Study of a dynamic downscaling scheme for quantitative precipitation forecasting

Dynamic downscaling is the best way to get high resolution quantitative precipitation forecasts. The Weather Research and Forecasting Model (WRF) was utilized as a dynamic downscaling tool in this study. The influence of the horizontal resolutions and the model domains on precipitation forecasts has...

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Main Authors: Y. Li, G. H. Lu, Z. Y. Wu, J. Shi
Format: Article
Language:English
Published: Copernicus Publications 2015-05-01
Series:Proceedings of the International Association of Hydrological Sciences
Online Access:https://www.proc-iahs.net/368/108/2015/piahs-368-108-2015.pdf
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author Y. Li
G. H. Lu
Z. Y. Wu
J. Shi
author_facet Y. Li
G. H. Lu
Z. Y. Wu
J. Shi
author_sort Y. Li
collection DOAJ
description Dynamic downscaling is the best way to get high resolution quantitative precipitation forecasts. The Weather Research and Forecasting Model (WRF) was utilized as a dynamic downscaling tool in this study. The influence of the horizontal resolutions and the model domains on precipitation forecasts has been analysed to establish an optimized dynamic downscaling scheme. Three precipitation events over Xijiang basin, China, were simulated with different horizontal resolutions and domains. The results indicate that both the horizontal resolution and model domain have an influence on the precipitation forecast. However, the correlation between high precipitation forecast accuracy and the high horizontal resolution or the large model domain were not very strong. Comprehensive consideration of the results shows that the accuracy of forecast is best when the horizontal resolution is 20-km. Although the model domain size has no significant influence on the precipitation forecast, a larger domain may improve the stability of forecasting.
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spelling doaj.art-aee89c7b304e449ea367562f184f7e8e2022-12-22T02:04:12ZengCopernicus PublicationsProceedings of the International Association of Hydrological Sciences2199-89812199-899X2015-05-0136810811310.5194/piahs-368-108-2015Study of a dynamic downscaling scheme for quantitative precipitation forecastingY. Li0G. H. Lu1Z. Y. Wu2J. Shi3College of Hydrology and Water Resources, Hohai University, Nanjing, Jiangsu Province, 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing, Jiangsu Province, 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing, Jiangsu Province, 210098, ChinaHenan Electric Power Survey & Design Institute, Zhengzhou, Henan Province, 450007, ChinaDynamic downscaling is the best way to get high resolution quantitative precipitation forecasts. The Weather Research and Forecasting Model (WRF) was utilized as a dynamic downscaling tool in this study. The influence of the horizontal resolutions and the model domains on precipitation forecasts has been analysed to establish an optimized dynamic downscaling scheme. Three precipitation events over Xijiang basin, China, were simulated with different horizontal resolutions and domains. The results indicate that both the horizontal resolution and model domain have an influence on the precipitation forecast. However, the correlation between high precipitation forecast accuracy and the high horizontal resolution or the large model domain were not very strong. Comprehensive consideration of the results shows that the accuracy of forecast is best when the horizontal resolution is 20-km. Although the model domain size has no significant influence on the precipitation forecast, a larger domain may improve the stability of forecasting.https://www.proc-iahs.net/368/108/2015/piahs-368-108-2015.pdf
spellingShingle Y. Li
G. H. Lu
Z. Y. Wu
J. Shi
Study of a dynamic downscaling scheme for quantitative precipitation forecasting
Proceedings of the International Association of Hydrological Sciences
title Study of a dynamic downscaling scheme for quantitative precipitation forecasting
title_full Study of a dynamic downscaling scheme for quantitative precipitation forecasting
title_fullStr Study of a dynamic downscaling scheme for quantitative precipitation forecasting
title_full_unstemmed Study of a dynamic downscaling scheme for quantitative precipitation forecasting
title_short Study of a dynamic downscaling scheme for quantitative precipitation forecasting
title_sort study of a dynamic downscaling scheme for quantitative precipitation forecasting
url https://www.proc-iahs.net/368/108/2015/piahs-368-108-2015.pdf
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AT jshi studyofadynamicdownscalingschemeforquantitativeprecipitationforecasting