NOAA/WDS Paleoclimatology - PAGES2k Global 2,000 Year Multiproxy Database

Reproducible climate reconstructions of the Common Era (1 CE to present) are key to placing industrial-era warming into the context of natural climatic variability. Here we present a community-sourced database of temperature-sensitive proxy records from the PAGES2k initiative. The database gathers 692 records from 648 locations, including all continental regions and major ocean basins. The records are from trees, ice, sediment, corals, speleothems, documentary evidence, and other archives. They range in length from 50 to 2000 years, with a median of 547 years, while temporal resolution ranges from biweekly to centennial. Nearly half of the proxy time series are significantly correlated with HadCRUT4.2 surface temperature over the period 1850-2014. Global temperature composites show a remarkable degree of coherence between high- and low-resolution archives, with broadly similar patterns across archive types, terrestrial versus marine locations, and screening criteria. The database is suited to investigations of global and regional temperature variability over the Common Era, and is shared in the Linked Paleo Data (LiPD) format, including serializations in Matlab, R and Python.

对公元纪年（公元1年至今）的可重现气候重建结果，是将工业时代变暖置于自然气候变率背景下开展分析的核心依据。本研究基于PAGES2k计划（PAGES2k）构建了一套社区共建的温度敏感代用记录数据库。该数据库共收录来自648个采样点位的692条记录，覆盖全球所有大陆区域与主要大洋盆地。这些记录来源于树木、冰芯、沉积物、珊瑚、洞穴沉积物（speleothems）、文献史料及其他古气候载体。其时间跨度介于50至2000年之间，中位时长为547年；时间分辨率覆盖两周至百年尺度。在1850-2014年时段内，近半数代用时间序列与HadCRUT4.2地表温度数据集（HadCRUT4.2）存在显著相关性。全球温度合成序列显示，高分辨率与低分辨率古气候载体间具备极高的一致性；不同载体类型、陆地与海洋点位以及筛选标准下的重建模式均大体相似。该数据库适用于公元纪年以来全球与区域温度变率的相关研究，以链接古数据（Linked Paleo Data, LiPD）格式进行共享，并提供Matlab、R及Python三种编程语言的序列化接口。