Aerosol Network - Complex Networks - Lecture Slides, Slides of Computer Networks

Download Aerosol Network - Complex Networks - Lecture Slides and more Slides Computer Networks in PDF only on Docsity!

Aerosol network

Overview

• Introduction
• Why is it important to study?
  • Harms from air pollution
  • Aerosol transport
  • Why ozone? And why California
• Ozone transport and Previous Work
• Conclusion
• Questions

Introduction

Beijing, OCT .08 2010

What do aerosol looks like?

Pictures of Aerosol Particles from Biomass Burning

Introduction

Chakrabarty, R. K., H. Moosmüller, M. A. Garro, W. P. Arnott, J. W. Walker, R. A. Susott, R. E. Babbitt, C.E. Wold, E. N. Lincoln, and W. M. Hao (2006). “Emissions from the Laboratory Combustion of Wildland Fuels: Particle Morphology and Size.” J. Geophys. Res. 111 , doi:10.1029/2005jd006659 (in press). Docsity.com

Satellite Image of Wildfire Smoke

7

Smoke from Southern

California wildfires (26-

Oct.-2003)

Introduction: Source of aerosol

Burning Brazilian Forest near Ji Parana: Pyrocumulus

Courtesy Michael Welling, SMOCC (Sept 25, 2002)

Introduction: Source of aerosol

Source of aerosol

• Source of PM10 and PM2.5:

PM10: Dust, Windblown Dust (Agriculture) and Construction (Fireplaces) Also formed from other pollutants (acid rain, NOx, SOx, organics). Incomplete combustion of any fuel. PM2.5: Fuel Combustion in Motor Vehicles, Equipment and Industrial Sources, Residential and Agricultural Burning. Also formed from reaction of other pollutants (acid rain, NOx, SOx, organics).

Introduction

Source of aerosol

In our daily life

Introduction

Why is it important to study

• Climate changing (global warming, ice melting, etc)
• Health effect (e.g. inhaled atmospheric particles were found in the lungs, liver, spleen, kidneys, heart, brain etc.)
• Economy (Every year, Californians lose billions of dollars due to air pollution. The cost of health-related problems, plus damage to crops, forests, and wild vegetation, all add up to a big drain on California's economy. Air pollution is something we can't afford.

**1.

1.**

Mortality-Rate Ratio (^15) Fine Particles, μg/m 20 253 30

P^ T

W

L H

S

Estimated Adjusted Mortality-Rate Ratios and Pollution Levels in the Six Cities (USA).

Introduction

Aerosol transportation

Schematic diagram

http://en.wikipedia.org/wiki/File:Map_prevailing_winds_on_earth.png

Westerlies and Trade winds

2

3

Global Aerosol Transport

R. Husar et al.(1998)

April 1998 event

http://en.wikipedia.org/wiki/File:Chinadustmovie.gif (^) http://en.wikipedia.org/wiki/File:Dust_movie.gif

Transport of East Asian Dust

across the pacific

Why ozone?

• Ozone is a colorless gas at normal atmospheric concentrations that is a natural part of the environment. In the upper atmosphere, ozone protects the earth from exposure to harmful ultraviolet rays. However, ozone can be formed in the lower atmosphere by natural processes or by man-made pollutants. Docsity.com

Where Does Ozone Come From?

Ozone is created by a chemical reaction:

• = O (^3)

VOC + NOx + Heat + Sunlight = Ozone

VOC (Volatile Organic Compounds) and Nox (Nitrogen Oxides) come from

motor vehicles, power plants, industrial facilities, and other sources.