A recent analytical model of the Madden‐Julian Oscillation (MJO), the WISHE‐moisture mode theory, successfully models all the main characteristics of the MJO, namely, that it is a planetary, unstable, and eastward propagating tropical mode. The main assumption of the WISHE‐moisture mode theory is that an interplay between the global mean easterly zonal winds and moisture leads to the propagation and destabilization of the MJO. We investigate this theory by building a climatological MJO using reanalysis, OAFlux surface latent heat fluxes, and outgoing longwave radiation data and compare it to the WISHE‐moisture mode. The necessary condition for the WISHE‐moisture mode theory—easterly global mean zonal winds—is always present in the tropics. Comparing the zonal wind, moisture, and moisture tendency anomalies to the WISHE‐moisture mode, we find that the WISHE‐moisture mode theory is in agreement with the reanalysis‐derived climatological MJO. Reanalysis and OAFlux surface latent heat fluxes are in agreement with the WISHE‐moisture mode theory. Although meridional surface winds seem to contribute negatively to the surface latent heat flux anomaly, we show that their effect is secondary in the region of enhanced surface latent heat fluxes which moisten the boundary layer and lead to the propagation of the MJO.

中文翻译：

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疯狂的朱利安涛动和中风

WISHE水分模式理论是Madden-Julian涛动（MJO）的最新分析模型，成功地模拟了MJO的所有主要特征，即它是行星，不稳定和向东传播的热带模式。WISHE水分模式理论的主要假设是，全球平均东风和纬向风之间的相互作用会导致MJO的传播和不稳定。我们通过使用重新分析，OAFlux表面潜热通量和外出长波辐射数据建立气候MJO来研究该理论，并将其与WISHE水分模式进行比较。WISHE水分模式理论的必要条件-复活节全球平均纬向风-始终存在于热带地区。将纬向风，湿度和湿度趋势异常与WISHE湿度模式进行比较，我们发现WISHE水分模式理论与重新分析得出的气候MJO一致。再分析和OAFlux表面潜热通量与WISHE水分模式理论一致。尽管子午面风似乎对表面潜热通量异常有负面影响，但我们表明，它们的作用在增强表面潜热通量的区域中是次要的，这些区域会润湿边界层并导致MJO的传播。