DOI: 10.1002/2014GL062404
论文题名: Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties
作者: China S. ; Scarnato B. ; Owen R.C. ; Zhang B. ; Ampadu M.T. ; Kumar S. ; Dzepina K. ; Dziobak M.P. ; Fialho P. ; Perlinger J.A. ; Hueber J. ; Helmig D. ; Mazzoleni L.R. ; Mazzoleni C.
刊名: Geophysical Research Letters
ISSN: 0094-8946
EISSN: 1944-8677
出版年: 2015
卷: 42, 期: 4 起始页码: 1243
结束页码: 1250
语种: 英语
英文关键词: free troposphere
; long-range transport
; morphology
; soot
Scopus关键词: Atmospheric radiation
; Dust
; Mixing
; Morphology
; Optical properties
; Solar radiation
; Troposphere
; Direct radiative forcing
; Discrete dipole approximation
; Electron microscopy analysis
; Free troposphere
; Individual particles
; Long range transport
; Single scattering albedo
; Top of the atmospheres
; Soot
; albedo
; electron microscopy
; marine atmosphere
; Mie theory
; mixing
; observatory
; optical property
; radiative forcing
; simulation
; soot
; troposphere
; Azores
; Pico
; Portugal
英文摘要: The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing is typically smaller for highly compact than mass-equivalent lacy soot. The forcing estimated using Mie theory is within 12% of the forcing estimated using the discrete dipole approximation for a high surface albedo, implying that Mie calculations may provide a reasonable approximation for compact soot above remote marine clouds. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924901735&doi=10.1002%2f2014GL062404&partnerID=40&md5=36fca581576e7a4f27a89dad2d2c51a7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8562
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: Atmospheric Sciences Program, Michigan Technological University, Houghton, MI, United States
Recommended Citation:
China S.,Scarnato B.,Owen R.C.,et al. Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties[J]. Geophysical Research Letters,2015-01-01,42(4).