Arid
DOI10.5194/bg-12-5771-2015
Modeling the global emission, transport and deposition of trace elements associated with mineral dust
Zhang, Y.1; Mahowald, N.2; Scanza, R. A.2; Journet, E.3,4; Desboeufs, K.3,4; Albani, S.2; Kok, J. F.5; Zhuang, G.1; Chen, Y.1; Cohen, D. D.6; Paytan, A.7; Patey, M. D.8; Achterberg, E. P.8,10; Engelbrecht, J. P.9; Fomba, K. W.11
通讯作者Zhang, Y.
来源期刊BIOGEOSCIENCES
ISSN1726-4170
EISSN1726-4189
出版年2015
卷号12期号:19页码:5771-5792
英文摘要

Trace element deposition from desert dust has important impacts on ocean primary productivity, the quantification of which could be useful in determining the magnitude and sign of the biogeochemical feedback on radiative forcing. However, the impact of elemental deposition to remote ocean regions is not well understood and is not currently included in global climate models. In this study, emission inventories for eight elements primarily of soil origin, Mg, P, Ca, Mn, Fe, K, Al, and Si are determined based on a global mineral data set and a soil data set. The resulting elemental fractions are used to drive the desert dust model in the Community Earth System Model (CESM) in order to simulate the elemental concentrations of atmospheric dust. Spatial variability of mineral dust elemental fractions is evident on a global scale, particularly for Ca. Simulations of global variations in the Ca / Al ratio, which typically range from around 0.1 to 5.0 in soils, are consistent with observations, suggesting that this ratio is a good signature for dust source regions. The simulated variable fractions of chemical elements are sufficiently different; estimates of deposition should include elemental variations, especially for Ca, Al and Fe. The model results have been evaluated with observations of elemental aerosol concentrations from desert regions and dust events in non-dust regions, providing insights into uncertainties in the modeling approach. The ratios between modeled and observed elemental fractions range from 0.7 to 1.6, except for Mg and Mn (3.4 and 3.5, respectively). Using the soil database improves the correspondence of the spatial heterogeneity in the modeling of several elements (Ca, Al and Fe) compared to observations. Total and soluble dust element fluxes to different ocean basins and ice sheet regions have been estimated, based on the model results. The annual inputs of soluble Mg, P, Ca, Mn, Fe and K associated with dust using the mineral data set are 0.30 Tg, 16.89 Gg, 1.32 Tg, 22.84 Gg, 0.068 Tg, and 0.15 Tg to global oceans and ice sheets.


类型Article
语种英语
国家Peoples R China ; USA ; France ; Australia ; England ; Germany
收录类别SCI-E
WOS记录号WOS:000362972200014
WOS关键词BIOMASS BURNING AEROSOLS ; ATMOSPHERIC DUST ; NORTH-ATLANTIC ; SAHARAN DUST ; AFRICAN DUST ; PARTICULATE POLLUTION ; CHEMICAL-COMPOSITION ; SIZE-DISTRIBUTION ; HARMATTAN DUST ; DESERT DUST
WOS类目Ecology ; Geosciences, Multidisciplinary
WOS研究方向Environmental Sciences & Ecology ; Geology
来源机构Desert Research Institute ; University of California, Los Angeles
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186214
作者单位1.Fudan Univ, Dept Environm Sci & Engn, Shanghai Key Lab Atmospher Particle Pollut & Prev, Shanghai 200433, Peoples R China;
2.Cornell Univ, Dept Earth & Atmospher Sci, Ithaca, NY USA;
3.Univ Paris Est Creteil, LISA, UMR CNRS7583, Creteil, France;
4.Univ Paris Diderot, Creteil, France;
5.Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA;
6.Australian Nucl Sci & Technol Org, Kirrawee Dc, NSW 2232, Australia;
7.Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA;
8.Univ Southampton, Natl Oceanog Ctr Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England;
9.Desert Res Inst, Reno, NV 89512 USA;
10.Helmholtz Ctr Ocean Res, GEOMAR, D-24148 Kiel, Germany;
11.Leibniz Inst Tropospher Res TROPOS, D-04318 Leipzig, Germany
推荐引用方式
GB/T 7714
Zhang, Y.,Mahowald, N.,Scanza, R. A.,et al. Modeling the global emission, transport and deposition of trace elements associated with mineral dust[J]. Desert Research Institute, University of California, Los Angeles,2015,12(19):5771-5792.
APA Zhang, Y..,Mahowald, N..,Scanza, R. A..,Journet, E..,Desboeufs, K..,...&Fomba, K. W..(2015).Modeling the global emission, transport and deposition of trace elements associated with mineral dust.BIOGEOSCIENCES,12(19),5771-5792.
MLA Zhang, Y.,et al."Modeling the global emission, transport and deposition of trace elements associated with mineral dust".BIOGEOSCIENCES 12.19(2015):5771-5792.
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