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[129]	3	<meta http-equiv="CONTENT-TYPE" content="text/html; charset=windows-1252"><title>PALM chapter 3.5.4</title> <meta name="GENERATOR" content="StarOffice 7 (Win32)"> <meta name="AUTHOR" content="Siegfried Raasch"> <meta name="CREATED" content="20040802;14050943"> <meta name="CHANGED" content="20041117;12180008"> <meta name="KEYWORDS" content="parallel LES model"> <style>
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	8	<body style="direction: ltr;" lang="en-US"><h3 style="line-height: 100%;"><font size="4">3.5.4
	9	User-defined output quantities<br>
	10	</font></h3>A very typical request of users is the
	11	calculation and
[5]	12	output of
	13	quantities which are not part of PALM's standard output. The basic user
	14	interface includes a number of subroutines which allow the calculation
[144]	15	of user-defined quantities and output of these quantities as 1.
	16	(horizontally averaged) <a href="#vertical_profiles">vertical
	17	profiles</a>, 2. <a href="#time_series">time
	18	series</a>, 3. <a href="#2D_and_3D">2d cross
	19	section</a> or <a href="#2D_and_3D">3d volume data</a>,
	20	4. <a href="#dvrp">dvrp</a> objects, and 5. <a href="#spectra">spectra</a>. The respective
	21	subroutines
	22	contain sample code lines (written as comment lines) for defining,
	23	calculating and
	24	output of such quantities.<br><br>Output times, averaging
	25	intervals, etc. are steered by the same variables as used for the
	26	standard PALM output quantities, e.g. <a href="chapter_4.2.html#dt_data_output">dt_data_output</a>.<br><br>The
	27	following five parts of this chapter explains step-by-step how
	28	to modify/extend the
[212]	29	respective default user interface subroutines in order to generate the respective
[144]	30	output:<br><ol><li>(horizontally averaged) <a href="chapter_3.5.4.html#vertical_profiles">vertical profiles</a>, </li><li><a href="chapter_3.5.4.html#time_series">time series</a>, </li><li><a href="chapter_3.5.4.html#2D_and_3D">2d cross
	31	section</a> or <a href="chapter_3.5.4.html#2D_and_3D">3d
	32	volume data</a>, </li><li><a href="chapter_3.5.4.html#dvrp">dvrp</a> objects,
	33	and </li><li><a href="chapter_3.5.4.html#spectra">spectra</a>.</li></ol><br><h4><a name="vertical_profiles"></a>1. Output of user-defined
	34	vertical profiles</h4>This example shows the output of the
	35	quantity "turbulent resolved-scale horizontal momentum flux" (uv). If
	36	more than one user-defined
	37	quantity shall be output, the following steps have to be carried out in
	38	the
[89]	39	same way for each of the quantities.<br><br><ol><li>The
	40	quantity has to be given a unique string identifier, e.g. <span style="font-style: italic;">'uv'</span>.
	41	This identifier must be different from the identifiers used for the
	42	PALM standard output (see list in description of parameter <a href="chapter_4.2.html#data_output_pr">data_output_pr</a>).
	43	To switch on output of this quantity, the user has to assign the string
	44	identifier to the parameter <a href="chapter_4.3.html#data_output_pr_user">data_output_pr_user</a>,
	45	eg.:<br><br><span style="font-family: monospace;">
	46	data_output_pr_user</span> = <span style="font-style: italic;">'uv'</span>,<span style="font-style: italic;"></span><span style="font-style: italic;"></span><span style="font-style: italic;"></span><span style="font-style: italic;"></span><span style="font-style: italic;"></span><span style="font-style: italic;"></span><br><br></li><li>For
	47	the
	48	quantity, an identification number, a physical unit, and the vertical
[144]	49	grid on which it is defined (u- or w-grid), has to be assigned
	50	(subroutine <a href="chapter_3.5.1.html#user_check_data_output_pr"><span style="font-family: monospace;">user_check_data_output_pr</span></a>):<span style="font-family: monospace;"><br><br>
	51	CASE (
	52	'uv' )<br></span><span style="font-family: monospace;">
	53	index = pr_palm + <span style="color: rgb(255, 0, 0);">1<span style="color: rgb(0, 0, 0);">
	54
	55
	56
	57
	58	! identification number</span></span><br>
	59	dopr_index(var_count) = index<br>
	60	dopr_unit(var_count)  = '<span style="color: rgb(255, 0, 0);">m2/s2</span>'
	61
	62
	63	!
