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首页> 外文期刊>Environmental Science & Technology >Size Distribution and Depolarization Properties of Aerosol Particles over the Northwest Pacific and Arctic Ocean from Shipborne Measurements during an R/V Xuelong Cruise
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Size Distribution and Depolarization Properties of Aerosol Particles over the Northwest Pacific and Arctic Ocean from Shipborne Measurements during an R/V Xuelong Cruise

机译：在R / V Xuelong Cruise期间，来自船载测量的西北太平洋和北极海洋气溶胶颗粒的尺寸分布和去极化性质

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摘要

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 (delta: 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 delta value 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 mu m. The supermicrometer particles were mostly related to sea-salt aerosols with a delta value of 0.09 over marine polar areas, similar to 22% larger than in the low-latitude region because of differences in chemical composition and dry air conditions. The delta values for fine particles (1 mu m) 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.
机译：极地地区的大气气溶胶吸引了对气候变化的关键影响的相当大的关注。在该研究中，在西北太平洋和北极海洋中研究了基于单颗粒的去极化比（Delta：S偏振分量除以总向后散射强度）的颞型变化。使用光学粒子计数器与去极化模块进行光学粒子计数器。整个观察期的δ值为0.06 +/- 0.01，比沿海日本的观察结果低0.06 +/- 0.01（0.12 +/- 0.02）（Pan等人.Chemos。Mecha。2016年， 16,9863-9873）和中海（0.19 +/- 0.02）（Tian等人.Chemos。Chem。夏季，2018年，18,18203-18217）。体积浓度显示在0.9和2μm的两种主导尺寸模式。超级计颗粒大多数与海洋极地区域的δ值为0.09的海盐气溶胶，同样比低纬度区域大的22％，因为化学成分和干燥空气条件差异。细颗粒（<1μm）的δ值为0.05 +/- 0.1,50％，低于内陆人为污染物，主要是因为潜力计海盐的复杂混合物。北冰洋中的高颗粒浓度主要归因于与深海旋风区相关的海盐强烈海洋排放，而来自大陆的远程运输污染物是西北太平洋地区高颗粒浓度的主要原因。

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  • 来源
    《Environmental Science & Technology》 |2019年第14期|7984-7995|共12页
  • 作者

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

  • 作者单位

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China;

    Minist Nat Resources Inst Oceanog 3 Xiamen 361005 Fujian Peoples R China;

    Minist Nat Resources Inst Oceanog 3 Xiamen 361005 Fujian Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China;

    Jinan Univ Inst Mass Spectrometer & Atmospher Environm Guangzhou 510632 Guangdong Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China;

    Kyushu Univ Res Inst Appl Mech Kasuga Fukuoka 8168580 Japan;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Kyushu Univ Res Inst Appl Mech Kasuga Fukuoka 8168580 Japan;

    Tianjin Univ Inst Surface Earth Syst Sci Tianjin 300072 Peoples R China;

    Chinese Acad Sci Inst Atmospher Phys State Key Lab Atmospher Boundary Layer Phys & Atm Beijing 100029 Peoples R China|Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China|Chinese Acad Sci Ctr Excellence Reg Atmospher Environm Xiamen 361021 Fujian Peoples R China;

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