Arid
DOI10.1029/2011JD016909
Single scattering albedo of fine mineral dust aerosols controlled by iron concentration
Moosmueller, Hans1; Engelbrecht, Johann P.1; Skiba, Michal1,2; Frey, Garrett1,3; Chakrabarty, Rajan K.1; Arnott, W. Patrick1,4
通讯作者Moosmueller, Hans
来源期刊JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
EISSN2169-8996
出版年2012
卷号117
英文摘要

Sign and magnitude of solar aerosol direct radiative forcing are largely determined by the aerosol single scattering albedo (SSA) and the albedo of the underlying scene (e. g., surface albedo). On a global scale, mineral dust aerosol has the largest mass emission rate, average column mass burden, and average optical depth of all aerosol types. Therefore, better understanding of its optical properties with a focus on SSA is of great importance. Here, we entrain ten bulk soil samples from deserts and semi-arid regions in the Arabian Peninsula, from locations representative of the Sahara and Sahel in North Africa, and from Northeast Africa and South-Central Asia. We segregate the fine particle fraction (aerodynamic diameter < 2.5 mu m) and measure its iron content with an x-ray fluorescence (XRF) spectrometer and its aerosol SSA and absorption, scattering, and extinction Angstrom coefficients for two wavelengths (405 nm and 870 nm) with a photoacoustic instrument with integrating reciprocal nephelometer. Results show that SSA is much lower at 405 nm than at 870 nm and that SSA at both wavelengths is dominated by and linearly correlated with the iron content of the entrained mineral dust. The second result points toward potential use of SSA remote sensing to measure aerosol iron content and vice versa, measurements of iron content with simple filter sampling followed by XRF analysis, providing an assessment of SSA for aerosol radiative forcing calculations and modeling. Average Angstrom coefficients were approximate to 3.2 for absorption, approximate to-0.4 for scattering, and approximate to-0.3 for extinction and showed little correlation with iron content.


类型Article
语种英语
国家USA ; Poland
收录类别SCI-E
WOS记录号WOS:000305147900001
WOS关键词LIGHT-ABSORPTION ; OPTICAL-PROPERTIES ; SIZE DISTRIBUTION ; RADIATION BUDGET ; CALIBRATION ; NEPHELOMETER ; CLIMATOLOGY ; PARTICLES ; TRANSPORT ; SAMPLES
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构Desert Research Institute
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/173602
作者单位1.Nevada Syst Higher Educ, Desert Res Inst, Reno, NV 89512 USA;
2.Jagiellonian Univ, Inst Geol Sci, Krakow, Poland;
3.Univ Nevada, Dept Geol Sci & Engn, Reno, NV 89557 USA;
4.Univ Nevada, Dept Phys, Reno, NV 89557 USA
推荐引用方式
GB/T 7714
Moosmueller, Hans,Engelbrecht, Johann P.,Skiba, Michal,et al. Single scattering albedo of fine mineral dust aerosols controlled by iron concentration[J]. Desert Research Institute,2012,117.
APA Moosmueller, Hans,Engelbrecht, Johann P.,Skiba, Michal,Frey, Garrett,Chakrabarty, Rajan K.,&Arnott, W. Patrick.(2012).Single scattering albedo of fine mineral dust aerosols controlled by iron concentration.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,117.
MLA Moosmueller, Hans,et al."Single scattering albedo of fine mineral dust aerosols controlled by iron concentration".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 117(2012).
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