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The global patterns of interannual and intraseasonal mass variations in the oceans from GRACE and GRACE follow-on records
Delforge, D.; de Viron, O.; Durand, F.; Dehant, V. (2022). The global patterns of interannual and intraseasonal mass variations in the oceans from GRACE and GRACE follow-on records. Remote Sens. 14(8): 1861. https://dx.doi.org/10.3390/rs14081861
In: Remote Sensing. MDPI: Basel. ISSN 2072-4292; e-ISSN 2072-4292, more
Peer reviewed article  

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Keyword
    Marine/Coastal
Author keywords
    GRACE; ocean; principal component analysis; correlation analysis; sea level anomaly; wind stress curl

Authors  Top 
  • Delforge, D., more
  • de Viron, O.
  • Durand, F.
  • Dehant, V., more

Abstract
    We decompose the monthly global ocean bottom pressure (OBP) from GRACE(-FO) mass concentration solutions, with trends and seasonal harmonics removed from the signal, to extract 23 significant regional modes of variability. The 23 modes are analyzed and discussed considering sea-level anomalies (SLA), wind stress curl (WSC), and major climate indices. A total of two-thirds of the patterns correspond to extratropical regions and are substantially documented in other global or regional studies. Over the equatorial band, the identified modes are unprecedented, with an amplitude ranging between 0.5 and 1 cm. With smaller amplitude than extratropical patterns, they appear to be less correlated with the local SLA or WSC; yet they present significantly coherent dynamics. The Pacific Ocean modes show significant correlations with the Pacific decadal oscillation (PDO) and El Niño southern oscillation (ENSO).

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