U.S. Surface Data Keyed from the Climate Database Modernization Program (CDMP)

This data set contains U.S. station surface observations that were digitized from the original forms by the Climate Database Modernization Program (CDMP).

Data are available for more than 200 stations (mainly at airports, but also some city weather bureau offices) that made observations at hourly intervals at least during the daytime hours and often over the full 24-hour day. The general period of record for these stations is 1928-1948, though this varies by individual station. To find out what is available, see this inventory [https://rda.ucar.edu/datasets/ds506.0/inventories/sao_inventory.txt]. A significant effort was made by DSS to correct errors in the digitized data, especially dates, times, and pressures. For more information about this work, see this document [https://rda.ucar.edu/datasets/ds506.0/docs/qc-20040110.txt].

We have also received data for more than 130 U.S. stations that were digitized from Form 1001. These stations, which were usually city weather bureau offices, generally took observations once, twice, or four times daily. Some stations have data back as far as late 1892. An inventory [https://rda.ucar.edu/datasets/ds506.0/inventories/form1001_inventory.txt] can be viewed which shows stations and their date range coverage. These data will be made available to the community when errors in the digitized data have been corrected.

本数据集收录了由气候数据库现代化计划（CDMP）从原始形态数字化而来的美国气象站地表观测数据。数据涵盖了超过200个站点（主要位于机场，亦包括部分城市气象局办公室），这些站点在日间时段至少每小时进行一次观测，并在许多情况下全天24小时均有观测记录。这些站点的观测记录一般始于1928年，止于1948年，但具体时间跨度因站点而异。欲了解可用的数据详情，请参阅此清单[https://rda.ucar.edu/datasets/ds506.0/inventories/sao_inventory.txt]。数据数字化过程中，数据服务系统（DSS）投入了大量努力以纠正数据中的错误，尤其是日期、时间和气压方面的错误。有关此项工作的更多信息，请参阅此文件[https://rda.ucar.edu/datasets/ds506.0/docs/qc-20040110.txt]。

此外，我们还获得了超过130个美国站点的数据，这些数据来源于表1001的数字化。这些站点通常为城市气象局办公室，一般每日观测一次、两次或四次。部分站点的数据可以追溯到1892年末。可通过此清单[https://rda.ucar.edu/datasets/ds506.0/inventories/form1001_inventory.txt]查看站点及其日期范围覆盖情况。一旦数字化数据中的错误得到修正，这些数据将向公众开放。