scholarly journals Retrieval of the Variation of Optical Characteristics of Asian Dust Plume according to their Vertical Distributions using Multi-wavelength Raman LIDAR System

2014 ◽  
Vol 30 (5) ◽  
pp. 597-605 ◽  
Author(s):  
Sung-Kyun Shin ◽  
Young-San Park ◽  
Byoung-Choel Choi ◽  
Kwonho Lee ◽  
Dongho Shin ◽  
...  
Keyword(s):  
Asian Dust ◽  
Optical Characteristics ◽  
Raman Lidar ◽  
Lidar System ◽  
Vertical Distributions ◽  
Multi Wavelength

Study on the Variation of Optical Properties of Asian Dust Plumes according to their Transport Routes and Source Regions using Multi-wavelength Raman LIDAR System

2014 ◽  
Vol 30 (2) ◽  
pp. 241-249 ◽  
Author(s):  
Sung-Kyun Shin ◽  
Youngmin Noh ◽  
Kwonho Lee ◽  
Dongho Shin ◽  
KwanChul Kim ◽  
...  
Keyword(s):  
Optical Properties ◽  
Asian Dust ◽  
Raman Lidar ◽  
Lidar System ◽  
Source Regions ◽  
Multi Wavelength

scholarly journals Retrieval of Vertical Single-scattering albedo of Asian dust using Multi-wavelength Raman Lidar System

2013 ◽  
Vol 29 (4) ◽  
pp. 415-421 ◽  
Author(s):  
Youngmin Noh ◽  
Chulkyu Lee ◽  
Kwanchul Kim ◽  
Sungkyun Shin ◽  
Dongho Shin ◽  
...  
Keyword(s):  
Single Scattering ◽  
Asian Dust ◽  
Single Scattering Albedo ◽  
Raman Lidar ◽  
Lidar System ◽  
Multi Wavelength

scholarly journals CADEX and beyond: Installation of a new PollyXT site in Dushanbe

2019 ◽  
Vol 99 ◽  
pp. 02010
Author(s):  
Ronny Engelmann ◽  
Julian Hofer ◽  
Abduvosit N. Makhmudov ◽  
Holger Baars ◽  
Karsten Hanbuch ◽  
...  
Keyword(s):  
Asian Dust ◽  
Raman Lidar ◽  
Technical Institute ◽  
Lidar System ◽  
Microphysical Properties ◽  
Source Regions ◽  
Central Asian ◽  
Lidar Measurements ◽  
Academy Of Sciences

During the 18-month Central Asian Dust Experiment we conducted continuous lidar measurements at the Physical Technical Institute of the Academy of Sciences of Tajikistan in Dushanbe between 2015 and 2016. Mineral dust plumes from various source regions have been observed and characterized in terms of their occurrence, and their optical and microphysical properties with the Raman lidar PollyXT. Currently a new container-based lidar system is constructed which will be installed for continuous long-term measurements in Dushanbe.

scholarly journals Multi-wavelength Raman lidar, sunphotometric and aircraft measurements in combination with inversion models for the estimation of the aerosol optical and physico-chemical properties over Athens, Greece

2012 ◽  
Vol 5 (1) ◽  
pp. 589-625
Author(s):  
R. E. Mamouri ◽  
A. Papayannis ◽  
V. Amiridis ◽  
D. Müller ◽  
P. Kokkalis ◽  
...  
Keyword(s):  
Water Vapor ◽  
Chemical Properties ◽  
Urban Site ◽  
Aircraft Measurements ◽  
Raman Lidar ◽  
Lidar System ◽  
Aerosol Composition ◽  
Microphysical Properties ◽  
Multi Wavelength

Abstract. A novel procedure has been developed to retrieve, simultaneously, the optical, microphysical and chemical properties of tropospheric aerosols with a multi-wavelength Raman lidar system in the troposphere over an urban site (Athens, Greece: 37.9° N, 23.6° E, 200 m a.s.l.) using data obtained during the European Space Agency (ESA) THERMOPOLIS project which took place between 15–31 July 2009 over the Greater Athens Area (GAA). We selected to apply our procedure for a case study of intense aerosol layers occurred on 20–21 July 2009. The National Technical University of Athens (NTUA) EOLE 6-wavelength Raman lidar system has been used to provide the vertical profiles of the optical properties of aerosols (extinction and backscatter coefficients, lidar ratio) and the water vapor mixing ratio. An inversion algorithm was used to derive the mean aerosol microphysical properties (mean effective radius – reff), single-scattering albedo (ω) and mean complex refractive index (m) at selected heights in the 2–3 km height region. We found that reff was 0.3–0.4 μm, ω at 532 nm ranged from 0.63 to 0.88 and m ranged from 1.45 + 0.015i to 1.56 + 0.05i, in good accordance with in situ aircraft measurements. The final data set of the aerosol microphysical properties along with the water vapor and temperature profiles were incorporated into the ISORROPIA model to infer an in situ aerosol composition consistent with the retrieved m and ω values. The retrieved aerosol chemical composition in the 2–3 km height region gave a variable range of sulfate (0–60%) and organic carbon (OC) content (0–50%), although the OC content increased (up to 50%) and the sulfate content dropped (up to 30%) around 3 km height; in connection with the retrieved low ω value (0.63), indicates the presence of absorbing biomass burning smoke mixed with urban haze. Finally, the retrieved aerosol microphysical properties were compared with column-integrated sunphotometer data.

