Interannual Modulations of the 50‐Day Oscillations in the Celebes Sea: Dynamics and Impact. Issue 7 (5th July 2018)
- Record Type:
- Journal Article
- Title:
- Interannual Modulations of the 50‐Day Oscillations in the Celebes Sea: Dynamics and Impact. Issue 7 (5th July 2018)
- Main Title:
- Interannual Modulations of the 50‐Day Oscillations in the Celebes Sea: Dynamics and Impact
- Authors:
- Chen, Xiao
Qiu, Bo
Chen, Shuiming
Cheng, Xuhua
Qi, Yiquan - Abstract:
- Abstract: Intense 50‐day oscillations have been previously observed at the entrance of Celebes Sea, and their formation has been suggested to be a result of Rossby wave resonance where the frequency of cyclonic eddy shedding by the intruding Mindanao Current matches that of the gravest Rossby mode of the semienclosed Celebes Sea basin. Using the ocean state estimate of 1993–2016 from the Estimating the Circulation and Climate of the Ocean, Phase II, we detected strong interannual modulations in the shedding of cyclonic eddies at the Celebes Sea entrance. Active eddy sheddings occurred during 1993, 2002–2003, 2006–2010, and 2013–2015. Southward shifting of the wind‐driven North Pacific tropical gyre and the concurrent strengthening of the Mindanao Current southeast of the Mindanao Island in these years are found to be inducive for the generation of cyclonic eddies intruding into the Celebes Sea. Modulated by the activity of eddy sheddings, the upper ocean water mass properties in both the Celebes Sea and Makassar Strait exhibit noticeable interannual changes with less saline waters appearing in the 75‐ to 175‐m layer during the active eddy shedding years. Key Points: Fifty‐day oscillation signals in the Celebes Sea exhibit intense interannual modulations Southward migration of wind‐driven tropical and subtropical gyres is inductive to enhanced 50‐day oscillations inside CS Amplitude of the 50‐day oscillation in the CS affects water mass properties of ITF; enhanced 50‐dayAbstract: Intense 50‐day oscillations have been previously observed at the entrance of Celebes Sea, and their formation has been suggested to be a result of Rossby wave resonance where the frequency of cyclonic eddy shedding by the intruding Mindanao Current matches that of the gravest Rossby mode of the semienclosed Celebes Sea basin. Using the ocean state estimate of 1993–2016 from the Estimating the Circulation and Climate of the Ocean, Phase II, we detected strong interannual modulations in the shedding of cyclonic eddies at the Celebes Sea entrance. Active eddy sheddings occurred during 1993, 2002–2003, 2006–2010, and 2013–2015. Southward shifting of the wind‐driven North Pacific tropical gyre and the concurrent strengthening of the Mindanao Current southeast of the Mindanao Island in these years are found to be inducive for the generation of cyclonic eddies intruding into the Celebes Sea. Modulated by the activity of eddy sheddings, the upper ocean water mass properties in both the Celebes Sea and Makassar Strait exhibit noticeable interannual changes with less saline waters appearing in the 75‐ to 175‐m layer during the active eddy shedding years. Key Points: Fifty‐day oscillation signals in the Celebes Sea exhibit intense interannual modulations Southward migration of wind‐driven tropical and subtropical gyres is inductive to enhanced 50‐day oscillations inside CS Amplitude of the 50‐day oscillation in the CS affects water mass properties of ITF; enhanced 50‐day oscillation lowers ITF's salt content … (more)
- Is Part Of:
- Journal of geophysical research. Volume 123:Issue 7(2018)
- Journal:
- Journal of geophysical research
- Issue:
- Volume 123:Issue 7(2018)
- Issue Display:
- Volume 123, Issue 7 (2018)
- Year:
- 2018
- Volume:
- 123
- Issue:
- 7
- Issue Sort Value:
- 2018-0123-0007-0000
- Page Start:
- 4666
- Page End:
- 4679
- Publication Date:
- 2018-07-05
- Subjects:
- Celebes Sea -- 50‐day oscillation -- interannual variability
Oceanography -- Periodicals
551.4605 - Journal URLs:
- http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)2169-9291 ↗
http://onlinelibrary.wiley.com/ ↗ - DOI:
- 10.1029/2018JC013960 ↗
- Languages:
- English
- ISSNs:
- 2169-9275
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4995.005000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 15452.xml