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| 6 | <title>PALM chapter 3.5.3</title> |
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| 8 | <meta name="AUTHOR" content="Siegfried Raasch"> |
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| 19 | <h3 style="line-height: 100%;">3.5.3 Definition of user-defined |
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| 20 | subdomains</h3> |
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| 21 | <p style="line-height: 100%;">By default, the values of the time |
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| 22 | series (saved in local file <a href="chapter_3.4.html#PLOTTS_DATA">PLOTTS_DATA</a>) |
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| 23 | and the horizontally averaged vertical profiles (saved in local files |
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| 24 | <a href="chapter_3.4.html#PLOT1D_DATA">PLOT1D_DATA</a> |
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| 25 | and <a href="chapter_3.4.html#LIST_PROFIL">LIST_PROFIL</a>) |
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| 26 | always refer to the total model domain. Independently, up to 9 time |
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| 27 | series or profiles for different user-defined subdomains can be |
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| 28 | computed and plotted additionally. Steering in principle is done |
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| 29 | via the initialization parameter <a |
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| 30 | href="chapter_4.1.html#statistic_regions">statistic_regions</a>. |
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| 31 | </p> |
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| 32 | <p style="line-height: 100%;">The exact definition of these subdomains |
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| 33 | has to be made by the user within the user-defined subroutine |
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| 34 | <tt><font style="font-size: 10pt;" size="2">init_user</font></tt>. The |
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| 35 | subdomains are defined with a mask array named <tt><font |
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| 36 | style="font-size: 10pt;" size="2">rmask</font></tt>, |
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| 37 | which has to be given the value 1.0 for all horizontal grid points |
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| 38 | belonging to |
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| 39 | the user-defined subdomain and the value 0.0, where grid points do not |
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| 40 | belong |
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| 41 | to the user-defined subdomain. In the model <tt><font size="2">rmask</font></tt> |
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| 42 | is |
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| 43 | declared as: </p> |
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| 44 | <ul> |
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| 45 | <p style="line-height: 100%;"><tt><font style="font-size: 10pt;" |
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| 46 | size="2">REAL :: rmask (nys-1:nyn+1,nxl-1,nxr+1,0:9) .</font></tt></p> |
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| 47 | </ul> |
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| 48 | <p style="line-height: 100%;">The first two indices are the grid point |
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| 49 | indices in y and x-direction. With parallel model runs <tt><font |
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| 50 | style="font-size: 10pt;" size="2">nxl</font></tt><font |
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| 51 | style="font-size: 10pt;" size="2">, |
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| 52 | </font><tt><font style="font-size: 10pt;" size="2">nxr</font></tt><font |
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| 53 | style="font-size: 10pt;" size="2">, |
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| 54 | </font><tt><font style="font-size: 10pt;" size="2">nys</font></tt><font |
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| 55 | style="font-size: 10pt;" size="2"> |
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| 56 | <font size="3">and</font> </font><tt><font style="font-size: 10pt;" |
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| 57 | size="2">nyn</font></tt> |
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| 58 | are the array bounds of the respective subdomain (don't confuse this |
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| 59 | with the user-defined subdomain!) on the |
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| 60 | respective processor. With runs on one processor <tt><font |
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| 61 | style="font-size: 10pt;" size="2">nys</font></tt><font |
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| 62 | style="font-size: 10pt;" size="2"> |
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| 63 | = </font><tt><font style="font-size: 10pt;" size="2">nxl</font></tt><font |
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| 64 | style="font-size: 10pt;" size="2"> |
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| 65 | = 0</font> and <font style="font-size: 10pt;" size="2"><font |
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| 66 | face="Cumberland, monospace">nxr |
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| 67 | =</font> </font><a href="chapter_4.1.html#nx">nx</a> |
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| 68 | and <font style="font-size: 10pt;" size="2"><font |
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| 69 | face="Cumberland, monospace">nyn |
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| 70 | =</font></font> <a href="chapter_4.1.html#ny">ny</a>. |
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| 71 | The third index determines the user-defined subdomain. The total model |
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| 72 | domain |
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| 73 | carries the index 0, the user-defined subdomains have the values 1 to |
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| 74 | 9. </p> |
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| 75 | <p style="line-height: 100%;">The following example should illustrate |
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| 76 | this. Two subdomains are defined by the user. The first is determined |
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| 77 | by all grid |
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| 78 | points which lie within a circle whose center is equal to the |
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| 79 | (horizontal) center of the model domain and whose diameter is equal |
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| 80 | to half of the total horizontal domain size (square total domain |
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| 81 | assumed). |
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| 82 | The second subdomain should be defined by all points outside of this |
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| 83 | domain. This may be obtained by the following lines of code in <tt><font |
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| 84 | style="font-size: 10pt;" size="2">user_init</font></tt>: |
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| 85 | </p> |
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| 86 | <ul> |
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| 87 | <p style="line-height: 100%;"><tt><font style="font-size: 10pt;" |
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| 88 | size="2"><font face="Cumberland, monospace">USE |
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| 89 | grid_variables</font></font></tt><font style="font-size: 10pt;" size="2"><font |
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| 90 | face="Cumberland, monospace"> <br> |
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| 91 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 92 | face="Cumberland, monospace">USE indices</font></font></tt><font |
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| 93 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 94 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 95 | face="Cumberland, monospace">USE statistics</font></font></tt><font |
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| 96 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 97 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 98 | face="Cumberland, monospace">.</font></font></tt><font |
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| 99 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 100 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 101 | face="Cumberland, monospace">.</font></font></tt><font |
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| 102 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 103 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 104 | face="Cumberland, monospace">.</font></font></tt><font |
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| 105 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 106 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 107 | face="Cumberland, monospace">disc_center_x = dx * (nx + 1)/2</font></font></tt><font |