	64	physical unit<br>
	65	hom(:,2,index,:)      = SPREAD( <span style="color: rgb(255, 0, 0);">zu</span>, 2,
	66	statistic_regions+1 )    ! vertical grid<br></span><br>Here
	67	only the those parts in <span style="color: rgb(255, 0, 0);">red</span>
	68	color have to be given by the user appropriately.<br>The
	69	identification number (<span style="font-family: Courier New,Courier,monospace;">index</span>)
	70	must be within the range [<span style="font-family: Courier New,Courier,monospace;">
	71	pr_palm+1 , pr_palm+max_pr_user</span> ], where <span style="font-family: Courier New,Courier,monospace;">max_pr_user</span>
	72	is the number of user-defined profiles as given by parameter <a href="chapter_4.3.html#data_output_pr_user">data_output_pr_user</a>
	73	in the respective PALM run. The physical unit has to be given
	74	with respect to the NetCDF conventions. If no unit is given,
	75	PALM will abort. The vertical grid has to be either <span style="font-family: Courier New,Courier,monospace;">zu</span>
	76	(u-grid) or <span style="font-family: Courier New,Courier,monospace;">zw</span>
	77	(w-grid).<br><br></li><li>The quantity has to
	78	be calculated for all gridpoints (subroutine <a href="chapter_3.5.1.html#user_statistics">user_statistics</a>):<br><br><span style="font-family: monospace;">    !$OMP
	79	DO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	80	DO  i = nxl, nxr</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	81	DO  j = nys, nyn</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	82	DO  k = nzb_s_inner(j,i)+1, nzt</span><br style="font-family: monospace;"><span style="font-family: monospace;"></span><span style="font-family: monospace;"></span><span style="font-family: monospace;"></span><span style="font-family: monospace;">
	83	sums_l(k,pr_palm+<span style="color: rgb(255, 0, 0);">1</span>,tn)
	84	= sums_l(k,pr_palm+<span style="color: rgb(255, 0, 0);">1</span>,tn)
	85	+
	86	&</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	87	<span style="color: rgb(255, 0, 0);">( 0.5 * ( u(k,j,i) +
	88	u(k,j,i+1) ) - hom(k,1,1,sr) ) * &</span></span><br style="font-family: monospace; color: rgb(255, 0, 0);"><span style="font-family: monospace; color: rgb(255, 0, 0);">
	89	( 0.5 * ( v(k,j,i) + v(k,j+1,i) ) - hom(k,1,2,sr) )   &</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	90	* rmask(j,i,sr)<br>
	91	ENDDO<br>
	92	ENDDO<br>    ENDDO<br></span><br style="font-family: monospace;">Once again, only those parts
	93	in <span style="color: rgb(255, 0, 0);">red</span>
	94	have to be adjusted by the user.<br>The
[89]	95	turbulent resolved-scale momentum flux uv is defined as the product
	96	of the deviations of the horizontal velocities from their respective
	97	horizontally averaged mean values. These mean values are stored in
[144]	98	array <span style="font-family: Courier New,Courier,monospace;">hom(..,1,1,sr)</span>
	99	and <span style="font-family: Courier New,Courier,monospace;">hom(..,1,2,sr)</span>
	100	for the u- and v-component, respectively. Since due to the staggered
	101	grid, <span style="font-family: Courier New,Courier,monospace;">u</span>
	102	and <span style="font-family: Courier New,Courier,monospace;">v</span>
[89]	103	are not defined at the same gridpoints, they have to be interpolated
	104	appropriately (here to the center of the gridbox). The result of the
	105	calculation is stored in array <span style="font-family: Courier New,Courier,monospace;">sums_l</span>.
