Using the Moist Static Energy Budget to Understand Storm-Track Shifts across a Range of Time Scales
Using the Moist Static Energy Budget to Understand Storm-Track Shifts across a Range of Time Scales
复制标题
使用潮湿静态能量预算来了解一系列时间尺度上的风暴轨迹变化
DOI：
10.1175/jas-d-17-0022.1
复制
发表时间：
2017
影响因子：
3.1
通讯作者：
T. Shaw
中科院分区：
文献类型：
--
作者：
P. Barpanda;T. Shaw
摘要风暴路径在一定时间尺度上随强迫的变化而发生纬向偏移。在这里，作者制定了一个潮湿的静态能量（MSE）框架风暴轨迹的位置，并使用它来了解风暴轨迹的变化，响应季节性日照，厄尔尼诺减去拉尼娜条件，以及直接（增加CO2在陆地上）和间接（增加海面温度）的影响增加CO2。两种方法（线性化泰勒级数和强加MSE通量散度）被开发来量化风暴路径的变化，并将其分解为净能量（MSE输入到大气减去大气储存）和MSE通量散度的平均纬向环流和静止涡旋的贡献。在所考虑的时间尺度上，净能量不是主要贡献。静止涡的贡献占主导地位的风暴路径转移响应季节性太阳辐射，厄尔尼诺减去拉尼娜条件下，和CO2的直接影响，在北方半球，而平均纬向环流...
AbstractStorm tracks shift meridionally in response to forcing across a range of time scales. Here the authors formulate a moist static energy (MSE) framework for storm-track position and use it to understand storm-track shifts in response to seasonal insolation, El Nino minus La Nina conditions, and direct (increased CO2 over land) and indirect (increased sea surface temperature) effects of increased CO2. Two methods (linearized Taylor series and imposed MSE flux divergence) are developed to quantify storm-track shifts and decompose them into contributions from net energy (MSE input to the atmosphere minus atmospheric storage) and MSE flux divergence by the mean meridional circulation and stationary eddies. Net energy is not a dominant contribution across the time scales considered. The stationary eddy contribution dominates the storm-track shift in response to seasonal insolation, El Nino minus La Nina conditions, and CO2 direct effect in the Northern Hemisphere, whereas the mean meridional circulation ...