Airsheds: Oxidized-Nitrogen Deposition into Coastal Estuaries

Summarized Characteristics of Principal Airsheds for Oxidized-Nitrogen Depositon
Percentiles	Principal Ox-N Airshed Area (km²)	Size Factor Over Watershed Area	% Ox-N Deposition Explained by Airshed Emissions	Airshed NOx Emissions as % of E. North American Emissions
Maximum	1,081,600 Chesapeake Bay	584 Delaware Inland Bays	76 Chesapeake Bay Tampa Bay	34 Chesapeake Bay
80^th	896,000 Long Island Sound Winyah Bay	176 Great Bay Narragansett Bay	71.5 Narragansett Bay Long Island Sound	23.5 Winyah Bay Long Island Sound
50^th	662,000 Pamlico Sound Lake Pontchartrain	23.5 Pamlico Sound Long Island Sound	65 Barnegat Bay Pamlico Sound	16.5 Apalachicola Bay Barnegat Bay
20^th	474,000 Barnegat Bay Alapachee Bay	17.5 Altamaha Lake Pontchartrain	57.5 St. Helena Sound Charleston Harbor	10.5 St. Helena Sound Casco Bay
Minimum	256,000 Tampa Bay	6.5 Chesapeake Bay	47 Casco Bay	5 Tampa Bay
80^th/20^th	1.9	10.1
1/2 (80-20^th) Spread as % of 50^th	+/- 32%	na	+/- 11%	+/- 39%

Contacts: Robin Dennis

Paerl H.W., Dennis, R.L., Whitall, D.R., Atmospheric deposition of nitrogen: Implications for nutrient over-enrichment of coastal waters, Estuaries 25(4B), 677-693, 2002. (abstract)