PPT Slide
Notes:
We recently came across a small but very useful batch of Canadian data that (someone who deserves a medal) had submitted to the EPA AIRS database. From AIRS, it has become quite easy for us to extract any air quality data in the highly useful “Voyager” format - using the AIRS/Voyager Data Delivery System, developed at the Center for Air Pollution Impact and Trend Analysis (CAPITA), with funding support from EPA OAQPS, NESCAUM and EPA-New England.. Such data can then be explored, merged with other data sets, and analyzed with the (freeware) Voyager Data Visualization software, available via Internet at http://capita.wustl.edu under the “Software Utilities” page.
SO2 data from a site in the northwest corner of Montreal was of particular interest here. While the timing of VT As and Montreal SO2 was typically offset by a day or 2, nearly every VT As “hit was accompanied by a SO2 “hit” in Montreal a day before or after.
So what kinds of large, distant, northern point sources emit SO2 and arsenic?