Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China
Abstract Precipitation products with high resolution for urban areas remain an important and challenging issue. The main purposes of this study are to evaluate the accuracy of the China Meteorological Forcing Data Set (CMFD) in the Shanghai megacity and to improve the accuracy of the CMFD precipitat...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Geophysical Union (AGU)
2023-03-01
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| Series: | Earth and Space Science |
| Online Access: | https://doi.org/10.1029/2022EA002690 |
| _version_ | 1797857337054068736 |
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| author | Nuo Lei Zhengzheng Zhou Qi Zhuang Wenling Chen Sergey Chalov Shuguang Liu Lisha Gao Guangtao Dong |
| author_facet | Nuo Lei Zhengzheng Zhou Qi Zhuang Wenling Chen Sergey Chalov Shuguang Liu Lisha Gao Guangtao Dong |
| author_sort | Nuo Lei |
| collection | DOAJ |
| description | Abstract Precipitation products with high resolution for urban areas remain an important and challenging issue. The main purposes of this study are to evaluate the accuracy of the China Meteorological Forcing Data Set (CMFD) in the Shanghai megacity and to improve the accuracy of the CMFD precipitation. With the rain gauge observations for the 2013–2018 period, we evaluate the error and detection ability of CMFD at the sub‐daily, daily, and monthly scales, and examine the spatial variation of CMFD performance over the region. The Geographic Differential Analysis (GDA) method is used to calibrate the CMFD precipitation data set. The results show that the performance of CMFD precipitation varies from sub‐daily to monthly time scales with better accuracy at the monthly scale in the study region. The CMFD can capture the spatial variability over the region with less error in the north and outliers in the center. The GDA‐based calibration framework can significantly improve the capability of CMFD products, especially at the sub‐daily and daily scales. The calibrated CMFD can provide reliable precipitation estimates and capture more extreme precipitation events. The improved CMFD products can provide a key basis for applications related to hydrological and meteorological hazard monitoring and assessment in the Shanghai area. The overall framework is scalable and could be readily generalized to other regions, and the calibrated product can be used in the research of urban natural disaster risks and other studies. |
| first_indexed | 2024-04-09T20:56:06Z |
| format | Article |
| id | doaj.art-2471a75a6e2f4974b429715b34082fdb |
| institution | Directory Open Access Journal |
| issn | 2333-5084 |
| language | English |
| last_indexed | 2024-04-09T20:56:06Z |
| publishDate | 2023-03-01 |
| publisher | American Geophysical Union (AGU) |
| record_format | Article |
| series | Earth and Space Science |
| spelling | doaj.art-2471a75a6e2f4974b429715b34082fdb2023-03-29T19:08:35ZengAmerican Geophysical Union (AGU)Earth and Space Science2333-50842023-03-01103n/an/a10.1029/2022EA002690Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, ChinaNuo Lei0Zhengzheng Zhou1Qi Zhuang2Wenling Chen3Sergey Chalov4Shuguang Liu5Lisha Gao6Guangtao Dong7Department of Hydraulic Engineering Tongji University Shanghai ChinaDepartment of Hydraulic Engineering Tongji University Shanghai ChinaDepartment of Hydraulic Engineering Tongji University Shanghai ChinaSchool of Environmental Studies China University of Geosciences Wuhan ChinaFaculty of Geography Lomonosov Moscow State University Moscow RussiaDepartment of Hydraulic Engineering Tongji University Shanghai ChinaShanghai Water Planning and Design Research Institute (Shanghai Ocean Planning and Design Research Institute) Shanghai ChinaKey Laboratory of Cities' Mitigation and Adaptation to Climate Change in Shanghai China Meteorological Administration Shanghai ChinaAbstract Precipitation products with high resolution for urban areas remain an important and challenging issue. The main purposes of this study are to evaluate the accuracy of the China Meteorological Forcing Data Set (CMFD) in the Shanghai megacity and to improve the accuracy of the CMFD precipitation. With the rain gauge observations for the 2013–2018 period, we evaluate the error and detection ability of CMFD at the sub‐daily, daily, and monthly scales, and examine the spatial variation of CMFD performance over the region. The Geographic Differential Analysis (GDA) method is used to calibrate the CMFD precipitation data set. The results show that the performance of CMFD precipitation varies from sub‐daily to monthly time scales with better accuracy at the monthly scale in the study region. The CMFD can capture the spatial variability over the region with less error in the north and outliers in the center. The GDA‐based calibration framework can significantly improve the capability of CMFD products, especially at the sub‐daily and daily scales. The calibrated CMFD can provide reliable precipitation estimates and capture more extreme precipitation events. The improved CMFD products can provide a key basis for applications related to hydrological and meteorological hazard monitoring and assessment in the Shanghai area. The overall framework is scalable and could be readily generalized to other regions, and the calibrated product can be used in the research of urban natural disaster risks and other studies.https://doi.org/10.1029/2022EA002690 |
| spellingShingle | Nuo Lei Zhengzheng Zhou Qi Zhuang Wenling Chen Sergey Chalov Shuguang Liu Lisha Gao Guangtao Dong Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China Earth and Space Science |
| title | Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China |
| title_full | Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China |
| title_fullStr | Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China |
| title_full_unstemmed | Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China |
| title_short | Performance Evaluation and Improvement of CMFD's Precipitation Products Over Shanghai City, China |
| title_sort | performance evaluation and improvement of cmfd s precipitation products over shanghai city china |
| url | https://doi.org/10.1029/2022EA002690 |
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