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- W3179113158 abstract "Abstract The study of ocean bottom pressure (OBP) is useful for understanding the barotropic processes variability that contribute to sea level rise. Previous studies have reported the strong OBP anomalies in the Southern Ocean on different time scales. In this study, the characteristic and mechanisms of the energetic interannual OBP variability in the southeastern Pacific are examined using 14 years of GRACE data. It is found that the OBP anomalies are positive (negative) related to the convergence (divergence) of Ekman transport forced by local winds variability. The sea level pressure (SLP) anomalies shows a wavenumber-3 structure in the high latitude of the South Pacific, which benefits a strong and persistent anticyclone over the southeastern Pacific, leading to the positive OBP anomalies there. Such SLP anomalies are similar to the second Pacific-South American (PSA2). Moreover, El Niño–Southern Oscillation (ENSO) plays an important role in the austral spring (August-November) OBP variability and leads the austral autumn (March-June) OBP variability by 1 season. These results highlight the influence of atmospheric variability on OBP anomalies and are validated by a mass conservation (non-Boussinesq) ocean model, which is expected to not only better understanding of OBP mechanisms in a longer time, but also predict OBP variation in the global scale." @default.
- W3179113158 created "2021-07-19" @default.
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- W3179113158 date "2021-07-06" @default.
- W3179113158 modified "2023-10-16" @default.
- W3179113158 title "Mechanism of Interannual Variability of Ocean Bottom Pressure in the South Pacific" @default.
- W3179113158 doi "https://doi.org/10.21203/rs.3.rs-559761/v1" @default.
- W3179113158 hasPublicationYear "2021" @default.
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