Mineral particle size as a control on aerosol iron solubility

被引:195
作者
Baker, A. R. [1 ]
Jickells, T. D. [1 ]
机构
[1] Univ E Anglia, Sch Environm Sci, Lab Global Marine & Atmospher Chem, Norwich NR4 7TJ, Norfolk, England
基金
英国自然环境研究理事会;
关键词
D O I
10.1029/2006GL026557
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Aerosol iron solubility is a major uncertainty in the global biogeochemical cycle of iron and, via its impact on ocean productivity, the carbon cycle and their influence on global climate. Previous studies have reported widely different values for this solubility (0.01 - 80%). Here we show that the primary control on aerosol iron solubility is the surface area to volume ratio of mineral aerosol particles, which changes during atmospheric transport as mineral aerosol concentration decreases due to preferential removal of larger particles ( assuming particle morphology to be relatively constant with particle size). This important result indicates that aerosol iron solubility is not fixed, but will change predictably as an inverse function of dust concentration on both spatial and temporal (e.g. glacial interglacial) scales.
引用
收藏
页数:4
相关论文
共 37 条
[1]   Physical characteristics of Saharan dust near the Gulf of Guinea [J].
Afeti, GM ;
Resch, FJ .
ATMOSPHERIC ENVIRONMENT, 2000, 34 (08) :1273-1279
[2]   ATMOSPHERIC TRACE-ELEMENTS AT ENEWETAK ATOLL .2. TRANSPORT TO THE OCEAN BY WET AND DRY DEPOSITION [J].
ARIMOTO, R ;
DUCE, RA ;
RAY, BJ ;
UNNI, CK .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1985, 90 (ND1) :2391-2408
[3]   Mass-particle size distributions of atmospheric dust and the dry deposition of dust to the remote ocean [J].
Arimoto, R ;
Ray, BJ ;
Lewis, NF ;
Tomza, U ;
Duce, RA .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1997, 102 (D13) :15867-15874
[4]   Trends in aerosol nutrient solubility along a west-east transect of the Saharan dust plume [J].
Baker, AR ;
French, M ;
Linge, KL .
GEOPHYSICAL RESEARCH LETTERS, 2006, 33 (07)
[5]   Trends in the solubility of iron, aluminium, manganese and phosphorus in aerosol collected over the Atlantic Ocean [J].
Baker, AR ;
Jickells, TD ;
Witt, M ;
Linge, KL .
MARINE CHEMISTRY, 2006, 98 (01) :43-58
[6]   Dissolution of atmospheric iron in seawater [J].
Bonnet, S ;
Guieu, C .
GEOPHYSICAL RESEARCH LETTERS, 2004, 31 (03) :L033031-4
[7]   Dust impact on marine biota and atmospheric CO2 during glacial periods -: art. no. 1046 [J].
Bopp, L ;
Kohfeld, KE ;
Le Quéré, C ;
Aumont, O .
PALEOCEANOGRAPHY, 2003, 18 (02) :24-1
[8]   Iron, manganese, and lead at Hawaii Ocean Time-series station ALOHA: Temporal variability and an intermediate water hydrothermal plume [J].
Boyle, EA ;
Bergquist, BA ;
Kayser, RA ;
Mahowald, N .
GEOCHIMICA ET COSMOCHIMICA ACTA, 2005, 69 (04) :933-952
[9]   Seasonal and spatial distributions and dry deposition fluxes of atmospheric total and labile iron over the tropical and subtropical North Atlantic Ocean [J].
Chen, Y ;
Siefert, RL .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2004, 109 (D9) :D093051-14
[10]   Factors influencing aerosol solubility during cloud processes [J].
Desboeufs, KV ;
Losno, R ;
Colin, JL .
ATMOSPHERIC ENVIRONMENT, 2001, 35 (20) :3529-3537