Yong-Jin Huang, Chun-Wei Chang, and Chih-hao Hsieh A long-standing central challenge in natural science is to detect the change point (aka regime shift) in the dynamics of natural systems using historical data. To address this scientific problem,
Author Archive: OCAdmin
Mechanisms of spatial segregation between body size groups within fish populations under environmental change
Hsiao-Hang Tao and Chih-hao Hsieh The research team led by Dr Hsiao-Hang Tao and Professor Chih-hao Hsieh from the Institute of Oceanography, National Taiwan University developed a novel analytical framework to investigate within-population spatial dynamics, and applied this method to three ecologically and economically-important fish populations. The team analyzed how [...]
Asynchronous evolution of ocean temperatures and ice sheets across the most recent global climate transition on Earth ~3 million years ago
The surface of the Earth has been getting warmer over the last few decades due to the increasing atmospheric CO2 concentration as a result of human activities. This is accompanied by the loss of glaciers and ice sheets in polar regions, resulting in sea level rise. Just last month,
Jinny Yang & Chih-hao Hsieh Prof. Chih-hao Hsieh and former master student, Jinny Yang, from the Institute of Oceanography, NTU, using a novel experimental setting, for the first time, demonstrated the empirical evidence supporting the “kill-the-winner” hypothesis operating in marine microbes. This finding conducted using microbial communities from the [...]
Deterministic assembly processes strengthen the effects of β-diversity on community biomass of marine bacterioplankton
Fen-Hsun Chang and Chih-hao Hsieh Postdoctoral researcher, Feng-Hsun Chang and Prof. Chih-hao Hsieh from the Institute of Oceanography, NTU, proposed a novel approach to examine b-diversity effects on ecosystem functioning of metacommunities. This approach, demonstrated using microbial communities collected from the East China Sea across years, is published in [...]
Waterfalls are commonly seen in the mountainous regions of Taiwan. They are often famous attractions that attract tourists to stop by. The formation of waterfall results from the river water flowing over the highly steep riverbed or the escarpment. Are there waterfalls in the ocean interior? To answer this, [...]
Chun-Mao Tseng* Understanding the accumulation and sources of methylmercury (MeHg) in tuna species for reducing the risk of human exposure through tuna consumption is so important to human well-being and ecosystem health. Professor Tseng’s lab thus collaborated with Professor Reinfelder (Rutgers University) in the US to explore the accumulation [...]
Shou-En Tsao, Chun-Mao Tseng* Since the industrial revolution, the level of atmospheric carbon dioxide (CO2) has increased by ~50% due to human activities in the past centuries which accelerated global change and a warming threat to the earth. Meanwhile, the ocean has absorbed around 30% of the emitted anthropogenic [...]
Phosphorus (P) is an essential and growth-limiting nutrient for all living organisms and controls primary producers in marine environments. Dissolved Inorganic Phosphorus (DIP) in the surface ocean is often depleted, resulting in fast turnover times and stress responses as in genome adaptation and changes in cellular compositions for the microbes.
Due to its unique location, Taiwan is prone to extreme events linked to climate (e.g., typhoons) and tectonics (e.g., earthquakes). These extreme events can trigger submarine landslides in the form of turbidity currents.
The participation of the Taiwan Multi-scale Community Ocean Model (TIMCOM) in the Ocean Model Intercomparison Project (OMIP) experiments is introduced here, as part of phase 6 of the Coupled Model Intercomparison Project (CMIP6). Two ocean–sea ice model experiments are compared: (a) OMIP1, forced by the Coordinated Ocean-Ice Reference Experiments Phase [...]
The calcite shells of planktonic foraminifera, a type of zooplankton, are widely used to reconstruct past changes in oceanography and climate. One of the key assumptions made in such reconstructions is that the organisms have a fixed depth habitat in the water column through time, regardless of hydrographic changes. To [...]
IONTU’s Ph.D. candidate, Yuting Vicky Lin, and her advisor, Prof. Vianney Denis, published a study in the Journal of Biogeography on 16 July 2022. This study aimed to disentangle the effect of benthic habitats from the sea surface temperature on the distributions of reef fishes in a biogeographic transition zone. [...]
Congratulations to Ph.D. candidate Yuting Vicky Lin for winning the first prize at the “2022 UN Sustainable Development Goals” academic poster competition, and being the representative of our institute at the “2022 Global Partners Research Forum”
Congratulations to Ph.D. candidate Yuting Vicky Lin for winning the first prize at the “2022 United Nations Sustainable Development Goals (2022 UN SDG)” academic poster competition. With this award, she was selected to represent our university and institute at the recent online event “2022 Global Partners Research Forum” focusing on [...]
Improving the Predictability of Two Types of ENSO by the Characteristics of Extratropical Precursors
Yu-Heng Tseng El Niño-Southern Oscillation (ENSO) is the dominant interseasonal–interannual variability in the tropical Pacific and it exerts significant influence on weather and climate all over the world.
