首页> 外文期刊>Journal of Geophysical Research, D. Atmospheres: JGR >Predictability of the Western North Pacific Subtropical High and Associated East Asian Monsoon Rainfall in APCC Multi‐Models
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Predictability of the Western North Pacific Subtropical High and Associated East Asian Monsoon Rainfall in APCC Multi‐Models

机译:APCC多模式中西北太平洋副热带高压及东亚季风降水的可预测性

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Abstract Using selected models with better performance in simulating the Western North Pacific Subtropical High (WNPSH) variability can improve predictions for the East Asia Monsoon (EAM) precipitation. The selected model is clearly superior to the EAM rainfall prediction with the responses to sea surface temperature anomalies (SSTA) forcing and coupling in the atmospheric circulation between the East Asian subtropical Jet and WNPSH, which are similar to those in the observations. The findings of this study reveal that the “poor” model for EAM rainfall prediction is highly correlated with SSTA regardless of El Niño‐Southern Oscillation phases. The “poor” model shows the responding circulation pattern to the El Niño persistent SSTA in the central‐eastern Pacific until JJA, which induces more bias in the prediction of WNPSH variability and EAM rainfall. It is also noticeable that the “poor” model exhibits stronger barotropic response between the WNPSH and EASJ compared to observations, and therefore, it induces stronger relation between the EAJS and EAM rainfall. As a result, both atmospheric circulation itself over the EAM region and atmospheric‐ocean interactions are important to enhance the predictability of the WNPSH and EAM rainfall.
机译:摘要 利用具有较好性能的模式模拟西北太平洋副热带高压(WNPSH)变率,可以提高对东亚季风(EAM)降水的预测。所选择的模式明显优于EAM降雨预测,对东亚副热带急流和WNPSH之间大气环流海面温度异常(SSTA)强迫和耦合的响应与观测结果相似。本研究结果表明,无论厄尔尼诺-南方涛动阶段如何,EAM降雨预测的“差”模型与海温高度相关。“差”模型显示了对厄尔尼诺持续海温在中东部太平洋直到JJA的响应环流模式,这在WNPSH变率和EAM降雨的预测中引起了更多的偏差。同样值得注意的是,与观测值相比,“差”模式在WNPSH和EASJ之间表现出更强的气压响应,因此,它在EAJS和EAM降雨之间具有更强的关系。因此,EAM区域的大气环流本身和大气-海洋相互作用对于提高WNPSH和EAM降雨的可预测性都很重要。

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