Seasonal frost depths, midwestern USA, Version 1

This dataset includes frost tube data from 37 stations in the Upper Midwest (Minnesota, North Dakota, Wisconsin), USA. The responsible agency was the St. Paul...本数据集收录了美国中西部北部（明尼苏达州、北达科他州、威斯康星州）境内37个观测站的冻管观测数据，负责该数据集的主管机构为圣保罗（St. Paul）……