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Raman lidar observations of cloud liquid water
Vincenzo Rizi1, Marco Iarlori, Giuseppe Rocci
1Dipartimento di Fisica, Università Degli Studi L'Aquila, Via Vetoio Località Coppito, 67010 L'Aquila, Italy. vincenzo.rizi@aquila.infn.it
Applied Optics
|December 25, 2004
Summary
This study presents a Raman lidar system for monitoring atmospheric aerosols and water vapor. The system effectively measures cloud liquid water content, aiding in cloud property analysis.
Area of Science:
- Atmospheric Science
- Remote Sensing
- Lidar Technology
Background:
- Long-term monitoring of atmospheric properties like aerosols and water vapor is crucial for climate studies.
- Raman lidar systems offer advanced capabilities for profiling atmospheric constituents.
- Accurate measurement of cloud properties is essential for understanding cloud-aerosol interactions and climate feedback.
Purpose of the Study:
- To report the design and performance of a Raman lidar system for atmospheric monitoring.
- To evaluate the system's capability in detecting Raman backscattering from cloud liquid water.
- To discuss the critical measurements of cloud liquid water content and derived cloud properties.
Main Methods:
- Design and implementation of a Raman lidar system.
- Utilizing Raman backscattering for detecting cloud liquid water.
- Combining extinction coefficient and cloud water content for property estimation.
- Observation and analysis of low-level cumulus clouds.
Main Results:
- Demonstration of the Raman lidar system's performance for long-term monitoring.
- Successful detection of Raman backscattering from cloud liquid water.
- Measurement of cloud liquid water content and estimation of cloud droplet effective radii and number densities.
- Critical discussion of measurement uncertainties and system limitations.
Conclusions:
- The developed Raman lidar system is effective for monitoring tropospheric aerosols, water vapor, and cloud properties.
- The system shows promise for detailed cloud characterization, including liquid water content and droplet size distributions.
- Further improvements can enhance the system's capabilities for comprehensive atmospheric research.
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