Youngmin Noh

Retrieval of Aerosol Extinction in the Lower Troposphere Based on UV MAX-DOAS Measurements

Multi Axis Differential Optical Absorption Spectroscopy (MAX-DOAS) has been utilized in recent years as a means of deriving vertical profiles of aerosol and trace gases; however, this new technique requires further validation because few studies have investigated its capability. In this study, vertical distributions of aerosol extinction coefficients (AECs) in the lower troposphere were retrieved by applying a recently developed aerosol-retrieval algorithm to O4 slant column densities (SCDs) measured at a UV wavelength (356 nm) using the MAX-DOAS technique. The MAX-DOAS measurements were conducted at the Korea Global Atmosphere Watch Observatory (KGAWO) located off the west coast of Korea during a period of seven cloudless days in May and June 2005. The AECs measured by UV MAX-DOAS varied from 0.05 to 0.73 km−1 in the 0–1 km layer and from 0.01 to 0.20 km−1 in the 1–2 km layer. The AECs for the 1–2 km layer from UV MAX-DOAS are in agreement with lidar data within about 60%. Our results demonstrate the ability of MAX-DOAS as a remote sensing technique for surface aerosol measurements.

2-dimensional Mapping of Sulfur Dioxide and Bromine Oxide at the Sakurajima Volcano with a Ground Based Scanning Imaging Spectrograph System

A scanning imaging spectrograph system was used in this study to retrieve readings of the 2-D distribution of lTEXg

Depolarization Ratio Retrievals Using AERONET Sun Photometer Data

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Lower Tropospheric Aerosol Measurements by MAX-DOAS During Severe Asian Dust Period

l/TEXg and BrO around the crater of the Sakurajima volcano in Japan. The measurement was carried out during the daytime on November 2, 2005. Measurements were made at the surface of the site, located 5 km from the Sakurajima crater. One hundred horizontal scans were performed. Each column scanned by the system consists of 64 vertical pixels in order to retrieve the spatial distributions of BrO and lTEXg

Classification of Dust/Non-dust Particle from the Asian Dust Plumes and Retrieval of Microphysical Properties using Raman Lidar System

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Retrieval of Aerosol Microphysical Parameter by Inversion Algorithm using Multi-wavelength Raman Lidar Data

l/TEXg in the plume in terms of slant column densities (SCDs). Measured spectra were analyzed to identify and quantify lTEXg

On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product

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Retrieval of Dust Backscatter Coefficient using Quartz Raman Channel in Lidar Measurements

l/TEXg and BrO in the volcanic plume utilizing the plumes specific absorption features in the ultra violet region. Two-dimensional BrO and lTEXg

Derivation of the Ambient Nitrogen Dioxide Mixing Ratio over a Traffic Road Site Based on Simultaneous Measurements Using a Ground-based UV Scanning Spectrograph

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Development of Concurrent Multi Path (CMP)-Differential Optical Absorption Spectroscopy (DOAS) for Remote Sensing of Surface Atmospheric Gases

l/TEXg distributions in SCD were retrieved horizontally covering the upwind, crater and downwind areas, and vertically, including the plume in the center of the scanned image. Both horizontal and vertical dispersions of lTEXg