Short residence time for iron in surface seawater impacted by atmospheric dry deposition from Saharan dust events

Peter L. Croot; Peter Streu; Alex R. Baker

doi:10.1029/2004GL020153

Short residence time for iron in surface seawater impacted by atmospheric dry deposition from Saharan dust events

Peter L. Croot, Peter Streu, Alex R. Baker

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105 Citations (Scopus)

Abstract

Measurements of dissolved (DFe) and total iron (TFe) in the upper water column are presented from the German SOLAS (Surface Ocean - Lower Atmosphere Study) cruise (M55), along a west to east transect at 10°N, in the equatorial Atlantic in October/November 2002. Aerosol samples were collected simultaneously during this time and are used to estimate an iron flux to the surface waters. Resulting flux estimates combined with iron inventories in the near surface waters reveal extremely short fractional mean residence times (6–62 days) for total (dissolved and particulate) iron in waters directly under the path of Saharan dust plumes. These results suggest that individual dust storms can supply a significant amount of the present iron upper water column inventory which is subsequent rapidly removed by aggregation and sinking.

Original language	English
Journal	Geophysical Research Letters
Volume	31
Issue number	23
DOIs	https://doi.org/10.1029/2004GL020153
Publication status	Published - 2004

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10.1029/2004GL020153

Cite this

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title = "Short residence time for iron in surface seawater impacted by atmospheric dry deposition from Saharan dust events",

abstract = "Measurements of dissolved (DFe) and total iron (TFe) in the upper water column are presented from the German SOLAS (Surface Ocean - Lower Atmosphere Study) cruise (M55), along a west to east transect at 10°N, in the equatorial Atlantic in October/November 2002. Aerosol samples were collected simultaneously during this time and are used to estimate an iron flux to the surface waters. Resulting flux estimates combined with iron inventories in the near surface waters reveal extremely short fractional mean residence times (6–62 days) for total (dissolved and particulate) iron in waters directly under the path of Saharan dust plumes. These results suggest that individual dust storms can supply a significant amount of the present iron upper water column inventory which is subsequent rapidly removed by aggregation and sinking.",

author = "Croot, {Peter L.} and Peter Streu and Baker, {Alex R.}",

year = "2004",

doi = "10.1029/2004GL020153",

language = "English",

volume = "31",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "American Geophysical Union",

number = "23",

}

TY - JOUR

T1 - Short residence time for iron in surface seawater impacted by atmospheric dry deposition from Saharan dust events

AU - Croot, Peter L.

AU - Streu, Peter

AU - Baker, Alex R.

PY - 2004

Y1 - 2004

N2 - Measurements of dissolved (DFe) and total iron (TFe) in the upper water column are presented from the German SOLAS (Surface Ocean - Lower Atmosphere Study) cruise (M55), along a west to east transect at 10°N, in the equatorial Atlantic in October/November 2002. Aerosol samples were collected simultaneously during this time and are used to estimate an iron flux to the surface waters. Resulting flux estimates combined with iron inventories in the near surface waters reveal extremely short fractional mean residence times (6–62 days) for total (dissolved and particulate) iron in waters directly under the path of Saharan dust plumes. These results suggest that individual dust storms can supply a significant amount of the present iron upper water column inventory which is subsequent rapidly removed by aggregation and sinking.

AB - Measurements of dissolved (DFe) and total iron (TFe) in the upper water column are presented from the German SOLAS (Surface Ocean - Lower Atmosphere Study) cruise (M55), along a west to east transect at 10°N, in the equatorial Atlantic in October/November 2002. Aerosol samples were collected simultaneously during this time and are used to estimate an iron flux to the surface waters. Resulting flux estimates combined with iron inventories in the near surface waters reveal extremely short fractional mean residence times (6–62 days) for total (dissolved and particulate) iron in waters directly under the path of Saharan dust plumes. These results suggest that individual dust storms can supply a significant amount of the present iron upper water column inventory which is subsequent rapidly removed by aggregation and sinking.

U2 - 10.1029/2004GL020153

DO - 10.1029/2004GL020153

M3 - Article

VL - 31

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 23

ER -