“Kuroshio paradox”－Coastal uplift supports more energy transferred to higher tropical levels in this oligotrophic Kuroshio ecosystem
Led by Professor Chung-Chi Chen at the Department of Life Science, National Taiwan Normal University and Professor Chih-hao Hsieh at the Institute of Oceanography
Je-Yuan Hsu Between the spring and summer in the Southern Hemisphere, an intra-seasonal weather system: Madden-Julian Oscillation (MJO) propagates along the
Chun-Wei Chang and Chih-hao Hsieh Postdoctoral fellow, Dr. Chun-Wei Chang, from the National Center for Theoretical Sciences and Prof. Chih-hao Hsieh from the Institute of Oceanography
Since the 2000s, Argo floats supported by several countries have been used for monitoring the vertical structure of temperature and salinity in the worldwide ocean widely and regularly.
Yunli Eric Hsieh, Nicolas Sturaro, and Vianney Denis Prof. Vianney Denis, his former postdoc Dr. Nicolas Sturaro and master student Yunli Hsieh at the Institute of Oceanography
Evaluation of the Impacts of Climate Change on Albacore Distribution in the South Pacific Ocean by Using Ensemble Forecast
Yi-Jay Chang, Jhen Hsu, Lai Po-Kai and cooperative colleagues Tuna is one of the most popular fish species in the world. Taiwanese tuna longline fisheries operate in the three oceans
Carbon and nitrogen isoscape of particulate organic matter in the euphotic zone reflect the primary production and microbial activity in the East China Sea
Pei-Chi Ho, Pei-Ling Wang The spatio-temporal variation of particulate organic matter (POM) in the euphotic zone at the shelf of the East China Sea (ECS) is affected by hydrological interactions and biological
Chun-Wei Chang and Chih-hao Hsieh Prof. Chih-hao Hsieh from the Institute of Oceanography and postdoc Dr. Chun-Wei Chang from the National Center for Theoretical Science
Profs. Chun-Mao Tseng and Jen-Chieh Shiao from the Institute of Oceanography, NTU, and the US cooperative colleagues worked together as
A joint atmosphere-ocean observation reveals upper ocean response to summertime atmospheric intraseasonal oscillations in the tropical South China Sea
The South China Sea, which serves as an important maritime route between the Indian and Pacific Oceans, is characterized as a high biodiversity region in the world ocean
Wanchien Victoria Hsiao, Yuting Vicky Lin, Huei-Ting Lin, Vianney Denis* Prof. Vianney Denis and master student Wanchien Victoria Hsiao from the Institute of Oceanography, NTU, together with Ph.D. candidate Yuting Vicky lin and Prof. Huei-Ting lin
Ruo-Yu Pan, Ting-Chun Kuo and Chih-hao Hsieh Prof. Chih-hao Hsieh and master student Ruo-Yu Pan from the Institute of Oceanography, NTU, together with Prof. Ting-Chun Kuo from the NTOU
A frontier research lead by the assistant professor Huei-Ting (Tina) Lin of the Institute of Oceanography, NTU, collaborating with distinguished chair professor Chuan-Chou (River) Shen,
Stratigraphic Framework and Sediment Wave Fields Associated with Canyon-Levee Systems in the Huatung Basin Offshore Taiwan Orogen
A research team, led by Prof. Ho-Han Hsu from the Institute of Oceanography, using newly compiled bathymetry, sub-bottom profiling and seismic data to illustrate seafloor morphology, submarine canyon networks and stratigraphic framework in Huatung Basin (HB) and an adjacent sub-basin offshore east Taiwan (Fig. 1). This work is published in [...]
Community assembly processes as a mechanistic explanation of the predator-prey diversity relationship in marine microbes
Feng-Hsun Chang and Chih-hao Hsieh Postdoctoral researcher, Feng-Hsun Chang and Prof. Chih-hao Hsieh from the Institute of Oceanography, NTU, proposed a novel approach to examine how the predator and prey communities are assembled in order to understand how predator and prey diversity are often positively associated. This approach, using [...]
Precipitation and Patagonian ice sheet drive past marine productivity of the southern Humboldt Current
The Humboldt Current System is the world’s most productive eastern boundary upwelling system. It stretches along the long coast off Chile. Thanks to the abundant nutrients here, this region is characterized by high marine productivity
Prof. Yu-heng Tseng at the Institute of Oceanography receives 2020 Outstanding Research Award, Ministry of Science and Technology. Prof. Yu-heng Tseng proposes a new Pacific variability framework based on a series of works progressed in the last few years.
The variation of Kuroshio loop in the Luzon Strait is important for the momentum, heat, and salt budgets of the SCS basin. Regarding the ENSO effects on the Kuroshio in the Luzon Strait, previous studies primarily focused on the effects of basin-scale wind anomalies and remote effects from the tropics. [...]
