Upwelling characteristics during El Nino 2015 in Maluku Sea

Atmadipoera, Agus S.; Khairunnisa, Z; Kusuma, Denny Wijaya

doi:10.1088/1755-1315/176/1/012018

Cited by 14 publications

(13 citation statements)

References 14 publications

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“…Coastal upwelling brings colder, higher saline, and nutrients-rich from deeper layer to sea surface. Surfacing of relatively colder water with isotherms of 24.5°C and 26°C from about 60 m depth to the sea surface have been found during peak of upwelling period in southern Makassar Strait and in Banggai waters in Maluku Sea (Utama et al, 2017;Atmadipoera et al, 2018). Regeneration of the upwelled nutrients-rich water are then Figure 1.…”

Section: Introductionmentioning

confidence: 94%

“…In southern tips of Makassar Strait, modelling study showed that southeasterly wind-driven upwelling was modulated by southward surface Indonesian Throughflow from and its intensity is also reduced by leakage of inflow from Selayar Strait (Atmadipoera & Widyastuti, 2015). In western Maluku Sea near Banggai waters close to equatorial region, coastal upwelling is forced by fully developed southerly monsoon winds that blow over small islands of Taliabu and Banggai islands creating upwelled water near coastal waters and flowing northward (Atmadipoera et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal Upwelling in the Northern Arafura Sea from Multi-datasets in 2017

Atmadipoera¹,

Almatin²,

Zuraida³

et al. 2020

JST

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Seasonal upwelling phenomenon in the Arafura Sea plays an important role on supplying upwelled nutrient-rich water to sustain biogeochemistry processes and thus contributes to high marine primary productivity and fisheries resources in this region. The objective of this research was to investigate physical process and dynamics of upwelling by analyzing stratification of seawater properties, evolution of surface ocean-atmosphere parameters, and current structure and transport volume in the northern Arafura Sea. The multi-datasets in 2017 were used in this study, acquired from field CTD measurement, satellite-derived sea surface parameters, and the ocean general circulation model outputs, which were processed and analyzed using the available standard procedure. It was found that upwelling event was associated with a sharp subsurface thin layer that upsloping isotherms (23.5 - 25.5°C), isohalines (33.50 - 34.25 psu), and isopycnals (21.8 - 23.2 kg/m³) from the shelf-break region to the inner shelf region at a distance of approximately 167 km. This barrier layer separated the first surface mixed layer from the second mixed layer beneath the subsurface layer. The model suggests that the current in these two layers is in the opposite direction, to the west in the first layer as a response to the Ekman drift and to the east in the second layer as a current extension from deep Aru basin. Therefore, upwelling dynamics here is not only generated by the southeasterly monsoon winds from May (onset) to November (termination) that transport warm and fresh surface water away from the shelf, but also modulated by the presence of strong inflow currents beneath subsurface that supply colder saltier nutrient-rich water into the shelf. During the upwelling period, mean transport volume in the upper 25 m depth between Aru and Papua at 134.25°E was -0.28 (±0.34) Sv (westward), but the transport volume between 25m and 110m depth was +1.06 (±0.29) Sv (eastward), suggesting this inflow may regulate the upwelling and supply Arafura shelf water.

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Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Seasonal Upwelling in the Northern Arafura Sea from Multi-datasets in 2017

Atmadipoera¹,

Almatin²,

Zuraida³

et al. 2020

JST

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“…In the Banggai area of the Maluku Sea, upwelling occurs from June to October during the southeastern monsoon season, with maximum upwelling strength in September. Atmadipoera et al (2018) investigated interannual variations of the upwelling strength in the Maluku Sea between 2008 and 2015, and found that the magnitude of upwelling in 2015 (El Niño event) was the strongest, in contrast to the 2010 upwelling (La Niña event), which was the weakest, suggesting a significant influence of ENSO on upwelling intensity. In the Eastern Indian Ocean along the Sumatran and Javanese coasts, the southeasterly monsoon is responsible for the upwelling process in southwestern Sumatra and southern Java regions.…”

Section: Water Mass Transformation and Upwelling In The Indonesian Seasmentioning

confidence: 99%

The Indonesian Throughflow and its Impact on Biogeochemistry in the Indonesian Seas

Taufiqurrahman

Wahyudi

Masumoto

2020

AJSTD

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It has been widely known that the Indonesian Throughflow (ITF) is an important inter-ocean connection with unique and complex oceanographic and geographic conditions, as well as a strong relation to both regional and global ocean currents and climate systems. Many studies on characteristics, mechanisms, and impacts of the ITF have been conducted, mainly focusing on the ITF pathways, transport, water mass mixing processes, and their variability in connection with monsoons and climate systems. In this paper, we summarize some of the critical aspects related to ocean conditions within the Indonesian Seas and the Indonesian Throughflow, with the main focus on studies of marine biogeochemistry in a region affected by the ITF. Although the biogeochemical cycle is one of the key research topics that are needed to advance our ocean understanding, studies on marine biogeochemistry within the Indonesian Seas are quite limited due to less observed data compared to the physical parameters. Further studies on biogeochemistry and efforts to conduct in situ and remotely sensed observations in this region are strongly required. Here, we propose several biogeochemical observations correlated to the ITF.

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“…Banggai waters in the southern Maluku Sea are one of the upwelling spots [4]. Upwelling is a process of rising sea water masses from deep layers to the surface.…”

Section: Introductionmentioning

confidence: 99%

Water masses stratification and circulation in the southern part of Banggai Upwelling Region in Maluku Sea

Ryanto,

Atmadipoera,

Basit

et al. 2024

BIO Web Conf.

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Banggai Waters is in the western Maluku Sea, where the secondary pathway of Indonesian Throughflow passes and seasonal coastal upwelling takes place in this region, providing a high marine productivity and potential fishing ground. This study aims to describe water mass stratification and circulation using CTD casts and SADCP section datasets from the BUDEE cruise in September 2022 onboard RV Baruna Jaya VIII. The results show that mixed layer depth varies between 43-112 m with a mean temperature of 25.82(± 0.88) ºC. North Pacific water origin (NPSW and NPIW) is present in this southern section. The depth of chlorophyll maximum is much shallower in the upwelling center. Furthermore, for the first time, we identified a strong northward flow from the Bote Strait, disrupting Banggai upwelling water with cooler and fresher Banda water. Estimates of northward transport volume through this strait is about 0.531 Sv.

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Upwelling characteristics during El Nino 2015 in Maluku Sea

Cited by 14 publications

References 14 publications

Seasonal Upwelling in the Northern Arafura Sea from Multi-datasets in 2017

Seasonal Upwelling in the Northern Arafura Sea from Multi-datasets in 2017

The Indonesian Throughflow and its Impact on Biogeochemistry in the Indonesian Seas

Water masses stratification and circulation in the southern part of Banggai Upwelling Region in Maluku Sea

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