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7 - Lidars for Profiling Aerosol Optical Properties, Atmospheric Temperature and Wind

Published online by Cambridge University Press:  24 February 2022

Chiao-Yao She  and
Jonathan S. Friedman
Chiao-Yao She
Affiliation:
Colorado State University
Jonathan S. Friedman
Affiliation:
Universidad Ana G. Mendez
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Summary

In Chapter 7, we present lidars for profiling atmospheric parameters such as aerosol optical properties, temperatures, and winds. We start with a description of methods for profiling the lidar aerosol-molecular ratio and determining aerosol optical properties. We present and compare techniques for these measurements, including Rayleigh and vibrational Raman integration, rotational Raman technique, and the use of multiple receiver channels with custom-built interference filters. We follow with a description of high-spectral resolution lidar (HSRL), including a detailed discussion of notch (atomic or molecular vapor) filters in the Cabannes scattering detection channels and what is required to make an “ideal” or near-ideal filter. From there, we describe wind profiling methods using Cabannes–Mie scattering, comparing coherent versus incoherent lidars. For HSRL, we describe a near-ideal filter based on absorption in potassium vapor at 770 nm. Following parameter profiling with Cabannes–Mie lidar, we close by describing temperature and wind profiling with laser-induced fluorescence. Here, we focus on Na and Fe lidars. We give summaries of daylight measurements and data processing algorithms, including uncertainty in measurements. We close by discussing scientific contributions by and challenges for these lidars.

Keywords

aerosol optical propertiesatmospheric temperature and wind measurementslidar aerosol-molecular ratioRayleigh Raman and high-spectral resolution lidarlidar measurement uncertaintiesnotch filters for lidar ratio temperature and wind measurementsmultiple receiver channelsmesopause-region temperature and wind measurementsFaraday filter and daylight measurements
Type
Chapter
Information
Atmospheric Lidar Fundamentals
Laser Light Scattering from Atoms and Linear Molecules
 , pp. 138 - 243
Publisher: Cambridge University Press
Print publication year: 2022

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