Wido Hanggoro

Pusat Penelitian dan PengembanganBadan Meteorologi Klimatologi dan Geofisika

OverviewWRF ?WRF vs WRF EMS (Environmental Modeling

System)Instalasi WRF EMS WRF BenchmarkDomain WizardRunning WRFSummary

WRF (Weather Research and Forecasting)WRF (http://wrf-model.org/) merupakan sebuah

model mesoscale NWP generasi terbaru yang didesain sebagai model Forecasting, simulasi dan Operasional.

Mempunyai multiple dinamik core, 3DVAR asimilasi dan dapat berjalan pada serial dan pararel platform

Mempunyai banyak software turunan seperti: WRF-DA (Data Assimilation) , WRF-CHEM (Chemistry) dan berbagai utility (e.g. MET-Model Evaluation Tools)

Sangat banyak digunakan oleh pengguna NWP

WRF (Weather Research and Forecasting)Karena sifatnya sebagai mesoscale model,

untuk downscale WRF mempunyai sistem nesting 1:3

Parent Domain 1

Child Domain 1/3

Grand Child Domain 1/9

WRF (Weather Research and Forecasting)Membutuhkan data Intial Condition dan

Boundary Condition (CCAM hanya membutuhkan data Initial Condition)

Mempunyai GUI (Graphical User Interface) untuk menyiapkan data topography

Dapat menggunakan data SST dan landmask “input”an

Data initial dan boundary yang flexible (dapat di download sesuai domain interest

WRF (Weather Research and Forecasting)

WRF (Weather Research and Forecasting)

WRF (Weather Research and Forecasting)

WRF versus WRF EMS WRF WRF EMS

1 Instalasi yang cukup rumit Instalasi cukup mudah

2 Hanya tersedia 1 core pada tiap instalasi Langsung terinstal 2 core (ARW dan NMM)

3 Routine belum tersedia Routine sudah tersedia

4 Perlu instalasi software-software lain Software utiliti langsung tersedia

5 Belum terdapat GUI Terdapat GUI

6 Integrasi dengan WRF CHEM dan WRF DA Belum terintegrasi

Instalasi WRF EMSDownload software dari

http://strc.comet.ucar.edu/wrfemsInstall csh atau tcsh ( c shell scripting lang.)Letakkan hasil download di

/home/user/tmp/(WRF release version eg 3.1.5.1.1)

Jalankan ems_install.pl --release --locdir <path to tmp directory>

Just follow da’ instruction

Instalasi WRF EMSApabila instalasi berhasil, pada top folder akan

terdapat folder-folder berikut:bin The bin directory contains the 32- and 64-bit Linux

binaries provided with the WRF EMS. These binaries have been specially compiled for use with the system. If you would like to use your own binaries please contact the SOO STRC first; otherwise, you will fail

data The data directory is the location for the large terrestrial data sets, default model configuration files, default namelist files, and tables used when running the system. There are quite a few files and directories beneath data; however, you probably won’t need to concern yourself too much unless you are trying to make permanent changes to the system.

Instalasi WRF EMSBerikut merupakan folder yang terdapat dibawah folder

data:geog Contains the various terrestrial data sets used with the WRF domains Contains sample NMM and ARW domains narr Contains land mask fields for running simulations with NARR data tables Contains the default EMS configuration files and tables

docs The docs directory contains assorted pieces of documentation on the WRF and WRF EMS. Not all of the information is relevant to the EMS but users may find some value in the resources.

