Uncertainty analysis of atmospheric friction torque on the solid Earth

详细信息    查看全文

• 作者：Haoming Yan^a ; ^{yhm@whigg.ac.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yong Huang^a ; ^b ; ^c
• 关键词：Uncertainty ; Wind stress ; Friction ; Torque ; Earth's rotation ; Annual amplitude ; Spectrum
• 刊名：Geodesy and Geodynamics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：7
• 期：3
• 页码：165-170
• 全文大小：1283 K

文摘

The wind stress acquired from European Centre for Medium-Range Weather Forecasts (ECMWF), National Centers for Environmental Prediction (NCEP) climate models and QSCAT satellite observations are analyzed by using frequency-wavenumber spectrum method. The spectrum of two climate models, i.e., ECMWF and NCEP, is similar for both 10 m wind data and model output wind stress data, which indicates that both the climate models capture the key feature of wind stress. While the QSCAT wind stress data shows the similar characteristics with the two climate models in both spectrum domain and the spatial distribution, but with a factor of approximately 1.25 times larger than that of climate models in energy. These differences show the uncertainty in the different wind stress products, which inevitably cause the atmospheric friction torque uncertainties on solid Earth with a 60% departure in annual amplitude, and furtherly affect the precise estimation of the Earth's rotation.