搜索结果: 1-15 共查到“大气科学 photolysis”相关记录20条 . 查询时间(0.06 秒)
Modeling of photolysis rates over Europe: impact on chemical gaseous species and aerosols
photolysis rates Europe chemical gaseous species and aerosols
2011/2/25
This paper evaluates the impact of photolysis rate calculation on simulated European air composition and air quality. In particular, the impact of the cloud parametrisation and the impact of aerosols ...
Different photolysis kinetics at the surface of frozen freshwater vs. frozen salt solutions
Different photolysis kinetics frozen freshwater frozen salt solutions
2010/11/30
Reactions at air-ice interfaces can proceed at very different rates than those in aqueous solution, due to the unique disordered region at the ice surface known as the quasi-liquid layer (QLL) . The p...
Photolysis frequencies for NO2 are modeled for the conditions in urban streets, which are taken into account as canyons with variable height and width. The effect of a street canyon is presented with ...
Pressure dependence of the deuterium isotope effect in the photolysis of formaldehyde by ultraviolet light
the deuterium isotope effect the photolysis of formaldehyde ultraviolet light
2010/8/12
The pressure dependence of the relative photolysis rate of HCHO vs. HCDO has been investigated for the first time, using a photochemical reactor at the University of Copenhagen. The dissociation of HC...
Photolysis imprint in the nitrate stable isotope signal in snow and atmosphere of East Antarctica and implications for reactive nitrogen cycling
nitrate stable isotope signal snow atmosphere East Antarctica reactive nitrogen cycling
2009/11/19
The nitrogen (δ15N) and triple oxygen (δ17O and δ18O) isotopic composition of nitrate (NO3−) was measured year-round in the atmosphere and snow pits at Dome C, Antarctica (DC, 75.1° S, 123.3° E)...
Clouds, photolysis and regional tropospheric ozone budgets
Clouds photolysis regional tropospheric ozone budgets
2009/11/19
We use a three-dimensional chemical transport model to examine the shortwave radiative effects of clouds on the tropospheric ozone budget. In addition to looking at changes in global concentrations as...
Sensitivity studies of the recent new data on O（1D）quantum yields in O3 Hartley band photolysis in the stratosphere
O（1D）quantum yields O3 Hartley band photolysis stratosphere
2009/3/11
The production yields of excited oxygen O(1D) atoms from the near ultraviolet O3 photolysis are essential quantities for atmospheric chemistry calculations because of its importance as major sources o...
OH in the coastal boundary layer of Crete during MINOS: Measurements and relationship with ozone photolysis
OH coastal boundary layer MINOS ozone photolysis
2009/3/10
Hydroxyl radical (OH) concentrations were measured in August 2001 at Finokalia Station on the northeastern coast of Crete during the Mediterranean Intensive Oxidant Study (MINOS). OH was measured base...
Wavelength dependence of isotope fractionation in N2O photolysis
Wavelength dependence isotope fractionation N2O photolysis
2009/3/10
In previous reports on isotopic fractionation in the ultraviolet photolysis of nitrous oxide (N2O) only enrichments of heavy isotopes in the remaining N2O fraction have been found. However, most direc...
Actinic flux and photolysis in water droplets：Mie calculations and geometrical optics limit
Actinic flux photolysis water droplets Mie calculations geometrical optics limit
2009/3/9
Photolysis of water-soluble components inside cloud droplets by ultraviolet/visible radiation may play an important role in atmospheric chemistry. Two earlier studies have suggested that the actinic f...
Actinic flux and O1D photolysis frequencies retrieved from spectral measurements of irradiance at Thessaloniki，Greece
Actinic flux O1D photolysis frequencies irradiance Thessaloniki Greece
2009/3/9
The results of two methods retrieving actinic flux and ozone photolysis frequencies (JO1D), from measurements of irradiance with a Brewer MKIII spectroradiometer are investigated in this paper. The fi...
Absolute absorption cross-section and photolysis rate of I2
Absolute absorption cross-section photolysis rate I2
2009/3/4
Following recent observations of molecular iodine (I2) in the coastal marine boundary layer (MBL) (Saiz-Lopez and Plane, 2004), it has become important to determine the absolute absorption cross-secti...
NO2 and HCHO photolysis frequencies from irradiance measurements in Thessaloniki, Greece
NO2 HCHO photolysis frequencies Thessaloniki
2009/2/11
An empirical approach for the retrieval of nitrogen dioxide (NO2) and formaldehyde (HCHO) photolysis frequencies from measurements of global irradiance is presented in this work. Four months of synchr...
Actinometric measurements of NO2 photolysis frequencies in the atmosphere simulation chamber SAPHIR
Actinometric measurements NO2 photolysis frequencies atmosphere simulation chamber SAPHIR
2009/2/6
The simulation chamber SAPHIR at Forschungszentrum Jülich has UV permeable teflon walls facilitating atmospheric photochemistry studies under the influence of natural sunlight. Because the internal ra...
Model-aided radiometric determination of photolysis frequencies in a sunlit atmosphere simulation chamber
Model-aided radiometric determination photolysis frequencies sunlit atmosphere simulation chamber
2009/1/23
In this work diurnal and seasonal variations of mean photolysis frequencies for the atmosphere simulation chamber SAPHIR at Forschungszentrum Jülich are calculated. SAPHIR has a complex construction w...