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Titolo:
REACTIVE MERCURY IN THE EASTERN NORTH-ATLANTIC AND SOUTHEAST ATLANTIC
Autore:
DALZIEL JA;
Indirizzi:
FISHERIES & OCEANS CANADA,BEDFORD INST OCEANOG,PHYS & CHEM SCI BRANCH,POB 1006 DARTMOUTH NS B2Y 4A2 CANADA
Titolo Testata:
Marine chemistry
fascicolo: 4, volume: 49, anno: 1995,
pagine: 307 - 314
SICI:
0304-4203(1995)49:4<307:RMITEN>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-STAGE GOLD AMALGAMATION; EQUATORIAL PACIFIC-OCEAN; GAS-PHASE DETECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
J.A. Dalziel, "REACTIVE MERCURY IN THE EASTERN NORTH-ATLANTIC AND SOUTHEAST ATLANTIC", Marine chemistry, 49(4), 1995, pp. 307-314

Abstract

The vertical distribution of reactive mercury has been measured at two stations in the eastern North Atlantic and one station in the southeast Atlantic in conjunction with the IOC Open Ocean Baseline Survey. The average concentrations of reactive Hg in vertical profiles ranged from 0.70 to 1.07 pM with the highest values found at the northeast Atlantic stations and the lowest at the southeast station. No significantconcentration gradients were found below the surface mixed layer at the two stations in the eastern North Atlantic. At station 7, in the southeast Atlantic, an increase in reactive Hg was noted in the water adjacent to the mixed layer (35-200 m) which was coincident with an oxygen depletion, down to 20% saturation at 200 m. The concentration of reactive Hg in the North Atlantic Deep Water (0.48-1.34 pM), the Antarctic Intermediate Water (0.47 pM), the Antarctic Bottom Water (0.67-1.25pM), and the Mediterranean Outflow Water (0.83-1.06 pM) were noted. The trends in Hg concentration in the water masses between stations showed the concentration decreasing with distance from the water mass source except for Hg in the Antarctic Bottom Water. The increase noted inthis water mass was attributed to mixing with North Atlantic Deep Water and or release from bottom sediments.

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Documento generato il 27/11/20 alle ore 13:37:06