On the Discrepancy in Simultaneous Observations of the Structure Parameter of Temperature Using Scintillometers and Unmanned Aircraft

On the Discrepancy in Simultaneous Observations of the Structure Parameter of Temperature Using Scintillometers and Unmanned Aircraft
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闪烁仪与无人机同时观测温度结构参数的差异

DOI:
10.1007/s10546-015-0086-9
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发表时间:
2016
影响因子:
4.3
通讯作者:
B. Maronga
B. Maronga
中科院分区:
地球科学3区
文献类型:
--
作者:
F. Beyrich;A.F. Moene;J. Bange;A. Platis;S. Martin;B. Maronga

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我们详细介绍了Beyrich et al.(边界层气象144:83-112,2012)提出的初步结果,他们比较了无人气象微型飞行器()获得的温度结构参数()与两个大孔径闪烁仪(LASs)获得的单个实验(LITFASS-2009)有限数据集的温度结构参数()。他们发现从数据中得到的结果明显大于从LAS数据中得到的结果。我们调查了LITFASS-2009和LITFASS-2010期间其他六天的航班是否也存在类似的差异,以及这些差异是否可以通过对LAS数据和数据进行更详细的处理来减少或解释。该处理包括不同的校正和措施,以减少数据集的空间和时间平均之间的差异。我们的结论是,Beyrich等人报告的差异也可以在其他日子找到。对于las导出的值,影响最大的附加处理步骤是饱和度校正和湿度校正。对于导出值,最重要的一步是闪烁计路径加权函数的应用。使用飞机的真实空气速度将时间结构函数转换为空间结构函数,而不是地面速度(如Beyrich等人所做的),不会改变平均差异,但它确实会影响单个航班的值。为了研究数据是否依赖于底层温度数据集结合时空采样的事实,我们使用大涡模拟数据来分析具有不同平均地面速度的虚拟飞行。这一分析表明,在多次飞行中平均下来,这与真实空气速度的关系很小。
We elaborate on the preliminary results presented in Beyrich et al. (in Boundary-Layer Meteorol 144:83–112, 2012), who compared the structure parameter of temperature () obtained with the unmanned meteorological mini aerial vehicle () versusobtained with two large-aperture scintillometers (LASs) for a limited dataset from one single experiment (LITFASS-2009). They found thatobtained from thedata is significantly larger than that obtained from the LAS data. We investigate if similar differences can be found for the flights on the other six days during LITFASS-2009 and LITFASS-2010, and whether these differences can be reduced or explained through a more elaborate processing of both the LAS data and thedata. This processing includes different corrections and measures to reduce the differences between the spatial and temporal averaging of the datasets. We conclude that the differences reported in Beyrich et al. can be found for other days as well. For the LAS-derived values the additional processing steps that have the largest effect are the saturation correction and the humidity correction. For the-derived values the most important step is the application of the scintillometer path-weighting function. Using the true air speed of theto convert from a temporal to a spatial structure function rather than the ground speed (as in Beyrich et al.) does not change the mean discrepancy, but it does affectvalues for individual flights. To investigate whetherderived from thedata depends on the fact that the underlying temperature dataset combines spatial and temporal sampling, we used large-eddy simulation data to analyzefrom virtual flights with different mean ground speeds. This analysis shows thatdoes only slightly depends on the true air speed when averaged over many flights.
DOI: 10.1023/a:1019683616097
发表时间: 2002-10
影响因子: 4.3
作者:
W. Meijninger;A. E. Green;O. Hartogensis;W. Kohsiek;J. Hoedjes;R. Zuurbier;H. D. de Bruin
通讯作者: W. Meijninger;A. E. Green;O. Hartogensis;W. Kohsiek;J. Hoedjes;R. Zuurbier;H. D. de Bruin
DOI: --
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发表时间: 2013
影响因子: 4.3
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DOI: --
发表时间: 2006-05
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影响因子: --
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A. Moene;W. Meijninger;W. Kohsiek;B. Gioli;F. Miglietta;F. Bosveld
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对流边界层中的非均质性引起的热通量模式:可以从观测中检测到它们吗?是否存在混合高度? LITFASS-2003 实验的大涡模拟研究
DOI: 10.1007/s10546-013-9822-1
发表时间: 2003
影响因子: 4.3
作者:
Sühring M;Raasch S
通讯作者: Raasch S