Reply on RC1 DOI Creative Commons

Chen-Wei Liang

Published: Dec. 22, 2023

Abstract. In this study, an unmanned aerial vehicle (UAV) platform with sensing and sampling systems was developed for three-dimensional (3D) measurements of air pollutant concentrations. The system contains multiple microsensors Internet Things devices determining the 3D distributions four critical pollutants two meteorological parameters in real time. Moreover, comprises remote-controllable gas kits, each which a Tedlar bag 1 L measurement volatile organic compound concentrations according to TO-15 method US Environmental Protection Agency. performance UAV verified experiments where it used detect emissions from large industrial zone Taiwan that included traditional park, precision machinery municipal waste incineration plant. Three locations were selected as field sites prevailing local wind direction. vertical pollutants, ambient temperature, relative humidity determined data gathered at aforementioned March May 2023. A total 56 72 chemical species qualitatively quantitatively analyzed these periods, respectively. experimental results feasibility using proposed accurately evaluating concentration distribution transport zone. can be part Method To-15, thus extending measure VOCs area. serve useful tool management decision-making process pollution areas.

Language: Английский

Vertical profiles of O3, NO2 and PM in a major fine chemical industry park in the Yangtze River Delta of China detected by a sensor package on an unmanned aerial vehicle DOI
Lang Chen, Xiaobing Pang, Jingjing Li

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 845, P. 157113 - 157113

Published: July 1, 2022

Language: Английский

Citations

30

Multi-perspective Investigations of Aerosol’s Non-linear Impact on Unmanned Aerial Vehicle for Air Pollution Control Applications Under Various Aerosol Working Environments DOI
Gopinath Vinayagam,

Ragavendra Thaiyan Rajendran,

Mahima Swetha Mohan

et al.

Aerosol Science and Engineering, Journal Year: 2024, Volume and Issue: 8(2), P. 213 - 240

Published: March 16, 2024

Language: Английский

Citations

8

Evaluating the multi-variable influence on O3, NO2, and HCHO using BRTs and RF model DOI

Junaid Khayyam,

Pinhua Xie,

Jin Xu

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 925, P. 171488 - 171488

Published: March 9, 2024

Language: Английский

Citations

5

Efficient air pollution mapping in extensive regions with fully autonomous unmanned aerial vehicles: A numerical perspective DOI
Murat Bakırcı

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 909, P. 168606 - 168606

Published: Nov. 17, 2023

Language: Английский

Citations

11

Characterizing urban planetary boundary layer dynamics using 3-year Doppler wind lidar measurements in a western Yangtze River Delta city, China DOI Creative Commons
Tianwen Wei, Mengya Wang,

Kenan Wu

et al.

Atmospheric measurement techniques, Journal Year: 2025, Volume and Issue: 18(8), P. 1841 - 1857

Published: April 24, 2025

Abstract. The planetary boundary layer (PBL) dynamics play a critical role in shaping urban atmospheric processes by governing the exchange of energy, momentum, and mass within lower atmosphere. This study investigates PBL Hefei, city western Yangtze River Delta (YRD), using 3 years (June 2019 to June 2022) Doppler wind lidar data. Seasonal diurnal variations key parameters, including profiles, shear intensity, turbulent mixing, low-level jets (LLJs), mixing height (MLH), are analyzed. Results show that horizontal speeds accelerate more rapidly above km with predominant westerly winds (270°±15°) all seasons. vertical depth high-wind zone (>8 m s−1) during day is found be generally deeper than at night, particularly winter. In LLJs primarily form sunset dissipate noon, typically altitudes between 0.5 0.6 throughout year, except July. LLJ occurrences most frequent spring (31.7 %), followed summer (24.7 autumn (22.3 winter (21.3 %). Summer intensified, extending up 1.5 km. larger gradient below significantly enhances turbulence intensity near ground night. seasonal average MLH peaks 14:00 15:00 UTC+8, reaching approximately 1.2 summer. Cloud cover raises about 100 night but decreases it 200 afternoon peak. provides insights into lidar-based highlights implications for local standards concerning low-altitude economic activities.

