| 中国区域高分辨率温度实况融合格点分析产品质量评估 |
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| 引用本文： | 龙柯吉,师春香,韩帅,等.中国区域高分辨率温度实况融合格点分析产品质量评估[J].高原山地气象研究,2019,39(3):67-74. |
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| 作者姓名： | 龙柯吉 师春香 韩帅 等 |
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| 作者单位： | 1. 四川省气象台, 成都 610072; |
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| 基金项目： | 高原与盆地暴雨旱涝灾害四川省重点实验室青年专项项目(SCQXKJQN2019018)气象预报业务关键技术发展专项(YBGJXM (2019)01-07)四川省重点实验室2018-重点-1。西南区域多源融合实况产品研究创新团队(西南气中[2018]13号)高原与盆地暴雨旱涝灾害四川省重点实验室青年专项项目(SCQXKJQN2019004) |
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| 摘 要： | 采用两种插值方法将2018年2m气温实况融合格点分析产品插值到2380个国家级考核站,通过相关系数、平均值误差、平均绝对误差、均方根误差及准确率等指标对该产品进行评估。结果表明:利用邻近插值法得到的评估结果略优于双线性插值法,实况融合格点分析产品的评估结果具有一定的日变化和月变化。总体而言,逐小时实况融合格点产品与站点实况基本一致,具有较高的参考性,其相关系数达到0.99以上,均方根误差在1℃以下,2℃以内准确率达到98%以上,1℃以内准确率达到95%以上。分省和分海拔评估结果表明,评估结果随海拔高度的增加而变差,因此在海拔较高、地形较复杂区域、气象站较稀疏区域应用该产品时应谨慎;由小时实况融合格点产品获得的日最高、最低温度也有很高的指示性;该产品对高温过程也有较好的监测能力。
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| 关 键 词： | 实况融合格点分析产品 气温 质量评估 插值方法 |
| 收稿时间： | 2019-08-11 |
Quality Assessment of High Resolution Temperature Merged Grid Analysis Product in China |
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| Institution: | 1. Sichuan Province Meteorological Observatory, Chengdu 610072, China;2. Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province, Chengdu 610072, China;3. National Meteorological Information Center, Beijing 100081, China;4. Sichuan Provincial Meteorological Observation and Data Centre, Chengdu 610072, China |
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| Abstract: | Two interpolation methods were used to interpolate the 2m air temperature merged grid analysis product in 2018 to 2380 national assessment stations.The product was evaluated by correlation coefficient,average error,average absolute error,root mean square error and accuracy.The results show that the assessment results obtained by using proximity interpolation method are slightly better than using bilinear interpolation method,and the assessment results of merged grid analysis product has certain diurnal and monthly changes.Overall,the hourly merged grid analysis product is basically the same as station observations,and has a high reference value,the correlation coefficient between them is above 0.99,the root mean square error is below 1℃,the accuracy within 2℃ is above 98%,and the accuracy within 1℃ is above 95%.The results of provincial and sub-elevation assessment show that the results of the assessment are worse with the increase of elevation,so caution should be taken when applying this product in areas with higher elevation,more complex terrain or sparse meteorological stations.The daily maximum and minimum air temperatures obtained by the hourly merged grid analysis product is also highly indicative;and the product also has good monitoring ability for high temperature process. |
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