Marcus SL, Chao Y, Dickey JO, Gegout P
Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 USA.
Science. 1998 Sep 11;281(5383):1656-9. doi: 10.1126/science.281.5383.1656.
Subdecadal changes in Earth's rotation rate, and hence in the length of day (LOD), are largely controlled by variations in atmospheric angular momentum. Results from two oceanic general circulation models (OGCMs), forced by observed wind stress and heat flux for the years 1992 through 1994, show that ocean current and mass distribution changes also induce detectable LOD variations. The close similarity of axial oceanic angular momentum (OAM) results from two independent OGCMs, and their coherence with LOD, demonstrate that global ocean models can successfully capture the large-scale circulation changes that drive OAM variability on seasonal and shorter time scales.
地球自转速率的年代际以下变化，进而日长（LOD）的变化，在很大程度上受大气角动量变化的控制。两个海洋环流模型（OGCMs）的结果显示，洋流和质量分布变化也会引起可检测到的日长变化。这两个模型在1992年至1994年期间由观测到的风应力和热通量驱动。来自两个独立海洋环流模型的轴向海洋角动量（OAM）结果非常相似，并且它们与日长具有一致性，这表明全球海洋模型能够成功捕捉到在季节和更短时间尺度上驱动海洋角动量变化的大规模环流变化。
