Article
Multidisciplinary Sciences
Chengyuan Pang, Maxim Nikurashin, Beatriz Pena-Molino, Bernadette M. Sloyan
Summary: In addition to local tidal mixing, remotely generated planetary waves and eddies also contribute to the mixing in the upper ocean of the Indonesian Seas. The intense mixing observed in this region plays a crucial role in the climate of the Indonesian Seas by cooling the surface temperature and affecting atmospheric convection. The energy generated in the Indian and Pacific Oceans is transported to the Indonesian Seas by planetary waves and eddies, and it is estimated that a significant amount of energy enters the region through the straits.
NATURE COMMUNICATIONS
(2022)
Article
Environmental Sciences
Ryo Furue, Masami Nonaka, Hideharu Sasaki
Summary: The Indonesian Throughflow carries an average of 15 Sv of water annually from the Pacific to the Indian Ocean, with a variation of 1 to 4 Sv. A study using a global oceanic circulation model shows that the annual-mean transport of the Indonesian Throughflow differs by about 1 Sv between ensemble members. The variability of the Indonesian Throughflow is attributed to genuine changes in the flow rather than local eddies or currents within the Indonesian Seas, and may be influenced by zonal jets in the western subtropical North Pacific.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Anna Katavouta, Jeff A. Polton, James D. Harle, Jason T. Holt
Summary: The effect of tides on the Indonesian Throughflow (ITF) is investigated in a regional ocean model, revealing that tides have a modest impact on volume, heat and salt transports towards the Indian Ocean. However, tides strongly influence regional transport changes through specific straits and seas, and regulate the distribution of the ITF among them. The study highlights the importance of explicitly considering tides in Earth system models to accurately simulate the ITF pathway and tracer transport into the Indian Ocean.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Geosciences, Multidisciplinary
Yaru Guo, Yuanlong Li, Lijing Cheng, Gengxin Chen, Qinyan Liu, Tian Tian, Shijian Hu, Jing Wang, Fan Wang
Summary: While the estimation of the Indonesian Throughflow (ITF) volume transport remains challenging, this study provides an updated estimate of the monthly ITF geostrophic transport (ITFG) in the upper 700 m between Indonesia and Australia. The improved data correction and new salinity data products help constrain the ITFG estimate. The average ITFG from 1993-2018 is 8.2±0.2 Sv, with contributions from the temperature and salinity components.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Kenji M. Matsuzaki, Ann E. Holbourn, Wolfgang M. Kuhnt, Masayuki Ikeda, Li Gong
Summary: This study analyzed the response of the Indonesian Throughflow and Asian-Australian Monsoon to global climate change and found that these responses are influenced by glacioeustatic sea-level variations and tropical monsoon strength. The variations in radiolarian assemblages associated with climate changes in the source region had a significant impact on sea surface temperatures and the Indonesian Throughflow.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Environmental Sciences
Jie Li, Yuanlong Li, Yaru Guo, Gang Li, Fan Wang
Summary: The southeastern Indian Ocean (SEIO) experiences prominent decadal variability in sea surface salinity (SSS), with decreases from 1995-2000 and 2005-2011 and increases from 2000-2005 and after 2011. This study successfully simulates the decadal SSS variability in the SEIO using a high-resolution regional ocean model and explores the underlying mechanism through sensitivity experiments. It is found that freshwater transport of the Indonesian throughflow (ITF) and local precipitation are the main drivers of the SSS decadal variability.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Wanli Shi, Shijian Hu, Hongji Ma
Summary: The island rule theory is applied to investigate the influence of complex geometry with multiple islands referring to the Indo-Pacific Maritime Continent. Through the use of analytical solutions and sensitivity experiments, the study finds that the multiple island rule reproduces well the observed transport of the Indonesian Throughflow (ITF) and may have implications for paleo-ITF study. The inclusion of wind stress in the North Pacific Ocean improves the estimation of ITF transport.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Oceanography
Mochamad Riza Iskandar, Yanli Jia, Hideharu Sasaki, Ryo Furue, Shinichiro Kida, Toshio Suga, Kelvin J. Richards
Summary: Previous studies have indicated the significant impact of mesoscale eddy activities on the transport and water mass properties of the Indonesian Throughflow (ITF). This study investigates the effects of these eddy activities, or high-frequency flow variability (HFFV), on the residence time and pathway of the ITF. The results reveal contrasting circulation characteristics in the Sulawesi and Banda Seas, with higher HFFV in the former and minimal effects on the ITF in the latter.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Meteorology & Atmospheric Sciences
Edward. D. D. Zaron, Tonia. A. A. Capuano, Ariane Koch-Larrouy
Summary: Twenty years of daily MODIS-Aqua ocean color observations (2002-2022) revealed periodic variability of near-surface chlorophyll (Chl a) in the Indonesian seas, with a prominent peak around the fortnightly tidal period. The spatial distribution of the fortnightly Chl a signal was quantified and mapped, showing significant variability along the continental shelves of NW Australia and at several sites associated with narrow passages between islands. The shallow coastal sites exhibited changes attributed to the spring-neap cycle of barotropic ocean currents, while deeper water near island passages showed variability due to the modulation of vertical nutrient fluxes by baroclinic tidal mixing. These findings highlight the importance of tidal mixing and the heterogeneous nature of biophysical processes in the Indonesian seas.
