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Optimal weighting scheme for averaging regional temperature (I) -Theoretical analysis

机译:平均区域温度的最优加权方案(I)-理论分析

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Inadequacy of a spatial data sampling scheme often causes confusion when considering global, hemispherical and regional temperature averages, Jones et al., Hansen et al., Vinnikov et al. used different methods in their researches for the long-term trend of global or hemispherical surface air temperatures. Optimal weighting scheme was used by Vinnikov et al. The weight for each station at different latitude was obtained in the sense of minimum mean square error of average temperature. The weights werethen used to compute the global or hemispherical average temperature. Recently, using empirical orthogonal functions, Shen et al. showed that the global average temperature can be computed with quite satisfactory accuracy by using only above 60 stations distributed properly over the globe.
机译:Jones等人,Hansen等人,Vinnikov等人在考虑全球,半球和区域平均温度时,空间数据采样方案的不足通常会造成混乱。在研究全球或半球形表面气温的长期趋势时使用了不同的方法。 Vinnikov等人使用了最佳加权方案。在平均温度的最小均方误差的意义上,获得了不同纬度下每个站点的权重。然后将权重用于计算全局或半球形平均温度。最近,Shen等人使用经验正交函数。结果表明,仅使用在全球范围内适当分布的60个以上的站点,就可以以相当令人满意的精度计算出全球平均温度。

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