NOAA/WDS Paleoclimatology - Northern Hemisphere Extratropics 1400 Year MXD Summer Temperature Reconstruction

Annually resolved and millennium-long reconstructions of large-scale temperature variability are primarily composed of tree ring width (TRW) chronologies. Changes in ring width, however, have recently been shown to bias the ratio between low- and high-frequency signals. To overcome limitations in capturing the full spectrum of past temperature variability, we present a network of 15 maximum latewood density (MXD) chronologies distributed across the Northern Hemisphere extratropics. Independent subsets of continental-scale records consistently reveal high MXD before 1580 and after 1910, with below average values between these periods. Reconstructed extratropical summer temperatures reflect not only these long-term trends but also distinct cooling pulses after large volcanic eruptions. In contrast to TRW-dominated reconstructions, this MXD-based record indicates a delayed onset of the Little Ice Age by almost two centuries. The reduced memory inherent in MXD is likely responsible for the rapid recovery from volcanic-induced cooling in the fourteenth century and the continuation of warmer temperatures until ~1600.

本存档古气候学（Paleoclimatology）研究数据可从美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）下属的国家环境信息中心（National Centers for Environmental Information, NCEI）获取，该数据纳入古气候学世界数据服务（World Data Service for Paleoclimatology, WDS）管理体系。该研究对应的NCEI研究类型为气候重建（Climate Reconstruction）。数据集涵盖气候重建与树轮（tree ring）相关参数，地理覆盖范围为北半球（Northern Hemisphere）。时间跨度为距今（Before Present, BP）公历纪年的1350年至-52年。如需获取参数与研究地点的详细信息，请查阅元数据（metadata）说明。使用该数据集时，请务必引用本研究。