这研究在 El Ni 期间在北方的夏天为降水异例模式的形成建议新解释 ? 发展中并且腐烂的 o 南部的摆动(ENSO ) 分阶段执行。在 El Ni 的北方的夏天 June-July-August ( JJA )( 0 )期间? o ( La Ni ?一)发展中的阶段,上面的水平( 300-100 hPa )积极潜在的温度异例类似于 Matsuno-Gill-type 回答到中央和平的加热(冷却),并且底层( 1000-850 hPa )潜在的温度异例与本地 SST 异例一致。在 El Ni 的北方的夏天 JJA ( 1 )期间? o ( La Ni ?一)腐烂的阶段,上面的水平潜力温度在全部热带地区上温暖并且类似于 Matsuno-Gill-type 回答到印度洋加热(冷却),并且低级潜在的温度异例跟随本地 SST 异例。潜在的温度异例的垂直异质影响大气的稳定性,它接着影响降水异例模式。数字实验的结果证实我们的观察。
This study proposes a new explanation for the formation of precipitation anomaly patterns in the boreal summer during the E1 Nifio-Southem Oscillation (ENSO) developing and decaying phases. During the boreal sum- mer June-July-August (JJA) (0) of the E1 Nino (La Nina) developing phase, the upper level (300-100 hPa) positive potential temperature anomalies resemble a Ma- tsuno-Gill-type response to central Pacific heating (cool- ing), and the lower level (1000-850 hPa) potential tem- perature anomalies are consistent with local SST anoma- lies. During the boreal summer JJA(1) of the E1 Nifio (La Nifia) decaying phase, the upper level potential tempera- ture warms over the entire tropical zone and resembles a Matsuno-Gill-type response to Indian Ocean heating (cooling), and the lower level potential temperature anomalies follow local SST anomalies. The vertical heterogeneity of potential temperature anomalies influences the atmospheric stability, which in turn influences the precipitation anomaly pattern. The results of numerical experiments confirm our observations.