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Current Research

Summaries, photographs, and abstracts about the current projects of our researchers. Our researchers are currently doing work in many exciting fields. In addition to the summaries, photographs, and abstracts listed here, relevant information can also be found in Publications, Research focus, and other Projects

Dynamical Seasonal forecast and projection of trends of Typhoon Activity under the background of Global Warming
Improved Understanding of tropical cylone activity over the Western North Pacific
Researchers: Liguang Wu,Haikun Zha, Chao Wang, and Ruifang Wang

We introduce a dynamical-downscaling methodology for (1) understanding the possible physical mechansim on tropical cyclone activity over the WNP basin and climate change on the interannual and inter-decadal/decadal time scales; (2) analysing the reliablity of tropical cyclone intensity data from current three best track datasets (i.e., JTWC, CMA_STI, RSMC);(3) Season Forecast of TC season activity over the WNP basin Read More...

 

 

ABRUPT CHANGES OF TROPICAL CYCLONES DURING LANDFALL
Study of Mechanisms of Abrupt Changes of Tropical Cyclone Tracks during Landfall


Researchers: Liguang Wu, Jia Liang et al.


We focus on the interaction between tropical cyclones and monsoon circulations, multi-typhoon interaction, the influence of the mid-latitude convective systems, and the interaction between tropical cyclones and oceans. We introduce climatic characteristics of tropical cyclone abrupt tracks and develop the definition and classification of the tropical cyclone abrupt track. We show characteristics of multi-time scale circulation associated with the abrupt tracks, especially monsoon gyres, and reveal the important influence of monsoon gyres on tropical cyclone sudden track changes and three types of tropical cyclone tracks associated with monsoon gyres. We find that the mesoscale systems in the outer of tropical cyclones during the movement of tropical cyclones can lead to the abrupt track changes, and errors in the operational forecast. We find that the tropical cyclone track can be influenced by the interaction of 3-D vorticity tubes of multiple tropical cyclones through the transportation of energy and humidity by 3-D vorticity tube activities. We also find that the tiny changes of tropical cyclone intensity or the relative positon to the upstream trough can cause changes of the downstream circulation in the middle latitude, which can change the steering flow after tropical cyclone turning and further lead to the significant track Read More...

 

 

TC SIZE AND HIGHT-RESOLUTION TECHNIQUES
TC Size and TC structure
Researchers:Liguang WU,Qingyuan Liu et al.

We develop efficient deconvolution and super-resolution methodologies and apply these techniques to reduce image blurring and distortion inherent in an aperture synthesis system. Such a system produces ringing at sharp edges and other transitions in the observed field. The conventional approach to suppressing sidelobes is to apply linear apodization, which has the undesirable side effect of degrading spatial resolution.