NOAA/WDS Paleoclimatology - Arolik and Ongoke Lake, Alaska 16-10KYrBP Biogenic Silica Data

Evidence is mounting that abrupt climatic shifts occurred during the last glacial-interglacial transition (LGIT) in the North Atlantic and other regions. However, few high-resolution climatic records of the LGIT exist from the high latitudes of the North Pacific rim. We analyzed lake sediments from southwestern Alaska for biogenic silica, organic carbon, organic nitrogen, diatom assemblages, and compound-specific hydrogen isotopes. Results reveal climatic changes coincident with the Younger Dryas, Intra-Allerød Cold Period, and Pre-Boreal Oscillation. However, major discrepancies exist in the paleoclimate patterns of the Bølling-Allerød interstadial between our data and the GISP2 d18O record from Greenland, and causes are uncertain. These data suggest that the North Pacific and North Atlantic experienced similar reversals during climatic warming of the LGIT but that the Bølling-Allerød cooling trend in the GISP2d18O record is probably not a hemispheric or global pattern.

本存档古气候学研究数据集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，该机构隶属于古气候学世界数据服务（World Data Service for Paleoclimatology, WDS）。该数据集对应的NCEI研究类型为湖泊（Lake）。数据集包含古湖沼学（paleolimnology）相关参数，研究地理位置为美国阿拉斯加州。时间覆盖范围为距今16045至10425个日历年（calendar years before present, BP）。如需了解参数与研究地点的详细信息，请查阅元数据（metadata）。使用本数据集时，请引用该研究。