Application of Surface Based and Airborne Lidar Systems for Environmental Monitoring

Uthe, Edward E.

doi:10.1080/00022470.1983.10465705

Cited by 14 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Open path measurements of light extinction using passive devices such as sun photometers (Shaw, 1982;MacArthur et al, 2003) or active devices such laser photometers or lidar (Kreid 1976;Uthe 1983) have been applied in the 1970s as a replacement for visual range; observations have served to estimate aerosol light extinction or aerosol optical depth (AOD) in the atmosphere. Optical depth has been observed extensively with upward looking instruments and downward viewing from satellites since the 1970s (e.g., King et al 1999, Hoff andChristopher 2009).…”

Section: Optical Sensingmentioning

confidence: 99%

Atmospheric Aerosols: Some Highlights and Highlighters, 1950 to 2018

Hidy¹

2019

Aerosol Sci Eng

View full text Add to dashboard Cite

The science of atmospheric aerosols began more than a century ago; it has experienced major advancements after the mid-twentieth century with motivation from diverse public interests and concerns for environmental protection. At least six generations of mentored investigators have involvement in these advancements. Since the 1950s, important knowledge has emerged in the theory of the dynamics of suspended particles and advanced measurements. Important developments in the theory of atmospheric aerosols include: (a) nucleation and growth mechanisms, (b) formalization of particle dynamics in the Knudsen regimes, (c) characterization of the mechanisms for the particle-size distribution, (d) identification of chemical processes for atmospheric particle sources, and (e) model integration of particle physical and chemical processes with meteorological processes. Important advances in measurements have included: (a) semicontinuous determination of particle-size distributions, (b) new methods for sampling and analysis of mass concentration and composition, (c) methods for continuous characterization of aerosol chemical properties, and (d) development of direct sensing techniques using optical properties. Examples of breakthroughs in these areas are given in the text. Illustrations of achievements in each of the areas are included in the paper. The survey is completed with comments on the generational nature of investigator contributions to aerosol science.

show abstract

Section: Optical Sensingmentioning

confidence: 99%

Atmospheric Aerosols: Some Highlights and Highlighters, 1950 to 2018

Hidy¹

2019

Aerosol Sci Eng

View full text Add to dashboard Cite

show abstract

“…Scattering cross sections are extremely large in the optical interaction processes listed in Table I. In 1963, Fiocco and Smullin reported the first laser radar observation of the stratospheric aerosol layer using a Q-switched ruby laser, and Ligda (1963) reported the first observation of the aerosols in the troposphere. After these pioneering works, Mie scattering lidar has been developed and studied actively by many groups as a new tool for understanding atmospheric processes in connection with the transport and convection of pollutants and aerosols from both natural and man-made sources (see, e.g., Uthe, 1983). These, covering not only the lower atmosphere but also the upper atmosphere, contain particles and gases that affect the spectrum and intensity of solar radiation impinging on the earth's surface thus and change the climate.…”

Section: Mie Scattering Lidarsmentioning

confidence: 99%

“…The capability of the laser radar for observing the rise, diffusion and transport of plumes has proved helpful in verifying plume models useful for predicting environmental concentration levels (Hamilton, 1969). The SRI International Mark IX mobile system was used to trace smoke plumes at about 130 km downstream of the power plant, and the airborne system was capable of mapping smoke particle distribution over a wide area (Uthe et al, 1982 andUthe, 1983). These measurements provide a regional or global structure of the atmosphere and a dynamical mechanism of air pollution source emission, diffusion and transport characteristics over land and sea.…”

Section: Measurement Of Smoke Plumes and Diffusion Characteristicsmentioning

confidence: 99%

“…(7), while the derivation of absolute aerosol mass concentration N (g cm" 3 ) is limited because of the dispersion of aerosol backscattering cross sections due to changes in size distribution, nonsphericity and the refractive index of the aerosols. Various methods are under development to derive absolute values of mass concentration using multiple-wavelength observation to estimate mean particle size, and combine the particle size with the backscatter or extinction data, (Uthe, 1983).…”

Section: Observations Of Aerosol Distribution and Boundary Layer Strumentioning

confidence: 99%

See 1 more Smart Citation

Techniques for laser remote sensing of the environment

Kobayashi¹

1987

Remote Sensing Reviews

View full text Add to dashboard Cite

show abstract

“…The use of airborne lidar to determine lowertropospheric aerosol distributions is well established (Uthe 1983;McElroy and McGown 1992;Hoff et al 1997). The use of airborne lidar to determine lowertropospheric aerosol distributions is well established (Uthe 1983;McElroy and McGown 1992;Hoff et al 1997).…”

Section: Introductionmentioning

confidence: 99%

A Study of Air Quality in the Southeastern Hampton–Norfolk–Virginia Beach Region with Airborne Lidar Measurements and MODIS Aerosol Optical Depth Retrievals

Lewis

Young

Chu

2010

Journal of Applied Meteorology and Climatology

View full text Add to dashboard Cite

A study of air quality was performed using a compact, aircraft aerosol lidar designed in the Science Directorate at NASA Langley Research Center and Moderate Resolution Imaging Spectroradiometer (MODIS) aerosol optical depth (AOD) retrievals. Five flights of lidar measurements conducted in the Hampton-Norfolk-Virginia Beach, Virginia, region showed complex regional aerosol distributions. Comparisons with MODIS AOD at 10 km 3 10 km and 5 km 3 5 km resolutions show good agreement, with correlation R 2 values of 0.82 and 0.88, respectively. Linear regressions of particulate matter with a diameter of less than 2.5 mm (PM2.5) and AOD within the ranges of 5-40 mg m 23 and 0.05-0.7, respectively, result in R 2 values of ;0.64 and ;0.82 for MODIS and the Compact Aerosol Lidar, respectively. The linear regressions reflect approximately 51 mg m 23 to 1 AOD. These relationships are in agreement with previous findings for air pollution aerosols in the eastern United States and in northern Italy. However, large vertical variation is seen case by case, with planetary boundary layer heights ranging between 0.7 and 2 km and uncertainties ranging between 0.1 and 0.4 km. The results of the case studies suggest that AOD can be used as an indicator of surface measurements of PM2.5 but with larger uncertainties associated with small aerosol loading (AOD , 0.3).

show abstract

Application of Surface Based and Airborne Lidar Systems for Environmental Monitoring

Cited by 14 publications

References 7 publications

Atmospheric Aerosols: Some Highlights and Highlighters, 1950 to 2018

Atmospheric Aerosols: Some Highlights and Highlighters, 1950 to 2018

Techniques for laser remote sensing of the environment

A Study of Air Quality in the Southeastern Hampton–Norfolk–Virginia Beach Region with Airborne Lidar Measurements and MODIS Aerosol Optical Depth Retrievals

Contact Info

Product

Resources

About