中国大气环境光学探测研究   总被引：1，自引：0，他引：1  

刘文清  陈臻懿  刘建国  谢品华  刘诚  赵南京 《遥感学报》2016,20(5):724-732

激光/波谱技术促进了大气立体监测技术的发展,以光学探测和光谱数据解析为核心、以紫外、可见到红外全光谱为探测波段的各种高分辨率光学监技术,在中国逐渐实现了从近地面到100 km大气气象要素和大气痕量成分实时探测的能力,以及近地面到50 km大气多要素的实验模拟能力。光学技术以高灵敏度、高分辨率、高选择性、多组分以及实时等优势,在大气环境领域日益发挥作用,为研究大气污染演变与气象过程相互作用、大气细粒子污染和光化学烟雾形成机理等基础科学问题研究提供数据支持,为揭示城市和区域尺度的大气复合污染特征、量化其环境影响,提供科技支撑。  相似文献   

轻小型无人机遥感及其行业应用进展   总被引：1，自引：0，他引：1  

郭庆华  胡天宇  刘瑾  金时超  肖青  杨贵军  高显连  许强  谢品华  彭炽刚  闫利 《地理科学进展》2021,40(9):1550-1569

无人机是低空领域准确、灵活、高效获取多种类型高分辨率遥感数据的重要载体,无人机遥感技术在行业应用创新和管理部门科学决策之间构筑起信息沟通的关键桥梁。随着科技的进步、大数据时代的来临,无人机遥感系统的硬件设备、信息提取方法都取得了飞速的发展;同时其在国民经济主要行业领域的应用也面临着前所未有的机遇和挑战。论文首先介绍了无人机遥感系统的硬件研发进展,并指出轻小型、高精度、标准化与集成化是未来无人机遥感系统发展的总体趋势。其次,详细介绍了目前轻小型无人机遥感应用在农业、林草业、电力、测绘、大气探测和地质灾害等行业的应用现状,指出实现无人机多源遥感数据获取、融合、分析和提取的综合平台是未来轻小型无人机在民用领域行业应用创新的关键所在。最后,针对载荷与飞行平台的一体化集成应用、无人机组网作业、海量数据管理和信息自动化提取等发展趋势提出了几点思考。轻小型无人机遥感在国民经济各行业应用的普及化和标准化,将有助于国家和区域社会经济的健康发展。  相似文献   

Measurements of Nighttime Nitrate Radical Concentrations in the Atmosphere by Long-Path Differential Optical Absorption Spectroscopy     

李素文  刘文清  谢品华  李昂  秦敏  窦科 《大气科学进展》2007,24(5):875-880

The long-path differential optical absorption spectroscopy(LP-DOAS)technique was developed to mea- sure nighttime atmospheric nitrate radical(NO_3)concentrations.An optimized retrieval method,resulting in a small residual structure and low detection limits,was developed to retrieve NO_3.The time series of the NO_3 concentration were collected from 17 to 24 March,2006,where a nighttime average value of 15.8 ppt was observed.The interfering factors and errors are also discussed.These results indicate that the DOAS technique provides an essential tool for the quantification of NO_3 concentration and in the study of its effects upon nighttime chemistry.  相似文献   

北京边界层大气污染物的垂直廓线监测与分析   总被引：2，自引：1，他引：1       下载免费PDF全文

朱燕舞  刘文清  谢品华  窦科  秦敏  司福祺 《地球物理学报》2010,53(6):1278-1283

基于扫描差分光学吸收光谱（DOAS）系统,于2007年8月27日~9月4日期间对北京市朝阳区大气污染物SO₂,HCHO,O₃和NO₂的垂直分布进行了连续监测,并对污染物垂直廓线进行了分析,详细探讨了SO₂垂直分布特征以及夜间NO对O₃的滴定作用.结果表明,SO₂浓度通常没有明显垂直分层分布特征,但在清晨风速较低时呈现负梯度变化.研究发现夜间O₃、NO和NO₂之间存在稳态作用,表明城市区域O₃的滴定主要来自于地面NO的直接排放,显示出NO的滴定作用对夜间O₃、NO和NO₂的垂直变化起到重要作用.  相似文献   

Intercomparison of NO_x, SO_2, O_3, and Aromatic Hydrocarbons Measured by a Commercial DOAS System and Traditional Point Monitoring Techniques   总被引：1，自引：0，他引：1  

谢品华  刘文清  付强  王瑞斌  刘建国  魏庆农 《大气科学进展》2004,21(2)

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 sys  相似文献