Instalasi WRF EMSdwiz The dwiz directory contains the Java libraries and

binaries used when running the WRF Domain Wizard (DW). logs The logs directory contains the installation and Domain

Wizard (dwiz) log files. It is also the default location for the ems_autorun.log files. The log files from the individual domain simulations are not located in “wrfems/logs” but can be found in “wrfems/runs/<domain>/log”.

runs The runs directory is where all your magic happens. This is where your newly-created domain directories will reside after you have completed a successful localization with the Domain Wizard. It is also where you will run your simulations with the EMS

Instalasi WRF EMSstrc The strc directory and subdirectories contain all of

the Perl routines and modules used to power the WRF EMS. It is unlikely that you will ever need to edit the files in this directory. These files are also the most likely to be updated with each new EMS release.

util The util directory contains many of the utility programs and packages provided with the EMS that help to make it a “system”. The preconfigured domains used for running the benchmark cases reside here as well as the NAWIPS and GrADS visualization packages. There are also additional files and directories that may be of interest to you so it is worth spending some time investigating all that “wrfems/util” has to offer.

Instalasi WRF EMSDirektori yang berada dibawah folder util antara lain :

bin Various precompiled non-EMS developed utilities (Section 3.6.1) benchmark The NMM and ARW core benchmark domains grads GrADS binaries, scripts, and data files mpich2 MPICH2 routines, Python scripts and documentation nawips NAWIPS model data manipulation and display package ncview NcView binaries, scripts, and data files workshop Contains the data, html files, and documentation for the EMS exercises wrfems The EMS-modified WPS and WRF release files wrfutils Various precompiled NCAR-provided WRF utilities

Instalasi WRF EMS $EMS The top levels of the WRF EMS installation (wrfems) $EMS_BIN The primary directory where the EMS binaries reside

(wrfems/bin) $EMS_DATA The directory where the static data sets reside

(wrfems/data) $EMS_STRC The location of the EMS STRC Perl modules and

routines (wrfems/strc) $EMS_RUN The directory where all your computational domains are

located (wrfems/runs) $EMS_UTIL The utility (closet) directory (wrfems/util) $EMS_CONF The location of the default configuration and grib

information files (wrfems/conf) $EMS_LOGS Location of the general EMS log files (wrfems/logs) $EMS_DOCS Location of the EMS and other WRF documentation

(wrfems/docs)

WRF Benchmark

WRF BenchmarkBerguna sebagai benchmarking software WRF

EMSMasuk ke folder $EMS_UTIL/benchmark/(pilih

antara ARW atau NMM core)Jalankan perintah berikut

% ems_prep --benchmark % ems_run % ems_post –grads

Hasil dapat dilihat dalam folder $EMS_UTIL/benchmark/(ARW atau NMM)/emsprd/grads

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Domain Wizard

Running WRFems_prep Used to identify, acquire, and process the

external data sets for use as initial and boundary condition information in the WRF EMS.

ems_run Ingests the output from ems_prep, created the initial and lateral boundary conditions for the model run, and then executes the simulation.

ems_post Processes all the model output and exports the data files to exotic locations of your dreams.

ems_autorun Automates the process of executing ems_prep, ems_run, and ems_post in succession for the purpose of creating a real-time simulation experience.

Running WRFSecara sederhana kita dapat melakukan prediksi

dengan menggunakan WRF EMS dengan cara sbb:Masuk ke folder $EMS_RUN/(nama domain)% ems_prep --dset gfs --length 24

--dset gfs = data initial dan boundary condition menggunakan data GFS--length 24 = panjang prediksi selama 24 jam

% ems_run % ems_post --grads

--grads = hasil output mempunyai format *.ctl (grads format file)

SummaryPada saat ini software WRF EMS baru sampai

tahap instalasi pada serial platformMasih banyak hal-hal yang perlu dikaji lebih lanjut

seperti: eksplorasi lanjutan tentang software WRF EMS, tuning parameter yang sesuai dengan kondisi tropis dan integrasi format data.

Perlu adanya verifikasi dan validasi model tersebut, dan perlu dipikirkan pula ensemble model WRF dengan software NWP yang sudah establish

Mempelajari berbagai software utiliti WRF (WRF-DA dan WRF-CHEM, MET) dan turunannya (e.g. Calpuff)

I have no special talent. I am only passionately curious (Albert Einstein)

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