Annual variations of submicron aerosol fraction as assessed from the data of airborne nephelometric measurements

Panchenko, Mikhail V.; Terpugova, Svetlana A.; Tumakov, A.G.

doi:10.1016/0169-8095(96)00010-5

Cited by 16 publications

(33 citation statements)

References 2 publications

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“…The measurement instrumentation and calibration techniques used here were described in detail in earlier publications (Panchenko et al, 1996(Panchenko et al, , 2000. Here, we give only a brief instrument characterisation.…”

Section: Instrumentation and Measurementsmentioning

confidence: 99%

“…2.2.1) includes a previously developed model of the vertical profiles of the scattering coefficient and the size distribution function of dry aerosol (Panchenko et al, 1998;Panchenko and Terpugova, 2002). At this stage, we use the seasonal average (summer) profiles of the angular scattering coefficient µ (1) dry (45 • ), the relative humidity of air RH and the parameter of condensation activity γ .…”

Section: Scheme Of the Generalised Modelmentioning

confidence: 99%

“…A model of the vertical profiles of the scattering coefficient and particle size distribution function at heights of up to 5 km (Panchenko et al, 1998;Panchenko and Terpugova, 2002) was constructed on the basis of airborne measurements performed from [1986][1987][1988]. The data array consists of more than 600 vertical profiles (the summer subarray includes more than 150 profiles).…”

Section: Instrumentation and Measurementsmentioning

confidence: 99%

“…Then, the volume concentrations V i , i = s, c, were recalculated so that the obtained value µ dry (45 • ) would coincide with the average seasonal value µ (1) dry (45 • ) and so that the ratio between V s and V c would remain constant (Panchenko et al, 1996). Table 1 presents the average scattering coefficients of the aerosol dry matter and relative humidity measured at these altitudes (Panchenko et al, 1996), as well as the distribution parameters R i , ν i and V i adjusted for both particle fractions, i = s, c.…”

Section: Vertical Profiles Of the Aerosol Size Distributionsmentioning

confidence: 99%

“…The presented model of the vertical profiles of all of the required radiative parameters is based on the airborne sensing data of optical and microphysical characteristics of the tropospheric aerosol over West Siberia at altitudes of 0-5 km (Panchenko et al, 1998;Panchenko and Terpugova, 2002) with the season, air mass type and time of day as the input parameters. The aerosol absorption properties are taken into account through simultaneous airborne measurements of the vertical profiles of the scattering coefficient of aerosol dry matter and the mass concentration of black carbon in different seasons (Panchenko et al, 2000;Kozlov et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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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: Instrumentation and Measurementsmentioning

confidence: 99%

Section: Scheme Of the Generalised Modelmentioning

confidence: 99%

Section: Instrumentation and Measurementsmentioning

confidence: 99%

Section: Vertical Profiles Of the Aerosol Size Distributionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2012

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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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Chemical apportionment of aerosol column optical depth off the mid‐Atlantic coast of the United States

Hegg¹,

Livingston²,

Hobbs³

et al. 1997

J. Geophys. Res.

226

131

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Annual variations of submicron aerosol fraction as assessed from the data of airborne nephelometric measurements

Cited by 16 publications

References 2 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

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

Chemical apportionment of aerosol column optical depth off the mid‐Atlantic coast of the United States

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