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Titolo:
ATMOSPHERIC INPUT OF INORGANIC NITROGEN TO DELAWARE BAY
Autore:
SCUDLARK JR; CHURCH TM;
Indirizzi:
UNIV DELAWARE,COLL MARINE STUDIES,700 PILOTTOWN RD LEWES DE 19958
Titolo Testata:
Estuaries
fascicolo: 4, volume: 16, anno: 1993,
pagine: 747 - 759
SICI:
0160-8347(1993)16:4<747:AIOINT>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
COASTAL WATERS; DEPOSITION; ESTUARY; PRECIPITATION; PHYTOPLANKTON; ECOSYSTEM; FLUX; PRODUCTIVITY; TROPOSPHERE; ENHANCEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
63
Recensione:
Indirizzi per estratti:
Citazione:
J.R. Scudlark e T.M. Church, "ATMOSPHERIC INPUT OF INORGANIC NITROGEN TO DELAWARE BAY", Estuaries, 16(4), 1993, pp. 747-759

Abstract

The coastal waters of the mid-Atlantic region of the United States receive inputs of atmospheric pollutants as a consequence of being located downwind from major industrial and urban emissions. These inputs are potentially the largest received by any marine area of the country. Of current interest is the atmospheric input of dissolved inorganic nitrogen (DIN = NO3- + NH4+). We have conducted a first-order examination of the magnitude of atmospheric DIN deposition relative to other large-scale inputs for Delaware Bay, a partially urbanized mid-Atlantic coastal plain estuary. The following loading terms: direct atmospheric deposition, indirect atmospheric loading, urban point discharges, fluvial input, benthic flux, and salt marsh export were evaluated. On an annual basis, municipal-industrial effluent provide a dominant source (ca. 40%) of the DIN input to the estuary. Total (wet plus dry) atmospheric deposition accounts for about 15% of the total annual DIN inputs. However, during summer, which is characterized by low river-flow and seasonally maximum atmospheric loading, this figure increases to around 25%. Although atmospheric input can satisfy only a fraction of the primary production demands, this summer flux may represent an ecologically important source Of external DIN, half of which is directly deposited to surface photic zones where it is readily available for biological uptake.

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Documento generato il 30/11/20 alle ore 19:47:41