搜索结果: 1-15 共查到“大气科学 Determination”相关记录18条 . 查询时间(0.187 秒)
Novel method of generation of Ca(HCO3)2 and CaCO3 aerosols and first determination of hygroscopic and cloud condensation nuclei activation properties
Ca(HCO3)2 and CaCO3 aerosols hygroscopic and cloud condensation nuclei activation properties
2010/9/21
Atmospheric mineral aerosols contain CaCO3 as a reactive component. A novel method to produce CaCO3 aerosol was developed by spraying Ca(HCO3)2 solution, which was generated from a CaCO3 suspension an...
Determination of particulate lead using aerosol mass spectrometry: MILAGRO/MCMA-2006 observations
particulate lead aerosol mass spectrometry MILAGRO/MCMA-2006 observations
2010/8/13
We report the first measurements of particulate lead (Pb) from Aerodyne Aerosol Mass Spectrometers, which were deployed in and around Mexico City during the Megacity Initiative: Local and Global Resea...
Ice nucleation properties of mineral dust particles: determination of onset RHi, IN active fraction, nucleation time-lag, and the effect of active sites on contact angles
mineral dust particles onset RHi IN active fraction nucleation time-lag
2010/1/18
A newly developed ice nucleation experimental set up was used to investigate the heterogeneous ice nucleation properties of three Saharan and one Spanish dust particle samples. It was observed that th...
Parameterization of vertical diffusion and the atmospheric boundary layer height determination in the EMEP model
vertical diffusion atmospheric boundary layer height determination EMEP model
2010/2/1
This paper introduces two changes of the turbulence parameterization for the EMEP (European Monitoring and Evaluation Programme) Eulerian air pollution model: the replacement of the Blackadar in stabl...
Technical Note: Determination of aerosol optical properties by a calibrated sky imager
Technical Note aerosol optical properties calibrated sky imager
2009/9/11
The calibrated ground-based sky imager developed in the Marine Physical Laboratory, the Whole Sky Imager (WSI), has been tested with data from the Atmospheric Radiation Measurement Program (ARM) at th...
The use of disjunct eddy sampling methods for the determination of ecosystem level fluxes of trace gases
disjunct eddy sampling methods ecosystem level fluxes trace gases
2009/3/13
The concept of disjunct eddy sampling (DES) for use in measuring ecosystem-level micrometeorological fluxes is re-examined. The governing equations are discussed as well as other practical considerati...
The oxidation efficiency of the troposphere is largely determined by the hydroxyl radical and its global distribution. Its presence limits the lifetime of most trace gases. Because of the great import...
Meteor velocity determination with plasma physics
Meteor velocity determination plasma physics
2009/2/26
Understanding the global meteor flux at Earth requires the measurement of meteor velocities. While several radar methods exist for measuring meteor velocity, they may be biased by plasma reflection me...
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...
A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 2 – chloride solutions and mixed bromide/chloride solutions
chemical probe technique reactive halogen species aqueous solution chloride solutions
2009/1/12
Although reactive halogen species (X*=X•, •X2-, X2 and HOX, where X=Br, Cl, or I) are important environmental oxidants, relatively little is known about their kinetics in condensed phases ...
A chemical probe technique for the determination of reactive halogen species in aqueous solution: Part 1 – bromide solutions
chemical probe technique reactive halogen species bromide solutions
2009/1/12
Reactive halogen species (X*=X•, •X2-, X2 and HOX, where X=Br, Cl, or I) in seawater, sea-salt particles, and snowpacks play important roles in the chemistry of the marine boundary layer. ...
Effects of column density on I2 spectroscopy and a determination of I2 absorption cross section at 500 nm
column density I2 spectroscopy I2 absorption cross section
2009/1/9
The use of ro-vibronic spectra of I2 in the region of 543 nm to 578 nm as reference spectra for atmospheric Differential Optical Absorption Spectroscopy is studied. It is shown that the retrieval of a...
A novel method for estimating the mixing height based on ceilometer measurements is described and tested against commonly used methods for determining mixing height. In this method an idealised backsc...
Aerosol optical properties at Lampedusa （Central Mediterranean）. 2. Determination of single scattering albedo at two wavelengths for different aerosol types
Aerosol optical properties Lampedusa Determination of single scattering albedo wavelengths for different aerosol types
2009/1/4
. Aerosol optical properties were retrieved from direct and diffuse spectral irradiance measurements made by a multi-filter rotating shadowband radiometer (MFRSR) at the island of Lampedusa (35.5° N, ...
Technical Note: Improved total atmospheric water vapour amount determination from near-infrared filter measurements with sun photometers
atmospheric water vapour near-infrared filter measurements sun photometer
2008/12/18
In this work we explore the effect of the contribution of the solar spectrum to the recorded signal in wavelengths outside the typical 940-nm filter's bandwidth. We employ gaussian-shaped filters as w...