Abstract
Eddy kinetic energy (EKE) in the Celebes Sea (CS) is investigated using a global, eddy-resolving, ocean general circulation model (OGCM) output. The OGCM simulation shows that a strong EKE is confined in the upper 300-m layer. The period of EKE variability varies with depth. In the 0–100-m layer, EKE has a distinct annual cycle that is strong in winter (December–February) and weak in summer (June–August). However, in the 100–300-m layer, semi-annual variation is dominant, which shows stronger EKE in spring and fall and weaker EKE in summer and winter. An eddy energy budget analysis reveals that the barotropic eddy energy conversion rate has a vertical structure similar to that of EKE. Compared to the barotropic eddy energy conversion rate, the baroclinic eddy energy conversion rate is much smaller and does not match the EKE vertical pattern. The budget analysis indicates that the variation in EKE in the CS is governed by barotropic instability of the background circulation. Further analysis reveals that the variation in the regional background circulation with depth is due to a combination of the forcing of the local monsoon and the Mindanao Current (MC) in the western tropical Pacific.
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Atmadipoera AS, Mubaraq GL (2016) Structure and variability of Indonesian throughflow at Sulawesi Sea. J Kelautan Nasional 11(3):159–171. https://doi.org/10.15578/jkn.v11i3.6116
Broecker WS (1991) The great ocean conveyor. Oceanography 4:79–89. https://doi.org/10.5670/oceanog.1991.07
Chen X, Qiu B, Chen SM, Qi YQ, Du Y (2015a) Seasonal eddy kinetic energy modulations along the North Equatorial Countercurrent in the western Pacific. J Geophys Res Oceans 120(9):6351–6362. https://doi.org/10.1002/2015JC011054
Chen X, Qiu B, Cheng XH, Qi YQ, Du Y (2015b) Intra-seasonal variability of Pacific-origin sea level anomalies around the Philippine Archipelago. J Oceanogr 71:239–249. https://doi.org/10.1007/s10872-015-0281-9
Chen X, Qiu B, Chen SM, Cheng XH, Qi YQ (2018) Interannual modulations of the 50-day oscillations in the Celebes Sea: dynamics and impact. J Geophys Res Oceans 123:4666–4679. https://doi.org/10.1029/2018JC013960
Cheng XH, Xie SP, McCreary JP, Qi YQ, Du Y (2013) Intraseasonal variability of sea surface height in the Bay of Bengal. J Geophys Res Oceans 118:816–830. https://doi.org/10.1002/jgrc.20075
Cheng XH, McCreary JP, Qiu B, Qi YQ, Du Y, Chen X (2018) Dynamic of eddy generation in the central Bay of Bengal. J Geophys Res Oceans 123:6861–6875. https://doi.org/10.1029/2018JC014100
Ffield A, Gordon AL (1996) Tidal mixing signatures in the Indonesian Seas. J PhysOceanogr 26:1924–1937. https://doi.org/10.1175/1520-0485(1996)026<1924:TMSITI>2.0.CO;2
Fine RA, Lukas R, Bingham FM, Warner MJ, Gammon RH (1994) The western equatorial Pacific: a water mass crossroads. J Geophys Res 99:C12. https://doi.org/10.1029/94JC02277
Gordon AL (1986) Inter-ocean exchange of thermocline water. J Geophys Res 91:5037–5046. https://doi.org/10.1029/JC091iC04p05037
Gordon AL (2005) Oceanography of the Indonesian Seas and their throughflow. Oceanography 18(4):14–27. https://doi.org/10.5670/oceanog.2005.01
Gordon AL, Fine RA (1996) Pathways of water between the Pacific and Indian oceans in the Indonesian seas. Nature 379(6561):146–149. https://doi.org/10.1038/379146a0
Gordon AL, Huber B, Metzger EJ, Susanto RD, Hurlburt HE, Adi T (2012) South China Sea throughflow impact on the Indonesian throughflow. Geophys Res Lett 39:L11602. https://doi.org/10.1029/2012GL052021
Hu XY, Sprintall J, Yuan DL, Tranchant B, Gaspar P, Koch-Larrouy A et al (2019) Interannual variability of the Sulawesi Sea circulation forced by Indo-Pacific planetary waves. J Geophys Res Oceans 124:1616–1633. https://doi.org/10.1029/2018JC014356
Ilahude AG, Gordon AL (1996) Thermocline stratification within the Indonesian Seas. J Geophys Res 101(C5):12401–12409. https://doi.org/10.1029/95JC03798
