| 区域积温插值的GIS方法 |
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| 引用本文： | 甄计国,赵军.区域积温插值的GIS方法[J].冰川冻土,2005,27(4):591-597. |
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| 作者姓名： | 甄计国 赵军 |
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| 作者单位： | 1. 甘肃省国土资源规划研究院,甘肃,兰州,730000
2. 西北师范大学,地理与环境科学学院,甘肃,兰州,730070 |
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| 基金项目： | 甘肃省自然科学基金
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甘肃省科技攻关项目 |
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| 摘 要： | 阐述了积温期分解对区域积温插值GIS方法的改进. 运用该方法对台站各旬日均温纪录进行分解, 得到>0 ℃期间的积温期长度与对应的气温下降累计值, 发现它们之间呈现很好的线性关系, 而积温值与积温期之间用指数回归拟合曲线代表更切合. 在气温垂直递减率的基础上, 用上述直线关系为参数, 构建基于GIS(ARC/INFO地理信息系统)GRID模块的插值方法, 依据高分辨率的DEM与台站海拔高度TIN之间的高度差进行高度订正以生成多山区域的积温数据库. 与改进前的GIS插值相比, 该方法可使甘肃省区域内积温插值的相对精度提高近3倍. 这种方法可以在甘肃省退耕还林还草等生态建设信息化管理中得到应用.
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| 关 键 词： | 积温 积温期 分解 海拔订正 GIS插值 |
| 文章编号： | 1000-0240(2005)04-0591-07 |
| 修稿时间： | 2004年11月22日 |
A GIS Method for Regional Accumulative Temperatures Interpolation |
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| ZHEN Ji-guo,ZHAO Jun.A GIS Method for Regional Accumulative Temperatures Interpolation[J].Journal of Glaciology and Geocryology,2005,27(4):591-597. |
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| Authors: | ZHEN Ji-guo ZHAO Jun |
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| Abstract: | This article suggests an improved GIS interpolation technique for regional accumulative air temperature, with a method of decomposition of duration of accumulative temperature. With the 10-day-mean temperature (0) from weather station records,it is found that a linear correlation exists between the derived temperature degree-decreased and the relevant duration, and a exponential regression relation between the accumulative temperature. Taking the above linear relation as parameters, and taking account the differences between DEM and the TIN for the metrological station elevations, and by applying the air temperature decrease rate with elevation increasing, a GIS method based on Arc/Info interpolation was developed, and the updated database for Gansu Province was generated, with an accuracy 3-times higher than that of the typical GIS interpolation results. |
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| Keywords: | accumulative temperature duration of accumulative temperature decomposition elevation effect correction regional GIS interpolation |
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