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| 108 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 109 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 110 | face="Cumberland, monospace">disc_center_y = dy * (ny + 1)/2</font></font></tt><font |
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| 111 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 112 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 113 | face="Cumberland, monospace">disc_radius = 0.5 * disc_center_x</font></font></tt><font |
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| 114 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 115 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 116 | face="Cumberland, monospace">DO i = nxl-1, nxr+1</font></font></tt><font |
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| 117 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 118 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 119 | face="Cumberland, monospace"> x = i * dx</font></font></tt><br> |
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| 120 | <tt><font style="font-size: 10pt;" size="2"><font |
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| 121 | face="Cumberland, monospace"> DO j = nys-1, nyn+1</font></font></tt><font |
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| 122 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 123 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 124 | face="Cumberland, monospace"> y = j * dy</font></font></tt><font |
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| 125 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 126 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 127 | face="Cumberland, monospace"> |
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| 128 | radial_distance = SQRT( ( x - disc_center_x )**2 + &</font></font></tt><font |
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| 129 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 130 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 131 | face="Cumberland, monospace"> |
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| 132 | ( y - disc_center_y )**2 )</font></font></tt><font |
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| 133 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 134 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 135 | face="Cumberland, monospace"> IF ( radial_distance |
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| 136 | > disc_radius ) THEN</font></font></tt><font |
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| 137 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 138 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 139 | face="Cumberland, monospace"> |
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| 140 | rmask(j,i,1) = 0.0</font></font></tt><font style="font-size: 10pt;" |
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| 141 | size="2"><font face="Cumberland, monospace"><br> |
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| 142 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 143 | face="Cumberland, monospace"> |
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| 144 | rmask(j,i,2) = 1.0</font></font></tt><font style="font-size: 10pt;" |
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| 145 | size="2"><font face="Cumberland, monospace"><br> |
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| 146 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 147 | face="Cumberland, monospace"> ELSE</font></font></tt><font |
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| 148 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 149 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 150 | face="Cumberland, monospace"> |
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| 151 | rmask(j,i,1) = 1.0</font></font></tt><font style="font-size: 10pt;" |
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| 152 | size="2"><font face="Cumberland, monospace"><br> |
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| 153 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 154 | face="Cumberland, monospace"> |
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| 155 | rmask(j,i,2) = 0.0</font></font></tt><font style="font-size: 10pt;" |
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| 156 | size="2"><font face="Cumberland, monospace"><br> |
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| 157 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 158 | face="Cumberland, monospace"> ENDIF</font></font></tt><font |
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| 159 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"> <br> |
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| 160 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 161 | face="Cumberland, monospace"> ENDDO</font></font></tt><font |
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| 162 | style="font-size: 10pt;" size="2"><font face="Cumberland, monospace"><br> |
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| 163 | </font></font><tt><font style="font-size: 10pt;" size="2"><font |
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| 164 | face="Cumberland, monospace">ENDDO</font></font></tt></p> |
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| 165 | </ul> |
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| 166 | <p style="line-height: 100%;">The module <span |
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| 167 | style="font-family: monospace;">statistics</span> must be used, |
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| 168 | because it contains <span style="font-family: monospace;">rmask</span> |
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| 169 | and the modules <span style="font-family: monospace;">grid_variables</span> |
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| 170 | and <span style="font-family: monospace;">indices</span> are |
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| 171 | necessary in this example, because grid spacing and indices are used. |
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| 172 | All array elements of <span style="font-family: monospace;">rmask</span> |
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| 173 | (<span style="font-family: monospace;">rmask(:,:,:)</span>) are preset |
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| 174 | by the model with 1.0. In no case this assignment must be |
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| 175 | changed for the total domain (<span style="font-family: monospace;">rmask(:,:,0)</span>)! |
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| 176 | Computations and output for the user-defined subdomains only take place |
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| 177 | if |
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| 178 | the user sets <a href="chapter_4.1.html#statistic_regions">statistic_regions</a> |
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| 179 | ≥ <i>1</i>. Beyond that, names for the user-defined subdomains can be |
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| 180 | assigned |
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| 181 | via the initialization parameter <a href="chapter_4.3.html#region">region</a>. |
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| 182 | Output of the names of the selected user-defined subdomains happens in |
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| 183 | the local files <a href="chapter_3.4.html#HEADER">HEADER</a> |
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| 184 | and <a href="chapter_3.4.html#RUN_CONTROL">RUN_CONTROL</a> |
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| 185 | within the user-defined subroutine <tt><font style="font-size: 10pt;" |
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| 186 | size="2">user_header</font></tt>. |
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| 187 | <br> |
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| 188 | </p> |
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| 189 | <hr> |
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| 190 | <p style="line-height: 100%;"><br> |
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| 191 | <font color="#000080"><font color="#000080"><a href="chapter_3.5.2.html"><font |
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| 192 | color="#000080"><img src="left.gif" name="Grafik1" align="bottom" |
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| 193 | border="2" height="32" width="32"></font></a><a href="index.html"><font |
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| 194 | color="#000080"><img src="up.gif" name="Grafik2" align="bottom" |
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| 195 | border="2" height="32" width="32"></font></a><a |
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| 196 | href="chapter_3.5.4.html"><font color="#000080"><img src="right.gif" |
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| 197 | name="Grafik3" align="bottom" border="2" height="32" width="32"></font></a></font></font></p> |
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| 198 | <p style="line-height: 100%;"><i>Last change: </i> 15/04/05 (SR)</p> |
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