Results 31 to 40 of about 1,285,093 (191)

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

S-band and X-band Radar Observation Characteristics of EF2 Tornado at Qingyuan of Baoding in 2021

open access: yes应用气象学报
Using multiple observations such as S-band radar (SPOL) in Shijiazhuang, X-band phased array radar (XPAR) in Xiong'an, and ground-based encrypted automatic stations, detection features and evolutions of EF2 tornado at Donglü Village, Qingyuan District of
Chen Xuejiao   +6 more
doaj   +1 more source

The asymptotic equivalence of fixed heat flux and fixed temperature thermal boundary conditions for rapidly rotating convection

open access: yes, 2015
The influence of fixed temperature and fixed heat flux thermal boundary conditions on rapidly rotating convection in the plane layer geometry is investigated for the case of stress-free mechanical boundary conditions. It is shown that whereas the leading
Calkins, Michael A.   +5 more
core   +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

Spectral analysis of boundary layers in Rayleigh-Benard convection

open access: yes, 2007
A combined experimental and numerical study of the boundary layer in a 4:1 aspect-ratio Rayleigh-B\'{e}nard cell over a four-decade range of Rayleigh numbers has been undertaken aimed at gaining a better insight into the character of the boundary layers.
F. M. White   +6 more
core   +2 more sources

Heavy Rainfall Events in Southern China Associated with Tropical Cyclones in the Bay of Bengal: A Case Study

open access: yesAtmosphere, 2019
We use a case study to show that a continuous heavy rainfall process in southern China was closely related to tropical cyclone activity in the Bay of Bengal.
Junpeng Yuan   +6 more
doaj   +1 more source

Size-resolved source apportionment of particulate matter in urban Beijing during haze and non-haze episodes [PDF]

open access: yesAtmospheric Chemistry and Physics, 2016
Additional size-resolved chemical information is needed before the physicochemical characteristics and sources of airborne particles can be understood; however, this information remains unavailable in most regions of China due to lacking measurement ...
S. L. Tian, Y. P. Pan, Y. S. Wang
doaj   +1 more source

Three dimensional laminar boundary layer with small cross-flow [PDF]

open access: yes, 1954
Important problems involving three-dimensional boundary layer occur in almost all internal and external aerodynamic configurations. For many of these, the flow outside the boundary layer may be resolved into a large principal component and a small ...
Mager, Artur
core   +1 more source

Regional Rainfall Damage Functions to Estimate Direct Economic Losses in Rainstorms: A Case Study of the 2016 Extreme Rainfall Event in Hebei Province of China

open access: yesInternational Journal of Disaster Risk Science
Developing a regional damage function to quickly estimate direct economic losses (DELs) caused by heavy rain and floods is crucial for providing scientific supports in effective disaster response and risk reduction.
Xiaojuan Chen   +4 more
doaj   +1 more source

Analysis on the Cause of Cold and Warm Transition in Beijing- Tianjin-Hebei during November-December 2022

open access: yesGaoyuan qixiang
During November-December of 2022, the climate of Beijing-Tianjin-Hebei (BTH) showed significant cold and warm transition, and the average air temperature difference between November and December was 10.6 °C, ranked first with 1971 and 1980 since 1961 ...
Xuxu GAO, Shaojing CHE, Haoyu DU
doaj   +1 more source

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