CWRF模式在中国夏季极端降水模拟的误差订正
利用1980-2015年6-8月我国逐日降水观测数据评估CWRF模式(Climate-Weather Research and Forecasting model)多种参数化方案对我国夏季日降水的模拟能力,并考察累积概率变换偏差订正法(CDFt)的订正效果.通过将广义帕累托分布(GPD)引入到偏差订正模型中,提出针对极端降水的累积概率变换偏差订正法(XCDFt),检验和评估其对极端降水订正的适用性.结果显示:CWRF模式微物理过程选用Morrison-aerosol参数化方案组合对我国降水场的模拟较好,CDFt订正效果良好;XCDFt偏差订正模型能够较好地提取模式建模与验证时期变化信号,订正后...
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Published in | 应用气象学报 Vol. 30; no. 2; pp. 223 - 232 |
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Main Authors | , , , |
Format | Journal Article |
Language | Chinese |
Published |
美国马里兰大学地球系统科学多学科中心,马里兰20740
01.03.2019
南京信息工程大学气象灾害教育部重点实验室,南京,210044%南京信息工程大学气象灾害教育部重点实验室,南京210044 |
Subjects | |
Online Access | Get full text |
ISSN | 1001-7313 |
DOI | 10.11898/1001-7313.20190209 |
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Abstract | 利用1980-2015年6-8月我国逐日降水观测数据评估CWRF模式(Climate-Weather Research and Forecasting model)多种参数化方案对我国夏季日降水的模拟能力,并考察累积概率变换偏差订正法(CDFt)的订正效果.通过将广义帕累托分布(GPD)引入到偏差订正模型中,提出针对极端降水的累积概率变换偏差订正法(XCDFt),检验和评估其对极端降水订正的适用性.结果显示:CWRF模式微物理过程选用Morrison-aerosol参数化方案组合对我国降水场的模拟较好,CDFt订正效果良好;XCDFt偏差订正模型能够较好地提取模式建模与验证时期变化信号,订正后相比订正前与观测极端降水的概率分布更为接近;经过XCDFt订正后华南、华中和华北地区20年一遇的极端降水重现水平较模拟值更接近观测值,可为CWRF模式提高极端降水的业务预测水平提供参考. |
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AbstractList | 利用1980-2015年6-8月我国逐日降水观测数据评估CWRF模式(Climate-Weather Research and Forecasting model)多种参数化方案对我国夏季日降水的模拟能力,并考察累积概率变换偏差订正法(CDFt)的订正效果.通过将广义帕累托分布(GPD)引入到偏差订正模型中,提出针对极端降水的累积概率变换偏差订正法(XCDFt),检验和评估其对极端降水订正的适用性.结果显示:CWRF模式微物理过程选用Morrison-aerosol参数化方案组合对我国降水场的模拟较好,CDFt订正效果良好;XCDFt偏差订正模型能够较好地提取模式建模与验证时期变化信号,订正后相比订正前与观测极端降水的概率分布更为接近;经过XCDFt订正后华南、华中和华北地区20年一遇的极端降水重现水平较模拟值更接近观测值,可为CWRF模式提高极端降水的业务预测水平提供参考. |
Author | 马圆 梁信忠 董晓云 余锦华 |
AuthorAffiliation | 南京信息工程大学气象灾害教育部重点实验室,南京,210044%南京信息工程大学气象灾害教育部重点实验室,南京210044;美国马里兰大学地球系统科学多学科中心,马里兰20740 |
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Author_FL | Yu Jinhua Dong Xiaoyun Ma Yuan Liang Xinzhong |
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DocumentTitle_FL | Bias Correction of Summer Extreme Precipitation Simulated by CWRF Model over China |
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Title | CWRF模式在中国夏季极端降水模拟的误差订正 |
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