降水對江浙滬PM<sub>2.5</sub>的清除效率研究

doi:10.3969/2018jms.0028

首頁 > 過刊瀏覽>2019年第39卷第2期 >178-186. DOI:10.3969/2018jms.0028

降水對江浙滬PM2.5的清除效率研究
DOI:
                        10.3969/2018jms.0028
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:X513
基金項目:國家自然科學(xué)基金資助項目（91744206；41611540340）；國家科技支撐項目（2014BAC22B04）

Analysis on scavenging effect of precipitation on PM_2.5 in Jiangsu, Zhejiang and Shanghai area

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:

為了解不同程度的降水對江浙滬地區(qū)大氣PM_2.5的清除作用，搜集了2014-2016年該地區(qū)41個城市的降水和PM_2.5觀測數(shù)據(jù)，通過對比2 a非降水和全時段PM_2.5平均濃度的差異，發(fā)現(xiàn)前者顯著高于后者，說明降水對該地區(qū)PM_2.5具有清除作用。利用降水前與降水期間PM_2.5的濃度差異作為降水對PM_2.5的清除率，降水后與降水期間的濃度差異作為雨后濃度回升的增加率，分別研究了目標區(qū)域不同時期、不同降雨量以及不同降雨時長對PM_2.5的清除效果。結(jié)果顯示：（1）與江浙滬南部地區(qū)不同的是，北部地區(qū)降水清除率與降水前濃度存在正相關(guān)，降水后濃度的增加與當?shù)氐呐欧帕砍收嚓P(guān)。（2）當降水量為30 mm或者降水時長為36 h時，清除率增幅減緩，說明降水對PM_2.5的清除效率存在著閾值。

Abstract:

To understand the scavenging effect of precipitation on PM_2.5 in Jiangsu-Zhejiang-Shanghai area, the precipitation and PM_2.5 observation data from 2014 to 2016 in 41 cities were analyzed. By comparing with the average concentrations of PM_2.5 between non-precipitation and full-time in two years, it is found that the former was significantly higher than the latter, showing that precipitation has a scavenging effect on PM_2.5 in this area. The ratio of PM_2.5 concentration before and after precipitation was used as the scavenging rate, while the ratio of concentration after precipitation and precipitation was used as the increasing rate. We studied the scavenging efficiencies of PM_2.5 at different periods, precipitations and precipitation durations in the target area. The results show that:(1) there is a positive correlation between scavenging ratio and pre-precipitation concentration of PM_2.5 in the northern part of Jiangsu-Zhejiang-Shanghai area, and the concentration of after precipitation are positively correlated with local emissions, which are different from the southern part of Jiangsu-Zhejiang-Shanghai area. (2) When the precipitation is 30 mm or the duration of precipitation is 36 h, the increase rate of the scavenging slows down, indicating that there is a threshold value for the PM_2.5 scavenging efficiency by precipitation.

參考文獻

相似文獻

引證文獻

引用本文

范凡,陸爾,葛寶珠,王自發(fā).降水對江浙滬PM_2.5的清除效率研究.氣象科學(xué),2019,39(2):178-186 FAN Fan, LU Er, GE Baozhu, WANG Zifa. Analysis on scavenging effect of precipitation on PM_2.5 in Jiangsu, Zhejiang and Shanghai area. Journal of the Meteorological Sciences,2019,39(2):178-186

復(fù)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:2017-11-10
最后修改日期:2018-02-09
錄用日期:
在線發(fā)布日期: 2019-06-01
出版日期:

文章二維碼

您是第位訪問者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

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(guān)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(guān)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