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Characteristics of CCN concentration and their effect on microphysical properties of clouds over the neighborhood of the East China Sea

东海邻海CCN浓度特征及其对云微物理性质的影响

基本信息

批准号：
17510006
负责人：
ISHIZAKI Yutaka
金额：
$ 2.37万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17510006/
关键词：
cloud condensation nuclei air pollutant cloud droplet cloud physics microstructure of lower clouds optical effective radius of cloud droplets satellite MODIS 下層雲東シナ海雲の微物理学的性質雲の光学的性質黄砂 MODIS

项目摘要

(1) Effects of continentally polluted air mass on aerosol optical properties over the East China Sea were studied by using data of aerosol size and number and RH observed by our past aircraft observation and aerosol composition observed on ground observation. The study pointed out that air pollutants originated from China, Korea and Japan sometimes strongly pollute the atmosphere over the East China Sea.(2) Formation process of new cloud condensation nuclei (CCN) in clouds was examined by analyzing our past aircraft observation data in detail. It was strongly suggested that new CCN are formed by sulfate (SO_4^2-) particles transformed from sulfur dioxide (SO_2) in clouds.(3) The time variation of CCN concentration in addition to aerosol particles, black carbon and gases of SO_2, NOx and O_3 concentrations was observed at the northern end of Amami-Oshima Island from 16 October 2005 through 30 January 2006. These wind rose figures showed that CCN concentration drastically increases with increasing aerosol particles, black carbon or gases of SO_2, and NOx concentrations under the wind directions from China, Korea and Japan, These results strongly suggest that air pollutants originated from China, Korea and Japan remarkably pollute the atmosphere over the East China Sea and significantly increase CCN concentration over the East China Sea.(4) The effect of CCN on microphysical properties of lower clouds was analyzed by comparing CCN concentration with SO_4^2- distribution obtained by Chemical weather FORecasting System and optical effective radius of cloud droplets and optical thickness of cloudy sky estimated by satellite MODIS data The results strongly suggested that high CCN concentration decrease optical effective radius of cloud droplets and increase optical thickness of cloudy sky over the East China Sea.

(1)利用以往飞机观测的气溶胶大小、数量、相对湿度和地面观测的气溶胶成分资料，研究了大陆污染气团对东海气溶胶光学特性的影响。该研究指出，来自中国、韩国和日本的空气污染物有时会严重污染东海上空的大气。(2)详细分析了云中新的云凝结核（CCN）的形成过程。新的CCN是由云层中二氧化硫（SO_2）转化而来的硫酸盐（SO_4^2-）颗粒形成的。(3) 2005年10月16日至2006年1月30日，在天美大岛北端观测了除气溶胶粒子外CCN浓度、黑碳浓度和SO_2、NOx和O_3气体浓度的时间变化。风玫瑰图显示，在中国、韩国和日本风向下，随着气溶胶颗粒、黑碳或SO_2气体和NOx浓度的增加，CCN浓度急剧增加，这强烈表明，来自中国、韩国和日本的大气污染物显著污染了东海上空的大气，显著增加了东海上空的CCN浓度。(4)通过对比CCN浓度与化学天气预报系统获得的SO_4^2-分布和卫星MODIS资料估算的云滴光学有效半径和多云天空光学厚度，分析CCN对低层云微物理性质的影响。结果强烈表明，高CCN浓度降低了云滴光学有效半径，增加了多云天空光学厚度。

项目成果

期刊论文数量（20）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Observations of sulfur dioxide uptake and new particle formation in a midlatitude cumulus cloud.

中纬度积云中二氧化硫吸收和新粒子形成的观测。

DOI：
发表时间：
2006
期刊：
Atmos. Chem. Phys. Discuss. 6
影响因子：
0
作者：
Peter;J. R.;S. T. Siems;J. B. Jensen;J. L. Gras;Y. Ishizaka;J. Hacker
通讯作者：
J. Hacker

Vertical distribution of CCN concentration and their effect on microphysical properties of clouds over the sea near the Southwest Islands area in Japan

日本西南诸岛海域CCN浓度垂直分布及其对云微物理特性的影响

DOI：
发表时间：
2005
期刊：
Jour. Geophys, Res. 110 D10203, doi : 10.1029/2004JD
影响因子：
0
作者：
Adhikari M.;Y. Ishizaka;H. Minda;R. Kazaoka;J. B. Jensen
通讯作者：
J. B. Jensen

Observations of sulfur dioxide uptake and new particle formation in a midlatitude cumulus cloud

中纬度积云中二氧化硫吸收和新粒子形成的观测

DOI：
发表时间：
2006
期刊：
Atmos.Chem.Phys.Discuss 6
影响因子：
0
作者：
Peter;J.R.;S.T.Siems;J.B.Jensen;et. al.
通讯作者：
et. al.

Aircraft masurements of cloud 026653, 2006 droplet spectral dispersion and implications for indirect aerosol radiative forcing.

云的飞机测量 026653，2006 年液滴光谱色散及其对间接气溶胶辐射强迫的影响。

DOI：
发表时间：
期刊：
Geophys. Res. Letters 33 L16809, doi : 10.1029/2006GL
影响因子：
0
作者：
Zhao;C.;X. Tie;G Brasseur;K. J. Noone;T. Nakajima;Q. Zhang;R.;Zhang;M.Huang;Y. Duan;G. Li;Y. Ishizaka
通讯作者：
Y. Ishizaka

Prediction and observation of cloud processing of the aerosol size distribution by a band of cumulus

积云带气溶胶粒径分布云处理的预测与观测