Gotowe bibliografie tematyczne / Absorption Ångstrom exponent

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Gotowa bibliografia na temat „Absorption Ångstrom exponent”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Absorption Ångstrom exponent"

Cheng, Yi, Junfang Mao, Zhe Bai, et al. "The Significant Contribution of Polycyclic Aromatic Nitrogen Heterocycles to Light Absorption in the Winter North China Plain." Sustainability 15, no. 11 (2023): 8568. http://dx.doi.org/10.3390/su15118568.

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By quantifying the absorption of black carbon (BC), brown carbon (BrC) and the lensing effect, we found that BrC dominates the total absorption at 450 nm, and the largest absorption contribution proportion of BrC could reach 78.3% during heavy pollution. The average absorption enhancement (Eabs) at 530 nm was only 1.38, indicating that BC is not coated well here. The average value of the absorption Ångstrom exponent (AAE) between 450 nm and 530 nm was 5.3, suggesting a high concentration of BrC in Wangdu. CHN+ was the greatest contributor to the light absorption of molecules detected in MSOC w

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Zhang, Xiaolin, Mao Mao, Yan Yin, and Shihao Tang. "The absorption Ångstrom exponent of black carbon with brown coatings: effects of aerosol microphysics and parameterization." Atmospheric Chemistry and Physics 20, no. 16 (2020): 9701–11. http://dx.doi.org/10.5194/acp-20-9701-2020.

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Abstract. The aerosol absorption Ångstrom exponent (AAE) is a crucial optical parameter for apportionment and characterization. Due to considerable inconsistences associated with observations, numerical research is a powerful means to give a better understanding of the AAE of aged black carbon (BC) aerosols. Numerical studies of the AAE of polydisperse BC aggregates with brown coatings using the exact multiple-sphere T-matrix method (MSTM) are performed. The objective of the study is to thoroughly assess the AAE of coated BC influenced by their observation-based detailed microphysics and then

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Lack, D. A., R. Bahreni, J. M. Langridge, J. B. Gilman, and A. M. Middlebrook. "Brown carbon absorption linked to organic mass tracers in biomass burning particles." Atmospheric Chemistry and Physics Discussions 12, no. 11 (2012): 29129–46. http://dx.doi.org/10.5194/acpd-12-29129-2012.

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Abstract. Traditional gas and particle phase chemical markers used to identify the presence of biomass burning (BB) emissions were measured for a large forest fire near Boulder, Colorado. Correlation of the mass spectroscopic marker of levoglucosan (m/z 60) with measured particle light absorption properties found no link at 532 nm, and a strong correlation at 404 nm. Non-black carbon (BC) absorption at 404 nm was well correlated to the ratio of the mass fractions of particulate organic matter (POM) that were m/z 60 (f60) to m/z 44 (f44). The f60 to f44 ratio did not fully explain the variabili

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Doherty, S. J., S. G. Warren, T. C. Grenfell, A. D. Clarke, and R. E. Brandt. "Light-absorbing impurities in Arctic snow." Atmospheric Chemistry and Physics 10, no. 23 (2010): 11647–80. http://dx.doi.org/10.5194/acp-10-11647-2010.

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Abstract. Absorption of radiation by ice is extremely weak at visible and near-ultraviolet wavelengths, so small amounts of light-absorbing impurities in snow can dominate the absorption of solar radiation at these wavelengths, reducing the albedo relative to that of pure snow, contributing to the surface energy budget and leading to earlier snowmelt. In this study Arctic snow is surveyed for its content of light-absorbing impurities, expanding and updating the 1983–1984 survey of Clarke and Noone. Samples were collected in Alaska, Canada, Greenland, Svalbard, Norway, Russia, and the Arctic Oc

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Lack, D. A., R. Bahreini, J. M. Langridge, J. B. Gilman, and A. M. Middlebrook. "Brown carbon absorption linked to organic mass tracers in biomass burning particles." Atmospheric Chemistry and Physics 13, no. 5 (2013): 2415–22. http://dx.doi.org/10.5194/acp-13-2415-2013.

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Abstract. Traditional gas and particle phase chemical markers used to identify the presence of biomass burning (BB) emissions were measured for a large forest fire near Boulder, Colorado. Correlation of the organic matter mass spectroscopic m/z 60 with measured particle light absorption properties found no link at 532 nm, and a strong correlation at 404 nm. Non-black carbon absorption at 404 nm was well correlated to the ratio of the mass fractions of particulate organic matter (POM) that was m/z 60 (f60) to m/z 44 (f44). The f60 to f44 ratio did not fully explain the variability in non-BC abs

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Doherty, S. J., S. G. Warren, T. C. Grenfell, A. D. Clarke, and R. E. Brandt. "Light-absorbing impurities in Arctic snow." Atmospheric Chemistry and Physics Discussions 10, no. 8 (2010): 18807–78. http://dx.doi.org/10.5194/acpd-10-18807-2010.