	106	The second index of this array is the identification number of the
[144]	107	profile which must match the one given in the previous step 2.</li></ol><br><h4><a name="time_series"></a>2. Output of user-defined
	108	timeseries</h4>This example shows the output of two time series
	109	for the absolut extremal values of the horizontal velocities <span style="font-style: italic;">u</span> and <span style="font-style: italic;">v</span>. If more than one
	110	user-defined
	111	quantity shall be output, the following steps have to be carried out in
	112	the
	113	same way for each of the quantities.<br><br><ol><li>For
	114	each time series quantity you have to give a label and a unit
	115	(subroutine <a href="chapter_3.5.1.html#user_init">user_init</a>),
	116	which will be used for the NetCDF file. They must not contain more than
	117	seven characters. The value of <code>dots_num</code> has
	118	to be increased by the number of new time series quantities. Its old
	119	value has to be stored in <code>dots_num_palm</code>.<br><br><code>
	120	dots_label(dots_num<span style="color: rgb(255, 0, 0);">+1</span>)
	121	= '<span style="color: rgb(255, 0, 0);">abs_umx</span>'<br>
	122	dots_unit(dots_num<span style="color: rgb(255, 0, 0);">+1</span>)
	123	= '<span style="color: rgb(255, 0, 0);">m/s</span>'<br>
	124	dots_label(dots_num<span style="color: rgb(255, 0, 0);">+2</span>)
	125	= '<span style="color: rgb(255, 0, 0);">abs_vmx</span>'<br>
	126	dots_unit(dots_num<span style="color: rgb(255, 0, 0);">+2</span>)
	127	= '<span style="color: rgb(255, 0, 0);">m/s</span>'<br><br>
	128	dots_num_palm = dots_num<br>
	129	dots_num = dots_num <span style="color: rgb(255, 0, 0);">+
	130	2</span><br><br></code>Only those parts in <span style="color: rgb(255, 0, 0);">red</span> have to be
	131	adjusted by the user.<br><br></li><li>These
	132	quantities are calculated and output in subroutine <a href="chapter_3.5.1.html#user_statistics">user_statistics</a>
	133	for every statistic region <code>sr</code> defined by the
	134	user, but at least for the region <span style="font-style: italic;">"total domain"</span>:<br> <br><code>
	135	ts_value(dots_num_palm+1,sr) = ABS( u_max )<br>
	136	ts_value(dots_num_palm+2,sr) = ABS( v_max )<br></code></li></ol> <br><h4><span style="font-weight: bold;"><a name="2D_and_3D"></a>3.
	137	Output of user-defined 2d cross sections or 3d volume data</span></h4><br>This
	138	example shows the output of the
[87]	139	quantity "square of the u-component" (<span style="font-weight: bold;">Note:</span> this quantity
[5]	140	could of course easily be calculated from the u-component by
	141	postprocessing the PALM output so that calculation within PALM is not
[87]	142	necessarily required). If more than one user-defined
[144]	143	quantity shall be output, the following steps have to be carried out in
	144	the
[62]	145	same way for each of the quantities.<br><br><ol><li>The
	146	quantity has to be given a unique string identifier, e.g. <span style="font-style: italic;">'u2'</span>.
[5]	147	This identifier must be different from the identifiers used for the
[62]	148	PALM standard output (see list in description of parameter <a href="chapter_4.2.html#data_output">data_output</a>).
