基于ERA5产品和BPNN的郑州加权平均温度模型

朱洪江; 刘晨

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基于ERA5产品和BPNN的郑州加权平均温度模型

更新时间：2025-11-25

- 基于ERA5产品和BPNN的郑州加权平均温度模型
- Vol. 21, Issue 3, Pages: 77-79(2023)
- 作者机构：
  
  1. 河南省测绘院
  2. 武汉大学测绘学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： P426;P228.4
- Published：2023
- 稿件说明：
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朱洪江, 刘晨. 基于ERA5产品和BPNN的郑州加权平均温度模型[J]. 2023, 21(3): 77-79.
DOI：

朱洪江, 刘晨. 基于ERA5产品和BPNN的郑州加权平均温度模型[J]. 2023, 21(3): 77-79. DOI：

摘要

加权平均温度（Tm）决定天顶湿延迟（ZWD）向可降水量（PWV）产品转化的精度，是GNSS气象学（GNSS-MET）中的关键参量之一。常规Tm模型存在精度差和分辨率低的问题，因此根据2018—2019年逐小时气压级欧洲中尺度气象预报中心第五代再分析产品（ERA5）导出的Tm数据集，采用误差反向传播（BP）神经网络，建立了郑州Tm模型（ZTM）；再利用2020年的ERA5-Tm测试了ZTM的预测性能。结果表明，与广泛使用的第三代全球气压温度模型相比，ZTM的RMSE由12.0 K降至4.2 K，性能提升了65%。未来，ZTM的应用将有望提升郑州地区PWV产品的可靠性。

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