Size distribution and depolarization properties of aerosol particles over the northwest pacific and arctic ocean from shipborne measurements during an R/V xuelong cruise

Yu Tian, Xiaole Pan, Jinpei Yan, Qi Lin, Yele Sun, Mei Li, Conghui Xie, Itsushi Uno, Hang Liu, Zhe Wang, Pingqing Fu, Zifa Wang

研究成果: ジャーナルへの寄稿記事

抄録

Atmospheric aerosols over polar regions have attracted considerable attention for their pivotal effects on climate change. In this study, temporospatial variations in single-particle-based depolarization ratios (?: s-polarized component divided by the total backward scattering intensity) were studied over the Northwest Pacific and the Arctic Ocean using an optical particle counter with a depolarization module. The δvalue of aerosols was 0.06 ± 0.01 for the entire observation period, 61 ± 10% lower than the observations for coastal Japan (0.12 ± 0.02) (Pan et al. Atmos. Chem. Phys. 2016, 16, 9863-9873) and inland China (0.19 ± 0.02) (Tian et al. Atmos. Chem. Phys. 2018, 18, 18203-18217) in summer. The volume concentration showed two dominant size modes at 0.9 and 2 μm. The supermicrometer particles were mostly related to sea-salt aerosols with a δvalue of 0.09 over marine polar areas, ?22% larger than in the low-latitude region because of differences in chemical composition and dry air conditions. The δvalues for fine particles (<1 μm) were 0.05 ± 0.1, 50% lower than inland anthropogenic pollutants, mainly because of the complex mixtures of submicrometer sea salts. High particle concentrations in the Arctic Ocean could mostly be attributed to the strong marine emission of sea salt associated with deep oceanic cyclones, whereas long-range transport pollutants from the continent were among the primary causes of high particle concentrations in the Northwest Pacific region.

元の言語英語
ページ(範囲)7984-7995
ページ数12
ジャーナルEnvironmental Science and Technology
53
発行部数14
DOI
出版物ステータス出版済み - 7 16 2019

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shipborne measurement
Depolarization
Aerosols
Salts
aerosol
sea salt
Atmospheric aerosols
Radiation counters
Complex Mixtures
Climate change
Scattering
pollutant
long range transport
polar region
Air
Chemical analysis
cyclone
particle
Arctic Ocean
chemical composition

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

これを引用

Size distribution and depolarization properties of aerosol particles over the northwest pacific and arctic ocean from shipborne measurements during an R/V xuelong cruise. / Tian, Yu; Pan, Xiaole; Yan, Jinpei; Lin, Qi; Sun, Yele; Li, Mei; Xie, Conghui; Uno, Itsushi; Liu, Hang; Wang, Zhe; Fu, Pingqing; Wang, Zifa.

:: Environmental Science and Technology, 巻 53, 番号 14, 16.07.2019, p. 7984-7995.

研究成果: ジャーナルへの寄稿記事

Tian, Yu ; Pan, Xiaole ; Yan, Jinpei ; Lin, Qi ; Sun, Yele ; Li, Mei ; Xie, Conghui ; Uno, Itsushi ; Liu, Hang ; Wang, Zhe ; Fu, Pingqing ; Wang, Zifa. / Size distribution and depolarization properties of aerosol particles over the northwest pacific and arctic ocean from shipborne measurements during an R/V xuelong cruise. :: Environmental Science and Technology. 2019 ; 巻 53, 番号 14. pp. 7984-7995.
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abstract = "Atmospheric aerosols over polar regions have attracted considerable attention for their pivotal effects on climate change. In this study, temporospatial variations in single-particle-based depolarization ratios (?: s-polarized component divided by the total backward scattering intensity) were studied over the Northwest Pacific and the Arctic Ocean using an optical particle counter with a depolarization module. The δvalue of aerosols was 0.06 ± 0.01 for the entire observation period, 61 ± 10{\%} lower than the observations for coastal Japan (0.12 ± 0.02) (Pan et al. Atmos. Chem. Phys. 2016, 16, 9863-9873) and inland China (0.19 ± 0.02) (Tian et al. Atmos. Chem. Phys. 2018, 18, 18203-18217) in summer. The volume concentration showed two dominant size modes at 0.9 and 2 μm. The supermicrometer particles were mostly related to sea-salt aerosols with a δvalue of 0.09 over marine polar areas, ?22{\%} larger than in the low-latitude region because of differences in chemical composition and dry air conditions. The δvalues for fine particles (<1 μm) were 0.05 ± 0.1, 50{\%} lower than inland anthropogenic pollutants, mainly because of the complex mixtures of submicrometer sea salts. High particle concentrations in the Arctic Ocean could mostly be attributed to the strong marine emission of sea salt associated with deep oceanic cyclones, whereas long-range transport pollutants from the continent were among the primary causes of high particle concentrations in the Northwest Pacific region.",
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AU - Tian, Yu

AU - Pan, Xiaole

AU - Yan, Jinpei

AU - Lin, Qi

AU - Sun, Yele

AU - Li, Mei

AU - Xie, Conghui

AU - Uno, Itsushi

AU - Liu, Hang

AU - Wang, Zhe

AU - Fu, Pingqing

AU - Wang, Zifa

PY - 2019/7/16

Y1 - 2019/7/16

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