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双差分激光雷达——一组可以提高臭氧测量精度的波长 总被引：1，自引：0，他引：1
模拟了气溶胶影响三波长双差分 (2 6 6 - 2 89- 30 8nm)方法和双波长差分 (2 6 6 - 2 89nm和 2 6 6 - 30 8nm)方法测量对流层臭氧的误差 ,并在合肥测量了对流层 2～ 3.6km高度的臭氧分布。结果表明 ,三波长双差分方法比常规的双波长差分方法能更有效地克服气溶胶的影响 ,三波长差分测量的结果比常规的双波长差分的结果更精确。同时还揭示了气溶胶影响双波长差分方法测量臭氧的规律。模拟结论与测量结果是一致的 相似文献
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In this paper the effects of aerosol on tropospheric ozone measurements by three-wavelength (266-289-308nm) dual differential absorption lidar (DIAL) and two-wavelength (266-289 nm and 266-308 nm) DIAL are simulated.By using the two kinds of DIAL.vertical profiles of ozone density from 2 to 3.6 km altitude range are measured.Both simulation and observation results show that the three-wavelength dual-DIAL method is more effective to reduce the effects of aerosol than the two-wavelength DIAL method.Therefore,accurate ozone density distributions can be retrieved by the three wavelength dual DIAL method. 相似文献
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Qiu Jinhuan 《大气科学进展》1995,12(2):177-186
Ｔｗｏ－ｗａｖｅｌｅｎｇｔｈＬｉｄａｒＭｅａｓｕｒｅｍｅｎｔｏｆＣｌｏｕｄ－ａｅｒｏｓｏｌＯｐｔｉｃａｌＰｒｏｐｅｒｔｉｅｓＱｉｕＪｉｎｈｕａｎ（邱金桓）（ＩｎｓｈｔｕｔｅｏｆＡｔｍｏｓｐｈｅｒｉｃＰｈｙｓｉｃｓ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃ... 相似文献
4.
C.?González?Alonso T.?Gasmi A.?GonzáLEZ?Ure?aEmail author 《Journal of Atmospheric Chemistry》2005,50(2):159-169
{E}thylene, representative of volatile organic compounds and high photochemical ozone creation potential precursor, has been
monitored with a single-ended CO2-TEA laser-based DIAL system using a topographic target. A correlation between ozone concentration and ethylene evolutions
in Madrid's urban atmosphere was demonstrated and supported with a basic photochemical smog model. The present work brings
additional evidence to the many models which state that ethylene, being a hydrocarbon, has a role to play in the generation
of tropospheric ozone. 相似文献
5.
中国科学院大气物理研究所研制了一台双波长偏振激光雷达,在格尔木市气象局进行了为期一年的不连续观测。本文选择了其中一天的观测个例,分别从雷达硬件结构、数据类型、数据处理方法等方面进行了系统的介绍和分析。结果表明,此次观测个例中,卷云位于地表以上4.7 km~7 km处,光学厚度均小于0.1,532 nm和1064 nm上的平均激光雷达比分别为24.3 Sr(激光雷达比)和29.9 Sr,色比多集中在0.8~1之间,此外532 nm波长上的退偏比多集中在0.25~0.3之间。此雷达对高空卷云能进行有效探测,为下一步研究青藏高原地区卷云长期时空分布特征奠定基础。 相似文献
6.
胡顺星 naol.hfcas.ac.cn 胡欢陵 naol.hfcas.ac.cn 周军 naol.hfcas.ac.cn 吴永华 naol.hfcas.ac.cn 《Acta Meteorologica Sinica》2002,(2)
In this paper the effects of aerosol on tropospheric ozone measurements by three-wavelength(266-289-308nm) dual differential absorption lidar (DIAL) and two-wavelength (266-289 nmand 266-308 nm) DIAL are simulated.By using the two kinds of DIAL.vertical profiles of ozonedensity from 2 to 3.6 km altitude range are measured.Both simulation and observation resultsshow that the three-wavelength dual-DIAL method is more effective to reduce the effects of aerosolthan the two-wavelength DIAL method.Therefore,accurate ozone density distributions can beretrieved by the three wavelength dual DIAL method. 相似文献
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利用DIAL(Data and Information Access Link)、Jshape和IMS(Intemet Map Server)等3种WebGIS工具分别发布黑河流域数字高程、土地利用等专题数据,并在此基础上对3种方法进行对比,探讨因特网环境下空间数据发布的最佳方法.通过对这3种空间数据发布方法的比较,我们得出以下结论:MapObject IMS是发布ArcView shape格式和Arc/INFO Coverage格式矢量图的最佳工具,对于网格数据的发布无能为力;Jshape适合于发布小数据量、简单的矢量图;DIAL工具能很好的支持网格数据的空间发布,支持HDF数据格式,并且支持元数据.所以,DIAL是一种理想的空间数据发布工具. 相似文献
8.
Different methods to determine the height of the convective boundary layer from lidar measurements are described and compared.
The differences in either aerosol backscatter or in humidity between the boundary layer and the free troposphere are used,
and either the variance or the gradient profile of the parameter under study is evaluated. On average the different methods
are in very good agreement. Temporal resolution of the gradient methods is very high, on the order of seconds, but often there
is an ambiguity in the choice of the “relevant” minimum in the gradient that corresponds to the boundary-layer height. This
is avoided by combining the variance and the gradient methods, using the result of the variance analysis as an indicator for
the region where the minimum of the gradient is sought. The combined method is useful for automated determination of the boundary-layer
height at least under convective conditions. Aerosol backscatter is found to be as good an indicator for boundary-layer air
as humidity, so a relatively simple backscatter lidar is sufficient for determination of the boundary-layer height. 相似文献
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