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Browsing by Author "Kolgotin, Alexei"
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3+2 + X: what is the most useful depolarization input for retrieving microphysical properties of non-spherical particles from lidar measurements using the spheroid model of Dubovik et al. (2006)?
Tesche, Matthias; Kolgotin, Alexei; Haarig, Moritz; Burton, Sharon P.; Ferrare, Richard A.; Hostetler, Chris A.; Mueller, Detlef (2019-08-19)The typical multiwavelength aerosol lidar data set for inversion of optical to microphysical parameters is composed of three backscatter coefficients (β) at 355, 532, and 1064 nm and two extinction coefficients (α) at 355 ... -
Characterization of atmospheric aerosols with multiwavelength Raman lidar
Mueller, D.; Mattis, I.; Kolgotin, Alexei; Ansmann, Albert; Wandinger, U.; Althausen, D. (SPIE, 2007)Multiwavelength Raman lidar observations have matured into a powerful tool for the vertical resolved characterization of optical and microphysical properties of atmospheric aerosol particles. Raman lidars that operate with ... -
HSRL-2 aerosol optical measurements and microphysical retrievals vs. airborne in situ measurements during DISCOVER-AQ 2013: : an intercomparison study
Mueller, Detlef; Sawamura, Patricia; Moore, Richard H.; Burton, Sharon P.; Chemyakin, Edward; Kolgotin, Alexei; Ferrare, Richard A.; Hostetler, Chris A.; Ziemba, Luke D.; Beyersdorf, Andreas J.; Anderson, Bruce E. (2017-06-16)We present a detailed evaluation of remotely-sensed aerosol microphysical properties obtained from an advanced, multi-wavelength High Spectral Resolution Lidar (HSRL-2) during the 2013 NASA DISCOVER-AQ field campaign. ... -
Improved identification of the solution space of aerosol microphysical properties derived from the inversion of profiles of lidar optical data, part 1: theory
Kolgotin, Alexei; Mueller, Detlef; Chemyakin, Eduard V.; Romanov, A. (2016-11-30)Multiwavelength Raman/high spectral resolution lidars that measure backscatter coefficients at 355, 532, and 1064 nm and extinction coefficients at 355 and 532 nm can be used for the retrieval of particle microphysical ... -
Improved identification of the solution space of aerosol microphysical properties derived from the inversion of profiles of lidar optical data, part 2: Simulations with synthetic optical data
Kolgotin, Alexei; Mueller, Detlef; Chemyakin, Eduard V.; Romanov, A. (2016-11-30)We developed a mathematical scheme that allows us to improve retrieval products obtained from the inversion of multiwavelength Raman/HSRL lidar data, commonly dubbed “3 backscatter 2 extinction” (3β 2α) lidar. This scheme ... -
Improved identification of the solution space of aerosol microphysical properties derived from the inversion of profiles of lidar optical data, part 3: Case studies
Kolgotin, Alexei; Mueller, Detlef; Chemyakin, Eduard V.; Romanov, A.; Alehnovich, Valentin (2018-03-27)We conclude our series of publications on the development of the gradient correlation method (GCM) which can be used for an improved stabilization of the solution space of particle microphysical parameters derived from ... -
Information content of multiwavelength lidar data on the base of Eigenvalues analysis
Veselovskii, Igor; Kolgotin, Alexei; Mueller, D.; Whiteman, D. (ESA PUBLICATIONS DIVISION C/O ESTEC, 2004)Multiwavelength Raman lidar technique in combination with sophisticated inversion algorithms has been recognized as a new tool to derive information about microphysical properties of atmospheric aerosols. The optical input ... -
Microphysical particle properties derived from inversion algorithms developed in the framework of EARLINET
Mueller, D.; Boeckmann, C.; Kolgotin, Alexei; Schneidenbach, L.; Chemyakin, Eduard V.; Rosemann, J.; Znak, P.; Romanov, A. (2016-10-12)We present a summary on the current status of two inversion algorithms that are used in EARLINET for the inversion of data collected with EARLINET multiwavelength Raman lidars. These instruments measure backscatter coecients ... -
Retrieval of aerosol parameters from multiwavelength lidar : Investigation of underlying inverse mathematical problem
Chemyakin, Eduard V.; Burton, Sharon P.; Kolgotin, Alexei; Mueller, D.; Hostetler, Chris A.; Ferrare, Richard A. (2016-03-16)We present an investigation of some important mathematical and numerical features related to the retrieval of microphysical parameters (complex refractive index, single-scattering albedo, effective radius, total number, ... -
Synergy of lidar and passive remote sensor data for retrieving profiles of microphysical properties of non-spherical particles
Kolgotin, Alexei; Müller, Detlef; Chemyakin, Eduard; Romanov, Anton (2018-04-13)In this study we explore how the combination of 3 backscatter and 2 extinction lidar data with data that can be collected with ground-based and space-borne passive remote sensors, e.g. phase function coefficients which can ... -
Theory of inversion with two-dimensional regularization: profiles of microphysical particle properties derived from multiwavelength lidar measurements
Kolgotin, Alexei; Mueller, D. (2008-09)We present the theory of inversion with two-dimensional regularization. We use this novel method to retrieve profiles of microphysical properties of atmospheric particles from profiles of optical properties acquired with ... -
Vertical profiles of pure dust and mixed smoke-dust plumes inferred from inversion of multiwavelength Raman/polarization lidar data and comparison to AERONET retrievals and in situ observations
Mueller, D.; Veselovskii, Igor; Kolgotin, Alexei; Tesche, Matthias; Ansmann, Albert; Dubovik, Oleg (2013-05-10)We present for the first time vertical profiles of microphysical properties of pure mineral dust (largely unaffected by any other aerosol types) on the basis of the inversion of optical data collected with multiwavelength ...