Dynamics of the South Java Current in the Indo‐Australian Basin

Sprintall, Janet; Chong, Jackson; Syamsudin, Fadli; Morawitz, Werner; Hautala, Susan; Bray, N. A.; Wijffels, Susan E.

doi:10.1029/1999gl002320

Cited by 111 publications

(117 citation statements)

References 9 publications

(2 reference statements)

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“…The poleward propagation of the downwelling coastal Kelvin wave raises the sea level along the Indonesian wave guide of Sumatra and the Lesser Sunda Islands Liu, 1993, 1994], causes maximum eastward flow of the semi-annually reversing South Java Current [Quadfasel and Cresswell, 1992], and may temporarily reverse the alongstrait pressure gradient within the Lesser Sunda passages [Hautala et al, 2001]. In May 1997, a semiannually forced Kelvin wave resulted in eastward flow of very fresh, warm water in the South Java Current [Sprintall et al, 1999], with subsequent northward flow observed up through Lombok Strait and past a mooring in Makassar Strait ].…”

Section: Model Skillmentioning

confidence: 99%

Pathways of intraseasonal variability in the Indonesian Throughflow region

Schiller

Wijffels

Sprintall

et al. 2010

Dynamics of Atmospheres and Oceans

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Section: Model Skillmentioning

confidence: 99%

Pathways of intraseasonal variability in the Indonesian Throughflow region

Schiller

Wijffels

Sprintall

et al. 2010

Dynamics of Atmospheres and Oceans

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“…The WOCE observation tracks did not cover Java-Sumatra coast well, especially the south Java shelf region. A strong semiannual South Java Current (SJC) was observed from one year mooring record [18]. Recently Sprintall et al [8] updated the SJC and South Java Under Current (SJUC) as they were inferred from the current moorings situated at Ombai Strait.…”

Section: Introductionmentioning

confidence: 99%

“…The observations made from current meters moored at the Java coast suggest that the arrival of Kelvin wave originating from the equatorial Indian Ocean causes a warming of water column in the south Java coast. Following the wave passage, the coastal currents along south Java are north-westward and the prevailing southeasterly monsoon winds lead to upwelling of salty subsurface water [18].…”

Section: Introductionmentioning

confidence: 99%

A Short Surface Pathway of the Subsurface Indonesian Throughflow Water from the Java Coast Associated with Upwelling, Ekman Transport, and Subduction

Valsala

Maksyutov

2010

International Journal of Oceanography

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A surface pathway of the subsurface Indonesian Throughflow (ITF) in the southeastern Indian Ocean is proposed using a combined analysis of Lagrangian particles and passive tracers derived from two independent tools: an Ocean General Circulation Model (OGCM) and Simple Ocean Data Assimilation (SODA.2.0.2) reanalysis data. This newly suggested pathway follows the processes in succession as upwelling in the south Java coast, offshore Ekman drift and subduction into the thermocline centered on 20• S. The upwelling of subsurface ITF along the south Java coast is found to occur from August to October. Upon surfacing, the ITF advects southwestward being trapped in the surface Ekman layer for an approximate period of 260 days and reaches the southeastern tropical Indian Ocean subduction zone centered on 20• S which is demarcated by the Zero Wind Stress Curl (ZWSC) and subducts there. The particle trajectory revealed that during the subduction within the ZWSC region, the surface eastward flow above 120 m depth carries the particle about 10• to the east and westward flow below this depth carries the particle to the western Indian Ocean along the thermocline. These pathways are confirmed by a series of tracer experiments using SODA reanalysis data. The effects of vertical mixing and entrainment on the surfacing of the ITF at south Java coast were identified.

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“…During winter monsoon, the South Java Current (SJC) flows southeastward and this flow becomes strong in May and November when westerly wind bursts formed during the monsoon transition (Quadfasel and Cresswell, 1992;Sprintall et al, 1999). On the other hand, the SJC flows as a westward current along the coast of Java during the summer monsoon (May-October).…”

Section: Regional Settingmentioning

confidence: 99%

Evolution of anthropogenic Pb and Pb isotopes in the deep North Atlantic Ocean and the Indian Ocean

Lee¹

2013

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, in partial fulfillment of the Requirement for the degree of Doctor of PhilosophyPb and Pb isotopes in the ocean have varied on decadal to centennial time scales due to anthropogenic Pb inputs. Thus, tracing the temporal variation of Pb and Pb isotopes in the ocean provides information on the major sources of Pb and the transport of Pb from sources to the ocean surface and into the ocean interior. In this thesis study, first, a method was developed for the analysis of dissolved Pb and other trace elements in seawater using single batch nitrilotriacetate resin extraction and isotope dilution ICP-MS, which was applied in analyzing seawater Pb concentrations in the rest of the study. A -550 year history of the Pb and Pb isotopes in the deep North Atlantic Ocean is reconstructed using a deep-sea coral, showing the infiltration of anthropogenic Pb to deep sea. Comparing the results to the surface North Atlantic Ocean Pb record using a Transit Time Distribution model, the mean transit time of Pb is estimated to be -64 years. This is longer than the transit time estimate assuming simple advection from a source, showing the importance of advective-diffusive mixing in the transport of Pb to the ocean interior. The later part of the thesis investigates Pb in the Indian Ocean, where no useful Pb data have been previously reported. First, using annually-banded surface growing corals, I reconstruct variations of Pb and isotopes in the surface waters of the central and eastern Indian Oceans during the past half-century. Results of the study show the increase of Pb concentrations from the mid-1970s, and major sources of the Pb are discussed, including leaded gasoline and coal burning, based on their emission histories and Pb isotope signatures. Second, Pb concentration and isotope profiles are presented from the northern and western Indian Oceans. AcknowledgementI would like to thank all the people who made this work possible. First, I owe a big thank to my advisor Ed Boyle. He taught me a lot about trace metal techniques, guided me to find right and important scientific questions whenever I was lost, and supported all my work. Not only that, he was also supportive of me having a family, very understanding and patient, which I cannot be grateful enough.I'd like to thank my committee: Bill Jenkins, Carl Lamborg, Phoebe Lam, and Konrad Hughen. Interests they showed during committee meetings were so inspiring and encouraging. I usually had this magical experience that my work, which looked so boring beforehand, turns into the most interesting one in the world after the committee meeting.I also would like to thank Jess Adkins and Selene Eltgroth, who provided the deep-sea coral and the radiocarbon data used in Chapter 3, and shared their expertise in deep-sea coral analysis with me. My work in Chapter 4 and 5 could not be completed without these people who helped me to collect corals and seawater samples from the Indian Ocean: Miriam Pfeiffer, Aron Meltzner, Kerry Sieh, Bambang Suwargadi, Danny Natawidjaja, Toshitaka Gamo, Hajim...

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Dynamics of the South Java Current in the Indo‐Australian Basin

Abstract: Abstract.A

Cited by 111 publications

References 9 publications

Pathways of intraseasonal variability in the Indonesian Throughflow region

Pathways of intraseasonal variability in the Indonesian Throughflow region

A Short Surface Pathway of the Subsurface Indonesian Throughflow Water from the Java Coast Associated with Upwelling, Ekman Transport, and Subduction

Evolution of anthropogenic Pb and Pb isotopes in the deep North Atlantic Ocean and the Indian Ocean

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