Open AccessLidar measurements of Raman scattering at ultraviolet wavelength from mineral dust over East Asia
Author(s) -
Boyan Tatarov,
Detlef Müller,
Dong-Hwa Shin,
Seung Sook Shin,
Ina Mattis,
Patric Seifert,
Youngmin Noh,
Y. J. Kim,
Naoki Sugimoto
Publication year - 2011
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.19.001569
Subject(s) - lidar , raman scattering , wavelength , raman spectroscopy , materials science , quartz , mineral dust , optics , asian dust , ultraviolet , backscatter (email) , environmental science , analytical chemistry (journal) , aerosol , optoelectronics , chemistry , physics , environmental chemistry , meteorology , telecommunications , computer science , composite material , wireless
We developed a novel measurement channel that utilizes Raman scattering from silicon dioxide (SiO2) quartz at an ultraviolet wavelength (361 nm). The excitation of the Raman signals is done at the primary wavelength of 355 nm emitted from a lidar instrument. In combination with Raman signals from scattering from nitrogen molecules, we may infer the mineral-quartz-related backscatter coefficient. This technique thus allows us to identify in a comparably direct way the mineral quartz content in mixed pollution plumes that consist, e.g., of a mix of desert dust and urban pollution. We tested the channel for the complex situation of East Asian pollution. We find good agreement of the inferred mineral-quartz-related backscatter coefficient to results obtained with another mineral quartz channel which was operated at 546 nm (primary emission wavelength at 532 nm), the functionality of which has already been shown for a lidar system in Tsukuba (Japan). The advantage of the novel channel is that it provides a better signal-to-noise ratio because of the shorter measurement wavelength.