Gabriele Villarini

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21 22 2 ABSTRACT 1 2 Tropical cyclones – particularly intense ones – are a hazard to life and property, so an 3 assessment of the changes in North Atlantic tropical cyclone intensity has important 4 socioeconomic implications. In this study we focus on the seasonally integrated Power 5 Dissipation Index (PDI) as a metric to project changes in tropical(More)
20 Twenty-first century projections of Atlantic climate change are downscaled to explore the 21 robustness of potential changes in hurricane activity. Multi-model ensembles using the 22 CMIP3/A1B (Late 21 st century) and CMIP5/RCP4.5 (Early and Late 21 st century) scenarios are 23 examined. Ten individual CMIP3 models are downscaled to assess the spread of(More)
Skillfully predicting North Atlantic hurricane activity months in advance is of potential societal significance and a useful test of our understanding of the factors controlling hurricane activity. In this paper, a statistical– dynamical hurricane forecasting system, based on a statistical hurricane model, with explicit uncertainty estimates, and built from(More)
The impact of future anthropogenic forcing on the frequency of tropical storms in the North Atlantic basin has been the subject of intensive investigation. However, whether the number of North Atlantic tropical storms will increase or decrease in a warmer climate is still heavily debated and a consensus has yet to be reached. To shed light on this issue,(More)
Tropical cyclones (TCs, which include hurricanes and typhoons) are a major climate hazard across the Northern Hemisphere, and have exhibited variability and change on year-to-year timescales. Therefore, understanding and predicting future year-to-year TC activity is central to NOAA's mission and highly relevant to society. Of particular relevance for(More)
[1] The number of North Atlantic tropical storms lasting 2 days or less exhibits a large increase starting from the middle of the 20th century, driving the increase in recorded number of tropical storms over the past century. Here we present a set of quantitative analyses to assess whether this behavior is more likely associated with climate variability/(More)
High-resolution climate models can now simulate many aspects of tropical cyclone climate, but a theory of tropical cyclone formation remains elusive. Abstract 23 24 While a quantitative climate theory of tropical cyclone formation remains elusive, 25 considerable progress has been made recently in our ability to simulate tropical cyclone 26 climatologies(More)
North Atlantic hurricanes are a major climate hazard to North America, and have exhibited variability and change on multi-year timescales. Therefore, understanding and predicting the future multi-year hurricane activity is central to NOAA's mission and highly relevant to society. We use a hybrid statistical-dynamical hurricane prediction scheme developed at(More)
20 21 22 2 Abstract. 23 The robustness of late 21 st century dynamical model projections of intense Atlantic hurricane 24 activity is examined. Multi-model ensemble climate change scenarios from CMIP3/A1B and 25 CMIP5/RCP4.5 are compared. Ten individual CMIP3 models are downscaled. Dynamical 26 downscalings are compared from a 18 km grid regional model and(More)