Johnson ES (1996) A convergent instability wave front in the central tropical Pacific. Deep Sea Res II 43(4):753–778. https://doi.org/10.1016/0967-0645(96)00034-3
Kashino Y, Watanabe H, Herunadi B, Aoyama M, Hartoyo D (1999) Current variability at the Pacific entrance of the Indonesian throughflow. J Geophys Res 1041(C5):11021–11036. https://doi.org/10.1029/1999JC900033
Kashino Y, Firing E, Hacker P, Sulaiman A (2001) Currents in the Celebes and Maluku Seas, February 1999. Geophys Res Lett 28(7):1263–1266. https://doi.org/10.1029/2000GL011630
Kashino Y, Ishida A, Kuroda Y (2005) Variability of the Mindanao current: Mooring observation results. Geophys Res Lett 32:L18611. https://doi.org/10.1029/2005GL023880
Li MT, Gordon AL, Wei J, Gruenburg LK, Jiang GQ (2018) Multi-decadal timeseries of the Indonesian throughflow. Dynam Atmos Oceans 81:84–95. https://doi.org/10.1016/j.dynatmoce.2018.02.001
Lukas R, Firing E, Hacker P, Richardson PL, Collins CA, Fine R, Gammon R (1991) Observations of the Mindanao Current during the Western Equatorial Pacific-Ocean circulation study. J Geophys Res 96(C4):7089–7104. https://doi.org/10.1029/91JC00062
Masumoto Y, Kagimoto T, Yoshida M, Fukuda M, Hirose N, Yamagata T (2001) Intraseasonal eddies in the Sulawesi Sea simulated in an ocean general circulation model. Geophys Res Lett 28(8):1631–1634. https://doi.org/10.1029/2000GL011835
Masumoto Y, Sasaki H, Kagimoto T, Komori N, Ishida A, Sasai Y, Miyama T, Motoi T, Mitsudera H, Takahashi K (2004) A fifty-year eddy-resolving simulation of the world ocean: preliminary outcomes of OFES (OGCM for the Earth Simulator). J Earth Simul 1:35–56
McWilliams JC (2006) Fundamentals of geophysical fluid dynamics. Cambridge Univ Press, Cambridge, UK, pp. 102–103. doi: 10.2277/052185637X.
Napitu AM, Gordon AL, Pujiana K (2015) Intraseasonal sea surface temperature variability across the Indonesian Seas. J Climate 28:8710–8725. https://doi.org/10.1175/JCLI-D-14-00758.1
Nitani H (1972) Beginning of the Kuroshio, In: H. Stommel and K. Yashida (eds) Kuroshio: Physical aspects of the Japan current. University of Washington Press, Seattle, pp. 129–163. doi: 10.1017/S0022112074222213.
Pujiana K, Gordon AL, Sprintall J, Susanto RD (2009) Intraseasonal variability in the Makassar Strait thermocline. J Mar Res 67:757–777. https://doi.org/10.1357/002224009792006115
Qiu B, Chen SM (2010) Interannual-to-decadal variability in the bifurcation of the North Equatorial Current off the Philippines. J Phys Oceanogr 40:2525–2538. https://doi.org/10.1175/2010JPO4462.1
Qiu B, Lukas R (1996) Seasonal and interannual variability of the North Equatorial Current, the Mindanao Current and the Kuroshio along the Pacific western boundary. J Geophys Res 101:12315–12330. https://doi.org/10.1029/95JC03204
Qiu B, Mao M, Kashino Y (1999) Intraseasonal variability in the Indo-Pacific Throughflow and the regions surrounding the Indonesian Seas. J Phys Oceanogr 29:1599–1618. https://doi.org/10.1175/1520-0485(1999)029<1599:IVITIP>2.0.CO;2
Ren QP, Li YL, Wang F, Song LN, Liu CY, Zhai FG (2018) Seasonality of the Mindanao current/undercurrent system. J Geophys Res Oceans 123:1105–1122. https://doi.org/10.1002/2017jc013474
Sasaki H, Sasai Y, Kawahara S, Furuichi M, Araki F, Ishida A, Yamanaka Y, Masumotom Y, Sakuma H (2004) A series of eddy-resolving ocean simulations in the world ocean: OFES (OGCM for the Earth Simulator) project, vol. 3, IEEE TECHNO-OCEAN’ 04, N, J, pp. 1535–1541. doi: 10.1109/OCEANS.2004.1406350.
Sasaki H, Nonaka M, Masumoto Y, Sasai Y, Uehara H, Sakuma H (2008) An eddy-resolving hindcast simulation of the quasiglobal ocean from 1950 to 2003 on the Earth Simulator. In: K. Hamilton and W. Ohfuchi (eds) High Resolution Numerical Modelling of the Atmosphere and Ocean, Springer, New York, pp. 157–185. doi: 10.1007/978-0-387-49791-4_10.
