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. [...]

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.

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

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

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

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,

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 [...]

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 [...]

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

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. [...]

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 [...]

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 [...]

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 [...]

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 [...]

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

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.

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.

The North Pacific Oscillation (NPO) is the second leading mode of winter sea level pressure anomalies over the North Pacific. It can significantly influence downstream weather

Two-years of data from an array of pressure-sensor equipped inverted echo sounders (PIESs) deployed across the Kuroshio east of Taiwan are analyzed in this study.

Wan-Hsuan Cheng and Chih-hao Hsieh A study on vertical variation of bacteria in the Kuroshio Current east of Taiwan across seasons, led by Ph.D. student Wan-Hsuan Cheng from Academia Sinica

Oceanography professor Dr. Chih-Lin Wei collaborates with a team of Canadian marine biologists to publish a large study, “Seafloor biodiversity of Canada’s three oceans: Patterns, hotspots and potential drivers,” in Diversity and Distributions, a leading journal in the field.

Pei-Chi Ho and Chih-hao Hsieh Institute of Oceanography, National Taiwan University   A study combining the observations in subtropical aquatic systems and theoretical modeling

The Eady model of baroclinic instability has served as a theoretical foundation for understanding the scale, growth rate, and structure of mid-latitude

Strong ocean current influences a marine seismic survey and forces the streamer off-course from the survey line. The sideway drift of the streamer results in that the reflection data are no longer distributed in common

Estuaries are important habitats for fishes and the understandings of habitat uses of fishes in the estuary can benefit the fishery management and species conservation. Several approaches can be used to study the habitat use of the fish. In this study, we analyze the oxygen isotope compositions (δ18Ootolith) in the [...]

The heat-flow research team of IONTU, established by Prof. Chuen-Tien Shyu, has devoted many years’ effort to develop the frontier, state of the art marine observation system for seafloor

Environmental Science and Pollution Research, in press https://doi.org/10.1007/s11356-019-06428-9 Mongolia has been a pristine environment without much pollution. Our objective is to study a section of the Tuul River to evaluate the present condition of this pristine environment. Sediment metal (Al, Fe, Mn, Cu, Zn, Pb, Ni, Cd, Hg, and Cr) [...]

The ocean is a crucial component of the global earth system, which affects the global/regional climate, weather, ecosystems, living resources and biodiversity. The ocean plays a major role in many human activities such as coastal protection, tourism, search and rescue

The underwater glider, a kind of unmanned underwater vehicle, has been used for ocean observations for more than ten years. It was not until 2015 the Ministry of Science

Fan-Sian Lin, Pei-Chi Ho & Chih-hao Hsieh Institute of Oceanography, National Taiwan University A study in the Kuroshio east of Taiwan led by master student Fan-Sian Lan, Dr. Pei-Chi Ho, Profs. Chih-hao Hsieh and Sen Jan at National Taiwan University, shows that the temporal variation of phytoplankton size spectral slops [...]