Joseph R. Scudlark, Kathryn M. Conko, Thomas M. Church
Atmospheric wet deposition of trace elements to chesapeake bay: CBAD study year 1 results
Atmospheric Environment, Volume 28, Issue 8, May 1994, Pages 1487–1498
ISSN: 1352-2310
http://www.worldcat.org/oclc/610395849University of Delaware, College of Marine Studies, 700 Pilottown Road, Lewes, DE 19958, U.S.A.
Joseph R. Scudlark University of Delaware, College of Marine Studies, 700 Pilottown Road, Lewes, DE 19958, U.S.A.
Kathryn M. Conko University of Delaware, College of Marine Studies, 700 Pilottown Road, Lewes, DE 19958, U.S.A.
Thomas M. Church University of Delaware, College of Marine Studies, 700 Pilottown Road, Lewes, DE 19958, U.S.A.
"Abstract
The atmospheric wet deposition of selected trace elements (AI,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 (µg m-² yr-1) from the two sites were as follows: AI (13,600), As (49), Cd (48), Cr (88), Cu (260), Fe (10,400), Mn (1190), Ni (257), Pb (556), Se (214) and Zn (1335). With the exception of AI, 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.
Keywords
Precipitation; trace elements; deposition; Chesapeake Bay"
http://www.sciencedirect.com/science/article/pii/1352231094902097http://en.wikipedia.org/wiki/Deposition_(aerosol_physics)
http://simple.wikipedia.org/wiki/Deposition
