论文标题
超临界的溶解性哈德利细胞上升的边缘理论
Solsticial Hadley Cell ascending edge theory from supercriticality
论文作者
论文摘要
哈德利循环的上升分支延伸到夏季半球是地球气候的一个基本但不完全理解的特征。在这里，我们根据超临界强迫的程度提出了该上升边缘纬度的预测性分析理论。超临界性设定了基于假设状态的角动量和绝对涡度分布的大规模循环的最小程度是循环。我们明确模拟了这种逐纬度辐射辐射感染平衡（RCE）状态。它的深度平均温度曲线可通过简单的分析近似适当地捕获，该分析近似与$ \sinφ$线性增加，其中$φ$从冬季到夏季极是纬度。反过来，这将产生超临界强迫范围的三分之一的幂律缩放，并具有热rossby数。在潮湿而干燥的理想化GCM模拟中，在溶剂强迫下进行了多种行星旋转速率进行的，上升边缘纬度在很大程度上按照这种缩放的形式行为。
How far the Hadley circulation's ascending branch extends into the summer hemisphere is a fundamental but incompletely understood characteristic of Earth's climate. Here, we present a predictive, analytical theory for this ascending edge latitude based on the extent of supercritical forcing. Supercriticality sets the minimum extent of a large-scale circulation based on the angular momentum and absolute vorticity distributions of the hypothetical state were the circulation absent. We explicitly simulate this latitude-by-latitude radiative-convective equilibrium (RCE) state. Its depth-averaged temperature profile is suitably captured by a simple analytical approximation that increases linearly with $\sinφ$, where $φ$ is latitude, from the winter to the summer pole. This, in turn, yields a one-third power-law scaling of the supercritical forcing extent with the thermal Rossby number. In moist and dry idealized GCM simulations under solsticial forcing performed with a wide range of planetary rotation rates, the ascending edge latitudes largely behave according to this scaling.
