International Polar Year Historical Data and Literature, Version 1

The International Polar Year Historical Data and Literature collection (formerly known as the Discovery and Access of Historic Literature from the IPYs (DAHLI) project) is an online data collection consisting primarily of photographs, publications, and observational data records from, and relating to, the first two International Polar Years (IPY) 1882-83 and 1932-33 and the International Geophysical Year (IGY)1957-58. Examples of data contained in observational records include, but are not limited to: air magnetic vertical intensity, air conductivity, atmospheric-electric observations, auroral log data, potential-gradient electrographic data, dust counts, and meteorological observations.Photographs within the collection include those from the Wilkes Station in Antarctica, the USGS survey of Fletcher's Ice Island, and the DTM Geophysical Laboratory Library.Publications within this collection primarily consist of government (national and international) bulletins and reports on activities during the International Polar and International Geophysical years.Other data include audio files of interviews recorded during NCAR's Oral Histories Project, and a video on Drifting Station Alpha during the IGY, published by NSIDC.

国际极地年历史数据与文献馆藏（前身为“国际极地年历史文献发现与获取（DAHLI）项目”）是一款在线数据集，核心收录与前两届国际极地年（International Polar Year, IPY）1882-1883年、1932-1933年及国际地球物理年（International Geophysical Year, IGY）1957-1958年相关的照片、出版物与观测数据记录。
观测数据记录所涵盖的示例数据包括但不限于：大气垂直磁场强度、空气电导率、大气电学观测数据、极光观测日志数据、电位梯度电测数据、尘埃计数数据以及气象观测数据。
馆藏照片涵盖南极洲威尔克斯站（Wilkes Station）、美国地质调查局（United States Geological Survey, USGS）对弗莱彻冰岛的勘测影像，以及DTM地球物理实验室图书馆的相关馆藏影像。
本馆藏的出版物主要包含各国及国际政府发布的关于国际极地年与国际地球物理年活动的公报与研究报告。
其余数据包括美国国家大气研究中心（National Center for Atmospheric Research, NCAR）口述历史项目中录制的访谈音频文件，以及由美国国家冰雪数据中心（National Snow and Ice Data Center, NSIDC）发布的关于国际地球物理年期间阿尔法漂流站的视频资料。