Article
Environmental Sciences
Michael A. Wulder, David P. Roy, Volker C. Radeloff, Thomas R. Loveland, Martha C. Anderson, David M. Johnson, Sean Healey, Zhe Zhu, Theodore A. Scambos, Nima Pahlevan, Matthew Hansen, Noel Gorelick, Christopher J. Crawford, Jeffrey G. Masek, Txomin Hermosilla, Joanne C. White, Alan S. Belward, Crystal Schaaf, Curtis E. Woodcock, Justin L. Huntington, Leo Lymburner, Patrick Hostert, Feng Gao, Alexei Lyapustin, Jean-Francois Pekel, Peter Strobl, Bruce D. Cook
Summary: Since 1972, the Landsat program has provided 50 years of digital, multispectral, medium spatial resolution observations, playing a crucial role in scientific and technical advancements. The program's early years brought technological breakthroughs and established a template for global Earth observation missions. The knowledge gained from Landsat has been recognized for its economic and scientific value, leading to continuous improvement and increased usage through the introduction of free and open access to data.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Environmental Sciences
Linchao Xin, Shijian Hu, Fan Wang, Wenhong Xie, Dunxin Hu, Changming Dong
Summary: The Indonesian Throughflow (ITF) is a crucial link between the tropical Pacific and Indian Oceans, and understanding its transport is important for climate systems. In this study, a deep-learning approach using a convolutional neural network model was used to reproduce the ITF transport based on sea surface height data. The model showed high accuracy in predicting ITF transport, indicating the potential of using deep-learning methods for forecasting.
FRONTIERS IN MARINE SCIENCE
(2023)
Review
Pharmacology & Pharmacy
Carlo Patrono
Summary: This passage describes the significant impact of Sir John Vane's publication on the pharmacological effects of aspirin and similar drugs, as well as the subsequent discovery of the platelet arachidonic acid metabolism pathway. It also emphasizes the importance of low-dose aspirin as an antiplatelet drug.
BRITISH JOURNAL OF PHARMACOLOGY
(2023)
Article
Environmental Sciences
Harsh Raj, Ashish Narang, Ravi Bhushan
Summary: Shallow seawater coral records were used to study Indonesian throughflow (ITF) in the south-eastern tropical Indian Ocean region. The radiocarbon records of Porites corals were used to estimate lateral transport via ITF and the influence of ITF on radiocarbon levels in surface waters. A box model based on radiocarbon was applied to estimate the lateral transport and to reconstruct post-bomb radiocarbon levels.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2023)
Article
Geography, Physical
Xiaolei Pang, Franck Bassinot, Sophie Sepulcre
Summary: This study presents a Pulleniatina obliquiloculata Mg/Ca-derived thermocline water temperature record covering the past 270,000 years in the south of the Lombok Strait, revealing changes in thermocline water temperature reflecting the balance between wind-driven Java upwelling and the Indonesian Throughflow (ITF) thermocline transport. The relative strength of ITF through time can be deciphered by the evolution of the TWT gradient between the upwelling site and the Lombok site, indicating a significant precession-related component influencing the ITF intensity at the Lombok site.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Mochamad Riza Iskandar, Toshio Suga
Summary: The study examines the change in salinity of Indonesian Upper Water (IUW) in the Indian Ocean and reveals contrasting trends in two time periods. From 2004-2013, IUW experienced freshening, while from 2014-2020, IUW showed a general increase in salinity. The study also highlights the influence of oceanic-atmospheric processes in the Maritime Continent on the IUW salinity changes in the southeastern Indian Ocean.
