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Analysis of Black Carbon Data for Ireland - Michael Geever, NUIG

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Presentation from EPA Transboundary Research Workshop, Galway, 8th and 9th September 2010.

Published in: Technology
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Analysis of Black Carbon Data for Ireland - Michael Geever, NUIG

  1. 1. Analysis of Black Carbon Data for Ireland<br />Michael Geever, NUI, Galway<br />
  2. 2. What is Black Carbon?<br />Light-absorbing carbonaceous particle produced by incomplete combustion of various fuels<br />Light-absorbing subset of particulate matter<br />Soot<br />Elemental Carbon<br />Refractive Carbon<br />Black Carbon<br />Brown Carbon<br />
  3. 3. Measurements<br />Range over orders of magnitude<br />Measurements difficult<br />Few instruments good over whole range – usually tuned to particular range: urban or background<br />Techniques differ – can give different results<br />Calibration difficult<br />Instrument artefacts complicate analysis and comparison<br />Good qualitative measurement<br />
  4. 4. Aethalometer – Malin Head<br />
  5. 5. Aethalometer<br />
  6. 6. Mace Head Malin Head monthly averages<br />
  7. 7. YEAR 2002: % BC below 75 ngm-3 for whole year 59%<br />
  8. 8.
  9. 9. YEAR 2003: % BC below 75 ngm-3 for whole year 62%<br />
  10. 10.
  11. 11. YEAR 2005 : BLACK CARBON FREQUENCY BELOW 50 NG M-3<br />Average year: 53% of times BC is below 50ng/m3<br />
  12. 12. 2005<br />
  13. 13. YEAR 2006 : BLACK CARBON FREQUENCY BELOW 50 NG M-3<br />During August 85% of the time BC is below 50ng m-3, 50% below 15ng/m3!<br />
  14. 14. 2006<br />
  15. 15. YEAR 2007 : BLACK CARBON FREQUENCY BELOW 50 NG M-3<br />(no october for 2007)<br />January really cleaned, again August the cleanest of summer months <br />(75% cleaner than 30ng m-3 for August)<br />
  16. 16. 2007<br />
  17. 17. Average frequency of occurrence<br />
  18. 18. Average Frequency by month<br />

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