-
Notifications
You must be signed in to change notification settings - Fork 3
/
updates-3.7.html
188 lines (121 loc) · 10.6 KB
/
updates-3.7.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
<html>
<head>
<title>WRFDA Updates for 3.7</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="KEYWORDS" content="meteorology, mesoscale, microscale, weather modeling, forecasting weather, weather prediction, predictability, cloud systems, boundary layers, surface-atmosphere interactions, convective cloud systems, atmospheric chemistry, precipitating weather systems, wildfire research, National Center for Atmospheric Research">
<meta name="DESCRIPTION" content="WRF Data Assimilation Users homepage">
<meta name="ROBOTS" content="INDEX,FOLLOW">
<meta name="resource-type" content="document">
<meta http-equiv="expires" content="0">
<meta name="author" content="MMM Webmaster">
<meta name="copyright" content="Copyright (c) 2017 by UCAR">
<meta name="revisit-after" content="1 days">
<meta name="distribution" content="Global">
<meta name="rating" content="General">
<SCRIPT language=JavaScript src="./scripts/menu_array.js" type=text/javascript></SCRIPT>
<SCRIPT language=JavaScript src="./scripts/mmenu.js" type=text/javascript></SCRIPT>
<link href="./images/wrfstyle.css" rel="stylesheet" type="text/css">
</head>
<body bgcolor="#FFFFFF" background="./images/back2.jpg" link="#000099" vlink="#000099" alink="#FF3300" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr bgcolor="#000000">
<td height="10" bgcolor="#000000"><div align="left"><img src="images/transgif.gif" width="1" height="1"></div>
</td>
</tr>
<tr valign="top">
<td height="10" bgcolor="#DDFFDD"><img src="images/header_new_cropped.png" height="56" border="0"></td>
</tr>
<tr bgcolor="#FFCC33">
<td height="6" background="./images/goldrule.jpg"><img src="images/goldrule.jpg" width="1" height="1"></td>
</tr>
<tr>
<td height="34" bgcolor="#009933"> </td>
</tr>
<tr>
<td height="2" bgcolor="#ffcc66"><img src="images/transgif.gif" width="1" height="1"></td>
</tr>
</table>
<table width="100%" height="89%" border="0" cellpadding="0" cellspacing="0" class="background">
<tr>
<td width="100%" height="838" valign="top" bgcolor="#CBFFCD"><table width="780" border="0" cellpadding="0" cellspacing="0">
<tr valign="top">
<td height="842" bgcolor="#009933"><p align="right"> </p>
<p align="center"><a href="system.html" class="leftnavlink">System Overview</a></p>
<p align="center"><a href="updates-3.9.html" class="leftnavlink">WRFDA V3.9</a></p>
<p align="center"><a href="updates-3.8.1.html" class="leftnavlink">WRFDA V3.8.1</a></p>
<p align="center"><a href="updates-3.8.html" class="leftnavlink">WRFDA V3.8</a></p>
<p align="center"><a href="updates-3.7.1.html" class="leftnavlink">WRFDA V3.7.1</a></p>
<p align="center" style="border-width: 5px;border-style: solid;border-color: #CBFFCD;background-color: #CBFFCD;font-family: Arial; line-height: 10pt;font-weight: bold;">WRFDA V3.7</p>
<p align="center"><a href="updates-3.6.1.html" class="leftnavlink">WRFDA V3.6.1</a></p>
<p align="center"><a href="updates-3.6.html" class="leftnavlink">WRFDA V3.6</a></p>
<p align="center"><a href="updates-3.5.1.html" class="leftnavlink">WRFDA V3.5.1</a></p>
<p align="center"><a href="updates-3.5.0.1.html" class="leftnavlink">WRFDA V3.5.0.1</a></p>
<p align="center"><a href="updates-3.5.html" class="leftnavlink">WRFDA V3.5</a></p>
<p align="center"><a href="updates-3.4.1.html" class="leftnavlink">WRFDA V3.4.1</a></p>
<p align="center"><a href="updates-3.4.html" class="leftnavlink">WRFDA V3.4</a></p>
<p align="center"><a href="updates-older.html" class="leftnavlink">Older versions</a></p>
<p align="center"><a href="tutorial.html" class="leftnavlink">Tutorials</a></p>
<p align="center"><a href="download/tools.html" class="leftnavlink">Tools</a></p>
<p align="center"><a href="known-problems.html" class="leftnavlink">Known Problems and Fixes</a></p></td>
<td width="663" bgcolor="#CBFFCD"><p> </p>
<p class="pagetitle">WRFDA Version 3.7 update summary</p>
<blockquote>
<h2>WRFDA Version 3.7 was released on April 20, 2015. </h2>
<h3><big>New features:</big></h3>
<ul class="bodytext"><li>New background error option: <a href="#cv7">CV7</a></li>
<li><a href="#radar">Radar assimilation</a>: new options have been added for reflectivity assimilation.</li>
<li>A new <a href=#wrfplus_physics>mp_physics option is available for WRFPLUS in 4DVAR runs</a>.</li></ul>
<h3><big>Updated features:</big></h3>
<ul class="bodytext"><li>WRFDA can now use WRF files with the "lat-lon" (cylindrical equidistant) map projection. This does not include global WRF files.</li>
<li>Updated libraries:</li>
<ul class="bodytext"><li>RTTOV interface now supports RTTOV Version 11.1 or 11.2</li></ul>
<li>Bug fixes and performance improvements</li>
<li><a href="download/wrfplus.html">WRFPLUS</a> (WRF adjoint and tangent linear model) has been upgraded to V3.7 and is consistent with the released WRF version 3.7.</li></ul>
