摘要
为分析气候变量的空间分布,本文以高斯权重插值法为基础,设计了一个考虑地形因子的改进方案,结合Barnes订正法,给出了相应的误差订正方案和逐步订正方案,并得到地面温度场。分析表明,这是一种简明、精度较高且与地形吻合较好的复杂地形条件下温度空间分析方案。同时,本文提出将参与插值的要素统一到同一高度并考虑地形特点以消除地形影响的降水空间分析方案,也有较好的效果;本文还研究了不同空间分辨率时气候要素的空间分析结果,表明研究长江流域水文过程采用4km分辨率为宜。
Based on the Gauss weighted interpolation, in this paper, an improved project considering terrain factors has been brought forward, at the same time, with the correction project performed by Barnes, the corresponding error correction project and stepwise correction project have been given and the ground temperature field has been obtained. The analyzed results show that it is a concise,precise project and well fitted with terrain spatial interpolation project of temperature under complicated terrain conditions. For eliminating the effect on precipitation from terrains, the project that all the elements concerned with the interpolation are unified on the same height and the terrain characteristics are taken into account has been put forward, which also displays a better effect. Furthermore, the results analyzed spatially of the climatic elements under the different special resolution have been investigated , which denotes that the resolution of 4km is the most suitable for the research on the hydrologic processes of the Changjiang River drainage area and is prone to coupling with the regional climatic model.
出处
《科技导报》
CAS
CSCD
2004年第8期42-46,共5页
Science & Technology Review
基金
获国家重点基础研究(973)项目(2001CB309404)
海外杰出青年合作项目(40128001/D05)
国家自然科学基金项目(49375248)
浙江省科研(C33)项目(2004C33082)