Article
Multidisciplinary Sciences
Melissa M. Bowen, Denise Fernandez, Aitana Forcen-Vazquez, Arnold L. Gordon, Bruce Huber, Pasquale Castagno, Pierpaolo Falco
Summary: High Salinity Shelf Water from the Drygalski Trough contributes to pulses of dense water at Cape Adare, with the timing and magnitude of the pulses largely influenced by the tidal velocity in the Ross Sea. The study suggests that the diurnal and low frequency tides in the western Ross Sea may control the magnitude and timing of the dense water outflow in the region.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Deborah A. Le Bel, Christopher J. Zappa, Giorgio Budillon, Arnold L. Gordon
Summary: The study reveals that the opening of the Terra Nova Bay polynya not only affects the intensity of ocean water salinity, but is also closely related to atmospheric forcing with predictable lag times. Additionally, temperature variations play a significant role in modulating the oscillations in salinity.
Article
Geosciences, Multidisciplinary
Mingting Li, Dongliang Yuan, Arnold L. Gordon, Laura K. Gruenburg, Xiang Li, Rui Li, Xueli Yin, Ya Yang, Corry Corvianatie, Jun Wei, Song Yang
Summary: The study investigates the poorly resolved pathway of sub-thermocline waters in the Makassar Strait, the main inflow path of the Indonesian Throughflow, using in situ mooring measurements and Argo profiles. The anomalously strong sub-thermocline intrusion in the summer of 2016 is suggested to be linked to the extreme El Nino event of 2015/2016.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Thomas L. Weiss, Braddock K. Linsley, Arnold L. Gordon
Summary: The study shows that the meridional migration of the bifurcation latitude of the Pacific North Equatorial Current (NEC) influences the strength of the Kuroshio Current in the western tropical Pacific and controls the thermocline salinity of the Sulu Sea. By analyzing isotopic and elemental data from foraminifera in sediment cores from the Sulu Sea, past changes in thermocline salinity and NEC bifurcation latitude shifts have been identified over the last 20-5 thousand years.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Oceanography
Ankitha Kannad, Nathalie F. Goodkin, Dhrubajyoti Samanta, Sujata A. Murty, Riovie D. Ramos, Jason E. Smerdon, Arnold L. Gordon
Summary: The flow of Pacific water into the Indian Ocean via the South China Sea and Maritime Continent plays a crucial role in the ocean thermohaline circulation. Climate variability, such as the East Asian monsoon and major climate modes, affects the transport and salinity of the water. The recent intensification and dominance of the Indian Ocean Dipole and El Nino Southern Oscillation may have implications for regional and global thermohaline circulation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Oceanography
Alexander J. Herron, Shannon M. Bohman, Arnold L. Gordon
Summary: This study investigates the significance of eddies in the removal of excess freshwater injected into the Bay of Bengal. The findings highlight the importance of eddies, especially in the upper 50 meters, in removing most of the river runoff.
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2022)
Article
Geosciences, Multidisciplinary
Thomas L. Weiss, Braddock K. Linsley, Arnold L. Gordon, Yair Rosenthal, Stefanie Dannenmann-Di Palma
Summary: This study estimates the relative changes of the South China Sea surface flow through the Sulu Sea over the past 140,000 years using foraminifera chemistry. The results constrain the global mean sea level during the intermediate interglacial Marine Isotope Stage 3 (MIS 3) and confirm the role of the Sunda Shelf as a land-bridge during this period for human and megafauna migration.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geochemistry & Geophysics
Shannon M. Bohman, Arnold L. Gordon
Summary: This study combines Argo temperature and salinity profiles with satellite altimetry and reanalysis data to investigate seasonal variations in the Bay of Bengal. The results show that regions with high sea level anomaly have more pronounced seasonal changes and a greater heat loss compared to regions with low sea level anomaly.
