Spatially Variable Advection Correction of Doppler Radial Velocity Data
Spatially Variable Advection Correction of Doppler Radial Velocity Data
复制标题
多普勒径向速度数据的空间可变平流校正
DOI:
10.1175/jas-d-20-0048.1
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发表时间:
2021
影响因子:
3.1
通讯作者:
Potvin, Corey K.
中科院分区:
文献类型:
--
作者:
Shapiro, Alan;Gebauer, Joshua G.;Dahl, Nathan A.;Bodine, David J.;Mahre, Andrew;Potvin, Corey K.
Techniques to mitigate analysis errors arising from the nonsimultaneity of data collections typically use advection-correction procedures based on the hypothesis (frozen turbulence) that the analyzed field can be represented as a pattern of unchanging form in horizontal translation. It is more difficult to advection correct the radial velocity than the reflectivity because even if the vector velocity field satisfies this hypothesis, its radial component does not—but that component does satisfy a second-derivative condition. We treat the advection correction of the radial velocity (υr) as a variational problem in which errors in that second-derivative condition are minimized subject to smoothness constraints on spatially variable pattern-translation components (U,V). The Euler–Lagrange equations are derived, and an iterative trajectory-based solution is developed in whichU,V, andυrare analyzed together. The analysis code is first verified using analytical data, and then tested using Atmospheric Imaging Radar (AIR) data from a band of heavy rainfall on 4 September 2018 near El Reno, Oklahoma, and a decaying tornado on 27 May 2015 near Canadian, Texas. In both cases, the analyzedυrfield has smaller root-mean-square errors and larger correlation coefficients than in analyses based on persistence, linear time interpolation, or advection correction using constantUandV. As some experimentation is needed to obtain appropriate parameter values, the procedure is more suitable for non-real-time applications than use in an operational setting. In particular, the degree of spatial variability inUandV, and the associated errors in the analyzedυrfield are strongly dependent on a smoothness parameter.
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DOI:
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发表时间:
2015
期刊:
影响因子:
--
作者:
J. Kurdzo;Feng Nai;D. Bodine;T. Bonin;R. Palmer;B. Cheong;J. Lujan;Andrew Mahre;Andrew D. Byrd
通讯作者:
Andrew D. Byrd
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
A. Shapiro;K. Willingham;C. Potvin
通讯作者:
C. Potvin
影响因子:
3.2
作者:
Zachary B. Wienhoff;H. Bluestein;Louis J. Wicker;J. Snyder;A. Shapiro;C. Potvin;J. Houser;D. Reif
通讯作者:
D. Reif
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
A. Shapiro;Stefan R. Rahimi;C. Potvin;Leigh Orf
通讯作者:
Leigh Orf
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Yu‐Chieng Liou;Ing
通讯作者:
Ing