GSTDTAP  > 气候变化
DOI10.1029/2020GL092054
Linking the different diameter types of aspherical desert dust indicates that models underestimate coarse dust emission
Yue Huang; Adeyemi A. Adebiyi; Paola Formenti; Jasper F. Kok
2021-03-15
发表期刊Geophysical Research Letters
出版年2021
英文摘要

Measurements of dust aerosol size usually obtain the optical or projected area‐equivalent diameters, whereas model calculations of dust impacts use the geometric or aerodynamic diameters. Accurate conversions between the four diameter types are thus critical. However, most current conversions assume dust is spherical, even though numerous studies show that dust is highly aspherical. Here, we obtain conversions between different diameter types that account for dust asphericity. Our conversions indicate that optical particle counters have underestimated dust geometric diameter (Dgeo) at coarse sizes. We further use the diameter conversions to obtain a consistent observational constraint on the size distribution of emitted dust. This observational constraint is coarser than parameterizations used in global aerosol models, which underestimate the mass of emitted dust within urn:x-wiley:00948276:media:grl62147:grl62147-math-0001 by a factor of ∼2 and usually do not account for the substantial dust emissions with urn:x-wiley:00948276:media:grl62147:grl62147-math-0002. Our findings suggest that models substantially underestimate coarse dust emission.

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领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/319865
专题气候变化
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Yue Huang,Adeyemi A. Adebiyi,Paola Formenti,et al. Linking the different diameter types of aspherical desert dust indicates that models underestimate coarse dust emission[J]. Geophysical Research Letters,2021.
APA Yue Huang,Adeyemi A. Adebiyi,Paola Formenti,&Jasper F. Kok.(2021).Linking the different diameter types of aspherical desert dust indicates that models underestimate coarse dust emission.Geophysical Research Letters.
MLA Yue Huang,et al."Linking the different diameter types of aspherical desert dust indicates that models underestimate coarse dust emission".Geophysical Research Letters (2021).
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