Summer high temperature extremes over Northeastern China predicted by spring soil moisture

Summer high temperature extremes over Northeastern China predicted by spring soil moisture
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春季土壤湿度预测中国东北地区夏季极端高温

DOI:
10.1038/s41598-019-49053-9
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发表时间:
2019-08
期刊:
影响因子:
4.6
通讯作者:
Kai Yang
Kai Yang
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Jingyong Zhang;Zhangmei Yang;Lingyun Wu;Kai Yang

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目前的季节性气候预测主要集中在海洋异常上。然而,在海洋影响相对较弱的许多热带外陆地地区,预测技能通常是有限的。在这项研究中,我们讨论了前年春季土壤水分状况对典型的北半球中纬度地区中国东北部夏季炎热日数的预测潜力。结果表明,1979年-2017年,中国中东部春季土壤水分状况与随后中国东北部夏季高温日数密切相关。根据前一年春季土壤水分状况建立的统计模型对中国东北部夏季炎热日数的时间交叉验证相关技巧为0.57。2009-2017年独立后播实验的空间模式关联技能也很高,在0.87到0.94之间。我们的结果可以很容易地应用于中国东北部夏季高温日数的实际预报,并有助于提供更好的气候服务,减少这个热带外地区极端高温的不利影响。
Current seasonal climate predictions mainly reside in the ocean anomalies. However, the prediction skills are generally limited over many extra-tropical land areas where the oceanic effects are relatively weak. In this study, we address the potential of preceding spring soil moisture condition to predict summer hot days over Northeastern China, a typical Northern Hemisphere mid-latitude region. The results show that spring soil moisture condition over Central-Eastern China is closely related with following summer hot days over Northeastern China for the period of 1979–2017. The statistical model based on the preceding spring soil moisture condition yields temporal cross-validated correlation skill of 0.57 for summer hot days over Northeastern China. The spatial pattern correlation skills of independent hindcast experiments for 2009–2017 are also high, ranging from 0.87 to 0.94. Our results can be easily applied to practical prediction of summer hot days over Northeastern China, and help to provide better climate services and reduce the detrimental effects of extreme heat over this extra-tropical region.
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发表时间: 2010
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