Show simple item record

AuthorAlfred K, Hanson
AuthorTindale, Neil W
AuthorAbdel-Moati, Mohamed A.R
Available date2024-05-16T08:52:49Z
Publication Date2001-03-14
Publication NameMarine Chemistry
Identifierhttp://dx.doi.org/10.1016/S0304-4203(01)00027-5
CitationHanson, A. K., Tindale, N. W., & Abdel-Moati, M. A. (2001). An Equatorial Pacific rain event: influence on the distribution of iron and hydrogen peroxide in surface waters. Marine Chemistry, 75(1-2), 69-88.
ISSN0304-4203
URIhttps://www.sciencedirect.com/science/article/pii/S0304420301000275
URIhttp://hdl.handle.net/10576/55060
AbstractThe wet deposition of iron and peroxides was monitored during an intense rain squall in the equatorial Pacific Ocean. Iron and hydrogen peroxide were determined at sea using adsorptive cathodic stripping voltammetry (ACSV) and an enzyme-catalyzed flourometric technique, respectively. The equatorial rainwater was enriched in ACSV reactive iron (average 2.7 nmol Fe kg−1) and hydrogen peroxide (average 8.5 μmol kg−1) relative to the concentrations found in surface seawater (0.05–0.07 nmol Fe kg−1; 40–70 nmol peroxides kg−1). Wet depositional fluxes during the squall varied from 70 to 105 nmol Fe m−2 h−1 and from 56 to 880 μmol peroxide m−2 h−1. The input of rainwater into the surface layer was documented by using hydrogen peroxide and iron signals as well as the depression in surface salinity as tracers. The squall created a patch of lower-salinity surface seawater that was relatively enriched in ACSV reactive iron (0.2–0.3 nmol Fe kg−1) and peroxides (200–300 nmol kg−1). The observed concentrations of iron and peroxides in rainwater, their wet-depositional fluxes, and their initial sea surface enrichments, were quantitatively consistent with independent predictions based on applicable iron aerosol and gas-phase peroxide scavenging models for the region.
SponsorFunding for this research was provided by grants from the Office of Naval Research (Nos. N00014-91-J-4054 to A.K.H. and N00014-90-J-1355 to N.W.T.), the U.S. Environmental Protection Agency (Order No. 4N-0490-NAEX to A.K.H.) and the Fulbright Scholarship Program (M.A.R.A-B).
Languageen
PublisherElsevier
SubjectIron
Hydrogen peroxide
Equatorial Pacific Ocean
TitleAn Equatorial Pacific rain event: influence on the distribution of iron and hydrogen peroxide in surface waters
TypeArticle
Issue Number1-2
Volume Number75
ESSN1872-7581
dc.accessType Full Text


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record