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	Decade 1km resolution monthly temperature data for China
	Feng Min; Yang Yaping
	2013
会议名称	2013 21st International Conference on Geoinformatics, Geoinformatics 2013, June 20, 2013 - June 22, 2013
会议地点	Kai Feng, China
关键词	Estimation Meteorology Temperature
页码	1878-1884
英文摘要	Air temperature near the surface is an important controlling parameter for land surface processes, and is crucial to ecological, environmental, and hydrological modeling. Temperature records observed at meteorological stations have been widely used, but there has been an increasing need for temperature data in grid for modeling especially those using remote sensing data. Although grid temperature can be estimated from in-situ temperature records using interpolation algorithm, low accuracy has been found in the estimation due to limited ground stations, especially when there were insufficient sites to represent all land cover types and terrain conditions in the area. NCEP/NCAR reanalysis project produced climate variables uses a frozen state-of-art global data assimilation system and a database as complete as possible. Although resolution of the NCEP data has a coarse resolution (0.5 degree), it provides global, consistent, and long term estimation of climate variables. This paper presents a downscaling approach for deriving monthly temperature at 1km resolution from the NCEP by utilizing derived relationships between monthly aggregated NCEP temperature and other ground elements, such as terrain, vegetation, and geographic locations. Regression tree model was chosen for detecting the possible relationships. Monthly temperature with 1km resolution for China land area has been produced using the approach. The final predicted temperatures were compared with observed records at 380 meteorological stations in China. The results indicated that the downscaled estimations can represent the spatial distribution and trends and the magnitude of temperature in inter-month, with R ranging from 0.861 to 0.948, and RMSE from 1.88C to 2.681C. 2013 IEEE.
收录类别	EI
会议录出版者	IEEE Computer Society
语种	英语
ISSN号	2161024X
内容类型	会议论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/31016]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Feng Min,Yang Yaping. Decade 1km resolution monthly temperature data for China[C]. 见:2013 21st International Conference on Geoinformatics, Geoinformatics 2013, June 20, 2013 - June 22, 2013. Kai Feng, China.

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