【摘 要】
:
A field-based intercomparison study of a commercial Differential Optical Absorption Spectroscopy (DOAS) instrument (OPSIS AB, Sweden) and different point-sample
【机 构】
:
Anhui Institute of Optics and Fine Mechanics,China National Environmental Monitoring Center
论文部分内容阅读
A field-based intercomparison study of a commercial Differential Optical Absorption Spectroscopy (DOAS) instrument (OPSIS AB, Sweden) and different point-sample monitoring techniques (PM, based on an air monitoring station, an air monitoring vehicle, and various chemical methods) was conducted in Beijing from October 1999 to January 2000. The mixing ratios of six trace gases including NO, NO2, SO2,O3, benzene, and toluene were monitored continuously during the four months. A good agreement between the DOAS and PM data was found for NO2 and SO2. However, the concentrations of benzene, toluene,and NO obtained by DOAS were significantly lower than those measured by the point monitors. The ozone levels monitored by the DOAS were generally higher than those measured by point monitors. These results may be attributed to a strong vertical gradient of the NO-O3-NO2 system and of the aromatics at the measurement site. Since the exact data evaluation algorithm is not revealed by the manufacturer of the DOAS system, the error in the DOAS analysis can also not be excluded.
其他文献
The effect of temperature on the life history characteristics of amictic females (AF), unfertilized mictic females (UMF) and fertilized mictic females (FMF) in
A silicagel fractionation procedure for environmental sample extracts, which separates chlorinatedhydrocarbons(CHCs) and organophosphorus, pyrethroid pesticides
Growth and uptake of exogenous phosphate by Microcystis aeruginosa in batch culture under differenttemperature, photoperiod, and turbulence were studied by the
The performance of UV/H2O2, UV/O3 and UV/H2O2/O3 oxidation systems for treating spent caustic froman ethylene plant was investigated. In UV/H2O2 system, with th
TOMS/Al data with nearly 20 years are utilized in the paper to evaluate dust activities in North China.Combined with simultaneous NCEP reanalysis climate data,
Novel C-nucleosides of tiazofurin analogue (2-[2-(hydroxymethyl)-1, 3-dioxolan-5-yl]1, 3-thiazole-4-carboxamide) and its thiol-substituted derivative (2-[2-(mer
Land degradation is a consequence stemming from both natural processes and social economic activities.On the bases of analyzing general situation of agricultura
Foamed waste glass(FWG) material is newly developed for the purpose to utilize the waste glassware andother waste glass. FWG has a multi-porous structure that c
By using the Reynolds Stress Closure Model(RSM), turbulent Counter-Gradient-Transport (CGT) phenomenon was numerically investigated in asymmetric flow with a je
The phytoplankton reproduction capacity (PRC), as a new concept regarding chlorophyll-a and primary production (PP) is described. PRC is different from PP, carb