	149	To switch on output of this quantity, the user has to assign the string
	150	identifier to the parameter <a href="chapter_4.3.html#data_output_user">data_output_user</a>,
	151	eg.:<br><br><span style="font-family: monospace;">
	152	data_output_user</span> = <span style="font-style: italic;">'u2'</span>, <span style="font-style: italic;"> 'u2_xy_av'</span><br><br>The
	153	pure string <span style="font-style: italic;">'u2'</span>
[5]	154	switches on the output of instantaneous 3d volume data. Output of cross
	155	section data and time averaged data is switched on by additionally
[62]	156	appending the strings <span style="font-style: italic;">'_xy'</span>,
	157	<span style="font-style: italic;">'_xz'</span>, <span style="font-style: italic;">'_yz'</span>, and/or <span style="font-style: italic;">'_av'</span> (for a
	158	detailed explanation see parameter <a href="chapter_4.2.html#data_output">data_output</a>).<br><br></li><li>In
	159	order to store the quantities' grid point data within PALM, a 3d data
	160	array has to be declared in module <a href="chapter_3.5.1.html#user"><span style="font-family: monospace;">user</span></a>:<br><br><span style="font-family: monospace;">    REAL,
	161	DIMENSION(:,:,:), ALLOCATABLE ::  u2, u2_av</span><br><br>The
	162	second array <span style="font-family: monospace;">u2_av</span>
[5]	163	is needed in case that output of time averaged data is requested. It is
	164	used to store the sum of the data of the respective time levels over
[62]	165	which the average has to be carried out.<br><br><br></li><li>The
	166	data array has to be allocated in subroutine <a href="chapter_3.5.1.html#user_init"><span style="font-family: monospace;">user_init</span></a>:<br><br><span style="font-family: monospace;">
	167	ALLOCATE( u2(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )</span><br><br>In
[5]	168	case that output of time averaged data is requested, the array
	169	containing the sum has possibly to be read from the restart file (local
[62]	170	filename <a href="chapter_3.4.html#BININ">BININ</a>)
	171	by executing the following code in <span style="font-family: monospace;">user_init</span>:<br><br><span style="font-family: monospace;">
	172	IF ( initializing_actions == 'read_restart_data' )
	173	THEN</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	174	READ ( 13 )  field_chr</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	175	DO  WHILE ( TRIM( field_chr ) /= '*** end
	176	user ***' )</span><br style="font-family: monospace;"><br style="font-family: monospace;"><span style="font-family: monospace;">
	177	SELECT CASE ( TRIM( field_chr ) )</span><br style="font-family: monospace;"><br style="font-family: monospace;"><span style="font-family: monospace;">
	178	CASE ( 'u2_av' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	179	ALLOCATE(
	180	u2_av(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	181	READ ( 13 )  u2_av</span><br style="font-family: monospace;"><br style="font-family: monospace;"><span style="font-family: monospace;">
	182	CASE DEFAULT</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	183	PRINT*,
	184	'+++ user_init: unknown
[5]	185	variable named "', &</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	186
[62]	187
	188	TRIM(
[5]	189	field_chr ), '" found in'</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	190	PRINT*,
	191	'
[62]	192	data from prior run on PE ', myid</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	193
	194	CALL local_stop</span><br style="font-family: monospace;"><br style="font-family: monospace;"><span style="font-family: monospace;">
	195	END SELECT<br>
	196	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	197	ENDIF</span><br style="font-family: monospace;"><br><br></li><li>The
	198	quantity has to be given a unit (subroutine <a href="chapter_3.5.1.html#user_check_data_output"><span style="font-family: monospace;">user_check_data_output</span></a>):<br><br><span style="font-family: monospace;">    CASE (
	199	'u2' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	200	unit = 'm2/s2'</span><br> <br>Otherwise,
	201	PALM will abort.<br><br><br></li><li>The
[5]	202	vertical grid on which the quantity is defined (given by the levels
	203	'zu' or 'zw', on which the u- or w-component of the velocity are
[62]	204	defined) has to be specified for the NetCDF output files in subroutine <a href="chapter_3.5.1.html#user_define_netcdf_grid"><span style="font-family: monospace;">user_define_netcdf_grid</span></a>:<br><br><span style="font-family: monospace;">
	205	CASE ( 'u2', 'u2_xy', 'u2_xz', 'u2_yz' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	206	grid = 'zu'</span><br> <br>As