Schlax MG, Chelton DB (1994) Aliased tidal errors in TOPEX/POSEIDON sea surface height data. J Geophys Res Atmos 99(C12):24761–24775. https://doi.org/10.1029/94JC01925
Shinoda T, Han WQ, Metzger EJ, Hurlburt HE (2012) Seasonal variation of the Indonesian throughflow in Makassar Strait. J Phys Oceanogr 42:1099–1123. https://doi.org/10.1175/JPO-D-11-0120.1
Sprintall J, Gordon AL, Murtugudde R, Susanto RD (2000) A semiannual Indian Ocean forced Kelvin wave observed in the Indonesian seas in May 1997. J Geophys Res Oceans 105:17217–17230. https://doi.org/10.1029/2000JC900065
Sprintall J, Wijffels SE, Molcard R, Jaya I (2009) Direct estimates of the Indonesian throughflow entering the Indian Ocean: 2004–2006. J Geophys Res 114:C07001. https://doi.org/10.1029/2008JC005257
Sprintall J, Gordon AL, Wijffels SE, Feng M, Hu SJ et al (2019) Detecting change in the Indonesian Seas. Front Mar Sci 6:257. https://doi.org/10.3389/fmars.2019.00257
Susanto RD, Ffield A, Gordon AL, Adi TR (2012) Variability of Indonesian throughflow within Makassar Strait, 2004–2009. J Geophys Res 117:C09013. https://doi.org/10.1029/2012JC008096
Ueki I, Kashino Y, Kuroda Y (2003) Observation of current variations off the New Guinea coast including the 1997–1998 El Nino period and their relationship with Sverdrup transport. J Geophys Res Oceans 108(C7):3243. https://doi.org/10.1029/2002JC001611
Wang Z, Yuan DL (2014) Multiple equilibria and hysteresis of two unequal-transport western boundary currents colliding at a gap. J Phys Oceanogr 44:1873–1885. https://doi.org/10.1175/JPO-D-13-0234.1
Wang F, Wang QY, Hu DX, Zhai FG, Hu SJ (2016) Seasonal variability of the Mindanao current determined using mooring observations from 2010 to 2014. J Oceanogr 72(5):787–799. https://doi.org/10.1007/s10872-016-0373-1
Wei J, Li MT, Rizzoli PM, Gordon AL, Wang DX (2016) Opposite variability of Indonesian throughflow and South China Sea throughflow in the Sulawesi Sea. J Phys Oceanogr 46(10):3165–3180. https://doi.org/10.1175/JPO-D-16-0132.1
Wyrtki K (1961) Physical oceanography of the Southeast Asian waters: Scientific results of marine investigations of the South China Sea and the Gulf of Thailand 1959–1961. NAGA Report, volume 2, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, pp. 195. https://escholarship.org/uc/item/49n9x3t4.
Wyrtki K (1974) Sea level and the seasonal fluctuations of the equatorial currents in the western Pacific Ocean. J Phys Oceanogr 4(1):91–103. https://doi.org/10.1175/1520-0485(1974)004<0091:SLATSF>2.0.CO;2
Yuan DL, Hu XY, Xu P, Zhao X, Masumoto Y, Han WQ (2018a) The IOD-ENSO precursory teleconnection over the tropical Indo-Pacific Ocean: dynamics and long-term trends under global warming. J Oceanol Limnol 36(1):419. https://doi.org/10.1007/s00343-018-6252-4
Yuan DL, Li X, Wang Z, Li Y, Wang J, Yang Y et al (2018b) Observed transport variations in the Maluku channel of the Indonesian Seas associated with western boundary current changes. J Phys Oceanogr 48(8):1803–1813. https://doi.org/10.1007/s00343-018-6252-4
Zhuang W, Xie SP, Wang DX, Taguchi B, Aiki H, Sasaki H (2010) Intraseasonal variability in sea surface height over the South China Sea. J Geophys Res Oceans 115:C04010. https://doi.org/10.1029/2009JC005647
Zhuang W, Qiu B, Du Y (2013) Low-frequency western Pacific Ocean sea level and circulation changes due to the connectivity of the Philippine Archipelago. J Geophys Res Oceans 118:6759–6773. https://doi.org/10.1002/2013JC009376
Acknowledgements
This research was supported by the National Key R&D Program of China (2018YFA0605703), the Natural Science Foundation of China (Grant nos. 41706004 and 41876002), the Natural Science Foundation of Jiangsu Province (Grant no. BK20170872), and the Fundamental Research Funds for the Central Universities (Grant nos. 2017B04614 and 2017B04714). We acknowledge the AVISO sea level data from Copernicus marine environment management service (CMEMS) (https://marine.copernicus.eu/). The OFES simulation was conducted on the Earth Simulator under the support of Japan Agency for Marine-Earth Science and Technology (JAMSTEC). The OFES-QSCAT simulation used in our study is obtained from the APDRC at the University of Hawaii (https://apdrc.soest.hawaii.edu).
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Yang, C., Chen, X., Cheng, X. et al. Annual versus semi-annual eddy kinetic energy variability in the Celebes Sea. J Oceanogr 76, 401–418 (2020). https://doi.org/10.1007/s10872-020-00553-7
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DOI: https://doi.org/10.1007/s10872-020-00553-7