great lakes areas of concern u.s. urban areas (pink shading)

7
Great Lakes Areas of Concern U.S. urban areas (pink shading) Large U.S./Canadian 2005 point sources of mercury Type of Emissions Source coal-fired power plants other fuel combustion waste incineration metallurgical manufacturing & other Emissio ns of Mercury (kg/yr) 10-50 50-100 100–300 5-10 300–500 500–1000 1000–3500

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Great Lakes Areas of Concern U.S. urban areas (pink shading) Large U.S./Canadian 2005 point sources of mercury. Emissions of Mercury (kg/yr). 5-10. 10-50. 50-100. 100–300. 300–500. 500–1000. 1000–3500. Type of Emissions Source. coal-fired power plants. other fuel combustion. - PowerPoint PPT Presentation

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Page 1: Great Lakes Areas of Concern  U.S. urban areas (pink shading)

Great Lakes Areas of Concern U.S. urban areas (pink shading) Large U.S./Canadian 2005 point sources of mercury

Type of Emissions Sourcecoal-fired power plantsother fuel combustionwaste incinerationmetallurgicalmanufacturing & other

Emissions of Mercury (kg/yr)

10-50

50-100

100–300

5-10

300–500

500–1000

1000–3500

Page 2: Great Lakes Areas of Concern  U.S. urban areas (pink shading)

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0 250 500125 Kilometers ´Type of Emissions Source

coal-fired power plantsother fuel combustionwaste incinerationmetallurgicalmanufacturing & other

2005 Hg Emissions (kg/yr)

10-50

100–300

50-100

5-10

300–500

500–1000

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< 5

St. Louis River and Bay AOC

Atmospheric Hg Monitoring Sites

Page 3: Great Lakes Areas of Concern  U.S. urban areas (pink shading)

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0 50 10025 Kilometers ´

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St. Louis River and Bay AOC

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Lake Superior

Ontario

Type of Emissions Sourcecoal-fired power plantsother fuel combustionwaste incinerationmetallurgicalmanufacturing & other

2005 Hg Emissions (kg/yr)

10-50

100–300

50-100

5-10

300–500

500–1000

1000–3000

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MN PowerBoswell

Hibbing Taconite

US SteelKeewatin Taconite

United Taconite Fairlane Plant

MN PowerLaskin

US SteelMinntac

Ispat Inland Steel Mining

Minorca

MURPHY OIL USA INC.SUPERIOR REFINERY

Georgia Pacific

Page 4: Great Lakes Areas of Concern  U.S. urban areas (pink shading)

Mercury Emissions, especially local and regional “current” (2005, 2008, 2011…)

Historical (emissions in the past may have been significantly different, e.g., incinerators?)

This is the primary area that I’d need help… we have to get this right!

“Receptor” details, i.e., what points and/or areas do to have model-estimated deposition? Watershed(s) and sub-watersheds

Lake surface

River?

Interpretation of results? Comparison against mercury “inventory” in AOC (i.e., in sediments and soil)?

Comparison against deposition elsewhere?

Time trend of deposition?

Groundtruthing the results MDN (Hg wet deposition) sites in the region

Ambient Hg air concentration data?

Meteorological modeling data to drive local/regional dispersion simulations Might have to carry out initial analyses using relatively coarse data

If higher-resolution data are needed, these might have to be generated

Some of the issues to think about…

Page 5: Great Lakes Areas of Concern  U.S. urban areas (pink shading)

0 - 15 15 - 30 30 - 60 60 - 120 120 - 250

distance range from source (km)

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10

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30

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2-yr

) fo

r Hg(II) emitHg(p) emit

Hg(0) emit

Local mercury deposition impacts can be dramatically higher than impacts further away from the source

Distance results averaged over all directions: • Areas generally downwind of the source will have higher

deposition fluxes than the averages shown here. • Areas generally upwind will have lower fluxes.

Page 6: Great Lakes Areas of Concern  U.S. urban areas (pink shading)
Page 7: Great Lakes Areas of Concern  U.S. urban areas (pink shading)