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CSIR Constructs Mobile Lidar at UNIZULU for Air Quality Monitoring

Photonics.com
Oct 2018
PRETORIA, South Africa, Oct. 4, 2018 — The Council for Scientific and Industrial Research (CSIR), an African R&D organization, has designed and constructed a mobile lidar lab at the University of Zululand (UNIZULU) to monitor air quality in the uMhlathuze municipality.

UNIZULU is the second university to have and operate a lidar system within in its premises in South Africa. The atmospheric laser radar is a state-of-the-art instrument that uses the most powerful techniques for active remote sensing of Earth’s atmosphere. It uses laser pulses to measure atmospheric constituents such as aerosols particles, water vapor, clouds, ice crystals, and even trace gases. The CSIR-designed mobile lidar system will be used to provide profiles of aerosols from the surface to upper troposphere in the uMhlathuze region.

The research project, led by Nkanyiso Mbatha from UNIZULU in collaboration with Sivakumar Venkataraman from the University of KwaZulu-Natal (UKZN), is important because lidar measurements contribute significantly to topics such as weather forecasting, climate modelling, and environmental monitoring.

Mbatha says the uMhlathuze local municipality is a region with high industrial activity, which could lead to changes in local air quality and other environmental issues. The locally based mobile lidar system will assist the municipality in monitoring the air quality of the region.

“Dr. Mbatha’s interest was to investigate the chemical composition of the troposphere over the city of uMhlathuze, using different ground-based lidar systems, space-borne systems, and model simulation techniques,” said Hardus Greyling, national programs manager at the CSIR National Laser Center. “Having a ground-based lidar system in Richards Bay will therefore contribute to an already existing network of lidar systems and will be used to specifically study the atmosphere above Richards Bay, which could be negatively affected by industrial activity in the region.”

The CSIR, through the CSIR National Laser Centre Rental Pool Program, provides laser equipment and technical support to South African universities and their R&D programs. Over the past 18 years, the program, which is funded through a directed parliamentary grant from the Department of Science and Technology, has supported a large number of projects at universities across the country. The program aims to provide specialized laser equipment to the research community, in an effort to support research projects that result in knowledge generation.

GLOSSARY
lidar
An acronym of light detection and ranging, describing systems that use a light beam in place of conventional microwave beams for atmospheric monitoring, tracking and detection functions. Ladar, an acronym of laser detection and ranging, uses laser light for detection of speed, altitude, direction and range; it is often called laser radar.
laser
A device which operates under the processes of absorption and stimulated emission and by the condition that gain exceeds loss in order to sustain amplification. The term laser is the acronym for Light Amplification by the Stimulated Emission of Radiation. The standard components of a laser include: 1.) a lasing material known as the gain medium. 2.) a pump source. 3.) laser cavity To achieve lasing, the atoms of a material such as crystal, glass, liquid, dye or gas are excited by...
BusinessCouncil for Scientific and Industrial ResearchCSIRlidarUniversity of ZululandUNIZULUlaserSensors & DetectorsTest & Measurementair qualityAsia-Pacific

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