The Impact of Radiosounding Observations on Numerical Weather Prediction Analyses in the Arctic

The Impact of Radiosounding Observations on Numerical Weather Prediction Analyses in the Arctic
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无线电探测观测对北极数值天气预报分析的影响

DOI:
10.1029/2019gl083332
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发表时间:
2019
影响因子:
5.2
通讯作者:
Naakka T
Naakka T
中科院分区:
地球科学1区
文献类型:
--
作者:
Naakka T

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北极地区的无线电探空网络尽管稀疏,但却是用于天气预测和再分析的大气观测系统的重要组成部分。使用数值天气预报模型评估了网络的空间覆盖范围,将北极陆地站和北冰洋中部探险队的无线电探空仪观测结果与欧洲中期天气预报中心2016年1月至2018年9月的业务分析和背景场(12小时预报)进行了比较。结果表明,探空资料对分析结果的影响具有较大的地理差异。在数据稀疏的地区,如北冰洋中部,高质量的无线电探空仪观测大大改善了分析,而卫星观测无法弥补无线电探空网络中的巨大空间差距。在网络相当密集的地区,背景场的质量与如何在同化中利用无线电探空仪观测以及这些观测的质量更相关。
The radiosounding network in the Arctic, despite being sparse, is a crucial part of the atmospheric observing system for weather prediction and reanalysis. The spatial coverage of the network was evaluated using a numerical weather prediction model, comparing radiosonde observations from Arctic land stations and expeditions in the central Arctic Ocean with operational analyses and background fields (12‐hr forecasts) from European Centre for Medium‐Range Weather Forecasts for January 2016 to September 2018. The results show that the impact of radiosonde observations on analyses has large geographical variation. In data‐sparse areas, such as the central Arctic Ocean, high‐quality radiosonde observations substantially improve the analyses, while satellite observations are not able to compensate for the large spatial gap in the radiosounding network. In areas where the network is reasonably dense, the quality of background field is more related to how radiosonde observations are utilized in the assimilation and to the quality of those observations.
比较两种评估观察影响的方法
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发表时间: 2013
影响因子: 3.2
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