Currents in the Celebes and Maluku Seas, February 1999

Kashino, Yuji; Firing, Eric; Hacker, Peter; Sulaiman, Albertus; Lukiyanto,

doi:10.1029/2000gl011630

Cited by 45 publications

(26 citation statements)

References 10 publications

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“…The MC was weak, with a mean current speed of 0.99 m s 21 at 100 m depth, compared with results from a previous mooring observation period in -2001. The variability of the MC was of the same order as previous observation results, i.e., the MC was again stable during 2011-2012.…”

Section: Discussionsupporting

confidence: 69%

Ocean variability east of Mindanao: Mooring observations at 7°N, revisited

2015

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Two subsurface moorings were deployed east of Mindanao Island, the Philippines, at 7°01′N, 126°55′E and 7°01′N, 127°46′E, at the location of the inshore and offshore cores of the Mindanao Undercurrent (MUC) suggested by past studies, from September 2011 to October 2012 and March 2013. A steady northward undercurrent, the MUC, was not confirmed by these observations, not only at the location of its inshore core but also of the offshore core. The observed mean flow at the mooring sites seems to be part of an anticyclonic eddy rather than the MUC. A particle‐tracking experiment using a high‐resolution general circulation model output showed that the northward mean flow, called the MUC by past studies, was too weak to advect water to the north. The Mindanao Current during 2011–2012 was weaker than during 1999–2002 because the sea surface height in the Philippine Sea during 2011–2012 was lower than that during 1999–2002. Intraseasonal variability with periods of 50–100 days was observed at the mooring sites, comparable to the previous observations during 1999–2002. Westward signal propagations were observed with periods and speeds of 50 days and 0.20 m s−1 at 300 m depth and of 60–72 days and 0.11–0.14 m s−1 at 960 m depth.

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Section: Discussionsupporting

confidence: 69%

Ocean variability east of Mindanao: Mooring observations at 7°N, revisited

2015

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“…The Mindanao Current (MC) originates from the bifurcation of trade wind-driven, westward-flowing North Equatorial Current (NEC) at~13°N near the Philippines (e.g., Qiu & Lukas, 1996;Qu & Lukas, 2003;Toole et al, 1990). It flows southward along the Mindanao coast to~4°N, feeding the Indonesian throughflow and the North Equatorial Countercurrent (NECC) with North Pacific water (e.g., Fine et al, 1994;Kashino et al, 2001;Li & Wang, 2012;Philander et al, 1987;Qu et al, 1999). The MC's variability in either volume transport or water temperature can be important for heat redistribution over the tropical Indo-Pacific Oceans (Hu et al, 2015;Lukas et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Multidecadal Change of the Mindanao Current: Is There a Robust Trend?

Duan

Wang

et al. 2019

Geophysical Research Letters

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Ten ocean state estimate products are analyzed to quantify the multidecadal change of the Mindanao Current (MC). These data sets suggest multidecadal trends of the MC transport since 1961, 1980, and 1993 are weak (‐0.3 Sv, +0.7 Sv, and +2.1 Sv, respectively; 1 Sv ≡ 106 m3/s) and not robust with respect to the large spread of different data sets. The primary cause is the discrepancies in different wind data sets, and change of the North Equatorial Current's bifurcation latitude also acts to attenuate the MC change. The bifurcation latitude shifts southward (northward) under enhanced (weakened) northeasterly trade winds and feeds less (more) water to the MC. Experimental simulations of a reduced‐gravity model forced by reanalysis and model‐projected wind trends suggest an asymmetry of the MC's response to wind forcing. Anomalous westerly winds in the western Pacific can dramatically enhance the MC through spinning up the cyclonic local recirculation.

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“…6a) Fig. 7) of wluch horizontal scale is much smaller than the past studies (Lukas et al, 1991;Kashino et al, 1996Kashino et al, , 1999. The axis of the NECC directed southeastward and may convey the water mass mreclly in the smaller HE sections A-B, and E-F. at the nearest point to t h e -M i n h o coast (point F), the salinity of the NPTW was observed slightly hqher than that was found in the section A-B.…”

Section: ) Resulfs From Fhe Orfober 2001 Cruisementioning

confidence: 67%

“…Currents and dynamic height distribution. Region of recurving cument of the NGCCiNGCUC and the HE is indicated by high dynamic height anomaly, on the conmy, the ME is characterized by a depression of sea surface height (Lukas et al, 1991;Kashino et al, 1996Kashino et al, , 1999Qu et al, 1999). During this cruise, highest dynamic height above 1.85 dyn.…”

Section: ) Resulfs From Fhe Orfober 2001 Cruisementioning

confidence: 97%

“…and relatively low salinity water originated in the Mindanao Current (MC) from the northem hemisphere. It influences significantly on salinity variation in the thennocline and intermediate u'ater layers in and around the confluence region (Fine et al, 1994;Qin et al, 1999;Kashino et al, 1996Kashino et al, , 1999. Inside those re-curving currents regia& two transient eddies are formed whch are known as the clockwise Halmahera eddy (HF,) and the anticlockwise Mindanao eddy (ME) (Fig.…”

Section: Introductionmentioning

confidence: 96%

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Water mass variation in the upper layer of the Halmahera eddy region observed from a TRITON buoy

Atmadipoera

Kuroda²,

Pariwono³

et al.

Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600)

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Time change of water propetlies in the upper layer associated with development of the Halmahera eddy, and water mass front between the northem and southem hemispheres water in their contluence region are investigated using the TFUTON buoy data and hydrographic survey in the westem equatorial Pacific conducted by JAMSTEC and joinlly with BPPT Indonesia. Ohervation period of TRITON buoy in the Halmahera eddy region (2°N;1300E) is from October 2001 to November 2002, while two hydrographic surveys data carried out by the RIV MIRAl in October 2001 and July 2002 are used to complement the TRITON data It is shown that the Southem Pacific Tropical Water (SPTW) with salinity above 35.0 psu and occupied between 22.5 and 26.0 siyla-theta was clearly observed almost during the observation period. However, an anomalous intrusion of the North Pacific Tropical Water (NPTW) with salinity less than 34.85 psu and centered at 23.5 sigma-theta into the S P W s dominated region was found during October 2001. It is considered that during this period pan o f strong southward flowing of the Mindanao Current which supplied the NPTW was observed further to south of 2"N. as confirmed by hydrographic swvey dam. It is concluded that during this observation period the front between the southem and northem hemispheres water was taken place around P N . However, in summer monsoon (July 2002) when the northwestward flowing o f the New Guinea Coastal Current and Undercurrent which supplied high salinity water of the SPTW were fully developed, the front w8s shifted to near SON. The variability of surface c u r e d , dynamic height; and 20°C isotherm depth from the TRITON buoy indicated the dominant oscillation around 35 -65 days period which may link to the Halmahera eddy activities because the time series of salinily on the surface of 24.5 sigmatheta changed ai the similar time period.

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Currents in the Celebes and Maluku Seas, February 1999

Abstract: Abstract. Upper ocean currents in the Celebes

Cited by 45 publications

References 10 publications

Ocean variability east of Mindanao: Mooring observations at 7°N, revisited

Ocean variability east of Mindanao: Mooring observations at 7°N, revisited

Multidecadal Change of the Mindanao Current: Is There a Robust Trend?

Water mass variation in the upper layer of the Halmahera eddy region observed from a TRITON buoy

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