The atmospheric boundary layer undergoes transitions between stable and convective states. Over land, in undisturbed conditions, these transitions occur daily in the morning and late afternoon or early evening. Though less well studied and presenting more challenges than the fully stable and fully convective states, such transitions have been the subject of growing interest over the last few decades. During transitions, all forcings are weak, and few simplifications are possible. Factors such as terrain, radiation, advection, and subsidence can seldom be safely neglected. Here, we review research on transitions over recent decades, with an emphasis on work published in Boundary-Layer Meteorology. The review is brief and inevitably reflects the interests and views of the authors.

中文翻译：

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陆地上昼夜变化的大气边界层的过渡期

大气边界层经历稳定状态和对流状态之间的转变。在陆地上，在不受干扰的条件下，这些转变每天发生在早上和傍晚或傍晚。尽管与完全稳定和完全对流状态相比，研​​究较少并且提出了更多挑战，但这种转变在过去几十年中一直是人们越来越感兴趣的主题。在过渡期间，所有强迫都是微弱的，几乎不可能进行简化。地形、辐射、平流和沉降等因素很少能被安全地忽略。在这里，我们回顾了近几十年来关于过渡的研究，重点是发表在边界层气象学上的工作。评论简短，不可避免地反映了作者的兴趣和观点。