Tracking surface cyclones with moist potential vorticity | Zendy

Zuohao Cao | Zendy; DaLin Zhang | Zendy

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Tracking surface cyclones with moist potential vorticity

Author(s) -

Zuohao Cao,

DaLin Zhang

Publication year - 2004

Publication title -

advances in atmospheric sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.187

H-Index - 66

eISSN - 1861-9533

pISSN - 0256-1530

DOI - 10.1007/bf02916379

Subject(s) - cyclogenesis , potential vorticity , cyclone (programming language) , troposphere , vorticity , context (archaeology) , positive vorticity advection , environmental science , climatology , meteorology , tropical cyclogenesis , atmospheric sciences , geology , vortex , physics , computer science , paleontology , field programmable gate array , computer hardware

Surface cyclone tracks are investigated in the context of moist potential vorticity (MPV). A prognostic equation of surface absolute vorticity is derived which provides a basis for using negative MPV (NMPV) in the troposphere as an alternative approach to track surface cyclones. An observed case study of explosive lee cyclogenesis is performed to test the eectiveness of the MPV approach. It is shown that when a surface cyclone signal is absent due to the blocking of the Rocky Mountains, the surface cyclone can be well identified by tracing the peak NMPV.

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