The role of heating and cooling associated with ice processes on tropical cyclogenesis and intensification
The role of heating and cooling associated with ice processes on tropical cyclogenesis and intensification
复制标题
与冰过程相关的加热和冷却对热带气旋发生和强化的作用
DOI：
10.1002/qj.3187
复制
发表时间：
2018
影响因子：
8.9
通讯作者：
M. T. Montgomery
中科院分区：
文献类型：
--
作者：
G. Kilroy;R. K. Smith;M. T. Montgomery
最近利用仅暖雨微物理对热带气旋发生和随后的强化进行的理想化数值研究扩展到了检查冰过程表示所带来的变化。研究发现，达到气旋生成所需的时间是等效的仅暖雨模拟中的两倍多。讨论了妊娠期长度差异的微妙原因。中层涡旋在孕育早期形成，此时存在冰过程，但仅存在暖雨过程时则不会形成。轴对称平衡计算表明，该中层涡旋的自转与冰存在下非绝热加热速率的不同空间分布有关，从而导致对流层中层绝对涡度的系统尺度径向流入。冰模拟中形成的热带气旋涡旋与纯暖雨模拟中形成的热带气旋涡旋相似，摩擦边界层的增强在聚焦内核深对流方面发挥着越来越重要的作用。该漩涡原位发展的规模比中层漩涡小得多，并且没有证据表明它是中层漩涡以某种方式向下携带的结果，正如一些研究人员之前所暗示的那样。讨论了该结果与先前热带气旋发生理论相关的一些含义。
A recent idealized numerical study of tropical cyclogenesis and subsequent intensification using warm‐rain‐only microphysics is extended to examine the modifications brought about by a representation of ice processes. It is found that the time taken to reach cyclogenesis is more than twice that in the equivalent warm‐rain‐only simulation. The subtle reasons for the difference in the length of the gestation period are discussed. A mid‐level vortex forms during the early gestation period when ice processes are present, but not when warm‐rain‐only processes are present. Axisymmetric balance calculations show that the spin‐up of this mid‐level vortex is related to the different spatial distribution of diabatic heating rate in the presence of ice, which leads to asystem‐scaleradial influx of absolute vorticity in the middle troposphere. The tropical‐cyclone vortex that forms in the simulation with ice is similar to that in the warm‐rain‐only simulation, with the strengthening frictional boundary layer exerting a progressively important role in focusing inner‐core deep convection. This vortex developsin situon a much smaller scale than the mid‐level vortex and there is no evidence that it is a result of the mid‐level vortex being somehow carried downwards, as has been suggested previously by some researchers. Some implications of the results in relation to previous theories of tropical cyclogenesis are discussed.
登录
查看更多内容
影响因子：
8.9
作者：
Shengming Tang;Roger K. Smith;M. Montgomery;M. Gu
通讯作者：
Shengming Tang;Roger K. Smith;M. Montgomery;M. Gu
影响因子：
8.9
作者：
G. Kilroy;Roger K. Smith
通讯作者：
G. Kilroy;Roger K. Smith
线性轴对称动力学在加强和成熟热带气旋中的适用性
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
M. Montgomery;Roger K. Smith
通讯作者：
Roger K. Smith
影响因子：
8.9
作者：
S. Vogl;Roger K. Smith
通讯作者：
S. Vogl;Roger K. Smith
影响因子：
8.9
作者：
Roger K. Smith;M. Montgomery
通讯作者：
Roger K. Smith;M. Montgomery