Results 41 to 50 of about 18,582,204 (254)

From direct emission factors to inverse and indirect impact factors of road traffic: influence of emerging and unregulated pollutants [PDF]

Atmospheric Chemistry and Physics
Even though emissions regulations have successfully reduced concentrations of some road traffic-originated air pollutants, road traffic is still an important source of many unregulated emerging pollutants such as semi-volatile ultrafine particles, non ...
L. K. Savolainen, T. Lepistö, H. Hellén, H. Lintusaari, M. Jäppi, J. V. Niemi, K. Teinilä, M. Aurela, M. Lampimäki, A. Kousa, J. Lampilahti, K. Lehtipalo, K. Lehtipalo, T. Petäjä, M. Dal Maso, H. E. Manninen, H. Timonen, T. Rönkkö   +17 more
doaj   +1 more source

Widespread and persistent ozone pollution in eastern China during the non-winter season of 2015: observations and source attributions [PDF]

Atmospheric Chemistry and Physics, 2017
Rapid growth of industrialization, transportation, and urbanization has caused increasing emissions of ozone (O3) precursors recently, enhancing the O3 formation in eastern China.
G. Li, N. Bei, J. Cao, J. Wu, X. Long, T. Feng, W. Dai, S. Liu, Q. Zhang, X. Tie   +9 more
doaj   +1 more source

Parameterization of the Aerosol Upscatter Fraction as Function of the Backscatter Fraction and Their Relationships to the Asymmetry Parameter for Radiative Transfer Calculations

Atmosphere, 2017
Simple analytical approximations for aerosol radiative forcing generally contain the aerosol upscatter fraction (the fraction of scattered light that is scattered into the upper hemisphere), while ambient measurements generally yield the backscatter ...
Hans Moosmüller, John A. Ogren
doaj   +1 more source

Deposition potential of 0.003–10 µm ambient particles in the humidified human respiratory tract: Contribution of new particle formation events in Beijing

Ecotoxicology and Environmental Safety, 2022
Ultrafine particles (UFPs) usually explosive growth during new particle formation (NPF) events. However, the risk of exposure to UFPs on NPF days has been ignored due to the prevalence of mass-based air quality standards.
Li Ma, Ying Zhang, Zhuohui Lin, Ying Zhou, Chao Yan, Yusheng Zhang, Wenshuo Zhou, Wei Ma, Chenjie Hua, Xiaoxiao Li, Chenjuan Deng, Yu Qi, Lubna Dada, Hongyan Li, Federico Bianchi, Tuukka Petäjä, Juha Kangasluoma, Jingkun Jiang, Sijin Liu, Tareq Hussein, Markku Kulmala, Yongchun Liu   +21 more
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Variation of size-segregated particle number concentrations in wintertime Beijing [PDF]

Atmospheric Chemistry and Physics, 2020
The spatial and temporal variability of the number size distribution of aerosol particles is an indicator of the dynamic behavior of Beijing's atmospheric pollution cocktail. This variation reflects the strength of different primary and secondary sources,
Y. Zhou, L. Dada, L. Dada, Y. Liu, Y. Fu, J. Kangasluoma, J. Kangasluoma, T. Chan, T. Chan, C. Yan, B. Chu, K. R. Daellenbach, K. R. Daellenbach, F. Bianchi, T. V. Kokkonen, Y. Liu, J. Kujansuu, J. Kujansuu, V.-M. Kerminen, T. Petäjä, L. Wang, J. Jiang, M. Kulmala, M. Kulmala   +23 more
doaj   +1 more source

Computational Modeling Studies of Fundamental Aerosol-Cloud Interactions [PDF]

, 2012
Basic questions regarding the interaction between changes in human activity and the atmosphere remain unanswered. Among these, the link between aerosol particles and cloud formation and development, especially in an altered climate, is a large point of ...
Lebo, Zachary John
core   +1 more source

A possible pathway for rapid growth of sulfate during haze days in China [PDF]

Atmospheric Chemistry and Physics, 2017
Rapid industrialization and urbanization have caused frequent occurrence of haze in China during wintertime in recent years. The sulfate aerosol is one of the most important components of fine particles (PM2.
G. Li, N. Bei, J. Cao, R. Huang, J. Wu, T. Feng, Y. Wang, S. Liu, Q. Zhang, X. Tie, L. T. Molina   +10 more
doaj   +1 more source

Measurement report: Size-resolved and seasonal variations in aerosol hygroscopicity dominated by organic formation and aging: insights from a year-long observation in Nanjing [PDF]

Atmospheric Chemistry and Physics
Aerosol hygroscopicity plays a significant role in atmospheric chemistry, radiation, and climate effects. While previous studies have investigated regional differences in aerosol hygroscopicity, long-term observational studies focusing on seasonal ...
J. Zhang, Y. Wang, J. Xu, X. Zuo, C. Lu, B. Zhu, Y. Yang, X. Yan, Y. Sun   +8 more
doaj   +1 more source

Hygroscopic growth and evaporation in an aerosol with boundary heat and mass transfer

, 2007
This study demonstrates an experimental method for using temperature measurements as a means for validating computations of particle size distribution in a growing or evaporating high-concentration aerosol flowing in a tube with wall heat and mass ...
Saleh R., Shihadeh A.
core   +1 more source

A Review of More than 20 Years of Aerosol Observation at the High Altitude Research Station Jungfraujoch, Switzerland (3580 m asl) [PDF]

, 2016
Among the worldwide existing long-term aerosol monitoring sites, the Jungfraujoch (JFJ) belongs to the category where both free tropospheric (FT) conditions and influence from planetary boundary layer (PBL) injections can be observed.
Gaeggeler, Heinz W., Bukowiecki, Nicolas, Gäggeler, Heinz W., Zieger, Paul, Herrmann, Erik, Baltensperger, Urs, Weingartner, Ernest, Gysel, Martin, Steinbacher, Martin, Coen, Martine Collaud, Bukowiecki, Nicolas (author), Baltensperger, Urs (author), Collaud Coen, Martine (author), Gysel, Martin (author), Weingartner, Ernest (author), Zieger, Paul (author), Herrmann, Erik (author), Gäggeler, Heinz W. (author), Coen, Martine Collaud (author), Steinbacher, Martin (author)   +19 more
core   +1 more source