A5056605272- Oceanographic and Atmospheric Processes
- Climate variability and models
- Marine and coastal ecosystems
- Ocean Waves and Remote Sensing
- Geological and Geophysical Studies
- Arctic and Antarctic ice dynamics
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
- Methane Hydrates and Related Phenomena
- Coastal wetland ecosystem dynamics
- Coastal and Marine Dynamics
- Fluid Dynamics and Turbulent Flows
- Cryospheric studies and observations
- Global Energy and Sustainability Research
- Marine and fisheries research
- demographic modeling and climate adaptation
- 3D Modeling in Geospatial Applications
Nanjing University of Information Science and Technology
2017-2025
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2020-2024
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2019-2024
Second Institute of Oceanography
2022
Ministry of Natural Resources
2022
Brown University
2020
Jet Propulsion Laboratory
2020
Ocean University of China
2015
Abstract Submesoscale processes in the upper ocean vary seasonally, tight correspondence with mixed layer thickness variability. Based on a global high‐resolution MITgcm simulation, seasonal evaluation of strong vorticity and spectral analysis kinetic energy Kuroshio Extension System show strongest submesoscales occur March, implying lag about month behind maximum February. An sources transfers indicates that seasonality submesoscale content is result competition between conversion available...
Oceanic mesoscale eddies with typical sizes of 30-200 km contain more than half the kinetic energy ocean. With an average lifespan several months, they are major contributors to transport heat, nutrients, plankton, dissolved oxygen and carbon in Mesoscale have been observed studied over past 50 years, nonetheless our understanding details their structure remains incomplete due lack systematic high-resolution measurements. To bridge this gap, a survey anticyclone was conducted early 2014...
Abstract Direct microstructure observations across three warm mesoscale eddies were conducted in the northern South China Sea during field experiments July 2007, December 2013, and January 2014, respectively, along with finestructure measurements. An important finding was that turbulent mixing mixed layer considerably elevated periphery of each these eddies, a level 5–7 times higher than eddy center. To explore mechanism behind high level, this study carried out analyses horizontal...
Abstract The spatial scale of submesoscales is an important parameter for studies submesoscale dynamics and multiscale interactions. horizontal scales baroclinic, geostrophic-branch mixed layer instabilities (MLI) are investigated globally (without the equatorial or Arctic oceans) based on observations simulations in surface bottom layers away from significant topography. Three high-vertical-resolution boundary schemes driven with profiles a MITgcm global submesoscale-permitting model...
Abstract Symmetric instability (SI) extracts kinetic energy from fronts in the surface mixed layer (SML), potentially affecting SML structure and dynamics. Here, a global submesoscale-permitting ocean model named MITgcm LLC4320 simulation is used to examine Stone linear prediction of maximum SI scale estimate grid spacings needed begin resolving SI. Furthermore, potential effects on usable wind work are estimated roughly: this “activity” useful for assessing if these modes should be resolved...
Abstract As one kind of submesoscale instability, symmetric instability (SI) the ocean surface mixed layer (SML) plays a significant role in modulating SML energetics and material transport. The small spatial scales SI, O (10 m–1 km), are not resolved by current climate models most regional models. This study describes comparisons an idealized configuration SI parameterization scheme proposed Bachman et al. (2017, https://doi.org/10.1016/j.ocemod.2016.12.003 ) (SI‐parameterized) versus...
Abstract Current submesoscale restratification parameterizations, which help set mixed layer depth in global climate models, depend on a simplistic scaling of frontal width shown to be unreliable several circumstances. Observations and theory indicate that frontogenesis is common, but stable widths arise the presence turbulence instabilities participate keeping fronts at scale observed, arrested scale. Here we propose new law for as function turbulent fluxes via thermal wind (TTW) balance. A...
Abstract Growing evidence has confirmed the critical role played by basal channels beneath Antarctic ice shelves in both shelf stability and freshwater input to surrounding ocean. Here we show, using a 3D shelf-ocean boundary current model, that deeper can lead significant amplification channelized melting, meltwater channeling, warming salinization of channel flow. All these quantities are also modulated width, with level modulation determined height. The explicit quantification melting...
Abstract Clarifying contributions to the surface mixed layer (SML) dissipation from dynamic processes including winds, waves, buoyancy forcing and submesoscales is of significance for quantifying exchanges between atmosphere ocean. Based on two observation sections across an anticyclonic eddy in South China Sea, different SML rate turbulence are quantified. The potential vorticity indicates instability events symmetric (SI), gravitational centrifugal at eddy. Despite a dominant role wind‐...
