Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China.
PLoS One. 2013;8(2):e56909. doi: 10.1371/journal.pone.0056909. Epub 2013 Feb 25.
In this study the depth of the atmospheric boundary layer (ABL) over the Tibetan Plateau was measured during a regional radiosonde observation campaign in 2008 and found to be deeper than indicated by previously measurements. Results indicate that during fair weather conditions on winter days, the top of the mixed layers can be up to 5 km above the ground (9.4 km above sea level). Measurements also show that the depth of the ABL is quite distinct for three different periods (winter, monsoon-onset, and monsoon seasons). Turbulence at the top of a deep mixing layer can rise up to the upper troposphere. As a consequence, as confirmed by trajectory analysis, interaction occurs between deep ABLs and the low tropopause during winter over the Tibetan Plateau.
在这项研究中，对 2008 年的一次区域探空观测期间青藏高原上空的大气边界层（ABL）深度进行了测量，发现其深度超过了之前的测量结果。结果表明，在冬季晴天的天气条件下，混合层的顶部可高达地面以上 5 公里（海拔 9.4 公里）。测量结果还表明，ABL 的深度在三个不同时期（冬季、季风开始和季风季节）之间存在明显差异。在深厚混合层的顶部，湍流可上升到对流层上层。因此，正如轨迹分析所证实的那样，冬季青藏高原上空的深 ABL 与低对流层顶之间存在相互作用。
