About the boundary setting of the simulation area of the WRF

[runde]

我想咨询大家！当嵌套在两层中时，父区域边界是否应该避开青藏高原带？我已将子区域设置为中国的华北平原，当我模拟降雨时，我发现降雨中心的位置总是发生很大的偏移。矛盾的是，我的子区域足够大，如果我减少父区域的边界，它可能会影响模拟。

 

[Ming Chen]

The lateral boundaries of WRF domain, no matter it is a parent domain or a child domain, should be located over relatively flat terrain area and avoid steep topography.

 

[runde]

The lateral boundaries of WRF domain, no matter it is a parent domain or a child domain, should be located over relatively flat terrain area and avoid steep topography.

Thank you for your reply! Due to the large lateral extent of the desired region, I set the dx to 27000, which leads to the fact that no matter how much the parent domain is expanded, its left border will inevitably lie on the Tibetan Plateau. Unless it is narrowed down to the vicinity of the subdomain, or expanded to cover the entire Tibetan Plateau. Perhaps you have a better suggestion?
Here are the boundaries of the subdomain as close as possible to the chosen study area:
&geogrid

parent_id = 1,
parent_grid_ratio = 3,
i_parent_start = 26,
j_parent_start = 23,
e_we = 172,
e_sn = 121,
dx = 27000,
dy = 27000,
map_proj = 'lambert',
ref_lat = 36.1,
ref_lon = 114.0,
truelat1 = 37.5,
truelat2 = 37.5,
stand_lon = 111.4,

 

[Ming Chen]

I would suggest you reduce the size of D01, and makes it located to the east and north of the Plateau. Personally I think this is more feasible.

But you need to consider the case you intend to study and the dominant synoptic systems that affect the area of your interest, then decide where you domain should be located.