A5005518093- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Ocean Waves and Remote Sensing
- Arctic and Antarctic ice dynamics
- Tropical and Extratropical Cyclones Research
- Marine and fisheries research
- Ocean Acidification Effects and Responses
- Climate variability and models
- Coastal wetland ecosystem dynamics
- Geology and Paleoclimatology Research
- Fish Ecology and Management Studies
- Market Dynamics and Volatility
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine Biology and Ecology Research
- Hydrology and Sediment Transport Processes
- Coastal and Marine Dynamics
- Solar and Space Plasma Dynamics
- Peatlands and Wetlands Ecology
- Marine Bivalve and Aquaculture Studies
- Water-Energy-Food Nexus Studies
- Species Distribution and Climate Change
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
Second Institute of Oceanography
2014-2024
Ministry of Natural Resources
2019-2024
Hypoxia off the Changjiang Estuary has been frequently reported using short time duration field data. However, its evolution was unknown because of a lack long-term data and associated dominant factor. A 104-day long dataset collected with bottom mounted system in summer 2009. The monitored parameters were dissolved oxygen (DO), temperature, pressure current. Two hypoxia events identified, showing that severe lasted for more than half month. first event appeared on July 18 17 days. During...
Abstract Sediment oxygen consumption (SOC) is important in modulating the budget East China Sea where seasonal hypoxia occurs. Porewater advection, molecular diffusion and bioturbation supply for sedimentary organic matter degradation. A pelagic‐benthic coupled model was applied to quantify SOC. comparison with observations showed good performance reproducing hydrographic ecological environments, particularly interannual variation hypoxic zone. Simulation results show that...
Abstract A monthlong, high‐resolution buoy time series from the surface ocean of Changjiang River plume in early autumn 2013 (30‐min sampling frequency) shows great variability partial pressure carbon dioxide ( p CO 2 ) and other physical biogeochemical parameters. Early deployment, decreased by ~117 μatm a single day (11–12 September, an initial value ~527 μatm); similar decline 62 occurred five days later (to ~378 μatm). Both drawdown events were associated with strong vertical...
Abstract The Changjiang Estuary is a large‐river estuary ecosystem in the East China Sea, and its plume, Diluted Water (CDW), transports large mass of nutrients ( + , ) to shelf sea, leading substantial eutrophication; CDW also supports high primary production. However, relationships between nutrient delivery phytoplankton responses have been difficult establish, as many events algal blooms are episodic, may expand or become detached with changing winds. To study relationship events,...
Temporal variation of summer hypoxia, along a repeated hydrographic section from the Changjiang River mouth to Cheju Island, is investigated using cruise data during 1997–2014. The climatological mean dissolved oxygen (DO) presents “dual-core structure” below oxycline, associated with two hypoxic centers near river and offshore Bank, respectively. DO value highly variable year year, dramatic interannual but an insignificant linear trend Composite analysis indicates that hypoxia events are...
Abstract Subsurface eddies are pervasive in the ocean, but those eastern equatorial Indian Ocean not well understood due to lack of in‐situ observations. Using multiple‐platform observations and reanalysis product, we investigate characteristics, evolutionary process, origin, underlying generation mechanism a subsurface anticyclonic eddy (SAE) during January‒February 2020. Results show that horizontal radius SAE was slightly greater than 250 km, core located at ∼100‐m depth near 24.7σ 0...
The discovery of cyclonic and dipole eddies in the Mozambique Channel (MC) indicates that understanding mesoscale eddy characteristics MC is incomplete. distributions anticyclonic, cyclonic, along were elucidated this study using satellite observations. It was observed these exhibit a preference for emergence movement western MC. occurrence frequencies anticyclonic are four three times per year, respectively, narrowest section In contrast, frequency reaches its peak at nine year central...
Abstract A high‐resolution mooring record from the Changjiang River plume (45‐m depth) is used to investigate how air‐sea CO 2 flux responds typhoon in productive plume. With strong wind, surface partial pressure of carbon dioxide ( p ) increased sharply 369 606 μatm due entrainment high‐CO subsurface water. Though it was followed by decrease 250 and Chl a increase days after typhoon, caused net efflux overall. The maximum (+111.6 mmol·m −2 ·day −1 much greater than that under non‐typhoon...
Abstract Bottom current at the equatorial gap of Ninety East Ridge is revealed by long‐term bottom mooring observations from 24 December 2019 to 2 April 2021. It found that observed has significant intraseasonal variability (ISV) with a dominant time scale ∼33 days, which becomes enhanced in boreal summer and winter. Variability was explored using Mercator Ocean outputs, enhancement ISV closely related westward propagation Rossby waves originating eastern boundary, their ray paths vertically...
The partial pressure of CO 2 ( p ) in the sea and air-sea flux plume waters are subject to interactions among biological production, horizontal advection, upwelling under wind events. In this study, time series other biogeochemical parameters dynamic Changjiang were presented illuminate controlling factors after a strong south event (July 23–24, maximum 11.2 ms –1 ). surface decreased by 310 μatm (to 184 μatm) from July 24 26. Low- (<200 observed following days. Corresponding...
The northern Andaman Sea (AS) continental shelf is unique due to the diverse marine ecosystem and existences of both hypoxia internal tides, but limited in situ observations restrict our understanding hydrographic dynamic process. Based on turbidity, mean volumes backscattering strength (MVBS), we qualitatively studied distribution characteristics temporal variation suspended matters AS their relation tides. results MVBS turbidity revealed that exhibited a three-layer vertical structure....
Dissolved oxygen (DO) is essential for the survival of most aquatic organisms. Hypoxia, defined as a DO concentration less than 2 mg L–1, significant issue ecosystems in estuaries and coastal waters one top themes United Nations Decade Ocean Science Sustainable Development (2021–2030). An area off Yangtze River Estuary (YRE), China, annually develops world ocean’s largest hypoxic areas. Observations collected by ship since 1999, long-term sensors 2009, show that this region has been both...