The Accuracy of Trajectories during ANATEX Calculated Using Dynamic Model Analyses Versus Rawinsonde Observations
The Accuracy of Trajectories during ANATEX Calculated Using Dynamic Model Analyses Versus Rawinsonde Observations
复制标题
使用动态模型分析计算的 ANATEX 轨迹精度与 Rawinsonde 观测结果的比较
DOI：
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发表时间：
1991
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影响因子：
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通讯作者：
R. Draxler
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作者：
R. Draxler
摘要 在跨北美实验 (ANATEX) 期间，飞机示踪剂测量均在释放地点 300 公里范围内进行，提供了 30 次单独的试验来评估后向轨迹计算的误差。轨迹计算使用来自 NOAA 预测嵌套网格模型 (NGM) 的动态模型输出气象数据以及来自 4 天罗文探空仪或 2 天罗文探空仪观测的可比网格气象场。在所有试验中，使用不同气象输入数据的轨迹精度没有明显差异；绝对轨迹误差范围为行进距离的20%至30%。当轨迹被分为相似的类别时，NGM 数据提供了但当存在较小规模的流动特征时的结果；那些在rawinsonde网络中无法解决的问题。当示踪剂释放附近存在锋面或低压系统时，四天的罗文探空仪数据提供了最佳结果。更多家庭的运输速度较慢...
Abstract Aircraft tracer measurements all made within 300 km of the release sites during, the Across North America Experiment (ANATEX) provided 30 separate trials to evaluate the error of back-trajectory calculations. The trajectory calculations used dynamic-model-output meteorological data from the NOAA prognostic Nested Grid Model (NGM) and from comparable gridded meteorological fields from 4-day rawinsonde or 2-day rawinsonde observations. Over all trials, no significant difference was discernable in trajectory accuracy using the different meteorological input data; absolute trajectory error ranged from 20% to 30% of the travel distance. When the trajectories were grouped into similar categories, the NGM data provided the but results when smaller-scale flow features were present; ones that could not be resolved in the rawinsonde network. Four-day rawinsonde data provided the best results when fronts or low pressure systems were present in the vicinity of the tracer release. Slower transport in more hom...