Joint elastic side-scattering LIDAR and Raman LIDAR measurements of aerosol optical properties in south east Colorado

Abstract. We present recent progress on nighttime retrievals of aerosol and cloud optical properties over the PEARL (Polar Environmental Atmospheric Research Laboratory) station at Eureka (Nunavut, Canada) in the High Arctic (80° N, 86° W). In the spring of 2011 and 2012, a star photometer was employed to acquire aerosol optical depth (AOD) data, while vertical aerosol and cloud backscatter profiles were measured using the CANDAC Raman Lidar (CRL). We used a simple backscatter coefficient threshold (βthr) to distinguish aerosols from clouds and, assuming that aerosols were largely fine mode (FM)/sub-micron, to distinguish FM aerosols from coarse mode (CM)/super-micron cloud or crystal particles. Using prescribed lidar ratios, we computed FM and CM AODs that were compared with analogous AODs estimated from spectral star photometry. We found (βthr dependent) coherences between the lidar and star photometer for both FM events and CM cloud and crystal events with averaged, FM absolute differences being

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Studies on Aerosol Optical Properties at High Altitude Station in Western Himalayas Using Raman Lidar

EPJ Web of Conferences ◽

10.1051/epjconf/202023702034 ◽

2020 ◽

Vol 237 ◽

pp. 02034

Author(s):

Shishir Kumar Singh ◽

Jaswant ◽

S.R. Radhakrishnan ◽

Davender Sethi ◽

Chhemendra Sharma

Keyword(s):

Optical Properties ◽

Extinction Coefficient ◽

Spherical Particles ◽

Western Himalayas ◽

Depolarization Ratio ◽

Raman Lidar ◽

Inversion Algorithm ◽

Backscatter Coefficient ◽

Aerosol Optical Properties ◽

Linear Depolarization Ratio

The aerosol optical properties have been investigated using the Raman lidar system for the month of November 2018 at the western Himalayan station of Palampur. Before deriving the optical properties, the lidar data has been applied with initial pre-processing such as Dead time correction, atmospheric noise correction, temporal and spatial averaging, range correction, gluing etc. The optical properties such as backscatter coefficient, extinction coefficient and linear depolarization ratio have been derived by using the inversion algorithm proposed by Fernald. The results show that the backscatter coefficient was found in the range from 9.00E-9 m−1sr−1 to 4.97E-6 m−1sr−1 and the extinction coefficient was found in the range from 3.16E-7m-1 to 1.74E-4m-1. The Linear depolarization ratio was in the range from 0.0179 to 0.621 with lower values at near heights suggesting the dominance of spherical particles at the lower heights. We have also observed a cloud layer at a height of 9.5 km to 12.1 km with high depolarization ratio during the observation period on 22/11/2018.

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Airborne lidar measurements of aerosol optical properties during SAFARI-2000

Journal of Geophysical Research Atmospheres ◽

10.1029/2002jd002370 ◽

2003 ◽

Vol 108 (D13) ◽

pp. n/a-n/a ◽

Cited By ~ 53

Author(s):

Matthew J. McGill ◽

Dennis L. Hlavka ◽

William D. Hart ◽

Ellsworth J. Welton ◽

James R. Campbell

Keyword(s):

Optical Properties ◽

Airborne Lidar ◽

Aerosol Optical Properties ◽

Lidar Measurements

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Statistical analysis of aerosol optical properties retrieved by Raman lidar over Southeastern Spain

Tellus B ◽

10.3402/tellusb.v65i0.21234 ◽

2013 ◽

Vol 65 (1) ◽

pp. 21234 ◽

Cited By ~ 35

Author(s):

Francisco Navas-Guzmán ◽

Juan Antonio Bravo-Aranda ◽

Juan Luis Guerrero-Rascado ◽

María José Granados-Muñoz ◽

LUCAS Alados-Arboledas

Keyword(s):

Optical Properties ◽

Statistical Analysis ◽

Raman Lidar ◽

Aerosol Optical Properties ◽

Southeastern Spain

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Improved method to retrieve aerosol optical properties from combined elastic backscatter and Raman lidar data

Applied Physics B ◽

10.1007/s00340-013-5648-2 ◽

2013 ◽

Vol 116 (1) ◽

pp. 61-67 ◽

Cited By ~ 6

Author(s):