	207	the example shows, this grid has to be defined for the 3d volume data
	208	as well as for all of the three cross sections.<br><span style="font-family: monospace;"><br><br></span></li><li>After
	209	each timestep, the quantity has to be calculated at all gridpoints and
	210	to be stored. This has to be done in subroutine <a href="chapter_3.5.1#user_actions"><span style="font-family: monospace;">user_actions</span></a>
	211	at location 'after_integration':<br><br><span style="font-family: monospace;">    CASE
	212	( 'after_integration' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">!</span><br style="font-family: monospace;"><span style="font-family: monospace;">!--
	213	Enter actions to be done after every time integration (before</span><br style="font-family: monospace;"><span style="font-family: monospace;">!--
	214	data output)</span><br style="font-family: monospace;"><span style="font-family: monospace;">!--
	215	Sample for user-defined output:</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	216	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	217	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	218	DO  k = nzb, nzt+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	219	u2(k,j,i) = u(k,j,i)**2</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	220	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	221	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	222	ENDDO</span><br><br> <br></li><li>In
[5]	223	case that output of time-averaged data is requested, the sum- and
	224	average-operations as well as the allocation of the sum-array have to
[62]	225	be carried out in subroutine <a href="chapter_3.5.1.html#user_3d_data_averaging"><span style="font-family: monospace;">user_3d_data_averaging</span></a>:<br><br><span style="font-family: monospace;">
	226	IF ( mode == 'allocate' )  THEN<br>
	227	...</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	228	CASE ( 'u2' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	229	IF ( .NOT. ALLOCATED( u2_av ) )  THEN</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	230	ALLOCATE( u2_av(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	231	ENDIF</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	232	u2_av = 0.0<br>    ...</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	233	ELSEIF ( mode == 'sum' )  THEN<br>
	234	...</span><br style="font-family: monospace;"><span style="font-family: monospace;">       CASE
	235	( 'u2' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	236	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	237	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	238	DO  k = nzb, nzt+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	239	u2_av(k,j,i) = u2_av(k,j,i) + u2(k,j,i)</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	240	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	241	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	242	ENDDO<br>    ...</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	243	ELSEIF ( mode == 'average' )  THEN<br>
	244	...</span><br style="font-family: monospace;"><span style="font-family: monospace;">       CASE
	245	( 'u2' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	246	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	247	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	248	DO  k = nzb, nzt+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	249	u2_av(k,j,i) = u2_av(k,j,i) / REAL( average_count_3d )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	250	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	251	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	252	ENDDO</span><br><br> </li><li>For
	253	output of 2d cross sections, the gridpoint data of the quantity has to
	254	be resorted to array <span style="font-family: monospace;">local_pf</span>
	255	in subroutine <a href="chapter_3.5.1.html#user_data_output_2d"><span style="font-family: monospace;">user_data_output_2d</span></a>.
	256	Also the vertical grid, on which the quantity is defined, has to be set
	257	again:<br><br><span style="font-family: monospace;">    CASE
