Results 1 to 10 of about 7,352 (265)

Planetary Boundary-Layer Modelling and Tall Building Design. [PDF]

open access: yesBoundary Layer Meteorol, 2015
Characteristics of flow in the planetary boundary layer (PBL) strongly affect the design of tall structures. PBL modelling in building codes, based as it is on empirical data from the 1960s and 1970s, differs significantly from contemporary PBL models, which account for both "neutral" flows, and "conventionally neutral" flows.
Simiu E, Shi L, Yeo D.
europepmc   +4 more sources

A two-way coupled regional urban–street network air quality model system for Beijing, China [PDF]

open access: yesGeoscientific Model Development, 2023
Owing to the substantial traffic emissions in urban areas, especially near road areas, the concentrations of pollutants, such as ozone (O3) and its precursors, have a large difference compared to regional averages, and their distributions cannot be ...
T. Wang   +13 more
doaj   +1 more source

Sources and processes of water-soluble and water-insoluble organic aerosol in cold season in Beijing, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2022
Water-soluble and water-insoluble organic aerosol (WSOA and WIOA) constitute a large fraction of fine particles in winter in northern China, yet our understanding of their sources and processes are still limited.
Z. Zhang   +26 more
doaj   +1 more source

Mixing state and effective density of aerosol particles during the Beijing 2022 Olympic Winter Games [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
Mixing state and density are two key parameters of aerosol particles affecting their impacts on radiative forcing and human health. Here a single-particle aerosol mass spectrometer in tandem with a differential mobility analyzer and an aerodynamic ...
A. Du   +18 more
doaj   +1 more source

The impact threshold of the aerosol radiative forcing on the boundary layer structure in the pollution region [PDF]

open access: yesAtmospheric Chemistry and Physics, 2021
Recently, there has been increasing interest in the relation between particulate matter (PM) pollution and atmospheric-boundary-layer (ABL) structure. This study aimed to qualitatively assess the interaction between PM and ABL structure in essence and ...
D. Zhao   +14 more
doaj   +1 more source

Mixing state of refractory black carbon in fog and haze at rural sites in winter on the North China Plain [PDF]

open access: yesAtmospheric Chemistry and Physics, 2021
The variability of the mixing state of refractory black carbon aerosol (rBC) and the corresponding complicated light absorption capacity imposes great uncertainty for its climate forcing assessment.
Y. Zhang   +30 more
doaj   +1 more source

Mass spectral characterization of primary emissions and implications in source apportionment of organic aerosol [PDF]

open access: yesAtmospheric Measurement Techniques, 2020
Source apportionment of organic aerosol (OA) from aerosol mass spectrometer (AMS) or aerosol chemical speciation monitor (ACSM) measurements relies largely upon mass spectral profiles from different source emissions.
W. Xu   +23 more
doaj   +1 more source

Measurement report: Long-term changes in black carbon and aerosol optical properties from 2012 to 2020 in Beijing, China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2022
Atmospheric aerosols play an important role in the radiation balance of the earth–atmosphere system. However, our knowledge of the long-term changes in equivalent black carbon (eBC) and aerosol optical properties in China is very limited. Here we analyze
J. Sun   +22 more
doaj   +1 more source

Fine particle characterization in a coastal city in China: composition, sources, and impacts of industrial emissions [PDF]

open access: yesAtmospheric Chemistry and Physics, 2020
Aerosol composition and sources have been extensively studied in developed regions in China. However, aerosol chemistry in coastal regions of eastern China with high industrial emissions remains poorly characterized.
L. Lei   +21 more
doaj   +1 more source

Update of a biogeochemical model with process-based algorithms to predict ammonia volatilization from fertilized cultivated uplands and rice paddy fields [PDF]

open access: yesBiogeosciences, 2022
Accurate simulation of ammonia (NH3) volatilization from fertilized croplands is crucial to enhancing fertilizer-use efficiency and alleviating environmental pollution.
S. Li   +10 more
doaj   +1 more source

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