Lower boundary condition with topography and land sea contrast can producequasi stationary waves which in turn could force the AO.
而山脉和海陆分布热力差异等下边界条件是强迫准定常波的主要来源。 不同下边界条件通过强迫不同准定常波对AO产生影响。
参考来源 - 下边界条件对北极涛动影响的数值模拟研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The time integrating of the model was carried out by taking the topography forcing as the lower boundary condition.
用此模式对地形强迫为下边界条件进行时间积分。
Perhaps the threshold for attaining a diagnosis of ADHD will be lower for your children: it's a condition, like many others, with a notably flexible diagnostic boundary.
也许对你的孩子来说确诊为ADHD的界限会降低：这是一种病症，和许多其他病症一样，确诊界限有着很大的弹性。
The time-dependent ion transport equations were numerically solved along fixed magnetic flux tubes. The lower boundary (100km) condition is set to chemical equilibrium.
模型的地理轴和地磁轴是分开的，离子的输运方程沿固定的磁流管求解。
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