Zhengguang Zhang

Zhengguang Zhang
Ocean University of China | OUC · Key Laboratory of Physical Oceanography

PhD

About

13
Publications
7,297
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610
Citations
Introduction
Zhengguang Zhang currently works at the Physical Oceanography Lab, Ocean University of China. Interested in large-scale ocean circulation, oceanic mesoscale eddies submesoscale processes.
Additional affiliations
January 2017 - present
Ocean University of China
Position
  • Professor (Associate)

Publications

Publications (13)
Article
Full-text available
Sea surface temperature anomalies (SSTAs) induced by oceanic mesoscale eddies trigger mesoscale air-sea interactions and modulate large-scale climate systems. Yet, how eddies drive SSTAs has not been firmly established; particularly, the relative importance of lateral stirring and vertical pumping remains a debated issue. This study investigates ch...
Article
Full-text available
Ocean mesoscale eddies are ubiquitous in world ocean and account for 90% oceanic kinetic energy, which dominate the upper ocean flow field. Accurately predicting the variation of ocean mesoscale eddies is the key to understand the oceanic flow field and circulation system. In this article, we propose to make an initial attempt to explore spatio-tem...
Article
Full-text available
Near the southern tip of the African continent, the Agulhas Current retroflects eastward to feed the Agulhas Return Current, giving rise to the Agulhas Retroflection (AR). The AR is dynamically unstable and radiates eddies and rings that constitute a portion of the Agulhas leakage. In this study, by analyzing 26 years (1993-2018) of updated satelli...
Article
Full-text available
Plain Language Summary Oceanic mesoscale eddies are energetic vortices with radius ranging from tens to hundreds of kilometers. Spiral band (with scales ~1–10 km and approximately days) is a common submesoscale feature of mesoscale eddies, characterized by enhanced surface chlorophyll concentrations. This submesoscale process serves as an important...
Article
A positive feedback mechanism between tropical cyclones (TCs) and climate warming can be seen by examining TC-induced energy and potential vorticity (PV) changes of oceanic geostrophic eddies. We found that substantial dissipation of eddies, with a strong bias toward dissipation of anticyclonic eddies, is directly linked to TC activity. East of Tai...
Article
Full-text available
Oceanic submesoscale ageostrophic processes have been progressively recognized as an important upwelling mechanism to close the nutrient budget and sustain the observed primary production of phytoplankton in the euphotic layer. Their relatively small spatio-temporal scales (of 1~10 km and a few days) have hindered a systematic observational quantif...
Article
The global ocean circulation is forced by large-scale fluxes at the surface and dissipated at small-scales by diffusion. To achieve a long-term equilibrium requires a dynamical route that transfers energy from large- to dissipative-scales. The submesoscale ageostrophic motions (1-50 km) have been hypothesized recently to play a critical role in thi...
Article
The global ocean circulation is forced by large-scale fluxes at the surface and dissipated at small-scales by diffusion. To achieve a long-term equilibrium requires a dynamical route that transfers energy from large- to dissipative-scales. The submesoscale ageostrophic motions (1-50 km) have been hypothesized recently to play a critical role in thi...
Article
Full-text available
Mesoscale eddies are energetically dominant and pervasive over most of the world's oceans. Among them, many are subsurface intensified with strongest signals in the ocean interior such as mode water eddies, which trap water masses with distinctive properties and carry them over long distances. With both Argo profiling floats and atmospheric reanaly...
Article
Full-text available
Horizontal convection, with a focus on the essential physics it can disclose for the oceanic overturning circulation, is studied in an annular gap where differential heating is applied along the bottom. Based on the three-dimensional distribution of both velocity and temperature fields, we propose that in addition to differential buoyancy forcing a...
Article
Full-text available
Oceanic transports of heat, salt, fresh water, dissolved CO2, and other tracers regulate global climate change and the distribution of natural marine resources. The time-mean ocean circulation transports fluid as a conveyor belt, but fluid parcels can also be trapped and transported discretely by migrating mesoscale eddies. By combining available s...
Article
Full-text available
[1] Mesoscale eddies dominate oceanic kinetic energy at sub-inertial frequencies. Their three-dimensional structure has, however, remained obscure, hindering better understanding of eddy dynamics. Here by applying the composite analysis of satellite altimetry and Argo float data to the globe, we show that despite remarkable regional differences in...
Article
Full-text available
The Luzon Strait is the main impact pathway of the Kuroshio on the circulation in South China Sea (SCS). Based on the analysis of the 1997–2007 altimeter data and 2005–2006 output data from a high resolution global HYCOM model, the total Luzon Strait Transport (LST) has remarkable subseasonal oscillations with a typical period of 90 to 120 days, an...

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Project (1)
Project
reveal the basic spatial and temporal characteristic of the submesoscale fine structure of mesoscale eddies