Direct and Indirect Effects of Surface Fluxes on Moist Baroclinic Development in an Idealized Framework
Direct and Indirect Effects of Surface Fluxes on Moist Baroclinic Development in an Idealized Framework
复制标题
理想化框架中地表通量对湿斜压发展的直接和间接影响
DOI：
10.1175/jas-d-19-0328.1
复制
发表时间：
2020
影响因子：
3.1
通讯作者：
T. Spengler
中科院分区：
文献类型：
--
作者：
K. F. Haualand;T. Spengler
地面感热通量和潜热通量在湿斜压发展中的复杂作用需要更好地了解它们的局部和远程影响。在Eady模式中引入非绝热效应，研究了地面通量对涡旋有效势能非绝热产生的直接影响，以及它们通过环流和潜热的修正所产生的间接影响。结果表明，地面感热通量的影响很小，与其位置和参数无关，而相当于暖输送带的潜热是发展的主要非绝热来源。暖传送带附近向下的地表感热通量导致结构改变，增加了从基本态有效势能到涡旋有效势能的转换，同时伴随着减弱了上升，从而减弱了潜热。通过向温暖的传送带中提供额外的湿气，可以很容易地补偿有害影响。另一方面，冷区向上的地表热通量不利于生长。当向下(向上)地面感热通量位于相当于暖输送带的下方时，潜热加热层底部的非绝热感热异常占主导地位(不占主导地位)。向下移动地面感热通量远离温暖的传送带将导致增长率、潜热释放、低层结构和能量学的实质性变化，其中地面感热通量的影响甚至可能是有利的。
The convoluted role of surface sensible and latent heat fluxes on moist baroclinic development demands a better understanding to disentangle their local and remote effects. Including diabatic effects in the Eady model, the direct effects of surface fluxes on the diabatic generation of eddy available potential energy as well as their indirect effects through modifications of the circulation and latent heating are investigated. It is shown that surface sensible heat fluxes have a minor impact, irrespective of their position and parameterization, while latent heating in the region equivalent to the warm conveyor belt is the dominant diabatic source for development. Downward surface sensible heat fluxes in proximity of the warm conveyor belt results in structural modifications that increase the conversion from basic-state available potential energy to eddy available potential energy, while concomitantly weakening the ascent and hence latent heating. The detrimental effects are easily compensated through provision of additional moisture into the warm conveyor belt. Upward surface heat fluxes in the cold sector, on the other hand, are detrimental to growth. When downward (upward) surface sensible heat fluxes are located below the equivalent of the warm conveyor belt, the diabatically induced PV anomaly at the bottom of the latent heating layer becomes dominant (less dominant). Shifting the downward surface sensible heat fluxes away from the warm conveyor belt results in substantial changes in the growth rate, latent heat release, low-level structure, and energetics, where the effect of surface sensible heat fluxes might even be beneficial.
影响因子：
4.6
作者：
Lee, Robert W.;Woollings, Tim J.;Masato, Giacomo
通讯作者：
Masato, Giacomo
北大西洋海面温度误差对北大西洋欧洲地区气候模拟的影响
影响因子：
8.9
作者：
Keeley S
通讯作者：
Keeley S