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Characteristics of temperature evolution from 1960 to 2015 in the Three Rivers’ Headstream Region, Qinghai, China

机译：1960年至2015年在中国青海，中国青海三河上游区温度演变特征

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The cumulative anomaly analysis, the ensemble empirical mode decomposition (EEMD), the Bernaola Galvan heuristic segmentation algorithm (BGSA), the Le Page test, the moving t test at different sub-series scales, and the quasi-periodic oscillations (QPOs) were used to demonstrate the statistical characteristics of the temperature changes in the study area from 1960 to 2015. The results were as follows: the temperatures varied obviously among subregions and seasons and they generally increased; the climate tendency rates of autumn mean temperatures were higher than those of summer and spring; additionally, the temperatures in the three subregions of the Three Rivers’ Headstream Region (THRHR) were relatively low in the 1960s, especially in the early 1960s, followed by those in the 1970s, and the annual mean temperature has been increasing since the mid-late 1980s, especially in the middle 1990s. The results of EEMD showed that the QPOs of the annual mean temperature series in the study area were mainly quasi-3?years, quasi-5–8?years, quasi-12–15?years, and quasi-35–38?years. The results of the annual mean temperature series mutational sites showed that a significant warming mutation began in approximately 1997; and the mutational sites of seasonal mean temperature series in the three subregions of the THRHR all began in the middle and late 1990s. The prediction result of the temperature series trend based on multiple methods showed that the warming persistence of annual and seasonal mean temperature series would be stronger, and their seasonal and regional differences were obvious.
机译：累积异常分析，集合经验模式分解（EEMD），Bernaola Galvan启发式分割算法（BGSA），LE页测试，不同子系列尺度的移动T测试，以及准周期性振荡（QPOS）是用于展示1960年至2015年研究区域温度变化的统计特征。结果如下：次区域和季节中的温度明显多样化，它们通常增加;秋季平均温度的气候趋势率高于夏季和春季;另外，在20世纪60年代，三个河流地区区域（ThrHR）的三个次区域中的温度相对较低，特别是在20世纪60年代初，其次是20世纪70年代的那些，而年度平均温度自于中间20世纪80年代末，特别是在20世纪90年代中期。 EEMD的结果表明，研究区年度平均温度系列的QPO主要是Quasi-3？年，准5-8？年，准12-15岁？年和Quasi-35-38？年。年平均温度系列突变网站的结果表明，大约1997年开始了显着的变暖突变;和季节性平均温度系列的突变站点在第三个次区域中都始于20世纪90年代中期和后期。基于多种方法的温度系列趋势的预测结果表明，年龄和季节性温度系列的变暖持续性更强，其季节性和区域差异是显而易见的。

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