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Impact of ENSO regimes on developing- and decaying-phase precipitation during rainy season in China

机译:ENSO体制对中国雨季发育期和衰落期降水的影响

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pstrongAbstract./strong This study investigated the influence of five El Ni?±oa??Southern Oscillation (ENSO) types on rainy-season precipitation in China central Pacific warming (CPW), eastern Pacific cooling (EPC), eastern Pacific warming (EPW), conventional ENSO and ENSO Modoki. The multi-scale moving it/i??test was applied to determine the onset and withdrawal of rainy season. Results showed that the precipitation anomaly can reach up to 30span class="thinspace"/span% above average precipitation during decaying CPW and EPW phases. Developing EPW could cause decreasing precipitation over large areas in China with 10a??30span class="thinspace"/span% lower than average precipitation in most areas. Conventional El Ni?±o in the developing phase had the largest influence on ENSO-related precipitation among developing ENSO and ENSO Modoki regimes. Decaying ENSO also showed a larger effect on precipitation anomalies, compared to decaying ENSO Modoki. The difference between rainy-season precipitation under various ENSO regimes may be attributed to the combined influence of anti-cyclone in the western North Pacific and the Indian monsoon. Stronger monsoon and anti-cyclone are associated with enhanced rainy-season precipitation. The results suggest a certain predictability of rainy-season precipitation related to ENSO regimes./p.
机译:> >摘要。该研究调查了五种El Ni?±oa ??南方涛动(ENSO)类型对中国中部太平洋暖化(CPW),东太平洋冷却( EPC),东太平洋变暖(EPW),常规ENSO和ENSO Modoki。应用多尺度移动检验确定雨季的开始和结束。结果表明,在CPW和EPW衰减阶段,降水异常可比平均降水高出30%。发展中的EPW可能导致中国大面积地区降水减少,多数地区的平均降水量比平均降水量低10a ?? 30 class =“ thinspace”> %。在发展中的ENSO和ENSO Modoki体制中,处于发展阶段的常规El Ni?±o对ENSO相关的降水影响最大。与衰落的ENSO Modoki相比,衰落的ENSO对降水异常也显示出更大的影响。在各种ENSO体制下,雨季降水之间的差异可能归因于北太平洋西部和印度季风的反气旋的综合影响。较强的季风和反旋风与雨季降水增加有关。研究结果表明,与ENSO模式有关的雨季降水具有一定的可预测性。

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