南京一次重霾天氣納米氣溶膠觀測研究

doi:10.12306/2019jms.0050

首頁 > 過刊瀏覽>2021年第41卷第2期 >237-244. DOI:10.12306/2019jms.0050

南京一次重霾天氣納米氣溶膠觀測研究
DOI:
                        10.12306/2019jms.0050
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:P401
基金項目:國家重點研發(fā)計劃重點專項(2018YFC1507905);國家自然科學基金資助項目(41775134);江蘇省研究生科研創(chuàng)新計劃(SJKY19_0963)

An observational study of nano-scale aerosol during a heavy haze in Nanjing

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計

參考文獻

相似文獻

引證文獻

資源附件

文章評論

摘要:

為加深對南京地區(qū)重霾天氣過程納米尺度氣溶膠物理特征的了解,對2017年12月21—25日的一次重霾天氣過程進行了綜合探測,利用寬范圍粒徑譜儀觀測了此次過程中10~1 000 nm顆粒物數(shù)濃度,并結合能見度等氣象要素,對重霾期間納米氣溶膠譜分布進行了分析。結果表明:此次霾重污染過程出現(xiàn)在低溫、高濕、氣壓上升期間;與非重污染時期相比,重污染期間N_10-20與N_20-100降低,N_100-1000升高;重污染期間氣溶膠粒子平均數(shù)濃度為17 035個/cm³,低于非重污染期間粒子數(shù)濃度,N_100-1000占總數(shù)濃度的55.05%;重霾發(fā)生期間納米氣溶膠數(shù)濃度譜為單峰結構,峰值在100 nm附近,隨著污染加重,納米氣溶膠峰值粒徑向大粒徑偏移,粒子向大粒徑段集中;不同溫度對不同粒徑粒子數(shù)濃度的影響不同,20~100 nm粒徑段氣溶膠與數(shù)濃度與溫度呈反相關性,100~500 nm粒子數(shù)濃度與溫度呈正相關性.

Abstract:

In order to deepen the understanding of physical characteristics of nano-scale aerosol in heavy haze weather process in Nanjing, a heavy haze process during 21-25 December 2017 was selected to detect comprehensively. Based on the aerosol number concentration data those particles are between 10-1000 nmfrom wide range of particle size spectrometer, and combined with meteorological elements, such as visibility, the nano-scale aerosol spectral distribution was analyzed. Results show that the heavy haze pollution occur during the period of low temperature, high humidity and rising air pressure. Compared with non-heavy pollution period, N_10-20 and N_20-100 decrease while N_100-1000 increases in heavy haze period. During heavy pollution, the average concentration of aerosol particles is 17035 in per cubic meter, lower than that during non-heavy pollution. N_100-1000 accounts for 55.05% of the total concentration during heavy pollution.During the occurrence of heavy haze, the nanometre aerosol number concentration spectrum has a single-peak structure, and the peak value is around 100 nm. With the increasing of pollution, the peak particle size of nanometre aerosol is shifted to large particle size, and the particles are concentrated in the large particle size segment.The influence of different temperature on particle number concentration of different particle size is different.The particle number concentration of 20-100 nm is inversely correlated with temperature, while the particle number concentration of 100-500 nm is positively correlated with temperature.

參考文獻

相似文獻

引證文獻

引用本文

孫瑋,牛生杰,王天舒,王元,李遙,張璐瑤.南京一次重霾天氣納米氣溶膠觀測研究.氣象科學,2021,41(2):237-244 SUN Wei, NIU Shengjie, WANG Tianshu, WANG Yuan, LI Yao, ZHANG Luyao. An observational study of nano-scale aerosol during a heavy haze in Nanjing. Journal of the Meteorological Sciences,2021,41(2):237-244

復制

文章指標

點擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2019-08-13
最后修改日期:2019-10-12
錄用日期:
在線發(fā)布日期: 2021-05-14
出版日期:

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關視頻

文章指標

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關視頻

文章指標

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说