scholarly journals A new method for estimating aerosol mass flux in the urban surface layer by LAS

2016 ◽  
Author(s):  
R. M. Yuan ◽  
T. Luo ◽  
J. N. Sun ◽  
H. Liu ◽  
Y. F. Fu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Layer ◽  
Mass Flux ◽  
Atmospheric Aerosol ◽  
Mass Concentration ◽  
Vertical Transport ◽  
New Method ◽  
Aerosol Mass ◽  
Aerosol Mass Concentration ◽  
Transport Flux

Abstract. Atmospheric aerosol has a great influence on human health and the natural environment as well as the weather and climate system. Therefore, atmospheric aerosol has attracted significant attention from the society as a whole. Despite consistent research efforts, there are still uncertainties in our understanding of its effects due to poor knowledge of aerosol vertical transport caused by our limited measurement capability of aerosol mass vertical transport flux. In this paper, a new method for measuring atmospheric aerosol vertical transport flux is developed based on the similarity theory of surface layer. The theoretical results show that aerosol mass flux can be linked to the real and imaginary parts of the atmospheric equivalent refractive index structure parameter (AERISP), and the ratio of aerosol mass concentration to the imaginary part of the atmospheric equivalent refractive index (AERI). The real and imaginary parts of AERISP can be measured based on the light propagation theory. The ratio of aerosol mass concentration to the imaginary part of AERI can be measured based on the measurements of aerosol mass concentration and visibility. The observational results show that aerosol vertical transport flux varies diurnally and is related to the aerosol spatial distribution. The maximum aerosol flux during the experimental period in Hefei City was 0.017 mgm−2s−1, and the mean value was 0.004 mgm−2s−1. The new method offers an effective way to study aerosol vertical transport over complex environments.

scholarly journals A new method for estimating aerosol mass flux in the urban surface layer using LAS technology

2016 ◽  
Vol 9 (4) ◽  
pp. 1925-1937 ◽  
Author(s):  
Renmin Yuan ◽  
Tao Luo ◽  
Jianning Sun ◽  
Hao Liu ◽  
Yunfei Fu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Layer ◽  
Atmospheric Aerosol ◽  
Mass Concentration ◽  
Light Propagation ◽  
Vertical Transport ◽  
New Method ◽  
Aerosol Mass ◽  
Aerosol Mass Concentration ◽  
Transport Flux

Abstract. Atmospheric aerosol greatly influences human health and the natural environment, as well as the weather and climate system. Therefore, atmospheric aerosol has attracted significant attention from society. Despite consistent research efforts, there are still uncertainties in understanding its effects due to poor knowledge about aerosol vertical transport caused by the limited measurement capabilities of aerosol mass vertical transport flux. In this paper, a new method for measuring atmospheric aerosol vertical transport flux is developed based on the similarity theory of surface layer, the theory of light propagation in a turbulent atmosphere, and the observations and studies of the atmospheric equivalent refractive index (AERI). The results show that aerosol mass flux can be linked to the real and imaginary parts of the atmospheric equivalent refractive index structure parameter (AERISP) and the ratio of aerosol mass concentration to the imaginary part of the AERI. The real and imaginary parts of the AERISP can be measured based on the light-propagation theory. The ratio of the aerosol mass concentration to the imaginary part of the AERI can be measured based on the measurements of aerosol mass concentration and visibility. The observational results show that aerosol vertical transport flux varies diurnally and is related to the aerosol spatial distribution. The maximum aerosol flux during the experimental period in Hefei City was 0.017 mg m−2 s−1, and the mean value was 0.004 mg m−2 s−1. The new method offers an effective way to study aerosol vertical transport in complex environments.

Aerosol mass concentration measurements: Recent advancements of real-time nano/micro systems

2017 ◽  
Vol 114 ◽  
pp. 42-54 ◽  
Author(s):  
U. Soysal ◽  
E. Géhin ◽  
E. Algré ◽  
B. Berthelot ◽  
G. Da ◽  
...  
Keyword(s):  
Real Time ◽  
Mass Concentration ◽  
Aerosol Mass ◽  
Aerosol Mass Concentration ◽  
Concentration Measurements ◽  
Micro Systems

scholarly journals Retrieval of Vertical Mass Concentration Distributions—Vipava Valley Case Study

2019 ◽  
Vol 11 (2) ◽  
pp. 106 ◽  
Author(s):  
Longlong Wang ◽  
Samo Stanič ◽  
Klemen Bergant ◽  
William Eichinger ◽  
Griša Močnik ◽  
...  
Keyword(s):  
Biomass Burning ◽  
Mass Concentration ◽  
Mineral Dust ◽  
Small Scale ◽  
Vertical Profiles ◽  
Total Uncertainty ◽  
Aerosol Mass ◽  
Aerosol Mass Concentration ◽  
Aerosol Types

Aerosol vertical profiles are valuable inputs for the evaluation of aerosol transport models, in order to improve the understanding of aerosol pollution ventilation processes which drive the dispersion of pollutants in mountainous regions. With the aim of providing high-accuracy vertical distributions of particle mass concentration for the study of aerosol dispersion in small-scale valleys, vertical profiles of aerosol mass concentration for aerosols from different sources (including Saharan dust and local biomass burning events) were investigated over the Vipava valley, Slovenia, a representative hot-spot for complex mixtures of different aerosol types of both anthropogenic and natural origin. The analysis was based on datasets taken between 1–30 April 2016. In-situ measurements of aerosol size, absorption, and mass concentration were combined with lidar remote sensing, where vertical profiles of aerosol concentration were retrieved. Aerosol samples were characterized by SEM-EDX, to obtain aerosol morphology and chemical composition. Two cases with expected dominant presence of different specific aerosol types (mineral dust and biomass-burning aerosols) show significantly different aerosol properties and distributions within the valley. In the mineral dust case, we observed a decrease of the elevated aerosol layer height and subsequent spreading of mineral dust within the valley, while in the biomass-burning case we observed the lifting of aerosols above the planetary boundary layer (PBL). All uncertainties of size and assumed optical properties, combined, amount to the total uncertainty of aerosol mass concentrations below 30% within the valley. We have also identified the most indicative in-situ parameters for identification of aerosol type.

Method of transferring the aerosol mass concentration standard from contact tools to airborne lidar

1996 ◽  
Author(s):  
Vitalii S. Shamanaev ◽  
Boris D. Belan ◽  
Mikhail V. Panchenko ◽  
Ioganes E. Penner
Keyword(s):  
Mass Concentration ◽  
Airborne Lidar ◽  
Aerosol Mass ◽  
Aerosol Mass Concentration
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