Changes between Version 10 and Version 11 of UM/MesoscaleModelling


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Timestamp:
26/06/19 09:49:34 (4 months ago)
Author:
willie
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  • UM/MesoscaleModelling

    v10 v11  
    55= Mesoscale Modelling = 
    66 
    7 {{{#!box type=information 
    8 This page is currently under construction. 
    9 }}} 
    107 
    11 This section provides information specific to the mesoscale weather modelling community. Suggestions for items to include are welcome. 
     8 
     9This section provides information specific to the mesoscale weather modelling community. 
    1210 
    1311Mesoscale weather modelling support provides: 
     
    1816 * Analysis tools for diagnostics, such as NDdiag 
    1917 
    20 The analysis tools and data are provided by NCAS-CMS. Please acknowledge NCAS-CMS if you have used tools or data provided through our auspices. The software tools are designed to operate under the Unix or Linux operating systems. 
     18= Getting Initial Data = 
    2119 
    22 [wiki:GettingInitialData Getting Initial Data] 
     20Start dumps, LBC files and ensemble data can be obtained from the Met Office archive system (MASS).  This is accessed using the MOOSE client.  This covers the latest five years. Start dumps from earlier periods can be constructed as GRIB files from ECMWF data. 
     21 
     22To get the data, create a help desk ticket providing the following information, 
     23 
     24 * dates and times required, 
     25 * project name, 
     26 * estimate of the data volume in GB, 
     27 * where in MASS the data is located if it is not one of the standard sets below. 
    2328 
    2429 
    25 == External Links == 
     30== Getting data from the Met Office == 
     31The start dumps are now stored in MASS, which can be accessed via MONSooN or JASMIN using the MOOSE interface. 
     32 
     33Instructions for setting up external access to MASS from JASMIN are available on the [http://collab.metoffice.gov.uk/twiki/bin/view/Support/ExMASSUserSetUpGuide Collaboration Twiki]. 
     34 
     35To get data for 28/Sep/2011 we would type, 
     36 
     37{{{ 
     38moo get moose:/opfc/atm/global/rerun/201109.file/20110928_qwqg00.T+0 . 
     39}}} 
     40 
     41 
     42(Note the dot).  This takes about 15 to 20 minutes. 
     43 
     44To find out whether the data exists, 
     45 
     46{{{ 
     47moo ls moose:/opfc/atm/global/rerun/201109.file 
     48}}} 
     49 
     50Generally we prefer to get the output from the global runs - these have "qwqg" in the title; otherwise we get the global update - these have "qwqu" in the file name. 
     51 
     52For further information on using MOOSE on MONSooN and JASMIN see: [http://collab.metoffice.gov.uk/twiki/bin/view/Support/MooseOnMonsoon Getting started with MOOSE on MONSooN and JASMIN]. 
     53 
     54=== Older files === 
     55Older files are stored in a packed archive format - these have the extension ".pax".  These usually contain several dumps and have names like, 
     56 
     57 coprr.udQU06.20060721.pax 
     58 
     59  
     60where the "ud" denotes "unified model dump" and QU06 denotes global update output at 06Z.  These have to be unpacked and the files relabelled.  There is a script to do this in 
     61 
     62{{{ 
     63  
     64#!/bin/ksh 
     65# i will be like coprr.udQU06.20060725.pax 
     66for i in *.pax 
     67do 
     68print $i 
     69dat=${i%.*}                   # take .pax off the end 
     70datestring=${dat##*.}        # remove bit to left of the rightmost dot 
     71pax -r -f $i 
     72cd opdaily/datawgl 
     73for j in * 
     74do 
     75mv $j $TMPDIR/${datestring}_$j 
     76done 
     77cd - 
     78done 
     79}}} 
     80  
     81 
     82This assumes a list of pax files and  unpacks, relabels and stores the results in $TMPDIR. 
     83 
     84 
     85=== UKV start dumps === 
     86 
     87The UKV start dumps are in MASS with path names of the type: 
     88 
     89moose:/opfc/atm/ukv/rerun/201108.file/20110810_qwqv03.T+1 
     90 
     91moose:/opfc/atm/ukv/rerun/201108.file/20110810_qwqv06.T+1 etc...  
     92 
     93 
     94=== UKV forecasts and analyses === 
     95 
     96The UKV forecasts and analyses are in the MASS with path names of the type 
     97 
     98moose:/opfc/atm/ukv/prodm/YYYY.pp/prodm_op_ukv_YYYYMMDD_AA_NNN.pp for the multilevel fields and 
     99 
     100moose:/opfc/atm/ukv/prods/YYYY.pp/prods_op_ukv_YYYYMMDD_AA_NNN.pp 
     101 
     102where YYYY = year e.g. 2011, MM = month e.g. 05, DD = day e.g. 21 AA = analysis time = 03, 09, 15 or 21 NNN = the part of the forecast - goes up in two's from 000 to 036. e.g. 000, 002, 004 .... 036 
     103 
     104 
     105=== MOGREPS-R files === 
     106 
     107Ensemble fields are in: 
     108 
     109moose:/opfc/atm/mogreps-g/rerun/YYYYMM.file moose:/opfc/atm/mogreps-r/rerun/YYYYMM.file 
     110 
     111Where YYYY = year e.g. 2011, MM = month e.g. 07 
     112 
     113At minimum, to re-run MOGREPS-R you need the analysis files in the mogreps-r path: E.g. 20110722_qwqy06.T+0.18km 20110722_qwqy18.T+0.18km 
     114 
     115And all the perturbations files E.g. 20110722_perts.qwey06.oper??.pp1 where ?? Goes from 00 to 23 members. 
     116 
     117Also in the mogreps-g path you need the boundary files: E.g. 20110722_qweg00.oper??.FRAMES.EY.tar.gz. 
     118 
     119  
     120 
     121== Getting data from ECMWF == 
     122The standard data I provide is from ECMWF's operational data. It is a deterministic forecast from the atmospheric model, version 1, analysis. It is not ERA. 
     123Data prior to X is in GRIB1 format, after that it is GRIB2.  The GRIB start dumps are created by concatenating the following fields: 
     124 
     125 * skin temperature, 
     126 * surface pressure, 
     127 * land-sea mask, 
     128 * geo-potential, 
     129 * temperature, 
     130 * specific humidity, 
     131 * U and V wind velocities 
     132 
     133In contrast a UM dump contains typically a hundred fields.  So the GRIB start dumps need to be reconfigured 
     134 
     135 
     136= External Links = 
    26137 
    27138[https://www.ncas.ac.uk/index.php/en/atmospheric-physics-home NCAS Climate and High Impact Weather] 
     
    30141 
    31142[http://www.met.rdg.ac.uk/~mwp/home/ Mesoscale Group, University of Reading] 
     143 
     144 
     145[wiki:WMcGinty W. McGinty] 
     146 
     14726 June 2019