	258	( 'u2_xy', 'u2_xz', 'u2_yz' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	259	IF ( av == 0 )  THEN</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	260	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	261	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	262	DO  k = nzb, nzt+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	263	local_pf(i,j,k) = u2(k,j,i)</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	264	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	265	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	266	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	267	ELSE</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	268	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	269	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	270	DO  k = nzb, nzt+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	271	local_pf(i,j,k) = u2_av(k,j,i)</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	272	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	273	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	274	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	275	ENDIF</span><br style="font-family: monospace;"><br style="font-family: monospace;"><span style="font-family: monospace;">
	276	grid = 'zu'</span><br> <br>The <span style="font-family: monospace;">ELSE</span> case is
	277	only needed in case that output of time-averaged data is requested.<br><br><br></li><li>For
	278	output of 3d volume data, the gridpoint data of the quantity has to be
	279	resorted to array <span style="font-family: monospace;">local_pf</span>
[135]	280	in subroutine <a href="chapter_3.5.1.html#user_data_output_3d"><span style="font-family: monospace;">user_data_output_3d</span></a>.:<br><br><span style="font-family: monospace;">    CASE
[62]	281	( 'u2' )</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	282	IF ( av == 0 )  THEN</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	283	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	284	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	285	DO  k = nzb, nz_do</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	286	local_pf(i,j,k) = u2(k,j,i)</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	287	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	288	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	289	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	290	ELSE</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	291	DO  i = nxl-1, nxr+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	292	DO  j = nys-1, nyn+1</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	293	DO  k = nzb, nz_do</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	294	local_pf(i,j,k) = u2_av(k,j,i)</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	295	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	296	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
	297	ENDDO</span><br style="font-family: monospace;"><span style="font-family: monospace;">
[135]	298	ENDIF</span><br><br>The <span style="font-family: monospace;">ELSE</span> case is
[62]	299	only needed in case that output of time-averaged data is requested.<br><br><br></li><li>In
	300	case of job chains, the sum array has to be written to the (binary)
	301	restart file (local filename <a href="chapter_3.4.html#BINOUT">BINOUT</a>)
	302	in subroutine <a href="chapter_3.5.1.html#user_last_actions"><span style="font-family: monospace;">user_last_actions</span></a>:<br><br><span style="font-family: monospace;">
	303	IF ( ALLOCATED( u2_av ) )  THEN</span><br style="font-family: monospace;"><span style="font-family: monospace;">
[5]	304	WRITE ( 14 )
	305	'u2_av
[62]	306	';  WRITE ( 14 )  u2_av</span><br style="font-family: monospace;"><span style="font-family: monospace;">
[212]	307	ENDIF</span><br><br>Otherwise,
	308	the calculated
	309	time-average may be wrong. In the restart run, this quantity has to be
	310	read from the restart file by including the following code in
	311	subroutine <a href="chapter_3.5.1.html#user_read_restart_data"><span style="font-family: monospace;">user_read_restart_data</span></a>:<br><br><span style="font-family: monospace;">    IF ( initializing_actions == 'read_restart_data' )  THEN<br>       READ ( 13 )  field_char<br>       DO  WHILE ( TRIM( field_char ) /= '* end user *' )<br><br>          SELECT CASE ( TRIM( field_char ) )<br><br>             CASE ( 'u2_av' )<br>                IF ( .NOT. ALLOCATED( u2_av ) ) THEN<br>
	312	ALLOCATE( u2_av(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )<br>                ENDIF<br>                READ ( 13 )  tmp_3d<br>
	313	u2_av(:,nysc-1:nync+1,nxlc-1:nxrc+1) = &<br>
	314	tmp_3d(:,nysf-1:nynf+1,nxlf-1:nxrf+1)<br><br>             CASE DEFAULT<br>
	315	PRINT*, '+++ user_init: unknown variable named "', &<br>
	316	TRIM( field_char ), '" found in'<br>
	317	PRINT*,
	318	'
	319	data from prior run on PE ', myid<br>                CALL local_stop<br><br>          END SELECT<br><br>          READ ( 13 )  field_char<br><br>       ENDDO<br>    ENDIF<br></span></li></ol><h4><a name="dvrp"></a>4. Output of user-defined DVRP objects</h4>This
[144]	320	example shows the output of the
	321	quantity "square of the u-component", <span style="font-style: italic;">u<sup>2</sup></span>.
