A variational method for correcting non-systematic errors in numerical weather prediction |
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| Authors: | AiMei Shao Shuang Xi ChongJian Qiu |
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| Institution: | SHAO AiMei,XI Shuang & QIU ChongJian Key Laboratory of Arid Climatic Changing , Reducing Disaster of Gansu Province,College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China |
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| Abstract: | A variational method based on previous numerical forecasts is developed to estimate and correct non-systematic component of numerical weather forecast error. In the method, it is assumed that the error is linearly dependent on some combination of the forecast fields, and three types of forecast combination are applied to identifying the forecasting error: 1) the forecasts at the ending time, 2) the combination of initial fields and the forecasts at the ending time, and 3) the combination of the forecasts at... |
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| Keywords: | variational method non-systematic error Single Value Decomposition error correction shallow-water equation model |
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