DYNAMICS OF ATMOSPHERES AND OCEANS
(2022)
Article
Oceanography
F. M. Bingham, S. K. Brodnitz, A. L. Gordon
Summary: The sea surface salinity (SSS) maximum of the South Indian Ocean (the SISSS-max) is a high-salinity feature centered at 30°S, 90°E, near the center of the South Indian subtropical gyre. It moves seasonally and interannually, with changes in size and maximum SSS, influenced by variations in evaporation, precipitation, wind forcing, gyre-scale ocean circulation, and downward Ekman pumping. The motion of SISSS-max correlates with SSS changes throughout the South Indian Ocean and may indicate changes in the basin's subtropical circulation.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Oceanography
Laura K. Gruenburg, Arnold L. Gordon, Andreas M. Thurnherr
Summary: The Indonesian Throughflow (ITF) waters move along different pathways in the Indian Ocean. The heat content anomaly (HCa) in the ITF box showed a large increase in 2011, which was not observed in the SEC box but evident in the LC box. The strength of the SEC and LC played a role in transmitting the HCa signal to different parts of the Indian Ocean.
JOURNAL OF PHYSICAL OCEANOGRAPHY
(2023)
Correction
Multidisciplinary Sciences
Melissa M. Bowen, Denise Fernandez, Arnold L. Gordon, Bruce Huber, Pasquale Castagno, Pierpaolo Falco, Giorgio Budillon, Kathryn L. Gunn, Aitana Forcen-Vazquez
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Mingting Li, Ziyang Cao, Arnold L. Gordon, Fei Zheng, Dongxiao Wang
Summary: This study reveals the role of tropical Indo-Pacific oceanic interactions in driving the first triple-dip La Nina event of the twenty-first century. The subsurface warming anomalies in the eastern Indian Ocean were associated with the re-intensification of the subsequent La Nina event. These anomalies were propagated eastward by equatorial and coastal subsurface Kelvin waves and contributed to the accumulation of heat content in the western Pacific Ocean. The westward Indonesian Throughflow transported more heat during multi-year La Nina events, resulting in the injection of warm water into the eastern Indian Ocean and prolonging the heat content in the western Pacific during the decay phase of La Nina.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Melissa M. Bowen, Denise Fernandez, Arnold L. Gordon, Bruce Huber, Pasquale Castagno, Pierpaolo Falco, Giorgio Budillon, Kathryn L. Gunn, Aitana Forcen-Vazquez
Summary: Antarctic Bottom Water (AABW) stores heat and gases over decades to centuries and shows changes in water properties and volume. The density and speed of the outflow are controlled by the density in Terra Nova Bay and tidal mixing. Tides create peaks in density and flow each year and can explain much of the decadal variability in the outflow.
SCIENTIFIC REPORTS
(2023)
Article
Meteorology & Atmospheric Sciences
Shanice T. T. Bailey, C. Spencer Jones, Ryan P. P. Abernathey, Arnold L. L. Gordon, Xiaojun Yuan
Summary: This study investigates the variability of water mass transformation within the Weddell Gyre, which plays a crucial role in the Meridional Overturning Circulation and ocean ventilation. Recent data suggest substantial variability in Antarctic Bottom Water properties exiting the Weddell Gyre, but the thermodynamic mechanisms linking surface forcings to water mass transformations and AABW export remain unclear. This study examines current ocean reanalyses to fill the gaps in our understanding of the drivers of AABW variability.
Article
Marine & Freshwater Biology
Edmo J. D. Campos, Arnold L. Gordon, Georgenes Cavalcante, Bjon Kjerfve, Mohamed Abouleish
Summary: Warm saline water masses from the Persian Gulf and the Red Sea have a significant impact on the upper layers of the northern Indian Ocean, affecting thermocline stratification, circulation, and air-sea exchanges. By simulating the closure of the Red Sea and Persian Gulf, it is found that there are marked differences in the seasonal variability and air-sea fluxes in the Arabian Sea and Bay of Bengal. The experiments suggest that the upwelling in the southwestern Bay of Bengal would have responded differently to the El Nino-La Nina event in the absence of the Persian Gulf and Red Sea input.
OCEAN AND COASTAL RESEARCH
(2022)