	322	If more than one user-defined
	323	quantity shall be output, the following steps have to be carried out in
	324	the
	325	same way for each of the quantities. First, steps 1 - 6
	326	of <a href="chapter_3.5.4.html#2D_and_3D"><span style="font-weight: bold;">part 3.</span> </a> <a href="chapter_3.5.4.html#2D_and_3D">(2d cross
	327	section or </a><a href="chapter_3.5.4.html#2D_and_3D">3d
	328	volume data)</a> are required. Second, the gridpoint
	329	data
	330	of the quantity has to
[130]	331	be resorted to array <span style="font-family: monospace;">local_pf</span>
[144]	332	in subroutine <a href="chapter_3.5.1.html#user_data_output_dvrp"><span style="font-family: monospace;">user_data_output_dvrp</span></a>
	333	as follows:<br><br><code>
	334	CASE ( '<span style="color: rgb(255, 0, 0);">u2</span>',
	335	'<span style="color: rgb(255, 0, 0);">u2</span>_xy',
	336	'<span style="color: rgb(255, 0, 0);">u2</span>_xz',
	337	'<span style="color: rgb(255, 0, 0);">u2</span>_yz'
	338	)<br>
	339	DO  i = nxl, nxr+1<br>
	340	DO  j = nys, nyn+1<br>
	341	DO  k = nzb, nz_do3d<br>
	342	local_pf(i,j,k) = <span style="color: rgb(255, 0, 0);">u2</span>(k,j,i)<br>
	343	ENDDO<br>
	344	ENDDO<br>
	345	ENDDO</code><br><br>Only those parts in <span style="color: rgb(255, 0, 0);">red</span> have to be
	346	adjusted by the user.<br><br>After performing these steps,
	347	the user-defined quantity <code>'u2'</code> can be
	348	selected like standard model quantities by the <a href="chapter_4.2.html#dvrp_graphics">dvrp_graphics</a>
	349	package parameter <a href="chapter_4.2.html#mode_dvrp">mode_dvrp</a>.<br><br><h4><a name="spectra"></a>5. Output of user-defined spectra</h4>This
	350	example shows the output of the
	351	quantity "turbulent resolved-scale horizontal momentum flux" (uv). If
	352	more than one user-defined
	353	quantity shall be output, the following steps have to be carried out in
	354	the
	355	same way for each of the quantities.<br><br><ol><li>The
	356	calculation of user-defined spectra is closely linked with the
	357	calculation of <a href="chapter_3.5.4.html#vertical_profiles"><span style="font-weight: bold;">part 1.</span>
	358	(user-defined
	359	</a><a href="chapter_3.5.4.html#vertical_profiles">vertical
	360	profiles</a><a href="chapter_3.5.4.html#vertical_profiles">)</a><span style="font-weight: bold;"></span> and <a href="chapter_3.5.4.html#2D_and_3D"><span style="font-weight: bold;">part 3.</span> (user-defined</a><a href="chapter_3.5.4.html#2D_and_3D"> </a><a href="chapter_3.5.4.html#2D_and_3D">3d volume data</a><a href="chapter_3.5.4.html#2D_and_3D">)</a><span style="font-weight: bold;"></span>. Therefore, the
	361	following prerequisites apply
	362	for each user-defined
	363	spectra quantity:</li></ol><ol style="list-style-type: upper-alpha;"><ol style="list-style-type: upper-alpha;"><li>From <a href="chapter_3.5.4.html#vertical_profiles"><span style="font-weight: bold;">part 1.</span>
	364	(user-defined
	365	</a><a href="chapter_3.5.4.html#vertical_profiles">vertical
	366	profiles</a><a href="chapter_3.5.4.html#vertical_profiles">)</a>
	367	steps 2 and 3. <br>See the sample code (as comment lines) for <span style="font-style: italic;">'uv'</span> and <code>ustvst</code>,
	368	respectively. (Actual output of vertical profiles - step 1 - is not
	369	required.)</li><li>From <a href="chapter_3.5.4.html#2D_and_3D"><span style="font-weight: bold;">part 3.</span> (user-defined</a><a href="chapter_3.5.4.html#2D_and_3D"> </a><a href="chapter_3.5.4.html#2D_and_3D">3d volume data</a><a href="chapter_3.5.4.html#2D_and_3D">)</a> steps 2, 3,
	370	4, 5, and 6. <br>See the sample code (as comment lines) for <span style="font-style: italic;">'uv'</span> and <code>ustvst</code>,
	371	respectively. (Actual output of 3d volume data - step 1 - is not
	372	required.)</li><li>The quantity has to be given a unique
	373	string identifier, e.g. <span style="font-style: italic;">'uv'</span>.
	374	This identifier must be different from the identifiers used for the
	375	PALM standard output (see list in description of package parameter <a href="chapter_4.2.html#data_output_sp">data_output_sp</a>).
