Results 31 to 40 of about 430,250 (306)

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

Characteristics of the atmospheric boundary layer and its relation with PM2.5 during haze episodes in winter in the North China Plain

open access: yesAtmospheric Environment, 2020
Interactions between the spatiotemporal distribution of pollutants and the structure of the atmospheric boundary layer were studied using data obtained by GPS (Global Positioning System) sounding balloons in an intensive observation period from December ...
Qianhui Li   +5 more
semanticscholar   +1 more source

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

The CopterSonde: an insight into the development of a smart unmanned aircraft system for atmospheric boundary layer research

open access: yesAtmospheric Measurement Techniques, 2020
. The CopterSonde is an unmanned aircraft system (UAS) developed in house by a team of engineers and meteorologists at the University of Oklahoma. The CopterSonde is an ambitious attempt by the Center for Autonomous Sensing and Sampling to address the ...
Antonio R. Segales   +6 more
semanticscholar   +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

Model Analyses of Changes in Spring Surface Ozone Concentrations over Shandong Province in the Period of 2014–2017

open access: yesAerosol and Air Quality Research, 2022
The concentrations of surface ozone (O3) in eastern China have increased significantly in recent years, resulting in the earlier appearance of more serious O3 pollution.
Jialin Li   +6 more
doaj   +1 more source

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China [PDF]

open access: yesAtmospheric Chemistry and Physics, 2012
Emissions of reactive nitrogen (N) species can affect surrounding ecosystems via atmospheric deposition. However, few long-term and multi-site measurements have focused on both the wet and the dry deposition of individual N species in large areas of ...
Y. P. Pan, Y. S. Wang, G. Q. Tang, D. Wu
doaj   +1 more source

Research Progress on Estimation of the Atmospheric Boundary Layer Height

open access: yesJournal of Meteorological Research, 2020
Atmospheric boundary layer height (ABLH) is an important parameter used to depict characteristics of the planetary boundary layer (PBL) in the lower troposphere. The ABLH is strongly associated with the vertical distributions of heat, mass, and energy in
Hongsheng Zhang   +10 more
semanticscholar   +1 more source

Modeling the Impact of Atmospheric Warming on Staple Crop Growth in China in the 1960s and 2000s

open access: yesAtmosphere, 2020
Responses of crop growth to climate warming are fundamental to future food security. The response of crops to climate change may be subtly different at their growing stages.
Qing Zhang   +4 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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