Sampling properties and spatial filtering of ensemble background‐error length‐scales

Sampling properties and spatial filtering of ensemble background‐error length‐scales
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集合背景误差长度尺度的采样特性和空间滤波

DOI:
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发表时间:
2013
期刊:
影响因子:
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通讯作者:
O. Pannekoucke
O. Pannekoucke
中科院分区:
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文献类型:
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作者:
L. Raynaud;O. Pannekoucke

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背景误差长度尺度是相关模型的关键组成部分,因为它们给出了观测影响延伸的距离的概念。长度尺度可以从扰动预报集合中估计出来,然而,业务应用中集合的有限大小在估计的长度尺度上引入了相对较大的采样噪声。
Background‐error length‐scales are key components of the correlation model since they give an idea of the distance over which the influence of an observation extends. The length‐scales can be estimated from an ensemble of perturbed forecasts, however the finite size of the ensembles in operational applications introduces a relatively large sampling noise on the estimated length‐scales.