FN Archimer Export Format
PT J
TI A comparison of dissolved and particulate mn and al distributions in the western north-atlantic
BT 
AF YEATS, PA
   DALZIEL, JA
   MORAN, SB
AS 1:;2:;3:;
FF 1:;2:;3:;
C1 WOODS HOLE OCEANOG INST,DEPT CHEM,WOODS HOLE,MA 02543
C2 WOODS HOLE OCEANOG INST,DEPT CHEM,WOODS HOLE,MA 02543
IF 0.662
TC 23
UR https://archimer.ifremer.fr/doc/00101/21186/18803.pdf
LA English
DT Article
DE ;ALUMINUM;MANGANESE;NORTH ATLANTIC OCEAN;REMOVAL MECHANISMS;MANGANESE OXIDATION
AB The dissolved Mn distribution on an oceanographic section along 50-degrees-W in the western North Atlantic shows decreasing concentrations in the offshore direction in the surface layer and with depth at the deep water stations. Leachable particulate Mn concentrations are low in the open ocean surface waters and elevated at intermediate depths. Dissolved Al concentrations in the surface layer are higher in the open ocean than on the shelf and the vertical distributions are characterized by surface maxima, a subsurface minimum at almost-equal-to 1 000 m and increasing concentrations in the deep waters. Leachable particulate Al concentrations are elevated on the shelf and in open ocean surface waters compared to the intermediate and deep waters. The Deep Western Boundary Current has high levels of dissolved Al and leachable particulate Mn and Al, and low levels of dissolved Mn. The distribution of dissolved Al is controlled primarily by inputs from atmospheric dust and removal onto biogenic particles. Both fluvial and atmospheric inputs affect dissolved Mn levels with removal occurring primarily by oxidation of Mn2+. The Al distribution is characterized by short residence times in shelf and surface waters and relatively constant distribution coefficients. The Mn distribution is characterized by longer surface water residence times, shorter deep water residence times, and more widely varying distribution coefficients than Al. Removal of Al by a surface adsorption mechanism and Mn by slower oxidation of Mn2+ are consistent with these observations. A model of Mn oxidation kinetics accurately predicts the intermediate depth leachable particulate Mn maximum.
PY 1992
SO Oceanologica Acta
SN 0399-1784
PU Gauthier-Villars
VL 15
IS 6
UT A1992KQ50000004
BP 609
EP 619
ID 21186
ER

EF