Results 31 to 40 of about 73,958 (307)

Development and characterization of a high-performance single-particle aerosol mass spectrometer (HP-SPAMS) [PDF]

Atmospheric Measurement Techniques
This study describes a high-performance single-particle mass spectrometry (HP-SPAMS) design in detail. The comprehensive improvements in the injection system, optical sizing system, mass spectrometry, and data acquisition system have improved particle ...
X. Du, X. Du, Q. Xie, Q. Xie, Q. Huang, Q. Huang, X. Li, X. Li, J. Yang, Z. Hou, J. Wang, X. Li, X. Li, Z. Zhou, Z. Zhou, Z. Huang, Z. Huang, W. Gao, W. Gao, L. Li, L. Li   +20 more
doaj   +1 more source

Estimation of the share of artificial Po-210 contamination in the ambient air [PDF]

Archives of Environmental Protection, 2021
In this work, source apportionment for unsupported 210Po was conducted. The activity size distributions of both supported and unsupported 210Po in urban aerosols were measured from February to December 2019.
Magdalena Długosz-Lisiecka, Karolina Nowak   +1 more
doaj   +1 more source

Source apportionment and sensitivity analysis: two methodologies with two different purposes [PDF]

Geoscientific Model Development, 2017
This work reviews the existing methodologies for source apportionment and sensitivity analysis to identify key differences and stress their implicit limitations.
A. Clappier, C. A. Belis, D. Pernigotti, P. Thunis   +3 more
doaj   +1 more source

Photochemical grid model implementation and application of VOC, NO_x, and O₃ source apportionment [PDF]

Geoscientific Model Development, 2015
For the purposes of developing optimal emissions control strategies, efficient approaches are needed to identify the major sources or groups of sources that contribute to elevated ozone (O3) concentrations.
R. H. F. Kwok, K. R. Baker, S. L. Napelenok, G. S. Tonnesen   +3 more
doaj   +1 more source

An extended Bayesian sediment fingerprinting mixing model for the full Bayes treatment of geochemical uncertainties [PDF]

, 2017
Recent advances in sediment fingerprinting research have seen Bayesian mixing models being increasingly employed as an effective method to coherently translate component uncertainties into source apportionment results.
Abban, Alewell, Belmont, Blake, Clarke, Collins, Collins, Collins, Cooper, Cooper, Cooper, Cooper, D'Haen, Egozcue, Fox, Gelfand, Guzmán, Haddadchi, Hoffman, Hopkins, Koiter, Koiter, Kraushaar, Krueger, Laceby, Laceby, Lamba, Martínez-Carreras, Massoudieh, Nosrati, Palazón, Parnell, Pulley, Pulley, Reiffarth, Rowan, Sherriff, Small, Smith, Smith, Stewart, Vale, Van den Meersche, Walling, Walling, Walling, Ward   +46 more
core   +1 more source

Are contributions of emissions to ozone a matter of scale? [PDF]

Geoscientific Model Development, 2020
Anthropogenic and natural emissions influence the tropospheric ozone budget, thereby affecting air quality and climate. To study the influence of different emission sources on the ozone budget, often source apportionment studies with a tagged tracer ...
M. Mertens, A. Kerkweg, A. Kerkweg, V. Grewe, V. Grewe, P. Jöckel, R. Sausen   +6 more
doaj   +1 more source

The air quality impact of cordon and distance based road user charging: an empirical study of Leeds, U.K [PDF]

, 2005
Traffic assignment, pollutant emission and dispersion models were applied to a major UK city so as to assess the air quality impacts of five road pricing schemes.
Milne, D.S., Mitchell, G., Namdeo, A.K.
core   +1 more source

Source identification of the elemental fraction of particulate matter using size segregated, highly time-resolved data and an optimized source apportionment approach

Atmospheric Environment: X, 2022
Source emissions with high covariance degrade the performance of multivariate models, and often highly-time resolved data is needed to accurately extract the contribution of different emissions. Here, we use highly time-resolved size segregated elemental
M. Manousakas, M. Furger, K.R. Daellenbach, F. Canonaco, G. Chen, A. Tobler, P. Rai, L. Qi, A.H. Tremper, D. Green, C. Hueglin, J.G. Slowik, I. El Haddad, A.S.H. Prevot   +13 more
doaj   +1 more source

C1-C8 volatile organic compounds in the atmosphere of Hong Kong: Overview of atmospheric processing and source apportionment [PDF]

, 2007
We present measurements of C1-C8 volatile organic compounds (VOCs) at four sites ranging from urban to rural areas in Hong Kong from September 2002 to August 2003. A total of 248 ambient VOC samples were collected.
Barletta, B, Blake, DR, Guo, H, Meinardi, S, Simpson, IJ, So, KL   +5 more
core   +1 more source

Quantifying black carbon light absorption enhancement with a novel statistical approach [PDF]

Atmospheric Chemistry and Physics, 2018
Black carbon (BC) particles in the atmosphere can absorb more light when coated by non-absorbing or weakly absorbing materials during atmospheric aging, due to the lensing effect.
C. Wu, C. Wu, D. Wu, D. Wu, D. Wu, J. Z. Yu, J. Z. Yu, J. Z. Yu   +7 more
doaj   +1 more source