Abstract High‐resolution sea surface velocity (SSV) is crucial for advancing our understanding of ocean sub‐mesoscale processes, energy cascades, etc. The recently launched Surface Water and Ocean Topography (SWOT) satellite measures height with a resolved resolution. Based on geostrophic balance, the so‐called in SWOT estimated. Although SWOT‐derived not true as it does consider separation balanced unbalanced motions, offers valuable insights into both ageostrophic velocities. Here we...
Abstract The North Pacific subtropical mode water (NPSTMW) is a vertically homogeneous mass located between the seasonal and permanent thermoclines in northwestern Ocean. It plays critical role oceanic heat carbon storage, significant for understanding climate change. However, coarse-resolution models tend to overestimate NPSTMW formation compared observations. In this study, we show that observed well reproduced by 1/30° submesoscale-permitting Ocean General Circulation Model. Our findings...
The turbulent ocean surface boundary layer is a key part of the climate system affecting both energy and carbon cycles. Accurately simulating critical in improving model performance, which deeply relies on our understanding turbulence layer. Turbulent sources are traditionally believed to be dominated by waves, winds convection. Recently, submesoscale phenomena with spatial scales 0.1~10 km at fronts have been shown also make contribution. Here, applying non-dimensional kinetic budget...
From the analysis of oceanic eddies detected in drifter trajectories Global Drifter Program (GDP) data set, it was found that are asymmetrically distributed across Kuroshio East China Sea: predominant cyclonic (anticyclonic) on western (eastern) sides Kuroshio. This distribution is confirmed by high-resolution numerical modeling output as well. Most these 5~20 km radius, less than local first baroclinic deformation thus categorized submesoscale. The generation mechanism submesoscale...
Abstract Spatial‐temporal submesoscale variabilities in the upper Red Sea and their generation mechanisms, including frontogenesis, mixed‐layer instability (MLI), symmetric (SI) are qualitatively investigated using high‐resolution simulations. The results suggest that submesoscales critical hydrodynamic components stirring at has a clear signal Sea, enhanced winter, particularly central northern basins, intensified toward eastern coast. Frontogenesis MLI energize with winter peaks, when SI...
Abstract Vertical mixing is a key issue in ocean circulation modeling today. Mixing, particularly tidal mixing, poorly represented and climate models, which generally ignore critical latitude effects. Critical the where inertial frequency equals differs for each constituent. latitudes strongly influence generation propagation of internal tides. Using model, effects on interactions with seamount were examined by varying from 20° to 38°, through range diurnal latitudes. The found tides,...
Abstract Critical latitudes are a significant area of tidal dissipation. Generally, critical taken to be the exact latitude where frequency equals inertial frequency. However, key is really combination planetary vorticity and relative from background currents. Although influence currents on effects nonlinear interactions have been noted for many years, their impacts not well known. The dependence tides, internal waves in presence was investigated using Regional Ocean Modeling System by...
Abstract Sea surface currents (SSC) derived from the sea height anomalies (SSHA) as measured by multi‐satellite altimeters are widely used for various applications including studies on ocean dynamics, marine ecology, and climate change. However, present SSC products estimated assumption of an idealized geostrophic balance is biased. To overcome this idealization, study considers flow curvature in estimation velocities global ocean, with computation scheme validated using numerical model...
Mesoscale eddies are ubiquitous in the ocean, yet our understanding of their evolutions, particularly eddy merging processes, remains enigmatic. In this study, processes two cyclonic–cyclonic and anticyclonic–anticyclonic analyzed Subtropical Northwest Pacific using satellite remote sensing altimetry data. The results reveal that, as approach each other, contours become connected, leading to formation multi-core eddies. Simultaneously, process prompts substantial exchanges energy vorticity,...
Abstract As one kind of submesoscale instabilities, symmetric instability (SI) with spatiotemporal scales O (100) m– (1) km and hour exerts significant effects on vertical material transports forward energy cascade in the ocean. The potential vorticity (PV) is an important conservative parameter controlling quasi‐geostrophic flows, whose budget can be modulated by SI. However, due to small spatial scale SI which hardly resolved most current observations regional models, how affects PV big...