太湖流域雷达雨量数据水平尺度的选取

被引:2
作者
高玉芳 [1 ]
陈耀登 [1 ]
蒋义芳 [2 ]
彭涛 [3 ]
袁士友 [4 ]
机构
[1] 南京信息工程大学江苏省农业气象重点实验室/应用气象学院
[2] 江苏省气象台
[3] 中国气象局武汉暴雨研究所/暴雨监测预警湖北省重点实验室
[4] 黄山机场气象台
关键词
应用气象学; 水平尺度; FSS方法; 雷达雨量数据;
D O I
10.16032/j.issn.1004-4965.2015.03.013
中图分类号
P412.25 [雷达探测];
学科分类号
0706 ; 070601 ;
摘要
由于雷达局部雨量位置存在误差,使得高分辨的雷达雨量数据在实际应用(如水文模拟)中效果不一定更好。因此,在空间邻域内而不是网格尺度上,分析雷达雨量数据与雨量站雨量数据的接近程度,选取合适的水平尺度可降低雷达雨量及其位置误差对水文模拟的影响,在改善雷达雨量数据的应用效果方面具有重要意义。采用FSS(Fraction Score Skill)方法,以太湖流域2007—2010年5个时次的雷达雨量数据为研究对象,以FSS技能得分作为评估指标,研究雷达雨量数据水平尺度的选取。结果表明,在水平尺度为5~70 km范围内,雷达雨量数据与雨量站数据较接近,雷达估测降雨量的技能得分FSS值可达到目标精度FSSuniform,这对雷达估测降雨应用于流域洪水预报等方面有重要意义。
引用
收藏
页码:417 / 423
页数:7
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