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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Comparison of the Madden-Julian oscillation (MJO) during the TOGA COARE IOP with a 15-year climatology
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Comparison of the Madden-Julian oscillation (MJO) during the TOGA COARE IOP with a 15-year climatology

机译：TOGA COARE IOP期间15年气候的Madden-Julian振荡（MJO）的比较

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摘要

During the Tropical Ocean-Global Atmosphere (TOGA) Coupled Ocean-Atmosphere Response Experiment (COARE) intensive observing period (IOP) (November 1992 to February 1993), two pronounced Madden-Julian oscillation (MJO) events were observed and have been intensively studied. To provide a necessary climatological basis for the case study as well as to evaluate how typical the COARE MJO cases are and to what degree conclusions made from these cases can be generalized, we compare the MJOs that occurred during the COARE IOP with a 15-year climatology. In this paper, along with a description of the characteristics of large-scale background including flow patterns, OLR and SST, the emphasis is placed on the intensity and propagation of the oscillations exhibited in organized convection and atmospheric circulation. Moreover, the maintenance of perturbation kinetic energy (PKE) associated with 30- to 60-day variability containing the MJOs is compared as well. The COARE IOP occurred in a lingering period between the persistence and the rejuvenation of the warm ENSO episode of 1992-1993. The intraseasonal oscillations in the convective activity and large-scale circulation are intensified during the IOP, and the maximum intensification is located in the region of central Pacific. Two MJO events in the COARE IOP are typical in terms of phase propagation. The major features of the energy transformation processes, such as the predominant role of the generation of the perturbation available potential energy (PAPE) by convective heating and its conversion into the PKE in the maintenance of the MJOs, found in the COARE IOP, are also displayed in the climatology indicating the generality of the results obtained from the COARE case study. [References: 27]
机译：在热带海洋-全球大气（TOGA）耦合海洋-大气响应实验（COARE）密集观测期（IOP）（1992年11月至1993年2月）中，观测到两个明显的Madden-Julian振荡（MJO）事件，并进行了深入研究。 。为了为案例研究提供必要的气候基础，并评估COARE MJO案例的典型程度以及可以概括这些案例得出的结论的程度，我们将COARE IOP期间发生的MJO与15年进行了比较气候学。在本文中，除了对包括流动模式，OLR和SST在内的大背景的特征进行描述之外，重点还放在有组织的对流和大气环流中所表现出的振荡的强度和传播上。此外，还比较了与包含MJO的30至60天变异性相关的摄动动能（PKE）的维持情况。 COARE IOP发生在1992-1993年ENSO暖期持续存在和恢复活力之间的一个持续时期。对流活动和大尺度环流的季节内振荡在IOP期间加剧，并且最大强度位于太平洋中部地区。就相位传播而言，COARE IOP中的两个MJO事件是典型的。能量转换过程的主要特征，例如对流加热产生微扰可用势能（PAPE）的主要作用，以及在COARE IOP中维护MJO时将其转化为PKE的主要作用。在气候学中显示的内容表明从COARE案例研究中获得的结果的一般性。 [参考：27]

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