Related Experiment Video
Updated: Jan 1, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
10.8K
Multiple scattering by aerosols as seen from CALIPSO - a Monte-Carlo modelling study
Optics Express
|December 28, 2019
Summary
Multiple scattering (MS) in satellite lidar data can be corrected using a new parameterization based on aerosol size and optical depth. This method improves accuracy by accounting for factors previously treated as random errors.
Area of Science:
- Atmospheric Science
- Remote Sensing
- Aerosol Optics
Background:
- Satellite-borne lidar measurements are crucial for monitoring aerosols.
- Multiple scattering (MS) effects can introduce significant errors in these measurements.
- Accurate correction of MS is essential for reliable aerosol characterization.
Purpose of the Study:
- To investigate the impact of multiple scattering (MS) on satellite-borne lidar measurements.
- To develop a parameterization for the MS correction factor.
- To assess the bias introduced by neglecting MS or using constant correction factors.
Main Methods:
- Monte Carlo radiative transfer simulations were employed.
- A comprehensive set of 48 diverse aerosol scenarios were analyzed.
- The study focused on parameterizing the MS correction factor.
Main Results:
- The MS correction factor can be effectively parameterized using aerosol size and aerosol optical depth.
- Dependencies on vertical distribution and total optical depth were found to be within the scope of random error.
- A case study involving high sea salt concentrations demonstrated the parameterization's utility.
Conclusions:
- The proposed parameterization offers a more accurate approach to correcting MS in satellite lidar data.
- Ignoring MS or using a constant correction factor can lead to substantial negative bias in backscattered power.
- This research provides a valuable tool for improving aerosol retrieval from satellite lidar observations.
Related Concept Videos
01:12Precipitation Processes
4.5K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.5K
01:20Maxwell-Boltzmann Distribution: Problem Solving
2.8K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
2.8K
01:25Atomic Absorption Spectroscopy: Atomization Methods
1.3K
Atomic Absorption Spectroscopy (AAS) atomizes samples through flame atomization or electrothermal atomization. Flame atomization typically involves a nebulizer and spray chamber assembly to combine the sample with a fuel–oxidant mixture, creating a fine aerosol mist that enters a burner. Typically, the fuel and oxidant are combined in an approximately stoichiometric ratio. However, for atoms that are easily oxidized, a fuel-rich mixture may be more advantageous. Only about 5% of the...
1.3K