<p class="bodytext">For instructions on compiling and running the latest version of WRFDA, please refer to the updated <a href="Docs/user_guide_V3.7/WRFDA_Users_Guide.html">User's Guide</a></p>
</blockquote>
<p class="pagetitle">Version 3.7 update details</p>
<blockquote>
<a name="cv7"></a>
<h1>CV7 background error option</h1>
<p style="padding-right: 45px;padding-left: 45px;"><table width="100%" border="1" class="bodytable" style="background-color:gold;"><tr><td style="padding-right: 45px;padding-left: 45px;"><b>Note:</b> There is a known bug for this option in 3.7 and 3.7.1 that leads to incorrect results: <a href="known-problems.html#V3_7_1">see this page</a> for a solution.</td></tr></table></p>
<p class="bodytext">WRFDA now has an additional background error option. This new option, CV7, uses a different set of control variables as the other standard options: u, v, temperature, pseudo relative humidity (<em>RH_s</em>), and surface pressure (<em>P_s</em>). The pseudo relative humidity is defined as <em>Q/Q_b,s</em>, where <em>Qb,s</em> is the saturated specific humidity from the background field. The procedure for generating <code>be.dat</code> background error files with GEN_BE is the same as for CV5, with an additional variable which must be set in the GEN_BE wrapper script: <code>export NL_CV_OPTIONS=7</code>. See <a href="Docs/user_guide_V3.7/users_guide_chap6.htm#_Running_gen_be">the relevant section of the User's Guide</a>) for more detailed instructions.</p>
<a name="radar"></a>
<h1>Radar assimilation updates</h1>
<p style="padding-right: 45px;padding-left: 45px;"><table width="100%" border="1" class="bodytable" style="background-color:white;"><tr><td style="padding-right: 45px;padding-left: 45px;"><b>Note:</b> There is a known bug in the original release version when <code>use_radar_rqv = .true.</code>: <a href="known-problems.html#V3_7_results">see this page</a> or download the bugfix version 3.7.1 for a solution.</td></tr></table></p>
<p class="bodytext">As of version 3.7, WRFDA has an improved radar data assimilation capability: there are now two different options for assimilating radar reflectivity data.</p>
<p class="bodytext">The new reflectivity assimilation option (<code>use_radar_rhv</code>) is a scheme described in <a href="http://journals.ametsoc.org/doi/full/10.1175/JAMC-D-12-0120.1">Wang et al, 2013</a>. This option which assimilates rainwater mixing ratio that is estimated from radar reflectivity, described as an “indirect method” in the paper. This second option also includes an additional namelist option option (<code>use_radar_rqv</code>) that allows the assimilation of in-cloud humidity estimated from reflectivity using a method which is also described in Wang et al, 2013. <code>use_radar_rqv</code> also includes the assimilation of snow and graupel converted from reflectivity using formulas as described in <a href="http://journals.ametsoc.org/doi/abs/10.1175/JAS-D-11-0162.1">Gao and Stensrud, 2012</a>.</p>
<p class="bodytext">Additionally: previous versions did not allow for PREPBUFR-format conventional observations to be assimilated with radar data in ASCII format (ob.radar). Radar data can now be assimilated with most other data types, including conventional and satellite obs.</p>
<p class="bodytext">More detailed information about radar assimilation can be found in <a href="Docs/user_guide_V3.7/users_guide_chap6.htm#_Radar_Data_Assimilation">a new section of the User's Guide</a>.
<a name="wrfplus_physics"></a>
<h1>New WRFPLUS microphysics option</h1>
<p class="bodytext">WRFPLUS now has two microphysics options to choose from for 4DVAR assimilation. The new scheme is a modified Kessler scheme. You can control which scheme is used with the following namelist option:</p>
<p class="bodytext">&physics<br>
mp_physics_ad: mp_physics option for WRFPLUS.<br>
98: Use original large-scale condensation microphysics (default)<br>
99: Use new modified Kessler scheme</p>
<p> </p>
</blockquote>
<p class="pagetitle">Helpful links</p>
<blockquote>
<li class="bodytext"><big><a href="./Docs/user_guide_V3.7/users_guide_chap6.htm#_Installing_WRF-Var">Compiling WRFDA</a></big></li>
<li class="bodytext"><big><a href="./Docs/user_guide_V3.7/users_guide_chap6.htm#_Running_WRF-Var_1">Running WRFDA</a></big></li>
<li class="bodytext"><big><a href="./Docs/user_guide_V3.7/users_guide_chap6.htm#_Description_of_Namelist_1">List and description of namelist variables</a></big></li>
<p class="bodytext"><br></p>
<p align="center" class="detailtextRed"><br>
<script language="JavaScript"><!-- ;;;;;;;;;;;-->
<!--
document.write("updated " + document.lastModified);
// -->
</script><br><br>
</p>
<p> </p>
</blockquote> </td>
</tr>
</table></td>
</tr>
<tr>
<td height="50" bgcolor="#009933" class="detailtext"> </td>
</tr>
</table>
</body>
</html>