Results 21 to 30 of about 216,993 (266)

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

Role of the subtropical westerly jet wave train in the eastward-moving heavy rainfall event over southern China in winter: A case study

open access: yesFrontiers in Earth Science, 2023
Under the wintertime background of westerly flows, heavy rainfall often occurs first over southwestern China and then spreads eastward downstream to southeastern China, causing serious impact on a large scope of southern China.
Juyue Yin   +8 more
doaj   +1 more source

Extreme fluctuations of vertical velocity in the unstable atmospheric surface layer [PDF]

open access: yesNonlinear Processes in Geophysics, 2014
In this paper, we propose a new method to extract the extreme fluctuations of vertical velocity in the unstable atmospheric surface layer. Unlike the commonly used conditional sampling analysis, this method defines a threshold by using a systematical ...
L. Liu, F. Hu, X.-L. Cheng
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

Insights into aerosol chemistry during the 2015 China Victory Day parade: results from simultaneous measurements at ground level and 260 m in Beijing [PDF]

open access: yesAtmospheric Chemistry and Physics, 2017
Strict emission controls were implemented in Beijing and adjacent provinces to ensure good air quality during the 2015 China Victory Day parade. Here, we conducted synchronous measurements of submicron aerosols (PM1) at ground level and 260 m on a ...
J. Zhao   +11 more
doaj   +1 more source

Boundary and interior layers [PDF]

open access: yesPhysics Bulletin, 1982
The second international conference on boundary and interior layers – computational and asymptotic methods, BAIL II – was held at Trinity College, Dublin, Ireland, on 16–18 June 1982, under the auspices of the College's Numerical Analysis Group. It was cosponsored by the American Institute of Aeronautics and Astronautics, the American Meteorological ...
openaire   +1 more source

A Black Carbon‐Tracer Method for Estimating Cooking Organic Aerosol From Aerosol Mass Spectrometer Measurements

open access: yesGeophysical Research Letters, 2019
Cooking organic aerosol (COA) constitutes a considerable fraction of organic aerosol (OA) in urban environments, yet it is often challenging to resolve COA in summer through positive matrix factorization of unit mass resolution spectra of OA from aerosol
Yao He   +13 more
doaj   +1 more source

Effects of fertilization and stand age on N2O and NO emissions from tea plantations: a site-scale study in a subtropical region using a modified biogeochemical model [PDF]

open access: yesAtmospheric Chemistry and Physics, 2020
To meet increasing demands, tea plantations are rapidly expanding in China. Although the emissions of nitrous oxide (N2O) and nitric oxide (NO) from tea plantations may be substantially influenced by soil pH reduction and intensive nitrogen fertilization,
W. Zhang   +10 more
doaj   +1 more source

Impact of emission controls on air quality in Beijing during APEC 2014: lidar ceilometer observations [PDF]

open access: yesAtmospheric Chemistry and Physics, 2015
The implementation of emission reductions during the 2014 Asia-Pacific Economic Cooperation (APEC) summit provides a valuable opportunity to study air pollution in Beijing.
G. Tang   +7 more
doaj   +1 more source

Diagnosis of a Regional Thundersnow in Beijing, Tianjin and Hebei in February 2024

open access: yes应用气象学报
The generation mechanism of extreme snowfall and convective snowfall in Beijing-Tianjin-Hebei region of China from 20 February to 21 February in 2024 are analyzed with high-resolution observations and the fifth-generation European Centre for Medium-Range
Suo Chunnan   +6 more
doaj   +1 more source

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