搜索结果: 1-15 共查到“大气物理学 OH”相关记录28条 . 查询时间(0.357 秒)
北京地区上空OH转动温度的季节性变化
转动温度 季节变化 年变化
2015/6/4
在北京东北方向的兴隆天文台,自主搭建的大气辐射观测仪器对OH夜气辉从2011年12月开始进行观测.利用高分辨率的OH(8-3)带的振转光谱计算了转动温度,并与TIMED/SABER探测的温度进行了比较.观测表明,两年(2012—2013)的OH(8-3)带转动温度平均值为203.0±11.2 K,有明显的季节变化,冬季高,夏季低,温差可达60 K.与SABER观测温度的季节变化一致.对日平均的转动...
Atmospheric OH reactivities in the Pearl River Delta – China in summer 2006: measurement and model results
Atmospheric OH the Pearl River Delta China in summer 2006
2010/12/20
Total atmospheric OH reactivities (kOH) have been measured as reciprocal OH lifetimes by a newly developed instrument at a rural site in the densely populated Pearl River Delta (PRD) in Southern China...
Variability of the nighttime OH layer and mesospheric ozone at high latitudes during northern winter: influence of meteorology
the nighttime OH layer mesospheric ozone northern winter meteorology
2010/11/29
Analyses of OH zonal means, recorded at boreal high latitudes by the Aura Microwave Limb Sounder (MLS) in winters of 2005–2009, have shown medium- (weeks) and short- (days) term variability of the nig...
Measurements of OH and HO2 yields from the gas phase ozonolysis of isoprene
OH and HO2 yields gas phase ozonolysis isoprene
2010/2/21
The reactions of ozone with alkenes are an important source of hydroxyl (OH) radicals; however, quantification of their importance is hindered by uncertainties in the absolute OH yield. Hydroxyl radic...
Sensitivity analyses of OH missing sinks over Tokyo metropolitan area in the summer of 2007
Sensitivity analyses OH missing sinks Tokyo metropolitan area
2009/12/3
OH reactivity is one of key indicators which reflect impacts of photochemical reactions in the atmosphere. An observation campaign has been conducted in the summer of 2007 at the heart of Tokyo metrop...
Technical Note: Formal blind intercomparison of OH measurements: results from the international campaign HOxComp
Formal blind intercomparison OH measurements international campaign HOxComp
2009/11/9
Hydroxyl radicals (OH) are the major oxidizing species in the troposphere. Because of their central importance, absolute measurements of their concentrations are needed to validate chemical mechanisms...
Sulfuric acid and OH concentrations in a boreal forest site
Sulfuric acid OH concentrations boreal forest site
2009/10/9
As demonstrated in a number of investigations, gaseous sulfuric acid plays a central role in atmospheric aerosol formation. Using chemical ionization mass spectrometer the gas-phase sulfuric acid and ...
Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign–Part 2: Model comparison and radical budget
OH HO2 Model comparison radical budget
2009/9/22
Measurements of hydroxyl (OH) and hydroperoxy (HO2) radicals were made during the Mexico City Metropolitan Area (MCMA) field campaign as part of the MILAGRO (Megacity Initiative: Local and Global Rese...
The formation of secondary organic aerosol from the isoprene + OH reaction in the absence of NOx
secondary organic aerosol isoprene + OH reaction absence of NOx
2009/9/14
The reaction of isoprene (C5H8) with hydroxyl radicals has been studied in the absence of nitrogen oxides (NOx) to determine physical and chemical characteristics of the secondary organic aerosol form...
Modelling trends in OH radical concentrations using generalized additive models
Modelling trends OH radical concentrations generalized additive models
2009/3/31
During the TORCH campaign a zero dimensional box model based on the Master Chemical Mechanism was used to model concentrations of OH radicals. The model provided a close overall fit to measured concen...
Measurements of OH and HO2 concentrations during the MCMA-2006 field campaign – Part 1: Deployment of the Indiana University laser-induced fluorescence instrument
OH HO2 MCMA-2006 field campaign laser-induced fluorescence instrument
2009/3/13
Measurements of tropospheric hydroxyl (OH) and hydroperoxy (HO2) radicals were made during the MCMA (Mexico City Metropolitan Area) field campaign as part of the MILAGRO (Megacity Initiative: Local an...
Airborne measurement of OH reactivity during INTEX-B
Airborne measurement OH reactivity INTEX-B
2009/3/12
The measurement of OH reactivity, the inverse of the OH lifetime, provides a powerful tool to investigate atmospheric photochemistry. A new airborne OH reactivity instrument was designed and deployed ...
The global mean OH concentration ([OH]GM) has been used as an indicator of the atmospheric oxidizing efficiency and its changes over time. It is also used for evaluating the performance of atmospheric...
New particle formation during a- and b-pinene oxidation by O3, OH and NO3, and the influence of water vapour: particle size distribution studies
a- and b-pinene oxidation O3 OH NO3 water vapour particle size distribution
2009/3/12
New particle formation during the oxidation of a- and b-pinene (C10H16) by ozone, OH and NO3 was studied by measuring the particle size distributions with a scanning mobility particle sizer (TSI 3936)...
Kinetics of the gas-phase reactions of OH radicals with alkanes and cycloalkanes
Kinetics gas-phase reactions OH radicals alkanes cycloalkanes
2009/3/11
The available database concerning rate constants for gas-phase reactions of the hydroxyl (OH) radical with alkanes through early 2003 is presented over the entire temperature range for which measureme...