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- Title
A new method for instant correction of numerical weather prediction products in China.
- Authors
Zhang, LanHui; Wang, ShiGong; He, ChanSheng; Shang, KeZheng; Meng, Lei; Li, Xu; Lofgren, Brent
- Abstract
This paper presents a new correction method, 'instant correction method (ICM)', to improve the accuracy of numerical prediction products (NPP) and provide weather variables at grid cells. The ICM makes use of the continuity in time of the forecast errors at different forecast times to improve the accuracy of large scale NPP. To apply the ICM in China, an ensemble correction scheme is designed to correct the T213 NPP (the most popular NPP in China) through different statistical methods. The corrected T213 NPP (ICM T213 NPP) are evaluated by four popular indices: Correlation coefficient, climate anomalies correlation coefficient, root-mean-square-errors (RMSE), and confidence intervals (CI). The results show that the ICM T213 NPP are more accurate than the original T213 NPP in both the training period (2003-2008) and the validation period (2009-2010). Applications in China over the past three years indicate that the ICM is simple, fast, and reliable. Because of its low computing cost, end users in need of more accurate short-range weather forecasts around China can benefit greatly from the method.
- Subjects
CHINA; NUMERICAL weather forecasting; METEOROLOGICAL precipitation; STANDARD deviations; KALMAN filtering; WIND speed measurement
- Publication
SCIENCE CHINA Earth Sciences, 2015, Vol 58, Issue 2, p231
- ISSN
1674-7313
- Publication type
Article
- DOI
10.1007/s11430-014-4957-6