Open AccessA mobile differential absorption lidar for simultaneous observations of tropospheric and stratospheric ozone over Tibet
Author(s) -
Xin Fang,
Tao Li,
Chao Ban,
Zhaopeng Wu,
Jing Li,
Feng Li,
Yetao Cen,
Baogang Tian
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.004126
Subject(s) - lidar , optics , rayleigh scattering , remote sensing , troposphere , environmental science , absorption (acoustics) , altitude (triangle) , telescope , tropospheric ozone , stratosphere , diffuse sky radiation , materials science , physics , atmospheric sciences , geology , scattering , geometry , mathematics
We developed a mobile ozone differential absorption lidar system to simultaneously measure the vertical profiles of tropospheric and stratospheric ozone from an altitude of ~5 to 50 km. The system emits four laser beams at wavelength of 289 nm, 299 nm, 308 nm and 355 nm and receives their corresponding Mie/Rayleigh backscattering return signals, and two N 2 Raman return signals at 332 nm and 387 nm shifted from 308 nm and 355 nm, respectively. An assembled telescope array with four 1.25-m telescopes (effective diameter > 2 m) collects the Rayleigh and Raman backscattering signals at 308/332 and 355/387 nm. This system is currently deployed at the Yangbajing Observatory in Tibet (~4300 m elevation) and has begun observations in regular campaign mode since October 2017. The lidar results agree very well with those observed by the Aura/MLS satellite. This novel ozone lidar system operates at the highest elevation of any such system in the world. The higher elevation and larger receiver aperture of this system yield a higher signal-to-noise ratio and lower statistical uncertainty.