| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:20 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Laser remote sensing and the atmospheric studies (invited lecture)
Authors:
Doina Nicolae, E. Carstea, Anca Nemuc
Affiliation:
National Institute of Research and Development for Optoelectronics, Address: 409 Atomistilor Street, Măgurele, Ilfov, Romania,
E-mail
nnicol@inoe.inoe.ro
Keywords:
LIDAR, atmosphere, aerosol long-range transport
Abstract:
In recent years, the scientist from the field of the atmosphere sciences concluded that climate and climate changes depend on atmospheric composition and the physical processes induced by green house gases and aerosols. Therefore, the role of laser remote sensing increased in investigation of atmospheric composition and its vertical structure. In addition, the combination of lidar observations with in situ measurements and models provides a unique opportunity to conduct long-term inter-calibrations and complementary or simultaneous monitoring of different atmospheric parameters over various space-time scales. First information which can be immediately extracted from lidar measurements is the vertical profiles of some atmospheric components like aerosols and ozone. Aerosols concentration measured by lidars can serve as valuable tracers of air motion in the atmospheric boundary layer. The height of atmospheric boundary layer can also be determined by using the range corrected lidar signal. The multi-wavelength Raman lidar is used to observe significant variations in aerosol characteristics depending on the particle origins. First (backscatter and extinction coefficients) and second (lidar ratio, Angstrom exponents and colour ratios) level optical properties of aerosols are derived in order to assess the aerosol class. The knowledge of these parameters allows to quantify the impact of aerosols on climate and to assess, in turn, the feedback of climate change on atmospheric composition.
|
|
|
|