METEOROGICAL AND CHEMICAL PREDICTION WEB BASED SYSTEM

USING RAMS AND CAMx NUMERICAL MODELS

By Maria Victoria Toro G. PhD

Nestor Waldyd Alvarez V. E.E.

Carlos Gabriel Sanchez T. E.E. Environmental Research Group

Atmospheric Studies Universidad Pontificia Bolivariana

INTRODUCTION

Medellin has Population 3 million people is located in Aburra Valley. It’s area is 1200 km2

Medellin has Population 3 million people is located in Aburra Valley. It’s area is 1200 km2

ColombiaColombia

System Purpose

• To be a Chemical and Meteorological forecast tool that can be used for both: the Community (simple data visualization) and the Government (planning) in a web site.

Outline of the System

Solaris

Data BaseOracle 9i

RAMS Model

CAMx Model

Application

services

Meteorological files

Dispersion Files

Apache Server Linux

php application

Graph

NCAR LibraryNCL languaje

Vis5D Application

php

User

GUIJavascript/Flash

php/HTML

METEOROLOGICAL PREDICTION

Regional Atmospheric Modeling System Characteristics

• Domain– Grid 1: 60 x 50 Grid Cells (64 km)– Grid 2: 30 x 30 Grid cells (16 km)– Grid 3: 30 x 30 Grid Cells (4 km)– Grid 4: 70 x 74 Grid Cells (1 km)

• Temporal Resolution :2 h

• Simulation time: 72 h

Input Data

TopographyUSGS Dem30

topo10m

Sea surface TemperatureFrom ATMET 1° of Resolution

Vertical profiles of T, RH,Wind, from Global Forecast System

NOAA READY

Land useUSGS 1 km resolution

RAMS MODELATMET

RESULTSWind Streams

Wind, temperature, Relative humidity Fields for the Aburrá Valley

* Medellín

Vertical Profile

Daily Forecast for the Aburrá Valley

Meteogram

Verification

• Intercomparation with Mesoescale Model (Germany)and with measured data

• Intercomparation with diagrams from NOAA

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25

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50

1 5 9 13 17 21 1 5 9 13 17

Hora Local

Tem

pera

tura

Pot

enci

al

(ºC

)

T(obs) RAMS MEMO

0

2

4

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7000

0

1E+0

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2E+0

5

2E+0

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2E+0

5

3000

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7000

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1E+0

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2E+0

5

2E+0

5

2E+0

5

3000

0

7000

0

Horas

Vel

ocid

ad (

m/s

)

RAMS Vel(obs)

Photochemical PredictionComprehensive Air Model with Extensions CAMx

(Environ)

Domain: 60 x 60 grid cellsResolution: 1 kmTemporal resolution 1 hSimulation time: 24 h

Input Data

Emissions Inventoryof 31 Chemical Species (1 km resolution)

Boundary Conditions

Meteorological Fieldsfrom RAMS Model

CAMx MODELENVIRON

Chemical MechanismCarbon Bond IV

Initial Conditions

• Daily forecast of Air Quality– Ozone field– CO field– VOC field

– NO2 field

RESULTS

VerificationIntercomparation with Real Data

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120

07:0

0:00

09:0

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11:0

0:00

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01:0

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03:0

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05:0

0:00

Horas

Con

cent

ratio

n O

3 (p

pb)

Ozono Calc. Ozono Obs.

oo

WEB PAGE

Next Projects

• Actualization of the RAMS and CAMx Models

• Improvement of the storms simulations

• Improvement of the input data

• Test differents Photochemical Mechanism

• Improvement of the Emission Model MODEAM

THANKS