Počet záznamů: 1
Postprocessing of Ensemble Weather Forecast Using Decision Tree-Based Probabilistic Forecasting Methods
- 1.
SYSNO ASEP 0570950 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Postprocessing of Ensemble Weather Forecast Using Decision Tree-Based Probabilistic Forecasting Methods Tvůrce(i) Benáček, Patrik (UEK-B) SAI, RID, ORCID
Farda, Aleš (UEK-B) RID, SAI
Štěpánek, Petr (UEK-B) RID, SAI, ORCIDZdroj.dok. Weather and Forecasting - ISSN 0882-8156
Roč. 38, č. 1 (2023), s. 69-82Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Ensembles ; Probability forecasts ; models ; distribution ; Short-range prediction ; Decision trees ; Machine learning Vědní obor RIV DG - Vědy o atmosféře, meteorologie Obor OECD Meteorology and atmospheric sciences CEP EF16_019/0000797 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Výzkumná infrastruktura CzeCOS IV - 90248 - Ústav výzkumu globální změny AV ČR, v. v. i. Způsob publikování Omezený přístup Institucionální podpora UEK-B - RVO:86652079 UT WOS 000926288000002 EID SCOPUS 85146146258 DOI 10.1175/WAF-D-22-0006.1 Anotace Producing an accurate and calibrated probabilistic forecast has high social and economic value. Systematic errors or biases in the ensemble weather forecast can be corrected by postprocessing models whose development is an urgent challenge. Traditionally, the bias correction is done by employing linear regression models that estimate the conditional probability distribution of the forecast. Although this model framework works well, it is restricted to a prespecified model form that often relies on a limited set of predictors only. Most machine learning (ML) methods can tackle these problems with a point prediction, but only a few of them can be applied effectively in a probabilistic manner. The tree-based ML techniques, namely, natural gradient boosting (NGB), quantile random forests (QRF), and distributional regression forests (DRF), are used to adjust hourly 2-m temperature ensemble prediction at lead times of 1-10 days. The ensemble model output statistics (EMOS) and its boosting version are used as benchmark models. The model forecast is based on the European Centre for Medium-Range Weather Forecasts (ECMWF) for the Czech Republic domain. Two training periods 2015-18 and 2018 only were used to learn the models, and their prediction skill was evaluated in 2019. The results show that the QRF and NGB methods provide the best performance for 1-2-day forecasts, while the EMOS method outperforms other methods for 8-10-day forecasts. Key components to improving short-term forecasting are additional atmospheric/surface state predictors and the 4-yr training sample size. Significance StatementMachine learning methods have great potential and are beginning to be widely applied in meteorology in recent years. A new technique called natural gradient boosting (NGB) has been released and used in this paper to refine the probabilistic forecast of surface temperature. It was found that the NGB has better prediction skills than the traditional ensemble model output statistics in forecasting 1 and 2 days in advance. The NGB has similar prediction skills with lower computational demands compared to other advanced machine learning methods such as the quantile random forests. We showed a path to employ the NGB method in this task, which can be followed for refining other and more challenging meteorological variables such as wind speed or precipitation. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2024 Elektronická adresa https://journals.ametsoc.org/view/journals/wefo/38/1/WAF-D-22-0006.1.xml
Počet záznamů: 1