Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021GL092555 |
Correcting weather and climate models by machine learning nudged historical simulations | |
Oliver Watt-Meyer; Noah D. Brenowitz; Spencer K. Clark; Brian Henn; Anna Kwa; Jeremy McGibbon; W. Andre Perkins; Christopher S. Bretherton | |
2021-07-15 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Due to limited resolution and inaccurate physical parameterizations, weather and climate models consistently develop biases compared to the observed atmosphere. Using the FV3GFS model at coarse resolution, we propose a method of machine learning corrective tendencies from a hindcast simulation nudged towards observational analysis. We show that a random forest can predict the nudging tendencies from this hindcast simulation with moderate skill using only the model state as input. This random forest is then coupled to FV3GFS, adding corrective tendencies of temperature, specific humidity and horizontal winds at each timestep. The coupled model shows no signs of instability in year-long simulations and has significant reductions in short-term forecast error for 500hPa height, surface pressure and near-surface temperature. Furthermore, the root mean square error of the annual-mean precipitation is reduced by about 20%. Biases of other variables remain similar or in some cases, like upper-atmospheric temperature, increase in the year-long simulations. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/334033 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Oliver Watt-Meyer,Noah D. Brenowitz,Spencer K. Clark,et al. Correcting weather and climate models by machine learning nudged historical simulations[J]. Geophysical Research Letters,2021. |
APA | Oliver Watt-Meyer.,Noah D. Brenowitz.,Spencer K. Clark.,Brian Henn.,Anna Kwa.,...&Christopher S. Bretherton.(2021).Correcting weather and climate models by machine learning nudged historical simulations.Geophysical Research Letters. |
MLA | Oliver Watt-Meyer,et al."Correcting weather and climate models by machine learning nudged historical simulations".Geophysical Research Letters (2021). |
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