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Open AccessArticle

Coupling Influences of ENSO and PDO on the Inter-Decadal SST Variability of the ACC around the Western South Atlantic

by You-Lin Wang 1,†, Yu-Chen Hsu 2,3,†, Chung-Pan Lee 2,* and Chau-Ron Wu 1,*
1
Department of Earth Sciences, National Taiwan Normal University, Taipei 11677, Taiwan
2
Department of Marine Environment and Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan
3
Taiwan Ocean Research Institute, National Applied Research Laboratories, Kaohsiung 80143, Taiwan
*
Authors to whom correspondence should be addressed.
These authors equally important as the first author.
Sustainability 2019, 11(18), 4853; https://doi.org/10.3390/su11184853
Received: 26 August 2019 / Revised: 31 August 2019 / Accepted: 1 September 2019 / Published: 5 September 2019
The Antarctic Circumpolar Current (ACC) plays an important role in the climate as it balances heat energy and water mass between the Pacific and Atlantic Oceans through the Drake Passage. However, because the historical measurements and observations are extremely limited, the decadal and long-term variations of the ACC around the western South Atlantic Ocean are rarely studied. By analyzing reconstructed sea surface temperatures (SSTs) in a 147-year period (1870–2016), previous studies have shown that SST anomalies (SSTAs) around the Antarctic Peninsula and South America had the same phase change as the El Niño Southern Oscillation (ENSO). This study further showed that changes in SSTAs in the regions mentioned above were enlarged when the Pacific Decadal Oscillation (PDO) and the ENSO were in the same warm or cold phase, implying that changes in the SST of higher latitude oceans could be enhanced when the influence of the ENSO is considered along with the PDO. View Full-Text
Keywords: Antarctic Circumpolar Current; ENSO; HadISST; sea surface temperature; Pacific Decadal Oscillation; SST; superpositioning Antarctic Circumpolar Current; ENSO; HadISST; sea surface temperature; Pacific Decadal Oscillation; SST; superpositioning
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Wang, Y.-L.; Hsu, Y.-C.; Lee, C.-P.; Wu, C.-R. Coupling Influences of ENSO and PDO on the Inter-Decadal SST Variability of the ACC around the Western South Atlantic. Sustainability 2019, 11, 4853.

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