Simulation of aerosol direct radiative forcing under typical summer conditions of Siberia. Part 1. Method of calculation and choice of input parameters

Zhuravleva, T. B.; Kabanov, Dmitry M.; Sakerin, S. M.; Firsov, K. M.

doi:10.1134/s1024856009010102

Cited by 20 publications

(10 citation statements)

References 21 publications

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“…Undoubtedly, the differences can be more dramatic with increasing AOD. However, according to long-term satellite measurements over West Siberia and near-ground measurements for the city of Tomsk, the respective average AOD values in summer are close to τ a (0.5 µm) ∼ 0.16 Sakerin et al, 2009;Zhuravleva et al, 2009). Thus, in this paper, we do not discuss the change in radiative flux differences caused by AOD variations.…”

Section: The Influence Of Spectral Variations In Aerosol Radiative Pamentioning

confidence: 81%

An empirical model of optical and radiative characteristics of the tropospheric aerosol over West Siberia in summer

et al. 2012

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Abstract. An empirical model of the vertical profiles of aerosol optical characteristics is described. This model was developed based on data acquired from multi-year airborne sensing of optical and microphysical characteristics of the tropospheric aerosol over West Siberia. The main initial characteristics for the creation of the model were measurement data of the vertical profiles of the aerosol angular scattering coefficients in the visible wavelength range, particle size distribution functions and mass concentrations of black carbon (BC). The proposed model allows us to retrieve the aerosol optical and radiative characteristics in the visible and near-IR wavelength range, using the season, air mass type and time of day as input parameters. The columnar single scattering albedo and asymmetry factor of the aerosol scattering phase function, calculated using the average vertical profiles, are in good agreement with data from the AERONET station located in Tomsk.For solar radiative flux calculations, this empirical model has been tested for typical summer conditions. The available experimental database obtained for the regional features of West Siberia and the model developed on this basis are shown to be sufficient for performing these calculations.

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Section: The Influence Of Spectral Variations In Aerosol Radiative Pamentioning

confidence: 81%

An empirical model of optical and radiative characteristics of the tropospheric aerosol over West Siberia in summer

et al. 2012

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“…The broadband fluxes of solar radiation were calculated using a Monte Carlo radiative transfer code which we developed earlier [10,60,61]. Within this code, the downward (↓) and upward (↑) radiative fluxes at a given atmospheric level z are represented as a sum of fluxes in separate spectral intervals:…”

Section: Radiative Transfer Codementioning

confidence: 99%

Impact of the Atmospheric Photochemical Evolution of the Organic Component of Biomass Burning Aerosol on Its Radiative Forcing Efficiency: A Box Model Analysis

et al. 2021

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We present the first box model simulation results aimed at identification of possible effects of the atmospheric photochemical evolution of the organic component of biomass burning (BB) aerosol on the aerosol radiative forcing (ARF) and its efficiency (ARFE). The simulations of the dynamics of the optical characteristics of the organic aerosol (OA) were performed using a simple parameterization developed within the volatility basis set framework and adapted to simulate the multiday BB aerosol evolution in idealized isolated smoke plumes from Siberian fires (without dilution). Our results indicate that the aerosol optical depth can be used as a good proxy for studying the effect of the OA evolution on the ARF, but variations in the scattering and absorbing properties of BB aerosol can also affect its radiative effects, as evidenced by variations in the ARFE. Changes in the single scattering albedo (SSA) and asymmetry factor, which occur as a result of the BB OA photochemical evolution, may either reduce or enhance the ARFE as a result of their competing effects, depending on the initial concentration OA, the ratio of black carbon to OA mass concentrations and the aerosol photochemical age in a complex way. Our simulation results also reveal that (1) the ARFE at the top of the atmosphere is not significantly affected by the OA oxidation processes compared to the ARFE at the bottom of the atmosphere, and (2) the dependence of ARFE in the atmospheric column and on the BB aerosol photochemical ages almost mirrors the corresponding dependence of SSA.

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“…The broadband solar radiative fluxes in the molecular-aerosol, plane-parallel atmosphere were calculated using the Monte Carlo algorithm developed earlier (Zhuravleva, 2008;Zhuravleva et al, 2009). The shortwave spectral interval 0.2-5.0 μm was divided into 31 subdivisions (Slingo, 1989).…”

Section: Long-term Observations Of Vertical Profiles Of Tropospheric mentioning

confidence: 99%

Vertical profiles of optical and microphysical characteristics of tropospheric aerosol from aircraft measurements

Panchenko

Zhuravleva

2016

Light Scattering Reviews 10

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According to the International Panel on Climate Change (IPCC), the current lowest level of scientific understanding in estimates of radiative forcings of different atmospheric constituents is assigned to aerosols (Forster et al., 2007;Hansen et al., 2005), primarily due to a few factors.The first factor is associated with the difficulty in obtaining accurate quantitative information on the required parameters and is caused by (i) strong spatiotemporal variations of the sources and sinks of aerosol particles, (ii) relatively short lifetimes (approximately 7 days) in the troposphere in contrast to greenhouse gases, requiring far more detailed knowledge of their spatiotemporal variations, and (iii) the difficulty in performing synchronous measurements of the scattering and absorbing properties of aerosols for studying their vertical and horizontal distributions.The second complex problem is associated with the multiform impact of atmospheric aerosols on Earth's radiation budget, which is manifested by both direct and indirect aerosol effects (Haywood and Boucher, 2000).The direct aerosol effect is the contribution to the cooling (heating) of the atmosphere by aerosol particles, which scatter (absorb) the solar radiation in the atmosphere. Thus, the net effect depends on the relationship between the scattering and absorbing properties of aerosols in the atmospheric column (Penner et al., 2003;Haywood and Ramaswamy, 1998). The indirect aerosol effects are more complex (Twomey, 1977b;Albrecht, 1989;Johnson et al., 2004). The aerosol particles, acting as condensation nuclei, determine the amount of cloud droplets and their microstructure, thus affecting both the optical properties of clouds and their lifetime in the atmosphere. Low-level clouds, as a rule, play a cooling factor role, while clouds at high altitudes can cause a cooling effect, as well as the intensification of atmospheric heating. Another problem is estimating the radiation effects caused by the presence of absorbing aerosol between cloud particles.Still another aspect of the indirect aerosol effect is associated with the sedimentation and settling of aerosol (primarily black carbon (BC)) particles, causing a change in the reflectance (albedo) of the underlying surface. The effect of this process is most significant for the northern territories, where the supply of absorbSpringer-Verlag Berlin Heidelberg 2016 ©

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Simulation of aerosol direct radiative forcing under typical summer conditions of Siberia. Part 1. Method of calculation and choice of input parameters

Cited by 20 publications

References 21 publications

An empirical model of optical and radiative characteristics of the tropospheric aerosol over West Siberia in summer

An empirical model of optical and radiative characteristics of the tropospheric aerosol over West Siberia in summer

Impact of the Atmospheric Photochemical Evolution of the Organic Component of Biomass Burning Aerosol on Its Radiative Forcing Efficiency: A Box Model Analysis

Vertical profiles of optical and microphysical characteristics of tropospheric aerosol from aircraft measurements

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