当前位置: X-MOL 学术Ocean Dyn. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
On the assessment of Argo float trajectory assimilation in the Mediterranean Forecasting System.
Ocean Dynamics ( IF 2.2 ) Pub Date : 2011-06-05 , DOI: 10.1007/s10236-011-0437-0
Jenny A U Nilsson 1 , Srdjan Dobricic 2 , Nadia Pinardi 3 , Vincent Taillandier 4 , Pierre-Marie Poulain 5
Affiliation  

The Mediterranean Forecasting System (MFS) has been operational for a decade, and is continuously providing forecasts and analyses for the region. These forecasts comprise local- and basin-scale information of the environmental state of the sea and can be useful for tracking oil spills and supporting search-and-rescue missions. Data assimilation is a widely used method to improve the forecast skill of operational models and, in this study, the three-dimensional variational (OceanVar) scheme has been extended to include Argo float trajectories, with the objective of constraining and ameliorating the numerical output primarily in terms of the intermediate velocity fields at 350 m depth. When adding new datasets, it is furthermore crucial to ensure that the extended OceanVar scheme does not decrease the performance of the assimilation of other observations, e.g., sea-level anomalies, temperature, and salinity. Numerical experiments were undertaken for a 3-year period (2005–2007), and it was concluded that the Argo float trajectory assimilation improves the quality of the forecasted trajectories with ~15%, thus, increasing the realism of the model. Furthermore, the MFS proved to maintain the forecast quality of the sea-surface height and mass fields after the extended assimilation scheme had been introduced. A comparison between the modeled velocity fields and independent surface drifter observations suggested that assimilating trajectories at intermediate depth could yield improved forecasts of the upper ocean currents.

中文翻译:

在地中海预报系统中对Argo漂浮轨迹同化的评估。

地中海预报系统(MFS)已经运行了十年,并且一直在为该地区提供预报和分析。这些预报包括海洋环境状况的本地和流域尺度信息,对于跟踪溢油事故和支持搜救任务很有用。数据同化是提高操作模型的预测技能的一种广泛使用的方法,在本研究中,三维变分(OceanVar)方案已扩展为包括Argo浮点轨迹,其目的主要是限制和改善数值输出在350 m深度的中间速度场方面。在添加新数据集时,此外,至关重要的是要确保扩展的OceanVar方案不会降低其他观测值(例如海平面异常,温度和盐度)的同化性能。进行了为期3年(2005-2007年)的数值实验,得出的结论是Argo浮点轨迹同化将预测轨迹的质量提高了15%,从而提高了模型的真实性。此外,在引入扩展同化方案之后,MFS被证明可以保持海面高度和质量场的预测质量。在模拟的速度场和独立的表面漂移观测资料之间进行的比较表明,对中等深度的轨迹进行同化可以提高对上洋流的预报。温度和盐度。进行了为期3年(2005-2007年)的数值实验,得出的结论是Argo浮点轨迹同化将预测轨迹的质量提高了15%,从而提高了模型的真实性。此外,在引入扩展同化方案之后,MFS被证明可以保持海面高度和质量场的预测质量。在模拟的速度场和独立的表面漂移观测值之间进行的比较表明,在中等深度吸收轨迹可以提高对上洋流的预报。温度和盐度。进行了为期3年(2005-2007年)的数值实验,得出的结论是Argo浮点轨迹同化将预测轨迹的质量提高了15%,从而提高了模型的真实性。此外,在引入扩展同化方案后,MFS被证明可以保持海面高度和质量场的预测质量。在模拟的速度场和独立的表面漂移观测资料之间进行的比较表明,对中等深度的轨迹进行同化可以提高对上洋流的预报。结论是Argo浮点轨迹同化将预测轨迹的质量提高了约15%,从而提高了模型的真实性。此外,在引入扩展同化方案之后,MFS被证明可以保持海面高度和质量场的预测质量。在模拟的速度场和独立的表面漂移观测资料之间进行的比较表明,对中等深度的轨迹进行同化可以提高对上洋流的预报。结论是Argo浮点轨迹同化将预测轨迹的质量提高了约15%,从而提高了模型的真实性。此外,在引入扩展同化方案之后,MFS被证明可以保持海面高度和质量场的预测质量。在模拟的速度场和独立的表面漂移观测资料之间进行的比较表明,对中等深度的轨迹进行同化可以提高对上洋流的预报。
更新日期:2011-06-05
down
wechat
bug