Enrichment of submicron sea-salt-containing particles in small cloud droplets based on single-particle mass spectrometry
Enrichment of submicron sea-salt-containing particles in small cloud droplets based on single-particle mass spectrometry
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基于单粒子质谱法富集小云滴中亚微米海盐颗粒
DOI：
10.5194/acp-19-10469-2019
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发表时间：
2019-08
影响因子：
6.3
通讯作者：
Sheng Guoying
中科院分区：
文献类型：
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作者：
Lin Qinhao;Yang Yuxiang;Fu Yuzhen;Zhang Guohua;Jiang Feng;Peng Long;Lian Xiufeng;Liu Fengxian;Bi Xinhui;Li Lei;Chen Duohong;Li Mei;Ou Jie;Tang Mingjin;Wang Xinming;Peng Pingan;Sheng Guoying
含海盐粒子的化学成分和大小对其云凝结核（CCN）活动的影响还不完全清楚。利用地面对流虚拟撞击器（GCVI）和单粒子气溶胶质谱仪（SPAMS）对南岭亚微米（干直径0.2-1.0 μm）和超微米（1.0-2.0 μm）海盐云残留物（干云滴）的化学组成进行了研究。在GCVI系统中设置了七种云滴切割尺寸（7.5-14 µm）。在7.5 µm的切割尺寸下观察到含海盐颗粒的最高数量分数（26%，按数量计），其次是14 µm（17%）和其他切割尺寸（3%-5%）。含海盐的亚微米云残留物在7.5 µm的切割尺寸下约占20%（按数量计），这明显高于8-14 µm切割尺寸下的百分比（低于2%）。这种差异可能与化学成分的变化有关。在7.5 µm的切割尺寸下，硝酸盐与超过90%的亚微米含海盐云残留物内部混合，高于硫酸盐（20%），铵（低于1%），胺（6%），烃类有机物质（2%）和有机酸（4%）。然而，在8-14 µm的切割尺寸下，硝酸盐、硫酸盐、铵、胺、烃有机物质和有机酸与> 90%、> 80%、39%-84%、71%-86%、52%-90%和32%-77%的亚微米含海盐云残留物内部混合。海盐粒子在超微米云残留物中的比例一般随着切割尺寸的增加而增加，它们的云凝结核活性受化学成分的影响较小。这项研究为全面了解海盐CCN活动提供了重要贡献。
The effects of the chemical composition and size of sea-salt-containing particles on their cloud condensation nuclei (CCN) activity are incompletely understood. We used a ground-based counterflow virtual impactor (GCVI) coupled with a single-particle aerosol mass spectrometer (SPAMS) to characterize chemical composition of submicron (dry diameter of 0.2–1.0 µm) and supermicron (1.0–2.0 µm) sea-salt-containing cloud residues (dried cloud droplets) at Mount Nanling, southern China. Seven cut sizes (7.5–14 µm) of cloud droplets were set in the GCVI system. The highest number fraction of sea-salt-containing particles was observed at the cut size of 7.5 µm (26 %, by number), followed by 14 µm (17 %) and the other cut sizes (3 %–5 %). The submicron sea-salt-containing cloud residues contributed approximately 20 % (by number) at the cut size of 7.5 µm, which was significantly higher than the percentages at the cut sizes of 8–14 µm (below 2 %). This difference was likely involved in the change in the chemical composition. At the cut size of 7.5 µm, nitrate was internally mixed with over 90 % of the submicron sea-salt-containing cloud residues, which was higher than sulfate (20 %), ammonium (below 1 %), amines (6 %), hydrocarbon organic species (2 %), and organic acids (4 %). However, at the cut sizes of 8–14 µm, nitrate, sulfate, ammonium, amines, hydrocarbon organic species, and organic acids were internally mixed with > 90 %, > 80 %, 39 %–84 %, 71 %–86 %, 52 %–90 %, and 32 %–77 % of the submicron sea-salt-containing cloud residues. The proportion of sea-salt-containing particles in the supermicron cloud residues generally increased as a function of cut size, and their CCN activity was less influenced by chemical composition. This study provided a significant contribution towards a comprehensive understanding of sea-salt CCN activity.
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影响因子：
3.8
作者：
Taylor J. Shingler;S. Dey;A. Sorooshian;F. Brechtel;Zhen Wang;A. Metcalf;M. Coggon;J. Mülmenstädt-J.-Mülmen
通讯作者：
Taylor J. Shingler;S. Dey;A. Sorooshian;F. Brechtel;Zhen Wang;A. Metcalf;M. Coggon;J. Mülmenstädt-J.-Mülmen
影响因子：
3.1
作者：
T. Nakajima;Kentaroh Suzuki;G. Stephens
通讯作者：
T. Nakajima;Kentaroh Suzuki;G. Stephens
影响因子：
7.4
作者：
A. Zelenyuk;D. Imre;M. Earle;R. Easter;A. Korolev;R. Leaitch;Peter S. K. Liu;A. Macdonald;M. Ovchinnikov;W. Strapp
通讯作者：
A. Zelenyuk;D. Imre;M. Earle;R. Easter;A. Korolev;R. Leaitch;Peter S. K. Liu;A. Macdonald;M. Ovchinnikov;W. Strapp
影响因子：
--
作者：
S. Gong;L. Barrie;M. Lazare
通讯作者：
S. Gong;L. Barrie;M. Lazare
影响因子：
5
作者：
J. Monger;J. Collett;B. Daube;M. Hoffmann
通讯作者：
J. Monger;J. Collett;B. Daube;M. Hoffmann