A New Finite-Differencing Scheme for the Tracer Transport Equation

A New Finite-Differencing Scheme for the Tracer Transport Equation
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示踪输运方程的一种新的有限差分格式

DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
J. Lerner
J. Lerner
中科院分区：
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文献类型：
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作者：
G. Russell;J. Lerner

文献摘要

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摘要本文提出了一种新的有限差分格式，用于求解给定风速下的示踪剂输运方程。新方案预测的预后量是平均浓度及其空间梯度。在使用均匀空气质量的一维和二维试验中，新格式的精度大致与四阶差分格式相当。当气团不均匀时，新格式比四阶差分格式有上级的优越性。的应用程序的计划三维示踪剂建模。
Abstract A new finite-differencing scheme for solving the tracer transport equation given prescribed winds is presented. The prognostic quantities predicted by the new scheme are the mean concentration and its spatial gradients. In one and two-dimensional tests using uniform air masses, the new scheme is roughly comparable to a fourth-order differencing scheme in accuracy. When the air masses are not uniform, the new scheme is superior to fourth-order differencing. An application of the schemes to three-dimensional tracer modeling is included.