搜索结果: 1-15 共查到“知识库 大气科学 Regions”相关记录20条 . 查询时间(0.14 秒)
The relative importance of various source regions on East Asian surface ozone
source regions East Asian surface ozone
font style='font-size:12px;'>
2010/12/20
We estimated the source-receptor relationship for surface O3 in East Asia during the early 2000s using a method that tags O3 tracers according to their region of chemical production (tagged tracer met...
Multi-annual changes of NOx emissions in megacity regions: nonlinear trend analysis of satellite measurement based estimates
NOx emissions megacity regions nonlinear trend analysis satellite measurement
font style='font-size:12px;'>
2010/9/21
Hazardous impact of air pollutant emissions from megacities on atmospheric composition on regional and global scales is currently an important issue in atmospheric research. However, the quantificatio...
Impact of dust on tropospheric chemistry over polluted regions: a case study of the Beijing megacity
dust tropospheric chemistry polluted regions the Beijing megacity
font style='font-size:12px;'>
2010/8/12
The box model MECCA (Module Efficiently Calculating the Chemistry of the Atmosphere) is extended by incorporating detailed heterogeneous chemistry occurring on mineral aerosol surfaces. The model is u...
Study on the impact of sudden stratosphere warming in the upper mesosphere-lower thermosphere regions using satellite and HF radar measurements
sudden stratosphere warming the upper mesosphere-lower thermosphere regions satellite and HF radar measurements
font style='font-size:12px;'>
2010/8/12
The occurrence of a sudden stratospheric warming (SSW) excites disturbances in the mesosphere-lower thermospheric (MLT) wind and temperature. Here, we have examined the high frequency (HF) radar wind ...
Extensive reduction of surface UV radiation since 1750 in world's populated regions
Extensive reduction surface UV radiation world's populated regions
font style='font-size:12px;'>
2009/11/9
Human activity influences a wide range of components that affect the surface UV radiation levels, among them ozone at high latitudes. We calculate the effect of human-induced changes in the surface er...
Influence of line mixing on the retrievals of atmospheric CO2 from spectra in the 1.6 and 2.1 μm regions
line mixing atmospheric CO2 spectra
font style='font-size:12px;'>
2009/10/9
We present the first study of the influence of line mixing among CO2 lines on the remote sensing retrieval of atmospheric carbon dioxide. This is done in the bands near 1.6 and 2.1 μm which will be us...
Source regions of some persistent organic pollutants measured in the atmosphere at Birkenes, Norway
persistent organic pollutants atmosphere Birkenes Norway
font style='font-size:12px;'>
2009/9/14
A key feature of POPs (Persistent Organic Pollutants) is their potential for long-range atmospheric transport. In order to better understand and predict atmospheric source-receptor relationships of PO...
Railway Construction Techniques Adapting to Climate Warming in Permafrost Regions
Qinghai-Tibet Railway climate warming railway construction
font style='font-size:12px;'>
2009/8/28
The climate warming, which has an evident effect on the warm/ice-rich permafrost, should be considered in the engineering design of the Qinghai-Tibet Railway in permafrost areas. Based on the rule men...
Organic composition of single and submicron particles in different regions of western North America and the eastern Pacific during INTEX-B 2006
single and submicron particles western North America eastern Pacific INTEX-B 2006
font style='font-size:12px;'>
2009/8/7
Single particles were collected from an aircraft platform as part of the Intercontinental Chemical Transport Experiment – Phase B (INTEX-B) conducted over the eastern Pacific and western North America...
Physical interpretation of the spectral radiative signature in the transition zone between cloud-free and cloudy regions
Physical interpretation spectral radiative signature transition zone cloud-free and cloudy regions
font style='font-size:12px;'>
2009/3/13
One-second-resolution zenith radiance measurements from the Atmospheric Radiation Measurement program's new shortwave spectrometer (SWS) provide a unique opportunity to analyze the transition zone bet...
Correlation between cloud condensation nuclei concentration and aerosol optical thickness in remote and polluted regions
cloud condensation nuclei concentration aerosol optical thickness polluted regions
font style='font-size:12px;'>
2009/3/12
A large number of published and unpublished measurements of cloud condensation nuclei (CCN) concentrations and aerosol optical thickness (AOT) measurements have been analyzed. AOT measurements were ob...
In situ measurements of speciated atmospheric mercury and the identification of source regions in the Mexico City Metropolitan Area
speciated atmospheric mercury source regions Mexico City Metropolitan Area
font style='font-size:12px;'>
2009/3/12
In order to expand the currently limited understanding of atmospheric mercury source-receptor relationships in the Mexico City Metropolitan Area, real time measurements of atmospheric mercury were mad...
The origin of sea salt in snow on Arctic sea ice and in coastal regions
sea salt snow Arctic sea ice coastal regions
font style='font-size:12px;'>
2009/3/10
Snow, through its trace constituents, can have a major impact on lower tropospheric chemistry, as evidenced by ozone depletion events (ODEs) in oceanic polar areas. These ODEs are caused by the chemis...
Soot aging time scales in polluted regions during day and night
Soot aging time scales polluted regions day and night
font style='font-size:12px;'>
2009/3/6
The aging of soot is one of the key uncertainties in the estimation of both the direct and indirect climate effect. While freshly emitted soot is initially hydrophobic and externally mixed, it can be ...
Long-Term Changes of Acidic Gases in China’s Yangtze Delta and Northeast Plain Regions in 1994-2006
climate-relevant acidic gases sulfur dioxide nitrogen oxides anthropogenic emission Yangtze Delta Northeast Plain
font style='font-size:12px;'>
2010/2/21
Historic and recent observational data of SO2 and NOx from Lin’an and Longfengshan background stations, located in the Yangtze Delta and the Northeast Plain region, respectively, are analyzed in order...