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Intraannual dissimilarities between monthly mean Northern Hemisphere temperature anomalies during the twentieth century

机译：二十世纪北半球月平均温度距平之间的年内差异

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摘要

Northern Hemisphere monthly mean temperature anomalies during the twentieth century exhibit seasonal differences. To expose the most significant intermonthly dissimilarities, here we investigate this issue in more details. We show that the trends significantly differ for the months close to the equinoxes. Using the technique of multidimensional scaling analysis we find that two underlying attributes are sufficient to acceptably describe the structure of the observed intermonthly dissimilarities. Namely, these are the monthly sample percentiles around the 30th and the 70th together with the linear trends. We find that intraannual temperature anomaly dissimilarities statistically depend on the seasonal cycles of the Northern Hemisphere oceanic heat content, sea ice and snow cover and the Arctic sea ice cover as well as on the seasonality of the chaoticity of the Northern Hemisphere atmospheric dynamics. We also speculate that the annual cycles of these ocean and cryosphere characteristics statistically set the pattern for the observed course of linear warming over the calendar months.
机译：在二十世纪，北半球的月平均气温异常表现出季节性差异。为了揭示最重要的月度差异，这里我们将更详细地调查此问题。我们显示，在接近春分的月份中，趋势显着不同。使用多维尺度分析技术，我们发现两个基本属性足以可接受地描述观察到的月度差异的结构。即，这些是30日和70日前后的每月样本百分位数以及线性趋势。我们发现，年内温度异常的差异在统计上取决于北半球海洋热含量，海冰和积雪和北极海冰盖的季节周期以及北半球大气动力学的混沌性季节。我们还推测，这些海洋和冰冻圈特征的年度周期从统计学上确定了历月内线性升温过程的模式。

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