Results 11 to 20 of about 304,247 (349)

Aerosol composition, oxidation properties, and sources in Beijing: results from the 2014 Asia-Pacific Economic Cooperation summit study [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
The mitigation of air pollution in megacities remains a great challenge because of the complex sources and formation mechanisms of aerosol particles. The 2014 Asia-Pacific Economic Cooperation (APEC) summit in Beijing serves as a unique experiment to ...
W. Q. Xu   +12 more
doaj   +1 more source

Quantifying the Source Contributions to Poor Atmospheric Visibility in Winter over the Central Plains Economic Region in China

open access: yesAtmosphere, 2022
The Central Plains Economic Region (CPER) is one of the most polluted regions in China. Air pollution has caused visibility degradation due to the light extinction of fine particles (PM2.5).
Huiyun Du   +5 more
doaj   +1 more source

Evaluation of Ozone Formation Potential of Formaldehyde Using Smog Chamber Data

open access: yesAerosol and Air Quality Research, 2023
Formaldehyde (HCHO) is one of the important O3 precursors in the atmospheric environment, but the mechanism for HCHO photochemical reactions is not very clear now. In the present study, the effects of relative humidity (RH) and initial VOC/NOx ratio (RCN)
Hailiang Zhang, Yongfu Xu, Long Jia
doaj   +1 more source

Turbulent helium gas cell as a new paradigm of daily meteorological fluctuations? [PDF]

open access: yes, 1997
We compare the spectral properties of long meteorological temperature records with laboratory measurements in small convection cells. Surprisingly, the atmospheric boundary layer sampled on a daily scale shares the statistical properties of temperature ...
Harnos, A., Jánosi, I. M., Vattay, G.
core   +2 more sources

The moist boundary layer under a mid-latitude weather system [PDF]

open access: yes, 2010
Mid-latitude weather systems are key contributors to the transport of atmospheric water vapour, but less is known about the role of the boundary layer in this transport.
Beare, R.J.   +4 more
core   +1 more source

An improved process-oriented hydro-biogeochemical model for simulating dynamic fluxes of methane and nitrous oxide in alpine ecosystems with seasonally frozen soils [PDF]

open access: yesBiogeosciences, 2021
The hydro-biogeochemical model Catchment Nutrient Management Model – DeNitrification-DeComposition (CNMM-DNDC) was established to simultaneously quantify ecosystem productivity and losses of nitrogen and carbon at the site or catchment scale.
W. Zhang   +14 more
doaj   +1 more source

Modeling chemistry in and above snow at Summit, Greenland – Part 1: Model description and results [PDF]

open access: yes, 2011
Sun-lit snow is increasingly recognized as a chemical reactor that plays an active role in uptake, transformation, and release of atmospheric trace gases.
Dibb, JE   +6 more
core   +3 more sources

Ozone weekend effects in the Beijing–Tianjin–Hebei metropolitan area, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
The ozone weekend effect (OWE) was first investigated in the metropolitan area of Beijing–Tianjin–Hebei (BTH), China, using in situ measurements from the Atmospheric Environment Monitoring Network from July 2009 to August 2011.
Y. H. Wang   +11 more
doaj   +1 more source

Impacts of an unknown daytime HONO source on the mixing ratio and budget of HONO, and hydroxyl, hydroperoxyl, and organic peroxy radicals, in the coastal regions of China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
Many field experiments have found high nitrous acid (HONO) mixing ratios in both urban and rural areas during daytime, but these high daytime HONO mixing ratios cannot be explained well by gas-phase production, HONO emissions, and nighttime hydrolysis ...
Y. Tang   +6 more
doaj   +1 more source

Chemical characterization and source identification of PM2.5 at multiple sites in the Beijing–Tianjin–Hebei region, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2017
The simultaneous observation and analysis of atmospheric fine particles (PM2.5) on a regional scale is an important approach to develop control strategies for haze pollution.
X. Huang   +13 more
doaj   +1 more source

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