Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2017.01.001 |
Characteristics of absorbing aerosols during winter foggy period over the National Capital Region of Delhi: Impact of planetary boundary layer dynamics and solar radiation flux | |
Tyagi, S.1,7; Tiwari, S.2; Mishra, A.1; Singh, S.3; Hopke, Philip K.4; Singh, Surender5; Attri, S. D.6 | |
2017-05-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2017 |
卷号 | 188页码:43475 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA |
英文摘要 | Severe air pollution in the northern India coupled with the formation of secondary pollutants results in severe fog conditions during the winter. Black carbon (BC) and particulate matter (PM2.5) play a vital role within the planetary boundary layer (PBL) to degrade atmospheric visibility. These species were continuously monitored during the winter of 2014 in the National Capital Region (NCR) of Delhi. The average BC concentration was 8.0 +/- 3.1 mu g/m(3) with the January mean (11.1 +/- 5.4 mu g/m(3)) approximately two times higher than February (5.9 +/- 2.1 mu g/m(3)). The average PM2.5 concentration was 137 +/- 67 mu g/m(3) with monthly area-average maximum and minima in December and February, respectively. Higher concentrations of BC at 10:00 local standard time LST (8.5 mu g/m(3)) and 22:00 LST (9.7 mu g/m(3)) were consistently observed and assigned to morning and evening rush-hour traffic across Delhi. Daily average solar fluxes, varied between 17.9 and 220.7 W/m(2) and had a negative correlation (r = -0.5) with BC during fog episodes. Ventilation coefficient (VC) reduced from 'no fog' to fog phase over Palam Airport (PLM) (0.49) times and Hindon Airport (HND) (0.28) times and from fog to prolonged fog (>14 h) phase over PLM (0.35) times and HND (0.41) times, respectively, indicating high pollution over the NCR of Delhi. Ground measurements showed that daily mean aerosol optical depth at 500 nm (AOD(500)) varied between 0.32 and 1.18 with mean AOD(500) nm being highest during the prolonged fog (>14 h) episodes (0.98 +/- 0.08) consistent with variations in PM2.5 and BC. Angstrom exponent (alpha) and Angstrom turbidity coefficient (beta) were found to be >1 and 0.2, respectively, during fog showing the dominance of fine mode particles in the atmosphere. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Black carbon Planetary boundary layer Solar radiation flux Ventilation coefficient Aerosol optical depth Angstrom exponent |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395609200001 |
WOS关键词 | BLACK CARBON AEROSOLS ; MEGA-CITY DELHI ; SOOT PARTICLES ; URBAN AREA ; INDIA ; CHINA ; VARIABILITY ; ABSORPTION ; VISIBILITY ; TRANSPORT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/38450 |
专题 | 地球科学 |
作者单位 | 1.Gautham Buddha Univ, Sch Vocat Studies & Appl Sci, Dept Environm Sci, Noida 201312, Uttar Pradesh, India; 2.Indian Inst Trop Meteorol, New Delhi 110060, India; 3.CSIR, Natl Phys Lab, New Delhi, India; 4.Clarkson Univ, Box 5708, Potsdam, NY 13699 USA; 5.Haryana Agr Univ, CCS, Hisar 125004, Haryana, India; 6.Indian Meteorol Dept, Lodi Rd, New Delhi 110003, India; 7.Gautam Buddha Univ, Sch Vocat Studies & Appl Sci, Dept Environm Sci, Noida 201303, Uttar Pradesh, India |
推荐引用方式 GB/T 7714 | Tyagi, S.,Tiwari, S.,Mishra, A.,et al. Characteristics of absorbing aerosols during winter foggy period over the National Capital Region of Delhi: Impact of planetary boundary layer dynamics and solar radiation flux[J]. ATMOSPHERIC RESEARCH,2017,188:43475. |
APA | Tyagi, S..,Tiwari, S..,Mishra, A..,Singh, S..,Hopke, Philip K..,...&Attri, S. D..(2017).Characteristics of absorbing aerosols during winter foggy period over the National Capital Region of Delhi: Impact of planetary boundary layer dynamics and solar radiation flux.ATMOSPHERIC RESEARCH,188,43475. |
MLA | Tyagi, S.,et al."Characteristics of absorbing aerosols during winter foggy period over the National Capital Region of Delhi: Impact of planetary boundary layer dynamics and solar radiation flux".ATMOSPHERIC RESEARCH 188(2017):43475. |
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