I received my Ph.D. in pyhsical oceanography from Zhejiang University and am currently working as an assistant research scientist at the Second Insititute of Oceanography, MNR. I have strong interests in exploring the effects of strong eddy mixing on the large scale circulation and mesoscale eddy material transport. I approach the problems by theory, numerical models, and observationsal data. Feel free to contact me if you have interests in my research.
Sept 2016 - June 2020
Ph.D. in Physical Oceanography Advisor: Dake Chen
Columbia University Lamont-Doherty Earth Observatory
Sept 2018 - Sept 2019
Visiting student Advisor: Ryan Abernathey
South China Sea Institute of Oceanology Chinese Academy of Sciences
Sept 2013 - June 2016
M.S. in Physical Oceanography Advisor: Shuqun Cai
Jiangsu Ocean University
Sept 2009 - June 2013
B.S. in Marine Technology
I study the physics of the ocean, trying to understand the dynamics related to mesoscale eddies and the general ocean circulation.
Ocean Circulation and Eddy Mixing
The general ocean circulation is a great conveyor for water, heat and material, plays a key role in the global climate system. The classic wind-driven circulation theories based on Sverdrup balance have been celebrated since their establishment, but now they are seriously challenged by new observational evidences and discoveries. The classic theories cannot explain many salient features of the observed general circulation, and they neglect the effects of oceanic eddies, which are the most important discovery of physical oceanography over the last half of a century. Better understanding of the effect of eddy mixing on the large scale circulation will lead to more reasonable theories to describe the general ocean circulation.
Mesoscale Eddy Identification
Eddy identification methods can be classified into two categories: Eulerian methods based on instantaneous features of the velocity field (such as SSH contours and PV contours), and Lagrangian methods based on water parcel trajectories in a finite time interval. A wealth of literature has reported some appealing results about coherent eddy transport based on Eulerian eddy boundaries, especially the surprising zonal eddy mass transport (30Sv) in Zhang et al. (2014). However, our recent works built on Lagrangian framework indicate these Eulerian methods strongly overestimate the degree of material eddy transport. A new coherent eddy dataset in progress will provide an additional option for oceanographers in studying the interaction between coherent eddies and other physical or biochemical processes in the earth system.
For a full publication list that includes my work, please see ResearchGate.
T. Liu, Y. K. Qian, X. Liu, and D. Chen. Irreversible mixing by geostrophic turbulence over the global ocean.
T. Liu and R. Abernathey. A Global Atlas of Coherent Lagrangian Eddies Derived from Satellite Altimetry.Earth System Science Data. 2022.
T. Liu, Y. He, X. Zhai, and X. Liu. Diagnostics of Coherent Eddy Transport in the South China Sea Based on Satellite Observations.Remote Sensing. 2022. 14(7), 1690.
T. Liu, H. W. Ou, X. Liu, and D. Chen. On the Role of Eddy Mixing in the Subtropical Ocean Circulation.Frontiers in Marine Science. 2022.
Y. K. Qian, S. Peng, X. Wen, and T. Liu. Quantifying Local, Instantaneous, Irreversible Mixing Using Lagrangian Particles and Tracer Contours.Journal of Physical Oceanography. 2022. 52(4), 741-757.
T. Liu, H. W. Ou, X. Liu, Y. K. Qian, and D. Chen. The Dependence of Upper Ocean Gyres on Wind and Buoyancy Forcing.Geoscience Letters. 2022. 9(1), 1-8.
X. Liu, D. P. Wang, J. Su, D. Chen, T. Lian, C. Dong and, T. Liu. On the vorticity balance over steep slopes: Kuroshio intrusions northeast of Taiwan.Journal of Physical Oceanography. 2020. 50(8), 2089-2104.
T. Liu, R. Abernathey, A. Sinha, and, D. Chen. Quantifying Eulerian eddy leakiness in an idealized model.Journal of Geophysical Research: Oceans. 2019. 124(12), 8869-8886.
T. Liu, J. Xu, Y. He, H. Lv, Y. Yao and, S. Cai. Numerical simulation of the Kuroshio intrusion into the South China Sea by a passive tracer.Acta Oceanologica Sinica. 2016. 35(9), pp. 1-12.
J. Liu, Y. He, D. Wang, T. Liu, and, S. Cai. Observed enhanced internal tides in winter near the Luzon Strait.Journal of Geophysical Research: Oceans. 2015. 120, no. 10 (2015): 6637-6652.
H. Lv, J. Xie, J. Xu, Z. Chen T. Liu, and, S. Cai. Force and torque exerted by internal solitary waves in background parabolic current on cylindrical tendon leg by numerical simulation.Ocean Engineering. 2016. 114, 250-258.
Code & Video
I use these tools to make the science.
The scientific community is becoming increasingly aware that open access to research code is an essential ingredient for scientific reproducibility and progress. My research code can be found in my online github repositories. Go to my github
Python has become my main programming weapon since I realized its powerful and efficient features.