<div dir="ltr">Hi Zhixuan,<div>You're a bit confused.</div><div><br></div><div>e_we and e_sn are the domain dimensions. in X and Y.</div><div><span style="font-size:12.8px">geog_data_res is the resolution of the input data.</span><br></div><div><span style="font-size:12.8px">dx and dy are the resolution of the main domain.</span></div><div><span style="font-size:12.8px">parent_grid_ratio is the ratio starting from the main domain.</span><br></div><div><span style="font-size:12.8px"><br></span></div><div><span style="font-size:12.8px">As example:</span></div><div><span style="font-size:12.8px"><br></span></div><div><div><span style="font-size:12.8px"> parent_id = 1,1,2,</span></div><div><span style="font-size:12.8px"> parent_grid_ratio = 1,3,3, (resolution of each domain: 27km, 9km, 3km)</span></div><div><span style="font-size:12.8px"> i_parent_start = 1,20,15,</span></div><div><span style="font-size:12.8px"> j_parent_start = 1,35,15,</span></div><div><span style="font-size:12.8px"> e_we = 100,75,60 (domain dimensions: 100x100, 75x75, 60x60 everyone in grid points)</span></div><div><span style="font-size:12.8px"> e_sn = 100,75,60</span></div><div><span style="font-size:12.8px"> geog_data_res = '10m','5m','2m', (input resolution for each domain)</span></div><div><span style="font-size:12.8px"> dx = 27000, (first domain resolution)</span></div><div><span style="font-size:12.8px"> dy = 27000,</span></div></div><div><span style="font-size:12.8px"><br></span></div></div><div class="gmail_extra"><br><div class="gmail_quote">2016-09-03 17:57 GMT-03:00 Zhixuan Cao <span dir="ltr"><<a href="mailto:hitcaozx@gmail.com" target="_blank">hitcaozx@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi<br>
I feel confused on the exact meaning of some parameters in namelist.wps, following user manual can not solve my confusion. Could someone give me some advice on this?<br>
<br>
Here do these following parameters work together to determine the resolution of grids for nested domain simulation?<br>
parent_grid_ratio<br>
i_parent_start<br>
j_parent_start<br>
e_we<br>
e_sn<br>
geog_data_res<br>
<br>
1) If geog_data_res gives resolution of grid, then it seems that I do not need e_we and e_sn.<br>
2) For nested domain simulation, should geog_data_res be consistent with parent_grid_ratio? For example, if parent_grid_ratio = 1, 3 then geog_data_res has to be something like geog_data_res = 9m, 3m.<br>
3) In the tutorial, it says that ( e_we = n* parent_grid_ratio +1) and ( e_sn = n* parent_grid_ratio +1). I guess I can use different n for e_we and e_sn. Am I right? But is there any constrain on n besides that n has to be a positive integer?<br>
<br>
Thank you very much!<br>
<br>
Zhixuan Cao<br>
<br>
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