搜索结果: 1-15 共查到“nitrogen dioxide”相关记录15条 . 查询时间(0.093 秒)
Nitrogen Dioxide in the Urban Forest: Exposure and Uptake
urban forest street trees photochemical oxidant cycle pollution
2014/11/17
Nitrogen dioxide (NO2) levels were measured inside and adjacent to canopies of urban trees in Springfield, MA, over two growing seasons. Nitrogen dioxide levels were consistently and significantly hig...
Passive Sampling of Ambient Nitrogen Dioxide Using Local Tubes
Nitrogen Dioxide Passive Sampler Diffusive Sampling
2013/3/11
Traditional active and automated sampling of nitrogen dioxide (NO2) monitoring techniques require expensive instrumentation which is not easily adapted for large scale monitoring by resource limited c...
Removal of Nitrogen Dioxide and Sulfur Dioxide from Air Streams by Absorption in Urea Solution
Sulfur Dioxide Removal Nitrogen Dioxide Removal Column Absorption Removal of Acid Gases Air Pollution Prevention
2013/3/12
The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperat...
Long term measurements of sulfur dioxide, nitrogen dioxide, ammonia, nitric acid and ozone in Africa using passive samplers
sulfur dioxide nitrogen dioxide ammonia nitric acid ozone Africa passive samplers
2010/8/16
In this paper we present the long term monitoring of ambient gaseous concentrations within the framework of the IDAF (IGAC-DEBITS-AFRICA) program. This study proposes for the first time an analysis of...
Improvements in the profiles and distributions of nitric acid and nitrogen dioxide with the LIMS version 6 dataset
nitric acid nitrogen dioxide the LIMS version 6 dataset
2010/8/13
The quality of the Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) nitric acid (HNO3) and nitrogen dioxide (NO2) profiles and distributions of 1978/1979 are described after their processing ...
Impact of tropospheric nitrogen dioxide on the regional radiation budget
tropospheric nitrogen dioxide regional radiation budget Impact
2009/9/11
Following the launch of several satellite ultraviolet and visible spectrometers including the Ozone Monitoring Instrument (OMI), much has been learned about the global distribution of nitrogen dioxide...
Detection of pollution transport events southeast of Mexico City using ground-based visible spectroscopy measurements of nitrogen dioxide
pollution transport events Mexico City nitrogen dioxide
2009/7/23
This work presents ground based differential optical absorption spectroscopy (DOAS) measurements of nitrogen dioxide (NO2) during the MILAGRO field campaign in March 2006 at the Tenango del Aire resea...
Development of a Nitrogen Dioxide Gas Sensor Based on Mid-Infrared Absorption Spectroscopy
Fiber laser Difference-frequency generation Laser spectroscopy
2009/6/9
We demonstrated a mid-IR optical NO2 monitor based on a frequency-stabilized, Yb-fiber laser pumped difference frequency generation (DFG) in a periodically poled lithium niobate (PPLN) crystal. A high...
Retrieval of nitrogen dioxide stratospheric profiles from ground-based zenith-sky UV-visible observations: validation of the technique through correlative comparisons
nitrogen dioxide zenith-sky UV-visible
2009/3/9
A retrieval algorithm based on the Optimal Estimation Method (OEM) has been developed in order to provide vertical distributions of NO2 in the stratosphere from ground-based (GB) zenith-sky UV-visibl...
A transboundary transport episode of nitrogen dioxide as observed from GOME and its impact in the Alpine region
transboundary transport episode nitrogen dioxide GOME Alpine region
2009/1/23
High tropospheric NO2 amounts are occasionally detected by space-borne spectrometers above cloudy scenes. For monitoring of near-ground air pollution such data are not directly applicable because clou...
Spatially resolved measurements of nitrogen dioxide in an urban environment using concurrent multi-axis differential optical absorption spectroscopy
nitrogen dioxide urban environment optical absorption spectroscopy
2008/12/19
A novel system using the technique of concurrent multi-axis differential optical absorption spectroscopy system has been developed and applied to the measurement of nitrogen dioxide in an urban enviro...
Light induced conversion of nitrogen dioxide into nitrous acid on submicron humic acid aerosol
nitrogen dioxide nitrous acid submicron humic acid aerosol
2008/12/17
The interactions of aerosols consisting of humic acids with gaseous nitrogen dioxide (NO2) were investigated under different light conditions in aerosol flow tube experiments at ambient pressure and t...
Evaluation of nitrogen dioxide chemiluminescence monitors in a polluted urban environment
nitrogen dioxide chemiluminescence monitors polluted urban environment
2008/12/10
Data from a recent field campaign in Mexico City are used to evaluate the performance of the EPA Federal Reference Method for monitoring the ambient concentrations of NO2. Measurements of NO2 from st...
4D-Var assimilation of MIPAS chemical observations: ozone and nitrogen dioxide analyses
4D-Var MIPAS ozone nitrogen dioxide
2008/11/24
This paper discusses the global analyses of stratospheric ozone (O3) and nitrogen dioxide (NO2) obtained by the Belgian Assimilation System for Chemical Observations from Envisat (BASCOE). Based on a ...
Interaction of nitrogen dioxide with free base phthalocyanine
phthalocyanine gas sensors ab initio calculations
2011/4/27
Quantum chemical ab initio method was used to investigate interactions between NO2 and H2Pc. Four possible sites for NO2 adsorption were considered. Full geometry optimisation together with frequency ...