北京区域环境气象数值预报系统及PM预报检验

被引:40
作者
赵秀娟 [1 ,2 ]
徐敬 [1 ,2 ]
张自银 [2 ]
张小玲 [1 ,2 ]
范水勇 [1 ]
苏捷 [2 ]
机构
[1] 中国气象局北京城市气象研究所
[2] 京津冀环境气象预报预警中心
关键词
环境气象; PM2.5浓度; 能见度; 预报检验;
D O I
暂无
中图分类号
X51 [大气污染及其防治]; P456.7 [数值预报方法];
学科分类号
0706 ; 070602 ; 070601 ;
摘要
基于北京地区快速更新循环同化预报系统(BJ-RUC)、WRF-Chem模式和优选的能见度参数化方案,建立了北京区域环境气象数值预报系统。对2014年全年PM2.5浓度、能见度和APEC(Asia-Pacific Economic Cooperation)期间预报效果检验结果表明:该系统对京津冀及周边地区PM2.5浓度的预报效果较好,大部分站点的相关系数在0.6以上,特别足北京的部分站点可达0.8以上,预报结果相比观测总体偏低,随着预报时效的延长,24 h之后预报效果略有下降。相比人工观测,能见度预报结果与自动观测能见度更加接近,对持续性低能见度过程预报与实况吻合较好,对于小时能见度低于10 km的分级检验显示,预报准确率从77%左右逐级下降,2 km以下在40%左右。2014年APEC期间,系统很好地预报出北京地区空气质量指数、PM2.5浓度和能见度的时空演变特征,为APEC期间环境气象预报服务提供了有力的技术支撑。
引用
收藏
页码:160 / 172
页数:13
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