Detecting Change in the Indonesian Seas

Sprintall, Janet; Gordon, Andrew; Wijffels, Susan E.; Feng, Ming; Hu, Shijian; Koch-Larrouy, Ariane; Phillips, Helen E.; Nugroho, Dwiyoga; Napitu, Asmi M.; Pujiana, Kandaga; Susanto, R. Dwi; Sloyan, Bernadette M.; Yuan, Dongliang; Riama, NF; Siswanto, Siswanto; Kuswardani, Anastasia; Arifin, Zainal; Wahyudi, A. 'an J.; Zhou, Haihua; Nagai, Taira; Ansong, JK; Bourdallé‐Badie, Romain; Chanut, Jérôme; Lyard, Florent; Arbic, Brian K.; Ramdhani, Andri; Setiawen, A

doi:10.3389/fmars.2019.00257

Cited by 92 publications

(96 citation statements)

References 157 publications

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“…One of the longest running transport measurements in the Indonesian region comes from the frequently repeated IX01 (Fremantle, Western Australia to Java) XBT section with approximately 18 repetitions per year since sampling began in 1983. Estimates of upper ocean temperature and geostrophic transport of the Indonesian Throughflow (ITF) therefore extend back 35 years (Sprintall et al, 2019). This remarkable XBT record confirms that the shallow ITF transport increases during La Niña and decreases during El Niño (Wijffels et al, 2008), but this effect is greatly weakened by canceling from in-phase wind forcing in the Indian Ocean associated with the IOD (Wijffels and Meyers, 2004;Liu et al, 2015).…”

Section: Indonesian Throughflowmentioning

confidence: 70%

More Than 50 Years of Successful Continuous Temperature Section Measurements by the Global Expendable Bathythermograph Network, Its Integrability, Societal Benefits, and Future

et al. 2019

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in ocean heat content (OHC), sea level change, and meridional ocean heat transport. Here, we present key scientific advances in understanding the changing ocean and climate system supported by XBT observations. Improvement in XBT data quality and its impact on computations, particularly of OHC, are presented. Technology development for probes, launchers, and transmission techniques are also discussed. Finally, we offer new perspectives for the future of the Global XBT Network.

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Section: Indonesian Throughflowmentioning

confidence: 70%

More Than 50 Years of Successful Continuous Temperature Section Measurements by the Global Expendable Bathythermograph Network, Its Integrability, Societal Benefits, and Future

et al. 2019

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“…The eastward current between 350 and 950 m can be seen in the simulations of the INDESO, which is similar to the sandwich structure simulated by the LCSM (Figure 8). Mooring observed westward ASV in the whole water column in the Ombai Strait (Sprintall et al, 2019) could not be simulated by both models. The study of Potemra et al (2003) also shows the similar structure in the Ombai Strait.…”

Section: 1029/2020jc016082mentioning

confidence: 78%

Moored Observations of the Savu Strait Currents in the Indonesian Seas

Wang

Yuan

et al. 2020

JGR Oceans

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The currents in the Savu Strait are observed using a subsurface mooring from November 2016 to September 2017. The mean volume transport of the Savu Strait into the Indian Ocean is estimated to be 3.0 Sv (1 Sv = 106 m3/s), with a standard deviation of 14.3 Sv. The vertical profile of the mean currents features a sandwich structure, with southwestward currents into the Indian Ocean in the upper 280 m and lower 700 m and weak northeastward currents in between. The analyses suggest that the currents flow into the Savu Sea from the west (through the Sumba and Savu Straits) and northeast (through the Ombai Strait) between 280 and 700 m, which suggests southward transport toward the Indian Ocean only in the unmeasured Dao Strait based on the conservation of mass inside the Savu Sea. These results underline the importance of circulation in the Savu Sea in the exchange between the Indonesian seas and the Indian Ocean. A linear continuously stratified model and high‐resolution regional INDESO model are used to investigate the variability and dynamics of the Savu Strait current. The existence of the northeastward current in the middle layer suggests the important role of baroclinic mode processes. Simulations also suggests that current in the Savu Strait is forced remotely by the zonal winds over the equatorial Indian Ocean, which propagate eastward along the coasts of the Nusa Tenggara island chain as coastal Kelvin waves.

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“…Closing the sealevel budget (Leuliette, 2015;WCRP Global Sea Level Budget Group, 2018) requires accurate knowledge of ocean bathymetry (Woelfl et al, 2019), ocean sea level (Ponte et al, 2019), barystatic changes (mass of freshwater added or removed; Palmer et al, 2019), and thermostatic changes (e.g., changes in heat content; Meyssignac et al, 2019). Multipurpose acoustic observing systems will contribute to improved monitoring of volume, freshwater, and long-term heat fluxes, as well as monitoring long-term heat content changes at basin-scale, as well as in specific regions of global importance (e.g., Indonesian throughflow; Ravichandran, 2011;Sprintall et al, 2019). Multipurpose acoustic systems can provide ground-truth for ecosystem modeling and forecasting.…”

Section: Discussionmentioning

confidence: 99%