Nocturnal Tornado Climatology
Nocturnal Tornado Climatology
复制标题
DOI：
10.1175/2009waf2222294.1
复制
发表时间：
2010-04
影响因子：
2.9
通讯作者：
Amanda K. Kis;J. Straka
中科院分区：
文献类型：
--
作者：
Amanda K. Kis;J. Straka
夜间龙卷风的研究很少，夜间龙卷风的业务预报往往是由偏向于白天龙卷风的研究结果指导的。然而，龙卷风的环境很可能在昼夜循环中变化很大。例如，风暴流入的深度和性质可能会随着白天边界层过渡到稳定的夜间边界层而发生变化，并且低空急流（LLJ）可能会在残留层和自由大气中形成。本文进行的研究是用来调查夜间边界层和自由大气以上，可能会影响夜间龙卷风的独特功能。2004年至2006年期间，在美国本土发生的重大（F2-F5）夜间龙卷风的气候学表明，以前的气候学认为不利于下午晚些时候/傍晚龙卷风发生的环境实际上有利于重大的夜间龙卷风发生。这些夜间环境可能是一种...
Abstract Very few studies on nocturnal tornadoes have been performed, and operational forecasting of nocturnal tornadoes is often guided by the results of studies that are biased toward daytime tornadoes. However, it is likely that tornado environments vary significantly over the diurnal cycle. For example, the depth and nature of storm inflow may change as the daytime boundary layer transitions into a stable nighttime boundary layer, and a low-level jet (LLJ) may form above in the residual layer and free atmosphere. The study performed herein is used to investigate features unique to nocturnal boundary layers and the free atmosphere above that may affect nocturnal tornadoes. A climatology of significant (F2–F5) nocturnal tornadoes in the contiguous United States between 2004 and 2006 shows that environments deemed by previous climatologies as unfavorable for late afternoon/early evening tornadogenesis are in fact conducive to significant nocturnal tornadogenesis. These nocturnal environments may be chara...