Language: Английский

Citations

0

Characterization of the vertical evolution of urban nocturnal boundary layer by UAV measurements: Insights into relations to cloud radiative effect DOI
Lin Shen,

Jiaoshi Zhang,

Yin Cheng

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 232, P. 116323 - 116323

Published: June 2, 2023

Language: Английский

Citations

5

Analysis of the air quality in upper atmospheric boundary layer in a high-density city in Asia using 3-year vertical profiles measured by the 3-Dimensional Real-Time Atmospheric Monitoring System (3DREAMS) DOI
Steve Hung Lam Yim, Tao Huang

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 857, P. 159137 - 159137

Published: Sept. 30, 2022

Language: Английский

Citations

7

Urban vertical air pollution gradient and dynamics investigated with low-cost sensors and large-eddy simulations DOI Creative Commons
Louise Bøge Frederickson, Hugo S. Russell, Siegfried Raasch

et al.

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 316, P. 120162 - 120162

Published: Oct. 18, 2023

A network of five low-cost air pollution sensor (LCS) nodes was deployed vertically on the exterior H. C. Ørsted Institute at University Copenhagen, Denmark, to investigate transport from road below. All LCS measured PM2.5, NO2, and O3 1-min time resolution, one them also noise. Traffic monitored with a webcam, where traffic type levels were derived using machine-learning algorithm. We investigated how well traffic-related pollution, noise, real-time counts serve as proxies for another. The correlations between count exhibited relatively low values when considering all data. However, these significantly increased under southwesterly wind direction speed, reaching R2 = 0.40 NO2 0.51 volume, 0.70 noise total volume. These results indicate common source, namely traffic, three parameters. spanning 25 m had extremely intervariability minimum R2-values 0.99 0.78 0.95 O3. system could not detect vertical gradient in levels. Large-Eddy Simulation model runs PALM generally supported lack observed observations. Under slightly unstable stratification, concentration remained constant height southerly winds. Conversely, winds north, west, northwest showed an increase height. For other directions, decreased by approximately 40 %–50 %, which is strong neutral attributed enhanced mixing stratification. Based measurements modeling, we conclude that profile very sensitive conditions, outside window fifth-floor office almost same ground floor.

Language: Английский

Citations

4

Inhalable Fungi and Opportunistic Pathogens During Haze and Haze‐Dust Events From Winter to Springtime in One Typical Inland City of Northern China DOI
Zhao‐Wen Wang,

Houfeng Liu,

Pengju Xu

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2024, Volume and Issue: 129(11)

Published: June 1, 2024

Abstract Fungal aerosols, as significant biocomponents of inhalable particulate matter, encompass a variety allergens and pathogens. However, comprehensive knowledge regarding their composition, sources, opportunistic pathogens present in severe air pollution remains limited. In this study, PM 2.5 samples were collected from January to March 2018 northern Chinese city, during the winter heating spring sandstorm seasons. The fungal community characteristics within three distinct haze haze‐dust composite examined. concentration aerosols was found be significantly higher dust samples. This evidenced by strong positive correlation with Ca 2+ , temperature, wind speed ( p < 0.05). Human animal pathogens, such Candida more prevalent Conversely, plant like Alternaria primary ecological function shifted being saprophytic becoming human‐animal pathogenic or plant‐animal pathogenic. shift observed non‐pollution, haze, pollution. dispersion influenced factors events meteorological conditions, including increased temperature speed. episodes, dust‐related pollutants, soil 10 accounted for 51.39% variation community. research explored dynamics communities, potential influencing communities regional insights garnered provide robust foundation subsequent human health exposure assessments.

Language: Английский

Citations

1

A long-term Doppler wind LiDAR study of heavy pollution episodes in western Yangtze River Delta region, China DOI
Mengya Wang, Tianwen Wei, Simone Lolli

et al.

Atmospheric Research, Journal Year: 2024, Volume and Issue: 310, P. 107616 - 107616

Published: Aug. 3, 2024

Language: Английский

Citations

1