Aerosol lidar ratio characteristics measured by a multi-wavelength Raman lidar system at Anmyeon Island, Korea

2007 ◽  
Vol 86 (1) ◽  
pp. 76-87 ◽  
Author(s):  
Young M. Noh ◽  
Young J. Kim ◽  
Byoung C. Choi ◽  
Toshiyuki Murayama
Keyword(s):  
Raman Lidar ◽  
Lidar System ◽  
Multi Wavelength ◽  
Lidar Ratio

Optical properties of mixed aerosol layers over Japan derived with multi-wavelength Mie–Raman lidar system

2017 ◽  
Vol 188 ◽  
pp. 20-27 ◽  
Author(s):  
Yukari Hara ◽  
Tomoaki Nishizawa ◽  
Nobuo Sugimoto ◽  
Ichiro Matsui ◽  
Xiaole Pan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Raman Lidar ◽  
Lidar System ◽  
Multi Wavelength

scholarly journals Multi-wavelength Raman lidar, sun photometric and aircraft measurements in combination with inversion models for the estimation of the aerosol optical and physico-chemical properties over Athens, Greece

2012 ◽  
Vol 5 (7) ◽  
pp. 1793-1808 ◽  
Author(s):  
R. E. Mamouri ◽  
A. Papayannis ◽  
V. Amiridis ◽  
D. Müller ◽  
P. Kokkalis ◽  
...  
Keyword(s):  
Water Vapor ◽  
Chemical Properties ◽  
Urban Site ◽  
Aircraft Measurements ◽  
Raman Lidar ◽  
Lidar System ◽  
Aerosol Composition ◽  
Microphysical Properties ◽  
Multi Wavelength

Abstract. A novel procedure has been developed to retrieve, simultaneously, the optical, microphysical and chemical properties of tropospheric aerosols with a multi-wavelength Raman lidar system in the troposphere over an urban site (Athens, Greece: 37.9° N, 23.6° E, 200 m a.s.l.) using data obtained during the European Space Agency (ESA) THERMOPOLIS project, which took place between 15–31 July 2009 over the Greater Athens Area (GAA). We selected to apply our procedure for a case study of intense aerosol layers that occurred on 20–21 July 2009. The National Technical University of Athens (NTUA) EOLE 6-wavelength Raman lidar system has been used to provide the vertical profiles of the optical properties of aerosols (extinction and backscatter coefficients, lidar ratio) and the water vapor mixing ratio. An inversion algorithm was used to derive the mean aerosol microphysical properties (mean effective radius (reff), single-scattering albedo ω) and mean complex refractive index (m)) at selected heights in the 2–3 km height region. We found that reff was 0.14–0.4 (±0.14) μm, ω was 0.63–0.88 (±0.08) (at 532 nm) and m ranged from 1.44 (±0.10) + 0.01 (±0.01)i to 1.55 (±0.12) + 0.06 (±0.02)i, in good agreement (only for the reff values) with in situ aircraft measurements. The water vapor and temperature profiles were incorporated into the ISORROPIA II model to propose a possible in situ aerosol composition consistent with the retrieved m and ω values. The retrieved aerosol chemical composition in the 2–3 km height region gave a variable range of sulfate (0–60%) and organic carbon (OC) content (0–50%), although the OC content increased (up to 50%) and the sulfate content dropped (up to 30%) around 3 km height; the retrieved low ω value (0.63), indicates the presence of absorbing biomass burning smoke mixed with urban haze. Finally, the retrieved aerosol microphysical properties were compared with column-integrated sun photometer CIMEL data.

scholarly journals Characterization of Asian dust and Siberian smoke with multi-wavelength Raman lidar over Tokyo, Japan in spring 2003

2004 ◽  
Vol 31 (23) ◽  
Author(s):  
Toshiyuki Murayama ◽  
Detlef Müller ◽  
Katsuya Wada ◽  
Atsushi Shimizu ◽  
Miho Sekiguchi ◽  
...  
Keyword(s):  
Asian Dust ◽  
Raman Lidar ◽  
Multi Wavelength

scholarly journals Design of the Ship-Borne Multi-Wavelength Polarization Ocean Lidar System and Measurement of Seawater Optical Properties

2020 ◽  
Vol 237 ◽  
pp. 07007
Author(s):  
Qi Liu ◽  
Bingyi Liu ◽  
Songhua Wu ◽  
Jintao Liu ◽  
Kailin Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Attenuation Coefficient ◽  
Jiaozhou Bay ◽  
Field Of View ◽  
Optical Parameters ◽  
Ocean Optics ◽  
Lidar System ◽  
Sea Trial ◽  
Vertical Distributions ◽  
Multi Wavelength

A ship-borne multi-wavelength polarization ocean lidar system LOOP (Lidar for Ocean Optics Profiler) is introduced in detail, aiming to obtain high-precision vertical profiles of seawater optical characteristics. Based on Monte-Carlo simulation, the receiving telescope is designed with a variable field of view, producing system attenuation coefficient (Klidar) approximating the optical parameters of seawater under a different field of view and water body conditions. At first, a sea trial was conducted in Jiaozhou Bay, and the measured diffuse attenuation coefficient (Kd) of seawater was 0.3m−1, being in good agreement compared with the results measured by field instrument TriOS. Then a field campaign was organized in the South China Sea. The measurement of the seawater diffuse attenuation (Kd) was 0.035m−1. These results support the prospects that lidar, as an effective tool supplement to traditional passive ocean color remote sensing, can provide the vertical distributions of optical properties in the upper ocean.

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