Weather Research and Forecasting (WRF) Portal

Seychelles Martinez

School of Computing and

Information Sciences

Florida International University

Elias Rodriguez

School of Computer Engineering

Computer Science and

Electrical Engineering

Polytechnic University of Puerto Rico

REU Summer Program7/14/2008 1

Outline

• Introduction

• Motivation

• Description of the project

• Accomplishment

• Goals

• Questions

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Introduction

• What is WRF?

• What is Ensemble Forecasting?

• How does the system work?

• What is the scope of what we are

doing?

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Introduction

• What is WRF?Weather Research and Forecasting

Developed by National Center for Atmospheric Research (NCAR)

Widely accepted in meteorology

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Introduction

• What is Ensemble Forecasting? Purpose: account for errors in

forecasting system due to chaotic nature of atmospheric dynamics

Different models created in parallel with different initial conditions.

Models, then, combined to produce a probabilistic forecast

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Introduction

• How does the system work?

• Main objective of the overall

project:

Grid: enables rapid computation of parallel tasks.

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BSCBSC FIUFIU

Job-Flow Manager

Job-Flow Manager

Peer-to-peerProtocols

Web-Based Portal

Web-Based Portal

Meteorologist Meteorologist

Local Resources

Local Resources

Local Resources

Local Resources

Meta-Scheduler

Meta-Scheduler

Local scheduler

Local scheduler

Local scheduler

Local scheduler

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Resource Policies

Resource Policies

Architectural Overview of the Overall Project

Introduction

• What is the scope of what we are

doing?

The WRF Web Portal- Front End- Ease of use for meteorologists

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Motivation• Help meteorologist focus

on their science

• Speed up Ensemble

Forecasting

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System Architecture

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•Portal: Used by meteorologist. Front End of system

•JFM: Receives workflow and decides what can be run in parallel

•Meta-Scheduler: Assigns jobs to different resources

Web-Portal SubArchitecture

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Workflow Architecture

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What we know about files

• Input Files:−wrfbdy−wrfinput−namelist

• Output File:−netcdf file

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What we know about files

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met_em filewrfbdy file wrfinput file

Real.exe

What we know about files

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Meteorologist Profile

• Create new Ensemble Forecasts

• Create new Single Run

• Show the list of Ensemble

Configurations

• The status of the runs

• Visualize the results

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Ensemble Run

• To run an ensemble, the portal send

a workflow to the JFM.−Specify where the real.exe is−Specify what the perturbation function

is−Generate the ensemble members−Specify the aggregation function

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Research-Run

- A single run using old storm data as

initial data

- Change certain WRF modeling

variables- Examples

- physics-package- cloud cover- snow cover- turbulence & mixing

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Research-Run cont.

- Run output then compared against

actual storm attributes- Compare results:

- Projected track vs. actual track- Projected intensity vs. actual intensity- Etc.

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Research-Run Objectives

- Objectives- Upload files from WPS- Edit namelist for their research goals- Run their submission- Get the results of the simulation

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Research-Run Objectives

- Future Objective- Certain types of studies only view and

modify variables that apply to the specific study

- Open a previous study and resubmit with different variables/options selected

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Portal Input – Design Decision

- Pre-Processing- Who does it and how much do they do?

- Tasks- WPS

- Used to create the mother domain and gets the weather data from an archive or uses the current weather conditions.

- Real.exe- Used on WPS output to create files needed to

run WRF simulations. A fair amount of processing power needed.

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Portal Input – Design Decision

Options

1. User does all pre-processing - User runs WPS and Real.exe locally

2. User does half and Portal does half - User runs WPS local and real.exe on portal

3. Portal does all pre-processing - Portal has WPS functionality built in and

real.exe runs on portal

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Pros

1. Light design burden,

no real.exe

processing time

2. User only needs WPS

but does not need

WRF

3. User only needs web

access

Cons

1. User needs WRF installed

and CS knowledge

2. Real.exe processing time,

and User still needs WPS

3. Portal design really

complex, and real.exe

running time is done on

Portal resources

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Portal Input – Design Decision

Portal Input – Design Decision

Decision

• Option 2: User runs WPS, and the

portal runs real.exe− This will relieve the burden of having

a WRF installation from the user− A good separation of functionality

• Option 3 is a future goal

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Database Diagram

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Project Plan

• Develop the API

• Simulate an ensemble dummy run

from the Portal

• Write the final paper.

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References

• Transparent Grid Enablement of

Weather Research and Forecasting S. Masoud Sadjadi, Liana Fong, Rosa M. Badia, Javier Figueroa, Javier

Delgado, Xabriel J. Collazo-Mojica, Khalid Saleem, Raju Rangaswami, Shu Shimizu, Hector A. Duran Limon, Pat Welsh, Sandeep Pattnaik,`Anthony Praino, David Villegas, Selim Kalayci, Gargi Dasgupta, Onyeka Ezenwoye, Juan Carlos Martinez, Ivan Rodero, Shuyi Chen, Javier Muñoz, Diego Lopez, Julita Corbalan, Hugh Willoughby, Michael McFail,Christine Lisetti, and Malek Adjouadi1

• Towards a Self-Configurable Weather

Research and Forecasting System By Khalid Saleem, S. Masoud Sadjadi, Shu-Ching Chen

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Questions ?

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