Progress in observing and modelling the urban boundary layer
Progress in observing and modelling the urban boundary layer
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DOI：
10.1016/j.uclim.2014.03.011
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发表时间：
2014-12-01
期刊：
影响因子：
6.4
通讯作者：
Barlow, Janet F.
中科院分区：
文献类型：
--
作者：
Barlow, Janet F.
城市边界层(UBL)是地球上大多数人现在居住的大气层的一部分，也是最复杂和最不被了解的小气候之一。鉴于潜在的气候变化影响和可持续发展城市的要求，对健全的模型和观测工具的需求变得迫切。本文从UBL结构和演化的微观尺度到中尺度决定因素的概念框架方面，综述了UBL的研究进展。在观测和模拟城市地表能量平衡方面取得了相当大的进展。城市粗糙度亚层是一个需要注意的重要区域，因为有关大气湍流的假设在这一层中被打破，由于其相当大的深度，它可能主导着地面与UBL的耦合。UBL的90%以上部分(混合层和残留层)仍未得到充分研究，但新的遥感方法和高分辨率建模工具现在可以迅速取得进展。从邻域到区域尺度上，地表非均质性占主导地位，在未来的研究中应该更多地考虑地表非均质性。具体的研究重点包括UBL内的湿度，高耸的城市树冠，以及与模型开发紧密结合的长期、空间上广泛的测量网络的发展。(C)2014年提交人。爱思唯尔出版公司(Elsevier B.V.)
The urban boundary layer (UBL) is the part of the atmosphere in which most of the planet's population now lives, and is one of the most complex and least understood microclimates. Given potential climate change impacts and the requirement to develop cities sustainably, the need for sound modelling and observational tools becomes pressing. This review paper considers progress made in studies of the UBL in terms of a conceptual framework spanning microscale to mesoscale determinants of UBL structure and evolution. Considerable progress in observing and modelling the urban surface energy balance has been made. The urban roughness sub-layer is an important region requiring attention as assumptions about atmospheric turbulence break down in this layer and it may dominate coupling of the surface to the UBL due to its considerable depth. The upper 90% of the UBL (mixed and residual layers) remains under-researched but new remote sensing methods and high resolution modelling tools now permit rapid progress. Surface heterogeneity dominates from neighbourhood to regional scales and should be more strongly considered in future studies. Specific research priorities include humidity within the UBL, high-rise urban canopies and the development of long-term, spatially extensive measurement networks coupled strongly to model development. (C) 2014 The Author. Published by Elsevier B.V.