1. RETRIEVAL OF ATMOSPHERIC BOUNDARY LAYER HEIGHT BY CSIR-NLC MOBILE LIDAR, PRETORIA (25.5°S; 28.2°E), SOUTH AFRICA Prof. Venkataraman Sivakumar CSIR - National Laser Centre svenkataraman@csir.co.za [email_address]

3. © CSIR 2008 www.csir.co.za

4. System 3-D View

5. System Block Diagram

6. © CSIR 2008 www.csir.co.za It’s safe, person can walk around even when the laser is in operational.

7. © CSIR 2008 www.csir.co.za Initial Tests

8. Signal to Noise

9. © CSIR 2008 www.csir.co.za 0-16 km Upto 50 km 26 – 29 km 2-3 km

10. Preliminary Results 23 Feb 2008

11. Height profile of range corrected LIDAR signal returns and the illustration of detection of Boundary Layer by slope method.

12. Height-Time-Color map of LIDAR signal returns (arb.unit) for 10 August 2010. The figure is overlapped by the determined boundary layer height (Black: statistical based on range corrected signal, Pink: slope method) Temporal evolution of difference in detected boundary layer height.

14. Height-Time(diurnal)-Color map of LIDAR signal returns (arb.unit) for 16-17 October 2008. The figure is overlapped by the determined boundary layer height (Black: statistical based on range corrected signal, Pink: slope method) Temporal evolution of difference in detected boundary layer height.

15. LIDAR measurements at Elandsfontein

16. 01-02 December 2010

19. SANOX – Campaign Expt. 23-27 May 2011 23-24 May 2011 24 May 2011 27 May 2011

20. © CSIR 2008 www.csir.co.za Our future scientists

21. © CSIR 2008 www.csir.co.za Where does it go ? How does it impact ?

22. Schematic view of the planned LIDAR system with Scanner

23. Initial result from 2-Channel (532 nm and 355 nm)

26. Thank You