Effect of Vertical Wind Shear on PM2.5 Changes over a Receptor Region in Central China

环境科学 污染物 大气科学 风切变 风向 风速 天气研究与预报模式 盛行風 污染 空气污染 航程(航空) 气候学 气象学 地质学 地理 化学 材料科学 复合材料 有机化学 生态学 生物
作者
Xiaoyun Sun,Yue Zhou,Tianliang Zhao,Yongqing Bai,Tao Huo,Liang Leng,Huan He,Jing Sun
出处
期刊:Remote Sensing [MDPI AG]
卷期号:14 (14): 3333-3333 被引量:14
标识
DOI:10.3390/rs14143333
摘要

Vertical wind shear (VWS) significantly impacts the vertical mixing of air pollutants and leads to changes in near-surface air pollutants. We focused on Changsha (CS) and Jingmen (JM), the upstream and downstream urban sites of a receptor region in central China, to explore the impact of VWS on surface PM2.5 changes using 5-year wintertime observations and simulations from 2016–2020. The surface PM2.5 concentration was lower in CS with higher anthropogenic PM2.5 emissions than in JM, and the correlation between wind speed and PM2.5 was negative for clean conditions and positive for polluted conditions in both two sites. The difference in the correlation pattern of surface PM2.5 and VWS between CS and JM might be due to the different influences of regional PM2.5 transport and boundary layer dynamics. In downstream CS, the weak wind and VWS in the height of 1–2 km stabilized the ABL under polluted conditions, and strong northerly wind accompanied by enhanced VWS above 2 km favored the long-range transport of air pollutants. In upstream JM, local circulation and long-range PM2.5 transport co-determined the positive correlation between VWS and PM2.5 concentrations. Prevailed northerly wind disrupted the local circulation and enhanced the surface PM2.5 concentrations under polluted conditions, which tend to be an indicator of regional transport of air pollutants. The potential contribution source maps calculated from WRF-FLEXPART simulations also confirmed the more significant contribution of regional PM2.5 transport to the PM2.5 pollution in upstream region JM. By comparing the vertical profiles of meteorological parameters for typical transport- and local-type pollution days, the northerly wind prevailed throughout the ABL with stronger wind speed and VWS in transport-type pollution days, favoring the vertical mixing of transported air pollutants, in sharp contrast to the weak wind conditions in local-type pollution days. This study provided the evidence that PM2.5 pollution in the Twain-Hu Basin was affected by long-distance transport with different features at upstream and downstream sites, improving the understanding of the air pollutant source–receptor relationship in air quality changes with regional transport of air pollutants.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
大模型应助纯真以晴采纳,获得200
刚刚
Orange应助粥粥sqk采纳,获得10
刚刚
1秒前
小啵完成签到,获得积分10
1秒前
2秒前
111完成签到 ,获得积分10
5秒前
嫁个养熊猫的完成签到 ,获得积分10
5秒前
神勇从波发布了新的文献求助10
6秒前
小李发布了新的文献求助10
7秒前
玫瑰枪杀案_完成签到,获得积分10
8秒前
虫虫完成签到,获得积分10
9秒前
包采梦完成签到,获得积分10
9秒前
10秒前
aaaaazhou完成签到,获得积分10
12秒前
小李完成签到,获得积分20
14秒前
yg发布了新的文献求助10
14秒前
猩猩星完成签到,获得积分10
15秒前
16秒前
18秒前
兔子发布了新的文献求助10
20秒前
张翰文完成签到,获得积分20
20秒前
22秒前
隐形曼青应助顺利乐枫采纳,获得10
22秒前
24秒前
YEFEIeee完成签到 ,获得积分10
24秒前
25秒前
dochx完成签到,获得积分10
25秒前
赵焱峥完成签到,获得积分10
26秒前
兔子完成签到,获得积分10
26秒前
lisa发布了新的文献求助10
28秒前
29秒前
默默新儿完成签到 ,获得积分10
29秒前
悠然xz关注了科研通微信公众号
29秒前
aaaaazhou发布了新的文献求助10
29秒前
洁白的故人完成签到 ,获得积分10
31秒前
31秒前
打打应助DNA采纳,获得30
31秒前
Phosphene应助helitrope采纳,获得10
32秒前
单纯大侠发布了新的文献求助10
33秒前
专注的夜蓉完成签到,获得积分10
33秒前
高分求助中
Sustainability in ’Tides Chemistry 2000
Studien zur Ideengeschichte der Gesetzgebung 1000
TM 5-855-1(Fundamentals of protective design for conventional weapons) 1000
Threaded Harmony: A Sustainable Approach to Fashion 810
Handbook of the Mammals of the World – Volume 3: Primates 805
Ethnicities: Media, Health, and Coping 800
Gerard de Lairesse : an artist between stage and studio 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3074227
求助须知:如何正确求助?哪些是违规求助? 2727639
关于积分的说明 7499897
捐赠科研通 2375736
什么是DOI,文献DOI怎么找? 1259523
科研通“疑难数据库(出版商)”最低求助积分说明 610724
版权声明 597081