DOI: 10.1002/2016GL069873
论文题名: Predicting the mineral composition of dust aerosols: Insights from elemental composition measured at the Izaña Observatory
作者: Pérez García-Pando C. ; Miller R.L. ; Perlwitz J.P. ; Rodríguez S. ; Prospero J.M.
刊名: Geophysical Research Letters
ISSN: 0094-8550
EISSN: 1944-8281
出版年: 2016
卷: 43, 期: 19 起始页码: 10520
结束页码: 10529
语种: 英语
英文关键词: dust mineral composition
; size distribution
; soil dust
Scopus关键词: Aerosols
; Aggregates
; Aluminum
; Brittle fracture
; Dust
; Minerals
; Observatories
; Size distribution
; Soils
; Brittle fragmentation
; Climate impacts
; Dust concentrations
; Elemental compositions
; Mineral composition
; Regional variation
; Soil composition
; Soil dust
; Climate models
英文摘要: Regional variations of dust mineral composition are fundamental to climate impacts but generally neglected in climate models. A challenge for models is that atlases of soil composition are derived from measurements following wet sieving, which destroys the aggregates potentially emitted from the soil. Aggregates are crucial to simulating the observed size distribution of emitted soil particles. We use an extension of brittle fragmentation theory in a global dust model to account for these aggregates. Our method reproduces the size-resolved dust concentration along with the approximately size-invariant fractional abundance of elements like Fe and Al in the decade-long aerosol record from the Izaña Observatory, off the coast of West Africa. By distinguishing between Fe in structural and free forms, we can attribute improved model behavior to aggregation of Fe and Al-rich clay particles. We also demonstrate the importance of size-resolved measurements along with elemental composition analysis to constrain models. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84991289742&doi=10.1002%2f2016GL069873&partnerID=40&md5=10c15d7b18c48476adae83f242dbe113
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9513
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States
Recommended Citation:
Pérez García-Pando C.,Miller R.L.,Perlwitz J.P.,et al. Predicting the mineral composition of dust aerosols: Insights from elemental composition measured at the Izaña Observatory[J]. Geophysical Research Letters,2016-01-01,43(19).