方案也试过了,都是低估。想请大佬们给点意见和建议,谢谢!
&physics
mp_physics = 2, 2, 6,
progn = 1,
ra_lw_physics = 4, 4, 1,
ra_sw_physics = 4, 4, 1,
radt = 30, 30, 4,
sf_sfclay_physics = 1, 1, 1,
sf_surface_physics = 2, 2, 2,
bl_pbl_physics = 1, 1, 1,
bldt = 0, 0, 0,
cu_physics = 5, 5, 1,
cu_diag = 1, 1,
cudt = 5, 5, 5,
isfflx = 1,
ifsnow = 1,
icloud = 1,
surface_input_source = 3,
num_soil_layers = 4,
sf_urban_physics = 0,
num_land_cat = 21,
num_soil_cat = 16,
slope_rad = 1, 1, 1,
topo_shading = 1, 1, 1,
shadlen = 30000.,
mp_zero_out = 2,
mp_zero_out_thresh = 1.e-8
maxiens = 1,
maxens = 3,
maxens2 = 3,
maxens3 = 16,
ensdim = 144,
sst_update = 0,
cu_rad_feedback = .true.
/
&noah_mp
opt_crs = 1,
opt_sfc = 1,
opt_btr = 1,
opt_run = 3,
opt_crop = 1,
/
&fdda
grid_fdda = 1, 0, 0,
gfdda_inname = "wrffdda_d<domain>",
gfdda_end_h = 24000, 36, 36,
gfdda_interval_m = 360, 360, 360,
fgdt = 0, 0, 0,
if_no_pbl_nudging_uv = 0, 1, 1,
if_no_pbl_nudging_t = 0, 1, 1,
if_no_pbl_nudging_q = 0, 1, 1,
if_zfac_uv = 0, 0, 1,
k_zfac_uv = 10, 10, 1,
if_zfac_t = 0, 0, 1,
k_zfac_t = 10, 10, 1,
if_zfac_q = 0, 0, 1,
k_zfac_q = 10, 10, 1,
guv = 0.0003, 0.0003, 0.0003,
gt = 0.0003, 0.0003, 0.0003,
gq = 0.0003, 0.0003, 0.0003,
if_ramping = 1,
dtramp_min = 60.0,
io_form_gfdda = 2,
/
&dynamics
w_damping = 1,
diff_opt = 1,
km_opt = 4,
sfs_opt = 0, 0, 0,
diff_6th_opt = 2,2,
diff_6th_factor = 0.10,
base_temp = 290.,
damp_opt = 3,
zdamp = 5000., 5000., 5000.,
dampcoef = 0.05, 0.05, 0.05,
khdif = 0, 0, 0,
kvdif = 0, 0, 0,
non_hydrostatic = .true.,.true.,.true.,
mix_full_fields = .true.,.true.,.true.,
h_mom_adv_order = 5,
v_mom_adv_order = 3,
h_sca_adv_order = 5,
v_sca_adv_order = 3,
moist_adv_opt = 1, 1, 1,
scalar_adv_opt = 1, 1, 1,
use_baseparam_fr_nml = .true.
gwd_opt = 0,
/
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