A Study on Spatial Interpolation of Temperature in Anhui Province Based on ANUSPLIN

• 作者: Chen Fengjiao Li Jun Qiu Kangjun Wang Gen Wen Huayang
• 来源期刊: 气象与环境研究:英文版
• 学科: 地球科学
• 关键词: TEMPERATURE INTERPOLATION ANUSPLIN THIN plate SMOOTHING SPLINE
• 年，卷（期）: 2019,（2）
• 页码范围: 51-55
• 页数: 5页
• 分类号: P423

摘要

To achieve refined temperature grid data with high accuracy and high spatial resolution,hourly temperature grid dataset with spatial resolution of 1 km in Anhui Province from January to December in 2016 was established using the ANUSPLIN thin plate spline algorithm,which meets the needs of climate change research and meteorological disaster risk assessment. And the interpolation error was analyzed. The results show that the interpolated values of hourly temperature by ANUSPLIN are close to the observed values in 2016. The error is generally below 1. 5 ℃,and the root mean square error is 0. 937 6 ℃. On monthly scale,the interpolated values of hourly temperature by ANUSPLIN are also close to the observed values.In October,November,June and May,the interpolation accuracy is the highest,and the proportion of absolute error of hourly temperature lower than 2 ℃ is up to 99%,97. 4%,98. 1% and 97. 4% respectively. In February,March,August and December,the interpolation accuracy is the lowest,and the proportion of absolute error higher than 2 ℃ is 8. 1%,5. 3%,4. 1% and 4. 2% respectively. Due to the effect of complex topography in Anhui,the interpolation accuracy is the lowest in the mountainous areas of southern and western Anhui,and the interpolation error in these regions even exceeds 1. 5 ℃ annually and 1. 8 ℃ monthly.