The Effect of the Madden-Julian Oscillation on the Mesospheric Migrating Diurnal Tide: A Study Using SD-WACCM
The Effect of the Madden-Julian Oscillation on the Mesospheric Migrating Diurnal Tide: A Study Using SD-WACCM
复制标题
马登-朱利安振荡对中层迁移日潮的影响：利用 SD-WACCM 进行的研究
DOI：
10.1029/2018gl077956
复制
发表时间：
2018
影响因子：
5.2
通讯作者：
Xiankang Dou
中科院分区：
文献类型：
--
作者：
Chengyun Yang;Anne K. Smith;Tao Li;Xiankang Dou
首次使用由再分析数据驱动的指定动态全大气群落气候模式（SD-WACCM）的模拟研究了中层迁移日（DW 1）潮汐对Madden-Julian振荡（MJO）的响应。分析表明，MJO与中层DW 1潮振幅之间存在着显著的联系。在MJO第2和第3阶段，对流异常与赤道对流层太阳辐射吸收和潜热释放的增强有关;这些反过来又导致更强的DW 1强迫。相反，强迫DW 1太阳和对流层潜热加热是较弱的MJO阶段8。MJO相对阶段的潮汐振幅与北半球冬季平均状态的差异约为15- 20%。参数化重力波的变化被发现有显着的影响DW 1潮汐响应在某些阶段的MJO。
The response of the mesospheric migrating diurnal (DW1) tide to the Madden‐Julian oscillation (MJO) is investigated for the first time using a simulation from the Specified‐Dynamic Whole Atmosphere Community Climate Model (SD‐WACCM), which is driven by reanalysis data. Analysis shows that a significant connection exists between the MJO and the mesospheric DW1 tidal amplitude. During MJO phases 2 and 3, the convection anomalies are associated with enhancement in both the solar insolation absorption and latent heat release in the equatorial troposphere; these in turn lead to stronger DW1 forcing. Conversely, the forcing of DW1 by solar and latent heating in the troposphere is weaker during MJO phase 8. The difference of the tidal amplitude during the opposite MJO phases from the boreal winter mean state is ~15–20%. The parameterized gravity wave variations are found to have a significant impact on the DW1 tidal response in some phases of the MJO.