DOI: 10.1002/2016GL069786
论文题名: The interplay between assumed morphology and the direct radiative effect of light-absorbing organic aerosol
作者: Saleh R. ; Adams P.J. ; Donahue N.M. ; Robinson A.L.
刊名: Geophysical Research Letters
ISSN: 0094-8743
EISSN: 1944-8474
出版年: 2016
卷: 43, 期: 16 起始页码: 8735
结束页码: 8743
语种: 英语
英文关键词: brown carbon
; DRE
; light-absorbing OA
; morphology
; radiative transfer
Scopus关键词: Aerosols
; Radiative transfer
; Brown carbons
; Complex morphology
; Numerical experiments
; Optical behavior
; Parametrizations
; Radiative effects
; Radiative transfer model
; Top of the atmospheres
; Morphology
英文摘要: Mie theory is widely employed in aerosol top-of-the-atmosphere direct radiative effect (DRE) calculations and to retrieve the absorptivity of light-absorbing organic aerosol (OA) from measurements. However, when OA is internally mixed with black carbon, it may exhibit complex morphologies whose optical behavior is imperfectly predicted by Mie theory, introducing bias in the retrieved absorptivities. We performed numerical experiments and global radiative transfer modeling (RTM) to investigate the effect of this bias on the calculated absorption and thus the DRE. We show that using true OA absorptivity, retrieved with a realistic representation of the complex morphology, leads to significant errors in DRE when the RTM employs the simplified Mie theory. On the other hand, when Mie theory is consistently applied in both OA absorptivity retrieval and the RTM, the errors largely cancel out, yielding accurate DRE. As long as global RTMs use Mie theory, they should implement parametrizations of light-absorbing OA derived from retrievals based on Mie theory. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983234026&doi=10.1002%2f2016GL069786&partnerID=40&md5=15e61b883ef8c019df70b87c078dcf94
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9706
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: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh, PA, United States
Recommended Citation:
Saleh R.,Adams P.J.,Donahue N.M.,et al. The interplay between assumed morphology and the direct radiative effect of light-absorbing organic aerosol[J]. Geophysical Research Letters,2016-01-01,43(16).