Sea level measured by tide gauges from global oceans -- the Joint Archive for Sea Level holdings as of October 2015 (NODC Accession 0019568)

The Joint Archive for Sea Level (JASL), a collaboration between the University of Hawaii Sea Level Center and the National Centers for Environmental Information (NOAA/NESDIS/NCEI) continues to acquire, quality control, manage, and distribute sea level data as initiated by the Tropical Ocean Global Atmosphere Program, which ended in 1994. The JASL is a Global Sea Level Observing System archive center and is the largest global collection of quality-controlled hourly sea level. The JASL receives hourly data from regional and national sea level networks. The data are inspected and obvious errors such as data spikes and time shifts are corrected. Gaps less than 25 hours are interpolated. Reference level problems are referred back to the originator. If the originators can not resolve the reference level shift,comparisons with neighboring sites or examination of the hourly residuals may warrant an adjustment. Descriptive station information and quality assessments are prepared. The objective is to assemble a scientifically valid, well-documented archive of hourly and daily sea level values in standardized formats. These data are bi-annually submitted to the World Data Center-SS for Oceanography via NCEI, the Permanent Service for Mean Sea Level, and the British Oceanographic Data Centre. This set contains the complete holdings of the JASL for series that have been quality controlled, assessed, and documented. As of October 2015, the holdings consisted of 689 series with 17,369 station-years of quality-assured data. The series are of variable lengths with the greatest concentration between 5 and 30 years, although a few sites have over 70 years.

海平面联合档案馆（Joint Archive for Sea Level, JASL）由夏威夷大学海平面中心与美国国家环境信息中心（NOAA/NESDIS/NCEI）联合共建，承接了1994年终止的热带海洋全球大气计划发起的海平面数据采集、质量控制、管理与分发工作。JASL隶属于全球海平面观测系统档案馆，是目前全球规模最大的经过质量控制的逐时海平面数据集馆藏机构。该档案馆从区域及国家级海平面观测网络获取逐时观测数据，所有数据均经过核查，针对数据尖峰、时移等明显错误进行修正，并对时长小于25小时的数据空缺通过插值法予以补全。涉及基准面异常的问题将反馈至数据原始提供方，若原始提供方无法解决基准面偏移问题，可通过与邻近站点比对或分析逐时残差的方式进行校正。同时会整理测站描述性信息与质量评估报告，该档案馆的建设目标是构建一套格式规范、记录完整且具备科学可信度的逐时与逐日海平面数据档案库。上述数据每两年会通过NCEI分别提交至世界海洋学数据中心-SS、平均海平面常设服务机构以及英国海洋学数据中心。本数据集包含JASL所有经过质量控制、评估与备案的海平面数据序列完整馆藏。截至2015年10月，该馆藏共包含689条数据序列，累计17369个测站年的经质量认证的观测数据。各数据序列的时长不一，绝大多数集中在5至30年区间，仅有少量测站的观测序列时长超过70年。