Sea level measured by tide gauges from global oceans as part of the Joint Archive for Sea Level (JASL) from 21 June 1877 to 31 December 2003 (NODC Accession 0001235)

The Joint Archive for Sea Level (JASL), a collaboration between the University of Hawaii Sea Level Center (UHSLC) and the World Data Center-A for Oceanography, the National Oceanographic Data Center (NODC), and the National Coastal Data Development Center (NCDDC), continues to acquire, quality control, manage, and distribute sea level data as initiated by the Tropical Ocean Global Atmosphere (TOGA) Program, which ended in 1994. The TOGA ocean monitoring networks were primarily in the tropics. Since the end of TOGA, the JASL has slowly begun to absorb sea level sites in oceanographically strategic locations beyond the tropics. The JASL is now an official Global Sea Level Observing System (GLOSS) data center. The JASL Research Quality Data Set (RQDS) is the largest global collection of quality-controlled hourly sea level. Efforts are underway to acquire new sites and uncover historic records as available. 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, daily, and monthly sea level values in standardized formats. These data are annually submitted to the World Data Center-A for Oceanography (WDCA) and the monthly values are provided to the Permanent Service for Mean Sea Level. This set contains the complete holdings of the JASL for series that have been quality controlled, assessed, and documented.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（University of Hawaii Sea Level Center, UHSLC）、世界海洋学数据中心-A（World Data Center-A for Oceanography）、国家海洋学数据中心（National Oceanographic Data Center, NODC）以及国家海岸数据开发中心（National Coastal Data Development Center, NCDDC）联合共建。该档案馆持续开展海平面数据的获取、质量控制、管理与分发工作，其业务起源于1994年终止的热带海洋全球大气（Tropical Ocean Global Atmosphere, TOGA）计划。TOGA海洋监测网络主要覆盖热带海域。自TOGA计划结束以来，JASL已逐步拓展收录范围，纳入超出热带区域、具备海洋学战略意义位置的海平面监测站点。目前，JASL已成为官方认证的全球海平面观测系统（Global Sea Level Observing System, GLOSS）数据中心。 JASL研究级质量数据集（Research Quality Data Set, RQDS）是全球规模最大的经过严格质量控制的逐时海平面数据集。当前团队正积极推进新监测站点的数据获取工作，并全力挖掘可获取的历史观测记录。JASL从区域及国家级海平面监测网络获取逐时原始数据，对数据开展全面检查，修正数据尖峰、时移等明显错误；对于时长小于25小时的数据间隙，采用插值法进行补全；基准面相关问题则回退至数据原始提供方处理。若原始提供方无法解决基准面偏移问题，可通过对比邻近站点数据或分析逐时残差进行针对性调整。此外，团队会编制监测站描述性信息与质量评估报告。本数据集的核心目标是构建一套科学严谨、文档规范的标准化格式逐时、日度及月度海平面数据档案库。 上述数据每年都会提交至世界海洋学数据中心-A（World Data Center-A for Oceanography, WDCA），而月度均值数据则会同步提供给平均海平面常设服务机构（Permanent Service for Mean Sea Level）。本数据集收录了JASL所有经过质量控制、评估与文档化的完整序列馆藏。