Jia Su ◽

Yonghua Wu ◽

M. Patrick McCormick ◽

Liqiao Lei ◽

Robert B. Lee

Keyword(s):

Optical Properties ◽

Lidar Data ◽

Raman Lidar ◽

Improved Method ◽

Aerosol Optical Properties

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Review of “Properties of biomass burning aerosol mixtures derived at fine temporal and spatial scales from Raman lidar measurements: Part I optical properties” by Janicka and Stachlewska

10.5194/acp-2019-207-rc2 ◽

2019 ◽

Author(s):

Anonymous

Keyword(s):

Optical Properties ◽

Biomass Burning ◽

Spatial Scales ◽

Raman Lidar ◽

Lidar Measurements ◽

Biomass Burning Aerosol ◽

Temporal And Spatial

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Seasonal variability of aerosol optical properties observed by means of a Raman lidar at an EARLINET site over Northeastern Spain

Atmospheric Chemistry and Physics ◽

10.5194/acp-11-175-2011 ◽

2011 ◽

Vol 11 (1) ◽

pp. 175-190 ◽

Cited By ~ 47

Author(s):

M. Sicard ◽

F. Rocadenbosch ◽

M. N. M. Reba ◽

A. Comerón ◽

S. Tomás ◽

...

Keyword(s):

Boundary Layer ◽

Optical Properties ◽

Planetary Boundary Layer ◽

Optical Thickness ◽

Seasonal Variability ◽

Aerosol Optical Thickness ◽

Saharan Dust ◽

Raman Lidar ◽

Aerosol Optical Properties ◽

Lidar Ratio

Abstract. The annual and seasonal variability of aerosol optical properties observed by means of a Raman lidar over Northeastern Spain has been assessed. The lidar representativeness has first been checked against sun-photometer measurements in terms of aerosol optical thickness. Then the annual cycle and the seasonal variability of the planetary boundary layer aerosol optical thickness and its fraction compared to the columnar optical thickness, the lidar ratio, the backscatter-related Ångström exponent and the planetary boundary layer height are analyzed and discussed. Winter and summer mean profiles of extinction, backscatter and lidar ratio retrieved with the Raman algorithm are presented. The analysis shows the impact of most of the natural events (Saharan dust intrusions, wildfires, etc.) and meteorological situations (summer anticyclonic situation, the formation of the Iberian thermal low, winter long-range transport from North Europe and/or North America, re-circulation flows, etc.) occurring in the Barcelona area. A detailed study of a special event including a combined intrusion of Saharan dust and biomass-burning particles proves the suitability of combining the retrieval of aerosol optical properties from Raman and pure elastic lidar measurements to discriminate spatially different types of aerosols and to follow their spatial and temporal evolution.

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Seventeen-year systematic measurements of dust aerosol optical properties using the eole ntua lidar system (2000-2016)

EPJ Web of Conferences ◽

10.1051/epjconf/201817605029 ◽

2018 ◽

Vol 176 ◽

pp. 05029

Author(s):

Ourania Soupiona ◽

Maria Mylonaki ◽

Alexandros Papayannis ◽

Athina Argyrouli ◽

Panayotis Kokkalis ◽

...

Keyword(s):

Optical Properties ◽

Mean Value ◽

Saharan Dust ◽

Aerosol Optical Properties ◽

Mean Values ◽

Time Period ◽

Lidar Measurements ◽

Multi Wavelength ◽

Lidar Ratio ◽

Dust Events

A comprehensive analysis of the seasonal variability of the optical properties of Saharan dust aerosols over Athens, Greece, is presented for a 17-year time period (2000-2016), as derived from multi-wavelength Raman lidar measurements (57 dust events with more than 80 hours of measurements). The profiles of the derived aerosol optical properties (aerosol backscatter and extinction coefficients, lidar ratio and aerosol Ångström exponent) at 355 nm are presented. For these dust events we found a mean value of the lidar ratio of ~52±13 sr at 355 nm and of ~58±8 sr (not shown) at 532 nm (2-4 km a.s.l. height). For our statistical analysis, presented here, we used monthly-mean values and time periods under cloud-free conditions. The number of dust events was greatest in late spring, summer, and early autumn periods. In this paper we also present a selected case study (04 April 2016) of desert dust long-range transport from the Saharan desert.

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