scholarly journals Tracking and Characterization of Aircraft Wakes Using Acoustic and Lidar Measurements

Author(s):  
Earl Booth ◽  
William Humphreys
Keyword(s):  
2003 ◽  
Vol 3 (5) ◽  
pp. 4671-4700
Author(s):  
D. S. Balis ◽  
V. Amiridis ◽  
C. Zerefos ◽  
A. Kazantzidis ◽  
S. Kazadzis ◽  
...  

Abstract. Routine lidar measurements of the vertical distribution of the aerosol extinction coefficient and the extinction-to-backscatter ratio have been performed at Thessaloniki, Greece using a Raman lidar system in the frame of the EARLINET project since 2000. Spectral and broadband UV-B irradiance measurements, as well as total ozone observations, were available whenever lidar measurements were obtained. From the available measurements several cases could be identified that allowed the study of the effect of different types of aerosol on the levels of the UV-B solar irradiance at the Earth's surface. The TUV radiative transfer model has been used to simulate the irradiance measurements, using total ozone and the lidar aerosol data as input. From the comparison of the model results with the measured spectra the effective single scattering albedo was determined using an iterative procedure, which has been verified against results from the 1998 Lindenberg Aerosol Characterization Experiment. It is shown that the same aerosol optical depth and same total ozone values can show differences up to 10% in the UV-B irradiance at the Earth's surface, which can be attributed to differences in the aerosol type. It is shown that the combined use of the estimated single scattering albedo and the measured extinction-to-backscatter ratio leads to a better characterization of the aerosol type probed.


Tellus B ◽  
2011 ◽  
Vol 63 (4) ◽  
Author(s):  
Silke Groß ◽  
Josef Gasteiger ◽  
Volker Freudenthaler ◽  
Matthias Wiegner ◽  
Alexander Geiß ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-36 ◽  
Author(s):  
L. Mona ◽  
Z. Liu ◽  
D. Müller ◽  
A. Omar ◽  
A. Papayannis ◽  
...  

We provide an overview of light detection and ranging (lidar) capability for describing and characterizing desert dust. This paper summarizes lidar techniques, observations, and fallouts of desert dust lidar measurements. The main objective is to provide the scientific community, including nonpractitioners of lidar observations with a reference paper on dust lidar measurements. In particular, it will fill the current gap of communication between research-oriented lidar community and potential desert dust data users, such as air quality monitoring agencies and aviation advisory centers. The current capability of the different lidar techniques for the characterization of aerosol in general and desert dust in particular is presented. Technical aspects and required assumptions of these techniques are discussed, providing readers with the pros and cons of each technique. Information about desert dust collected up to date using lidar techniques is reviewed. Lidar techniques for aerosol characterization have a maturity level appropriate for addressing air quality and transportation issues, as demonstrated by some first results reported in this paper.


1998 ◽  
Vol 32 (17) ◽  
pp. 2957-2967 ◽  
Author(s):  
J. Kasparian ◽  
E. Frejafon ◽  
P. Rambaldi ◽  
J. Yu ◽  
B. Vezin ◽  
...  

Tellus B ◽  
2011 ◽  
Vol 63 (4) ◽  
pp. 706-724 ◽  
Author(s):  
Silke Groß ◽  
Matthias Tesche ◽  
Volker Freudenthaler ◽  
Carlos Toledano ◽  
Matthias Wiegner ◽  
...  

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