Specific advances include new analyses of global data on hurricane intensity, and several important studies of data quality issues in Atlantic tropical cyclone records, which strongly affect conclusions about climate change detection. Moreover, important progress has been made in higher resolution global modelling that provides improved simulations of global storm frequencies and further support for theoretical expectations for a globally averaged increase in tropical cyclone intensity and rainfall. Finally, dynamical and statistical/dynamical downscaling tools for tropical cyclone activity have improved, and evaluations of these tools have become more convincing.