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天津市基于新标准的空气质量预报模型效果评估
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摘要
利用2015年环境空气质量监测数据,对天津市OPAQ空气质量统计预报模型预测效果进行验证评估。结果表明,模型对天津市AQI和PM_(2.5)、PM_(10)、O_3、NO_2浓度的预测结果与实测结果具有较好的趋势一致性,预测时间越临近,拟合度越好,相关性越高。对PM_(2.5)的预报性能明显优于PM_(10)、O_3和NO_2,正负偏差分布均匀,但重污染预测值偏低;O_3和NO_2浓度预测呈明显负偏差,O_3峰值浓度预测不足,NO_2预测整体偏低,以24小时预报趋势性最好,但负偏差最为突出。
引文
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