globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2014JD021744
论文题名:
Properties of light-absorbing aerosols in the Nagoya urban area, Japan, in August 2011 and January 2012: Contributions of brown carbon and lensing effect
作者: Nakayama T.; Ikeda Y.; Sawada Y.; Setoguchi Y.; Ogawa S.; Kawana K.; Mochida M.; Ikemori F.; Matsumoto K.; Matsumi Y.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 2169897X
出版年: 2014
卷: 119, 期:22
起始页码: 12721
结束页码: 12739
语种: 英语
英文关键词: aerosol optical properties ; black carbon (BC) ; brown carbon (BrC) ; lensing effect
Scopus关键词: aerosol ; black carbon ; light effect ; seasonal variation ; temperature effect ; urban area ; vaporization ; Aichi ; Chubu ; Honshu ; Japan ; Japan ; Nagoya
英文摘要: The optical properties of aerosols at 405 and 781 nm were measured in an urban site in Nagoya, Japan, in August 2011 and in January 2012 using a photoacoustic spectrometer. Comparison of the absorption coefficient at 781 nm of aerosols that did and did not pass through a thermo-denuder showed that an increase in black carbon (BC) light absorption due to the coating of non-refractory materials (i.e., the lensing effect) was small (on average, 10%) in August and negligible in January. The effective density distributions for the particles that did and did not pass through the thermo-denuder, which were measured simultaneously in August, suggested that the majority of BC particles sampled had a minimal coating. The small lensing effect observed can be explained partly by assuming that a large portion of non-refractory materials was mixed externally with BC. The contribution of direct light absorption by organic matter (OM) that vaporized at temperatures below 300°C to the total light absorption at 405 nm was negligible in August, but those by OM that vaporized below 300 and 400°C averaged 11 and 17%, respectively, in January. The larger contribution of light-absorbing OM in January is likely due to the greater contribution of OM originating from the burning of biomass, including biofuel and agricultural residue, in Japan, northern China, or Siberia, during the winter. ©2014. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63030
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Solar-Terrestrial Environment Laboratory, Graduate School of Science, Nagoya University, Nagoya, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Nagoya City Institute for Environmental Sciences, Nagoya, Japan; Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu, Japan

Recommended Citation:
Nakayama T.,Ikeda Y.,Sawada Y.,et al. Properties of light-absorbing aerosols in the Nagoya urban area, Japan, in August 2011 and January 2012: Contributions of brown carbon and lensing effect[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(22)
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