Rapidly Intensifying Hurricane Guillermo (1997). Part I: Low-Wavenumber Structure and Evolution

Determining Key Model Parameters of Rapidly Intensifying Hurricane Guillermo(1997) using the Ensemble Kalman Filter

7 In this work we determine key model parameters for rapidly intensifying Hurricane Guillermo 8 (1997) using the Ensemble Kalman Filter (EnKF). The approach is to utilize the EnKF as 9 a tool to only estimate the parameter values of the model for a particular data set. The 10 assimilation is performed using dual-Doppler radar observations obtained during the period 11 of rapid intensification o...

Campylobacter and Helicobacter Guillermo I . Perez - Perez

Low ozone concentrations over Macquarie Island during 1997 Part I: trajectory analysis

Ozone concentrations have been decreasing globally for the last 20 years in part due to increasing chlorine concentrations in the stratosphere (WMO 1999). The most dramatic example of these reductions has been identified in the high latitude southern hemisphere, where ozone levels are nearly entirely depleted in the lower stratosphere during September and October each year. This phenomenon, whi...

Effects Of Cumulus Convection On Rapidly Intensifying Cyclones

Our objectives are a) To describe the detailed structure of the air flow in a mature hurricane, b) To understand the vertical force balance in the eye and the eyewall, c) To investigate the presence of supergradient flow in hurricanes and the underlying processes, d) To study the surface wind structures during landfall, e) To investigate the transformation of a cold-core continental mesovortex ...

Low-wavenumber forcing and turbulent energy dissipation

In many Direct Numerical Simulations (DNS) of turbulence researchers inject power into the fluid at large scales and then observe how it “propagates” to the small scales [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]. One such type of stirring is to take the force f(x, t) to be proportional to the projection of the velocity u(x, t) of the flow onto its lowest Fourier modes, while keeping the rate of i...