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Imaging · collection · 2013

Reconstructed Sea Level Version 1

Listed in NASA Earthdata CMR and NASA Data Portal — shown once because both records carry DOI 10.5067/recsl-000v1

The Reconstructed Sea Level dataset contains sea level anomalies derived from satellite altimetry and tide gauges.

Description

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.

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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.

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Where it is published

Catalogue records · 3

Topics

Stated by source
AMR · JASON-1 · JASON-1 MICROWAVE RADIOMETER · JASON-1 RADAR ALTIMETER · JASON-2 RADAR ALTIMETER · Ocean Topography Experiment · OSTM/JASON-2 · POSEIDON Solid State Radar Altimeter · Sea Surface Height · TOPEX Microwave Radiometer
From keywords
Astronomy & Astrophysics · Earth & Environmental Science · Ocean & Atmospheric Science · Physics
Inferred from text
Geophysics 70%
Provenance · 2 source records, 25 field assertions
SourceKeyLast seenRaw
NASA Earthdata CMRC2491772104-POCLOUD8 d agoJSON v1
NASA Data Portal13356c8d-68d7-4dec-80eb-2828ade0e88a5 d agoJSON v1
FieldAssertionExtractorEvidence
access_levelsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[field].anzsrc:group:3706enrichment · NASA CMRtaxonomy-embedding@1.0.0title+keywords+description (70%)
concepts[field].local:field:astronomymapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:earth-environmentalmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:ocean-atmosphericmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[field].local:field:physicsmapping · data nasa govconnector:data_nasa_gov@1.0.0
concepts[instrument].gcmd_instrument:amrsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:jason-1-microwave-radiometersource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:poseidon-2source · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:poseidon-3source · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:ssaltsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[instrument].gcmd_instrument:tmrsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[measured_variable].gcmd:earth-science/oceans/sea-surface-topography/sea-surface-heightsource · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:jason-1source · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:ostm-jason-2source · NASA CMRconnector:nasa_cmr@1.0.0
concepts[platform].gcmd_platform:topex-poseidonsource · NASA CMRconnector:nasa_cmr@1.0.0
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temporalsource · NASA CMRconnector:nasa_cmr@1.0.0/umm/TemporalExtents
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updated_datesource · NASA CMRconnector:nasa_cmr@1.0.0
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