Biomass burning session

Guergana Guerova

The 3rd GEOS–Chem Users' MeetingApril 11–13, 2007 @ Harvard University

Simulations of the 2002-2003bush fire season in Australia

Bush fire season November 2002 - January 2003

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Motivation:

worst drought in a century in Australia

2003 a record year for wildfires

January 260 000 hectares burnt

20 500 people displaced

millions $ in public and private properties

Distinctive properties of Australian aerosols:

spinifex smoke: high in black carbon

dust: high in hematite

australian dust and smoke more absorbing

increased atmospheric heating

Dust storm Griffith NSW Australia: 12 November 2002

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Photo: Denis CouchFront brings dust from the west

GEOS-Chem CO column 2001/2002 2002/2003 2003/2004

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November

December

January

GEOS-Chem AOD 550 nm 2001/2002 2002/2003 2003/2004

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November

December

January

.

FTIR correlation AOD/CO, AOD/NH3

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AOD / CO

AOD / NH3

C. Murphy, University of WollongongAOD

NH3Regression equation:

CO=[(1.6±0.1)AOD + (2.1±0.1)] x1018

AOD

CO

AOD/CO R

11 2001 0.99

11 2002 0.96

01 2003 0.98

AOD/NH3 R

01 2003 0.96

GEOS-Chem correlation AOD/CO, AOD/NH3

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AOD / CO

AOD / NH3

AOD

NH3

AOD

CO

AOD/CO R

11 2001 0.84

11 2002 0.75

01 2003 0.96

AOD/NH3 R

01 2003 0.2

MODIS AOD: 26 January 2003

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C. Murphy, University of Wollongong

GEOS-Chem 26 January 2003

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GEOS-Chem AOD GEOS-Chem CO

Conclusions

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AOD/ CO and AOD/ NH3 correlate in bush fires in January 2003

FTIR correlation ~ 0.95 for both AOD/CO and AOD/NH3

GEOS-Chem AOD/CO correlation ~0.95 in January 2003 only

MODIS AOD can be translated into trace gas column

vertical concentration known infer surface concentration

Working plan 2007-2008

inverse modeling using MODIS AOD

use MODIS AOD to convert to trace gas columns

long range transport over the Tasman Sea

real-time GEOS-Chem during the sugarcane campaign 11/2007

International ARCNESS Winter School

“Atmospheric composition observation and modeling”

University of Wollongong

Wollongong, Australia

13 - 17 August 2007

We have pleasure in inviting you to the International ARCNESS Winter School: Atmospheric composition observation and modeling, to be held at the University of Wollongong, Wollongong Australia, in the week of 13 – 17 August 2007.

Scope of the winter schoolThe topics covered include: * Overview of atmospheric composition modeling * Observations from ground and space * Applications: bush fires, heat waves, dust stormThe Winter School invites young researcher with interests in the field of tropospheric composition. The courses cover a broad spectrum of observation methods and state of art modeling of tropospheric chemistry and transport on global and regional scales. Each topic includes keynote plenary lectures with discussion. All Winter School participants are asked to present a poster of their research. There will be ample opportunity for discussion. An excursion may be organized depending on interest. A detailed program is available from: http://www.uow.edu.au/conferences/ARCNESS 2007/home.html

CostsThe fee is AU$ 300 (full registration) and AU$ 200 (student registration) and includes conference registration, lunch, dinner and poster session nibbles. A small number of scholarships will be available.