Search Results

You are looking at 1 - 2 of 2 items for :

  • Cold air surges x
  • All content x
Clear All
Chanh Q. Kieu and Da-Lin Zhang

), active Madden–Julian oscillations, and unstable background flows ( Molinari et al. 1997 ). Some large-scale influences on TCG—such as monsoon troughs, upper-level troughs, cold surges, elevated dust layers, and topographical effects—may be more relevant over one ocean basin than the others. Although TCG may be mostly dictated by large-scale dynamics, recent observational and modeling studies show growing evidence of the important roles of mesoscale convective vortices (MCVs) in promoting TCG. For

Full access
Chanh Q. Kieu and Da-Lin Zhang

intensification. That is, the vortex merger results in a surge of PV flux into the storm circulation that produces about a 10-hPa central pressure drop (i.e., from 18/12–36 to 19/00–48), whereas the subsequent PV supply from the ITCZ contributes significantly to the continued intensification of the storm—that is, with another 7–8 hPa drop (between 19/03–51 and 19/15–63) even after it moves over a cooler sea surface. The vorticity budget shows that the cyclonic vorticity growth from the merger occurs from the

Full access