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Sea level in ocean reanalyses and tide gauges

 

作者: Gennady A. Chepurin,   James A. Carton,   Eric Leuliette,  

 

期刊: Journal of Geophysical Research: Oceans  (WILEY Available online 2014)
卷期: Volume 119, issue 1  

页码: 147-155

 

ISSN:0148-0227

 

年代: 2014

 

DOI:10.1002/2013JC009365

 

关键词: sea level;reanalysis;tide gauge;synthesis

 

数据来源: WILEY

 

摘要:

Previous studies have noted the presence of interannual to multidecadal variability in tide gauge sea level records which is correlated with meteorological variability and which can overwhelm the signal associated with global sea level rise. This study examines the usefulness of using a set of seven ocean reanalysis and synthesis products in studies of sea level variability by comparing the tide gauges and reanalysis products at a representative set of 87 tide gauge station locations. The comparison is carried out for both a half‐century base period and a century long‐extended period. Treating the set of products as an ensemble of realizations obtained using different techniques, the results show generally good agreement for the half‐century period with ensemble average correlations of 0.57 and RMS differences of 2.2 cm, reducing to a correlation of 0.5 for the extended period. A significant fraction of the difference between tide gauge sea level and product sea level is associated with meteorological forcing. These results support the conclusion that much of the interannual to multidecadal variability that appears in the tide gauge records is meteorologically driven. This suggests that ocean products have potential to be used to isolate this variability from the signal associated with the underlying global sea level

 

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