Lidar measurement of backscatter and attenuation of atmospheric aerosol

Hamilton, P.M.

doi:10.1016/0004-6981(69)90010-9

Cited by 41 publications

(14 citation statements)

References 2 publications

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“…In urban areas, Klett solution (Klett, 1981) of the vertical extinction profile can be highly erroneous because of the relatively large uncertainty of the extinction-to-backscatter ratio (so-called LIDAR ratio). The multiangle method (Kano, 1968;Hamilton, 1969;Filipčič et al, 2003) is a possible way to obtain vertical extinction profiles from different elevation angle data obtained by scanning LIDAR under the assumption of horizontal atmospheric…”

Section: Analysis Of Lidar Datamentioning

confidence: 99%

Tracking of urban aerosols using combined LIDAR-based remote sensing and ground-based measurements

Stanič

Gao

et al. 2012

Atmos. Meas. Tech.

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Abstract.A measuring campaign was performed over the neighboring towns of Nova Gorica in Slovenia and Gorizia in Italy on 24 and 25 May 2010, to investigate the concentration and distribution of urban aerosols. Tracking of two-dimensional spatial and temporal aerosol distributions was performed using scanning elastic LIDAR, operating at 1064 nm. In addition, PM 10 concentrations of particles, NO x concentrations and meteorological data were continuously monitored within the LIDAR scanning region. Based on the data we collected, we investigated the flow dynamics and the aerosol concentrations within the lower troposphere and found an evidence for daily aerosol cycles. We observed a number of cases with spatially localized increased LIDAR returns, which are associated with the presence of point sources of particulate matter. Daily aerosol concentration cycles were also clearly visible with a peak in aerosol concentration during the morning rush hours and daily plateau at around 17:00 Central European Time. We also found that horizontal atmospheric extinction at the height of 200 m, averaged in limited region with a radius of 300 m directly above the ground-based measuring site, was linearly correlated to the PM 10 concentration with a correlation coefficient of 0.84. When considering the average of the horizontal atmospheric extinction over the entire scanning region, a strong dependence on traffic conditions (concentration of NO x ) in the vicinity of the ground-based measuring site was observed.

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Section: Analysis Of Lidar Datamentioning

confidence: 99%

Tracking of urban aerosols using combined LIDAR-based remote sensing and ground-based measurements

Stanič

Gao

et al. 2012

Atmos. Meas. Tech.

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“…(1) subtraction of background signal (2) range-squared correction (3) transmittance correction (4) power normalization (5) calibration of system efficiency Finally, the volume backscattering coefficient * (R) is calculated as The transmittance is calculated using extinction coefficients estimated by the slant path method (Hamilton, 1968) for RHI data and by the slope method (Viezee et al, 1969;Murray et al, 1978) for PPI data. In the present study, since the aerosol concentration is just treated as tracers of atmospheric structures, no exact calibration is carried out for system efficiency.…”

Section: Principle Of Lidar and Its Basic Equationmentioning

confidence: 99%

Observational Study on the Atmospheric Mixed Layer and Transition Layer Structures Using a Mie Lidar

Sasano

1985

Journal of the Meteorological Society of Japan

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“…Scanning mode is a special working condition for LiDAR systems [15][16][17]. It can provide atmospheric information in the profile with a fixed angle, as well as two-dimensional (2D) spatial scans (range-height-indicator (RHI) scan or plane-position-indicator scan), which give LiDAR remote sensing the capability to map atmospheric parameters [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…It can provide atmospheric information in the profile with a fixed angle, as well as two-dimensional (2D) spatial scans (range-height-indicator (RHI) scan or plane-position-indicator scan), which give LiDAR remote sensing the capability to map atmospheric parameters [18,19]. For the application of scanning elastic backscatter LiDAR, the multiangle method is investigated to retrieve the vertical profile of atmospheric optical properties without the assumption of a relationship between extinction and backscatter coefficients [15,20]. The critical requirement in the multiangle method is the horizontally homogeneous particle backscatter and extinction coefficients at all measurement heights, which are often not fulfilled.…”

Section: Introductionmentioning

confidence: 99%

Application of the Ultraviolet Scanning Elastic Backscatter LiDAR for the Investigation of Aerosol Variability

et al. 2015

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In order to investigate the aerosol variability over the southwest region of Slovenia, an ultraviolet scanning elastic backscatter LiDAR was utilized to make the vertical scan for atmospheric probing. With the assumption of horizontal atmospheric homogeneity, aerosol optical variables were retrieved from the horizontal pixel data points of two-dimensional range-height-indicator (RHI) diagrams by using a multiangle retrieval method, in which optical depth is defined as the slope of the resulting linear function when height is kept constant. To make the data retrieval feasible and precise, a series of key procedures complemented the data processing, including construction of the RHI diagram, correction of Rayleigh scattering, assessment of horizontal atmospheric homogeneity and retrieval of aerosol optical variables. The measurement example demonstrated the feasibility of the ultraviolet scanning elastic backscatter LiDAR in the applications of the retrieval of aerosol extinction and determination of the atmospheric boundary layer height. Three months' data combined with the modeling of air flow trajectories using Hybrid Single Particle Lagrangian Integrated Trajectory Model were analyzed to investigate aerosol variability. The average value of aerosol extinction with the presence of land-based air masses from the European continent was found to be two-times larger than that influenced by marine aerosols from the Mediterranean or Adriatic Sea.Remote Sens. 2015, 7 6321

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Lidar measurement of backscatter and attenuation of atmospheric aerosol

Cited by 41 publications

References 2 publications

Tracking of urban aerosols using combined LIDAR-based remote sensing and ground-based measurements

Tracking of urban aerosols using combined LIDAR-based remote sensing and ground-based measurements

Observational Study on the Atmospheric Mixed Layer and Transition Layer Structures Using a Mie Lidar

Application of the Ultraviolet Scanning Elastic Backscatter LiDAR for the Investigation of Aerosol Variability

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