Impacts of Saharan Mineral Dust on Air-Sea Interaction over North Atlantic Ocean Using a Fully Coupled Regional Model
The atmosphere and oceans act as a coupled system. They interact in various ways, including via ocean-sur-face wind stresses, downward radiation fluxes, and exchanges of surface heat/energy. Professor Yu-heng Tseng and his collaborators investigate how the common Sahara dust can change the atmosphere and ocean dynamical processes using a high-resolution [...]
Long-term warming destabilizes aquatic ecosystems through weakening biodiversity-mediated causal networks
Chun-Wei Chang and Chih-hao Hsieh Prof. Chih-hao Hsieh from the Institute of Oceanography, NTU and postdoc Dr. Chun-Wei Chang from the National Center for Theoretical Science lead an international team to reveal how warming influenced ecosystem dynamics via weakening the system-level causal networks associated with biodiversity.
Dr. Sze Ling Ho from IONTU co-led a study involving an international team of scientists, including marine geologists (PlioVAR; https://pliovar.github.io/index.html) and paleoclimate
Hui-Yu Wang, Sheng-Feng Shen, Ying-Shiuan Chen, Yun-Kae Kiang, and Mikko Heino Dr. Hui-Yu Wang (IO NTU), Dr. Sheng-Feng Shen (AS BRC), and Dr. Mikko Heino (UiB) conduct the first assessment of warming-induced effects on various types marine fishes in the Indo-Pacific. Their findings reveal that warming impacts are not [...]
Temporal variations of submarine groundwater discharge into a tide-dominated coastal wetland (Gaomei Wetland, Western Taiwan) indicated by radon and radium Isotopes
Although not as obvious as surface runoffs, groundwater flowing across the seabed into the ocean, so-called Submarine Groundwater Discharge (SGD), indeed occurs in many coastal areas. SGD, comprising of terrestrial fresh groundwater flowing from the aquifers and seawater infiltrating through the permeable sediments, is regarded as a significant process of [...]
Impact of ENSO on the South China Sea during ENSO decaying periods (a new mesoscale perspective from the regional coupled model)
The South China Sea (SCS) is the largest marginal sea in the western North Pacific. Its surface thermal conditions greatly affect the weather and climate conditions in the sea and its adjacent landmass. Previous studies have suggested that the ocean dynamics in the SCS play a crucial role in local [...]
Folds and thrust faults developed in accretionary wedge off southwestern Taiwan may provide conduits for fluid migration from deep strata to seafloor as there are many seafloor seepage features formed in this area. High-resolution bathymetric data and backscatter images collected using an autonomous underwater vehicle (AUV) over three accretionary ridges [...]
Gaoping Submarine Canyon (GPSC) off southwestern Taiwan connecting to the Gaoping River receives extremely high sediment load, heavy seasonal precipitation, and high tectonic activity in the region. Moreover, the internal tide within the GPSC induces strong bottom currents resulting in sediment erosion and resuspension. To understand the effects of extreme [...]
Phytoplankton nutritional content, rather than primary production, critically limits marine zooplankton production
Pei-Chi Ho and Chih-hao Hsieh A study combining ecological stoichiometry and in situ zooplankton incubation experiments, led by Dr. Pei-Chi Ho and Prof. Chih-hao Hsieh in the IONTU
To disentangle anthropogenic from natural climate variability, it is essential to reconstruct past oceanic and atmospheric temperatures for comparison with the modern world.
The 2nd KU-NTU Colloquium is dedicated to promote academic collaboration for researchers between the KU and NTU. In the colloquium on June 15 2020, the Institute of Oceanography (IO) hosted two parallel sessions on oceanography sciences: physical oceanography and marine ecology. The theme for physical oceanography was “responses of shelf [...]
How can patterns in the marine biodiversity of the past help us to understand how it may change in the future? A recent research by Drs Moriaki Yasuhara
Truncated age structure and warming temperature drive marine fishes into uneven spatial distribution, weakening their sustainability
Jheng-Yu Wang, Ting-Chun Kuo, and Chih-hao Hsieh Prof. Chih-hao Hsieh and his master student Jheng-Yu Wang from NTU Institute of Oceanography together with Prof. Ting-Chun Kuo from NTOU found that fishing-induced age
Topographic effects on flow often induce submesoscale and small‐scale processes (e.g., wake flow and barotropic instability) which may grow into submesoscale eddies.
Spatiotemporal Variations in Dissolved Elemental Mercury in the River-Dominated and Monsoon-Influenced East China Sea: Drivers, Budgets, and Implications.
Mercury (Hg) is a neurotoxic element that features a complex biogeochemical cycling. In particular, the in-situ produced dissolved elemental mercury in surface seawater
During June 2017 and April 2018, an array of 100-Hz sampling-rate geophysical broadband Ocean Bottom Seismometers (OBSs) and an oceanographic 0.5-Hz sampling-rate vertical
El Niño-Southern Oscillation (ENSO) is the dominant interseasonal–interannual variability in the tropical Pacific and it exerts significant influence on weather and climate all over the world.