Supplementary data, code, and other information for ‘Discussion of: A Statistical Analysis of Multiple Temperature Proxies: Are Reconstructions of Surface Temperatures over the Last 1000 Years Reliable’

McShane and Wyner (2011) (henceforth MW) analyze a dataset of “proxy” climate records previously used by Mann et al. (2008) (henceforth M08) to attempt to assess their utility in reconstructing past temperatures. MW introduce new methods in their analysis, which is welcome. However, the absence of both proper data quality control and appropriate “pseudoproxy” tests to assess the performance of their methods invalidate their main conclusions.

McShane与Wyner（2011，下称MW）分析了一组此前由曼恩等人（Mann et al.，2008，下称M08）所使用的“代用气候记录（proxy climate records）”数据集，旨在评估该类记录在古温度重建中的应用价值。MW在其分析中引入了全新的研究方法，这一点值得肯定。然而，该研究既未实施规范的数据质量控制，也未采用恰当的“伪代用指标（pseudoproxy）”检验来评估自身方法的性能，因此其核心结论的有效性无法成立。