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Titolo:
ATMOSPHERIC WET DEPOSITION OF TRACE-ELEMENTS TO CHESAPEAKE BAY - CBADSTUDY YEAR-1 RESULTS
Autore:
SCUDLARK JR; CONKO KM; CHURCH TM;
Indirizzi:
UNIV DELAWARE,COLL MARINE STUDIES,700 PILOTTOWN RD LEWES DE 19958
Titolo Testata:
Atmospheric environment
fascicolo: 8, volume: 28, anno: 1994,
pagine: 1487 - 1498
SICI:
1352-2310(1994)28:8<1487:AWDOTT>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
OCEAN SURFACE SEAWATER; METAL CHEMISTRY; FLY-ASH; AEROSOLS; IMPACT; PRECIPITATION; PARTICLES; WATERS;
Keywords:
PRECIPITATION; TRACE ELEMENTS; DEPOSITION; CHESAPEAKE BAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
J.R. Scudlark et al., "ATMOSPHERIC WET DEPOSITION OF TRACE-ELEMENTS TO CHESAPEAKE BAY - CBADSTUDY YEAR-1 RESULTS", Atmospheric environment, 28(8), 1994, pp. 1487-1498

Abstract

The atmospheric wet deposition of selected trace elements (Al,As,Cd.Cr.Cu,Fe,Mn,Ni.Pb,Se and Zn) was examined at two Maryland Chesapeake Bay sites from June 1990 to July 1991 as part of the Chesapeake Bay Atmospheric Deposition (CBAD) Study. Weekly integrated samples were collected using a modified wet-only collector and rigorous trace element handling protocols. Wet depositional fluxes were directly calculated as the product of the elemental concentration and the corresponding measured precipitation depth. The monthly integrated atmospheric fluxes exhibited a high degree of spatial and temporal variability. The arithmetically averaged annual wet flux (mug m-2 yr-1) from the two sites were as follows: Al (13,600), As (49), Cd (48), Cr (88), Cu (260), Fe (10,400), Mn (I 190), Ni (257), Pb (556), Se (214) and Zn (1335). With the exception of Al, Fe and to a lesser extent Mn and Cr, the elemental fluxes are predominantly derived from anthropogenic sources. The magnitude of the measured wet fluxes are generally comparable to simultaneously estimated dry fluxes. Compared with dissolved fluvial inputs, atmospheric deposition appears to provide significant fluxes of many elements of environmental concern.

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Documento generato il 30/11/20 alle ore 19:49:20