Impact of terrestrial weather on the upper atmosphere
Impact of terrestrial weather on the upper atmosphere
复制标题
陆地天气对高层大气的影响
DOI：
10.1029/2007gl032911
复制
发表时间：
2008
影响因子：
5.2
通讯作者：
G. Millward
中科院分区：
文献类型：
--
作者：
T. Fuller‐Rowell;R. Akmaev;F. Wu;A. Anghel;N. Maruyama;D. Anderson;M. Codrescu;M. Iredell;S. Moorthi;H.‐M. Juang;Yu;G. Millward
为了说明陆地天气对高层大气的影响，建立了一个全大气模式。动力学核心以国家气象局全球预报系统模型为基础，该模型已扩大到覆盖从地面到600公里的高度。该模型包括造成低层大气随机性的物理过程，这是高层大气变化的一个来源。上层包括扩散分离，风引起的主要物种的运输，并使用特定的焓作为因变量，以适应成分依赖的气体常数和比热。一个为期一年的模型模拟揭示了高达100公里高度的行星波。在更高的高度，动力学中的多日周期性表现为潮汐振幅的调制，特别是在低热层发电机区域的迁移半日潮。对流层天气中的行星波周期性穿透高层大气，可以解释热层和电离层变化的陆地天气来源。
A whole atmosphere model has been developed to demonstrate the impact of terrestrial weather on the upper atmosphere. The dynamical core is based on the NWS Global Forecast System model, which has been extended to cover altitudes from the ground to 600 km. The model includes the physical processes responsible for the stochastic nature of the lower atmosphere, which is a source of variability for the upper atmosphere. The upper levels include diffusive separation, wind induced transport of major species, and uses specific enthalpy as the dependent variable, to accommodate composition dependent gas constants and specific heats. A one‐year model simulation reveals planetary waves explicitly up to 100 km altitude. At higher altitude, multi‐day periodicities in the dynamics appear as a modulation of tidal amplitudes, particularly the migrating semi‐diurnal tide in the lower thermosphere dynamo region. The penetration of planetary wave periodicities from tropospheric weather into the upper atmosphere can explain terrestrial weather sources of variability in the thermospheric and ionospheric.