Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Reconstructed Sea Level Version 1

Metadata Updated: December 6, 2023

The Reconstructed Sea Level dataset contains sea level anomalies derived from satellite altimetry and tide gauges. The satellite altimetric record provides accurate measurements of sea level with near-global coverage, but it has a relatively short time span, since 1993. Tide gauges have measured sea level over the last 200 years, with some records extending back to 1807, but they only provide regional coverage, not global. Combining satellite altimetry with tide gauges, using a technique known as sea level reconstruction, results in a dataset with the record length of the tide gauges and the near-global coverage of satellite altimetry. Cyclostationary empirical orthogonal functions (CSEOFs), derived from satellite altimetry, are combined with historical sea level measurements from tide gauges to create the Reconstructed Sea Level dataset spanning from 1950 through 2009. Combining the altimetric and tide gauge records alleviates the difficulties caused by the short record length and poor spatial distribution of the satellite altimetry and tide gauges, respectively. Previous sea level reconstructions have utilized empirical orthogonal functions (EOFs) as basis functions, but by using CSEOFs and by addressing other aspects of the reconstruction procedure, an alternative sea level reconstruction can be computed. The resulting reconstructed sea level dataset has weekly temporal resolution and half-degree spatial resolution. For specific information on the algorithm and how the CSEOFs are applied to the tide gauge data please see Hamlington et al. 2011.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date May 30, 2023
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

Graphic Preview


Additional Metadata

Resource Type Dataset
Metadata Created Date May 30, 2023
Metadata Updated Date December 6, 2023
Identifier C2491772104-POCLOUD
Data First Published 2012-08-09
Language en-US
Data Last Modified 2017-04-28
Category ROSES, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation CCAR, University of Colorado, Boulder. 2013-06-11. Smith and Reynolds NCDC Level 4 Historical Reconstructed Reconstructed Sea Level. Version 1. RECON_SEA_LEVEL_OST_L4_V1. NASA/JPL/PODAAC. Archived by National Aeronautics and Space Administration, U.S. Government, CCAR. CCAR, University of Colorado, Boulder, CCAR, 2013-06-11, Reconstructed Sea Level Version 1, .
Creator CCAR, University of Colorado, Boulder
Graphic Preview Description Thumbnail
Graphic Preview File
Harvest Object Id 6916a0fa-93a7-4865-aafc-43de300bfcaa
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL
Metadata Type geospatial
Old Spatial -180.0 -90.0 180.0 90.0
Program Code 026:001
Series Name Smith and Reynolds NCDC Level 4 Historical Reconstructed Reconstructed Sea Level
Source Datajson Identifier True
Source Hash b65c5dfbb289022bc22be85759f14602f5956860b3a799148775a63e85581d2c
Source Schema Version 1.1
Temporal 1950-01-03T00:00:00Z/2009-06-27T23:59:59Z

Didn't find what you're looking for? Suggest a dataset here.