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Lara, Pamela, Rosa M. Fitzgerald, Nakul N. Karle, et al. "Winter and Wildfire Season Optical Characterization of Black and Brown Carbon in the El Paso-Ciudad Juárez Airshed." Atmosphere 13, no. 8 (2022): 1201. http://dx.doi.org/10.3390/atmos13081201.

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Black (EBC) and Brown (BrC) Carbon are ubiquitous constituents of atmospheric particulate matter that affect people’s health, disrupt ecosystems, and modulate local and global climate. Tracking the local deposition and sources of these aerosol particles is essential to better understanding their multidimensional environmental impact. The main goal of the current study is to measure the absorption coefficient (Babs) of particles within the Planetary Boundary Layer (PBL) of the El Paso (US)–Ciudad Juárez (Mexico) airshed and assess the contribution of black and brown carbon particles to the opti

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Liu, J., M. Bergin, H. Guo, et al. "Size-resolved measurements of brown carbon and estimates of their contribution to ambient fine particle light absorption based on water and methanol extracts." Atmospheric Chemistry and Physics Discussions 13, no. 7 (2013): 18233–76. http://dx.doi.org/10.5194/acpd-13-18233-2013.

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Abstract. Light absorbing organic carbon, often termed brown carbon, has the potential to significantly contribute to the visible light absorption budget, particularly at shorter wavelengths. Currently, the relative contributions of particulate brown carbon to light absorption, as well as the sources of brown carbon are poorly understood. With this in mind field measurements were made at both urban (Atlanta), and rural (Yorkville) sites in Georgia. Measurements in Atlanta were made at both a central site and a road side site adjacent to a main highway near the city center. Fine particle brown

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Markowicz, Krzysztof M., Iwona S. Stachlewska, Olga Zawadzka-Manko, et al. "A Decade of Poland-AOD Aerosol Research Network Observations." Atmosphere 12, no. 12 (2021): 1583. http://dx.doi.org/10.3390/atmos12121583.

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The Poland-AOD aerosol research network was established in 2011 to improve aerosol–climate interaction knowledge and provide a real-time and historical, comprehensive, and quantitative database for the aerosol optical properties distribution over Poland. The network consists of research institutions and private owners operating 10 measurement stations and an organization responsible for aerosol model transport simulations. Poland-AOD collaboration provides observations of spectral aerosol optical depth (AOD), Ångstrom Exponent (AE), incoming shortwave (SW) and longwave (LW) radiation fluxes, v

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Rizzo, L. V., A. L. Correia, P. Artaxo, A. S. Procópio, and M. O. Andreae. "Spectral dependence of aerosol light absorption over the Amazon Basin." Atmospheric Chemistry and Physics 11, no. 17 (2011): 8899–912. http://dx.doi.org/10.5194/acp-11-8899-2011.

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Abstract. In this study, we examine the spectral dependence of aerosol absorption at different sites and seasons in the Amazon Basin. The analysis is based on measurements performed during three intensive field experiments at a pasture site (Fazenda Nossa Senhora, Rondônia) and at a primary forest site (Cuieiras Reserve, Amazonas), from 1999 to 2004. Aerosol absorption spectra were measured using two Aethalometers: a 7-wavelength Aethalometer (AE30) that covers the visible (VIS) to near-infrared (NIR) spectral range, and a 2-wavelength Aethalometer (AE20) that measures absorption in the UV and

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Rozprawy doktorskie na temat "Absorption Ångstrom exponent"

Hu, Jason. "Seasonality and sources of light-absorbing aerosols at Summit, Greenland." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53838.

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The Greenland ice sheet (GIS) is a key component of the warming Arctic climate, having the potential to dramatically influence sea level through melting. Light-absorbing aerosols are thought to be significant contributors to warming in the Arctic, because of their effect on the radiation balance through both aerosol absorption in the atmosphere as well as absorption in surface snow after particulate deposition. At this time it is not possible to estimate the impact of aerosol absorption on the radiation balance over Greenland due to the lack of in-situ measurements. Here, we present time serie

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Książki na temat "Absorption Ångstrom exponent"

Chance, Kelly, and Randall V. Martin. Atmospheric Scattering. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199662104.003.0007.

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This chapter describes elastic scattering events, where the wavelength of the scattered light is unchanged from that of the incident light and conservative scattering, scattering without absorption, sometimes closely approximated in clouds. The scattering regime, scattering versus wavelengths and scatterer size are introduced. Polarization in scattering is described by the Stokes vector and the polarization ellipse. Molecular (Rayleigh) scattering is presented and its atmospherically-important inelastic component, Raman scattering (the Ring effect) quantified. Mie scattering for spherical part

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