Comparison of aerosol optical properties and water vapor among ground and airborne lidars and Sun photometers during TARFOX

2000 ◽  
Vol 105 (D8) ◽  
pp. 9917-9933 ◽  
Author(s):  
R. Ferrare ◽  
S. Ismail ◽  
E. Browell ◽  
V. Brackett ◽  
M. Clayton ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Aerosol Optical Properties

Aerosol optical properties and precipitable water vapor column in the atmosphere of Norway

2015 ◽  
Vol 54 (6) ◽  
pp. 1505 ◽  
Author(s):  
Dennis Muyimbwa ◽  
Øyvind Frette ◽  
Jakob J. Stamnes ◽  
Taddeo Ssenyonga ◽  
Yi-Chun Chen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Precipitable Water ◽  
Precipitable Water Vapor ◽  
Aerosol Optical Properties

scholarly journals Comparisons of LASE, aircraft, and satellite measurements of aerosol optical properties and water vapor during TARFOX

2000 ◽  
Vol 105 (D8) ◽  
pp. 9935-9947 ◽  
Author(s):  
R. Ferrare ◽  
S. Ismail ◽  
E. Browell ◽  
V. Brackett ◽  
S. Kooi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Satellite Measurements ◽  
Aerosol Optical Properties

Enhanced water vapor in Asian dust layer: Entrainment processes and implication for aerosol optical properties

2006 ◽  
Vol 40 (13) ◽  
pp. 2409-2421 ◽  
Author(s):  
Soon-Chang Yoon ◽  
Sang-Woo Kim ◽  
Jiyoung Kim ◽  
Byung-Ju Sohn ◽  
Anne Jefferson ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Asian Dust ◽  
Aerosol Optical Properties ◽  
Dust Layer

scholarly journals Development of on-site self-calibration and retrieval methods for sky-radiometer observations of precipitable water vapor

2019 ◽  
Author(s):  
Masahiro Momoi ◽  
Rei Kudo ◽  
Kazuma Aoki ◽  
Tatsuhiro Mori ◽  
Kazuhiko Miura ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Solar Irradiance ◽  
Precipitable Water ◽  
Dry Season ◽  
Calibration Constant ◽  
Aerosol Optical Properties ◽  
Vapor Channel ◽  
Long Term Observation

Abstract. The Prede sky-radiometer, whose aerosol channels are calibrated by on-site measurements (the Improved Langley method), has been used for continuous long-term observation of aerosol properties. However, continuous long-term observation of precipitable water vapor (PWV) by sky-radiometer remain challenge, because the water vapor channel is generally calibrated by the standard Langley method at limited observation sites (e.g., the Mauna Loa Observatory). In this study, we developed SKYMAP, a new onsite self-calibration method for the water vapor channel of the Prede sky-radiometer using diffuse radiances normalized by direct solar irradiance. The SKYMAP algorithm consists of three steps. First, aerosol optical and microphysical properties are retrieved using direct solar irradiances and the normalized diffuse radiances at aerosol channels. The aerosol optical properties at the water vapor channel are interpolated from those at aerosol channels. Second, the transmittance of PWV is retrieved using the diffuse radiance normalized to the direct solar irradiance at the water vapor channel, which does not need the calibration constant. Third, the calibration constant at the water vapor channel is estimated from the transmittance of PWV and aerosol optical properties. Intensive sensitivity tests of SKYMAP using simulated data of the sky-radiometer showed that the calibration constant is retrieved reasonably well for PWV < 2 cm, indicating that SKYMAP can calibrate the water vapor channel on-site in dry conditions. Then SKYMAP was applied to actual measurements in the dry season at two sites (Tsukuba and Chiba, Japan). Because the SKYMAP algorithm is useful for clear-sky and low PWV (< 2 cm) conditions, the water vapor channel was calibrated for the dry season. After determining the calibration constant, PWV is able to be retrieved using direct solar irradiances for the whole year. The retrieved PWV values correspond well to those derived from a Global Navigation Satellite System (GNSS)/Global Positioning System (GPS) receiver, a microwave radiometer, and a AERONET sun-sky radiometer at both sites (correlation coefficient γ > 0.96), indicating that the Prede sky-radiometer provides both aerosol and PWV data based on its unique on-site calibration methods.

scholarly journals Investigating Wavelength-Dependent Aerosol Optical Properties Using Water Vapor Slant Column Retrievals from CLARS over the Los Angeles Basin

2016 ◽  
Author(s):  
Zhao-Cheng Zeng ◽  
Qiong Zhang ◽  
Jack S. Margolis ◽  
Run-Lie Shia ◽  
Sally Newman ◽  
...  
Keyword(s):  
Optical Properties ◽  
Water Vapor ◽  
Los Angeles ◽  
Near Infrared ◽  
Wavelength Dependence ◽  
Single Scattering ◽  
Aerosol Optical Properties ◽  
Absorption Bands ◽  
Novel Approach ◽  
Aerosol Scattering

Abstract. In this study, we propose a novel approach to constrain the optical properties of atmospheric aerosol in a complex urban environment using water vapor (H2O) slant column measurements in the near infrared. This approach is demonstrated using measurements from the California Laboratory for Atmospheric Remote Sensing Fourier Transform Spectrometer (CLARS-FTS) on the top of Mt. Wilson, California, and a two-stream-exact single scattering (2S-ESS) radiative transfer (RT) model. From the spectral measurements, we retrieve H2O slant column density (SCD) using 15 different absorption bands between 4000 and 8000 cm−1. Due to the wavelength dependence of aerosol scattering, large variations in H2O SCD retrievals are observed as a function of wavelength. Moreover, the variations are found to be correlated with aerosol optical depths (AOD) measured at the AERONET-Caltech station. Simulation results from the RT model reproduce this correlation and show that the aerosol scattering is the primary contributor to the variations in the wavelength dependence of the H2O SCD retrievals. The evidence from both measurements and simulations suggest that wavelength-dependent aerosol optical properties can be constrained using H2O retrievals from multiple bands.

Temporal and spatial variations of aerosol optical properties over the Korean peninsula during KORUS-AQ

2021 ◽  
pp. 118301
Author(s):  
Yongjoo Choi ◽  
Young Sung Ghim ◽  
Michal Segal Rozenhaimer ◽  
Jens Redemann ◽  
Samuel E. LeBlanc ◽  
...  
Keyword(s):  
Optical Properties ◽  
Korean Peninsula ◽  
Spatial Variations ◽  
Aerosol Optical Properties ◽  
Temporal And Spatial Variations ◽  
Temporal And Spatial

MODELING OF AEROSOL OPTICAL PROPERTIES AT AN INDIAN COASTAL SITE DURING THE 1999 INDOEX FIELD PHASE

2001 ◽  
Vol 32 ◽  
pp. 423-424
Author(s):  
S.C. ALFARO ◽  
L. GOMES ◽  
A. GAUDICHET ◽  
J.L. RAJOT ◽  
J.F. LEON ◽  
...  
Keyword(s):  
Optical Properties ◽  
Field Phase ◽  
Aerosol Optical Properties ◽  
Coastal Site
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