Objectively derived resolution-dependent criteria are defined for the detection of tropical cyclones in model simulations and observationally based analyses. These criteria are derived from the wind profiles of observed tropical cyclones, averaged at various resolutions. Both an analytical wind profile model and two-dimensional observed wind analyses are used. The results show that the threshol...

Tropical cyclone track prediction is steadily improving, while storm intensity prediction has seen little progress in the last quarter century. Important physics are not yet well understood and implemented in tropical cyclone forecast models. Missing and unresolved physics, especially at the air-sea interface, are among the factors limiting storm predictions. In a laboratory experiment and coor...

A new probabilistic clustering technique, based on a regression mixture model, is used to describe tropical cyclone trajectories in the western North Pacific. Each component of the mixture model consists of a quadratic regression curve of cyclone position against time. The best track 1950–2002 data set is described by seven distinct clusters. These clusters are then analyzed in terms of genesis...

Impact of ozone observations on the structure of a tropical cyclone using coupled atmosphere–chemistry data assimilation S. Lim, S. K. Park, and M. Zupanski Department of Atmospheric Science and Engineering, Ewha Womans University, Seoul, Republic of Korea Department of Environmental Science and Engineering, Ewha Womans University, Seoul, Republic of Korea Center for Climate/Environment Change ...

INTRODUCTION Emergency departments see an increase in cases during cyclones. The aim of this study is to describe patient presentations to the Emergency Department (ED) of a tertiary level hospital (Townsville) following a tropical cyclone (Yasi). Specific areas of focus include changes in: patient demographics (age and gender), triage categories, and classification of diseases. METHODS Data ...

The primary question to be addressed is to understand the mesoscale and microphysical differences between cloud clusters that do develop into tropical cyclones and those that do not. Because the problem is not just an issue of the differences of structure within the cloud cluster itself, but is also an issue of how the cloud cluster interacts with the surrounding large-scale environment, a two-...

Delivering accurate cyclone forecasts in time is of key importance when it comes to saving human lives and reducing economic loss. Difficulties arise because the geographical and climatological characteristics of the various cyclone formation basins are not similar, which entails that a single forecasting technique cannot yield reliable performance in all ocean basins. For this reason, global f...

A minimal 3D numerical model designed for basic studies of tropical cyclone behavior is described. The model is formulated in s coordinates on an f or b plane and has three vertical levels, one characterizing a shallow boundary layer and the other two representing the upper and lower troposphere, respectively. It has three options for treating cumulus convection on the subgrid scale and a simpl...

BACKGROUND Zhejiang Province, located in southeastern China, is frequently hit by tropical cyclones. This study quantified the associations between infectious diarrhea and the seven tropical cyclones that landed in Zhejiang from 2005-2011 to assess the impacts of the accompanying precipitation on the studied diseases. METHOD A unidirectional case-crossover study design was used to evaluate th...