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Environmental Sensors and
Environmental Monitoring in the Green Economy
Dean Venables
THE GREEN ECONOMY?“[An economy] that results in improved human well-being and social equity, while significantly reducing environmental risks and ecological scarcities”
(UNEP working definition of a Green Economy)
Environmental monitoring helps to identify and quantify adverse effects on human well-being and on the environment
AIR QUALITY
CLIMATE CHANGE
AIR QUALITY
London’s killer Smog of December 1952
What’s the verdict on Harney?DR DONAL O’SHEA: Consultant endocrinologist and campaigner on obesity
“Achievements : In the context of positive impact on health, it was something she did in another department. The smokeless fuel legislation she introduced while in the Department of the Environment had a huge impact, and within one year winter hospital admissions for chest infections were significantly down.”
Irish Times, February 2011
John Tyndall
CLIMATE CHANGE
ATMOSPHERIC INSTRUMENT DEVELOPMENT
IBBCEAS – A powerful and flexible gas sensor
0
1000000
2000000
3000000
4000000
5000000
600 620 640 660 680 700 720
Wavelength [nm]
Inte
nsi
ty
[co
un
ts]
high-reflectivitydielectric mirrors
sample cell
light source(Xe arc lamp) filters
spectrograph
Advantages:Long optical path through the sample → sensitivityWide spectral region → selectivity, multiple target compounds
Uses:Atmospheric monitoring and research:
NO2, O3, NO3, halogen oxides, SO2, mercuryPossibilities in medicine (breathanalysis), analytical sensors
ATMOSPHERIC INSTRUMENT DEVELOPMENT
Chamber experiments and instrument intercomparisonNO3
NO2
Aerosol extinction
HONO
20 m
Transmitter
Receiver
SAPHIR chamber
ATMOSPHERIC INSTRUMENT DEVELOPMENT
Field instrument developmentDetection of halogen species:
BrO, I2, IO, OIOHalogen chamber
ATMOSPHERIC INSTRUMENT DEVELOPMENT
Extending the method into the deep-UVApplications in in Hg detection and O3 monitoring Continuous Emissions Monitoring
ATMOSPHERIC INSTRUMENT DEVELOPMENT
Mexico City smog
Atmospheric monitoring is crucial to promoting and
protecting people and the environment:
Give advanced warning on the state of the
environment and environmental changes
Link pollutants with public health & ecosystem health
New devices are necessary
Commercial potential of new devices
CONCLUSIONS
PEOPLE
My group & other members of the laboratory
the Laser Spectroscopy Group
Colleagues at the
FUNDING
Environmental Protection Agency
EU FP7 (EUROCHAMP2)
Science Foundation Ireland
ACKNOWLEDGEMENTS