	376	To switch on output of this quantity, the user has to assign the string
	377	identifier to the package parameter <a href="chapter_4.2.html#data_output_sp">data_output_sp</a>,
	378	eg.:<br><br><span style="font-family: monospace;">
	379	data_output_sp</span> =  <span style="font-style: italic;">'uv'</span><br><br></li></ol>A.
	380	and B. as prerequisites for C. require a naming convention of identical
	381	identifiers, e.g. data_output_pr_user = 'uv', data_output_user =
	382	'uv' and data_output_sp = 'uv'. This naming convention applies only
	383	in case of user-defined spectra.</ol><ol start="2"><li>Edit
	384	the subroutine <a href="chapter_3.5.1.html#user_spectra">user_spectra</a>
	385	(only those parts in <span style="color: rgb(255, 0, 0);">red</span>)
	386	as follows:<br><br><code>
	387	IF ( mode == 'preprocess' )  THEN<br><br>
	388	SELECT CASE ( TRIM( data_output_sp(m) ) )<br>
	389	<br>
	390	CASE ( 'u', 'v', 'w', 'pt', 'q' )<br>!--
	391	Not allowed here since these are the standard quantities used in <br>!--
	392	preprocess_spectra.<br>
	393	<br><span style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);">
	394	CASE ( 'uv' )</span><br style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);"><span style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);">
	395	pr = pr_palm+1</span><br style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);"><span style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);">
	396	d(nzb+1:nzt,nys:nyn,nxl:nxr) = ustvst(nzb+1:nzt,nys:nyn,nxl:nxr)</span><br style="color: rgb(255, 0, 0); background-color: rgb(255, 255, 255);">
	397	<br>
	398	CASE DEFAULT<br>
	399	PRINT*, '+++ user_spectra/preprocess: Spectra of ', &<br>
	400	TRIM( data_output_sp(m) ), ' can not be calculated'<br>
	401	<br>
	402	END SELECT<br><br>    ELSEIF (
	403	mode == 'data_output' )  THEN<br><br>
	404	SELECT CASE ( TRIM( data_output_sp(m) ) )<br><br>
	405	CASE ( 'u', 'v', 'w', 'pt', 'q' )<br>!--
	406	Not allowed here since these are the standard quantities used in <br>!--
	407	data_output_spectra.<br><br><span style="color: rgb(255, 0, 0);">
	408	CASE ( 'uv' )</span><br style="color: rgb(255, 0, 0);"><span style="color: rgb(255, 0, 0);">
	409	pr = 6</span><br style="color: rgb(255, 0, 0);"><br>
	410	CASE DEFAULT<br>
	411	PRINT*, '+++ user_spectra/data_output: Spectra of ', &<br>
	412	TRIM( data_output_sp(m) ), ' are not defined'<br><br>
	413	END SELECT<br><br>    ENDIF</code><br></li></ol>Note
	414	that spectra output is an <a href="chapter_3.7.html">optional
	415	software package</a> (see <a href="chapter_3.7.html">chapter
	416	3.7</a>). Therefore user-defined spectra also require the package
[148]	417	activation via <code>mrun -p spectra</code>.<hr>
[144]	418	<p style="line-height: 100%;"><br><font color="#000080"><font color="#000080"><a href="chapter_3.5.3.html"><font color="#000080"><img src="left.gif" name="Grafik1" align="bottom" border="2" height="32" width="32"></font></a><a href="index.html"><font color="#000080"><img src="up.gif" name="Grafik2" align="bottom" border="2" height="32" width="32"></font></a><a href="chapter_3.5.5.html"><font color="#000080"><img style="border: 2px solid ; width: 32px; height: 32px;" alt="" src="right.gif" name="Grafik3"></font></a></font></font></p><p style="line-height: 100%;"><i>Last
	419	change: </i> $Id: chapter_3.5.4.html 136 2007-11-26
	420	02:47:32Z letzel $</p>
[5]	421	</body></html>

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