Open AccessProjected Increases in North Atlantic Tropical Cyclone Intensity from CMIP5 Models
Author(s) -
Gabriele Villarini,
Gabriel A. Vecchi
Publication year - 2013
Publication title -
journal of climate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.315
H-Index - 287
eISSN - 1520-0442
pISSN - 0894-8755
DOI - 10.1175/jcli-d-12-00441.1
Subject(s) - tropical cyclone , climatology , tropical cyclogenesis , environmental science , african easterly jet , atlantic hurricane , tropical atlantic , tropical cyclone rainfall forecasting , greenhouse gas , tropical cyclone scales , tropical wave , radiative forcing , climate model , forcing (mathematics) , climate change , cyclone (programming language) , geography , sea surface temperature , aerosol , meteorology , oceanography , geology , field programmable gate array , computer science , computer hardware
Tropical cyclones—particularly intense ones—are a hazard to life and property, so an assessment of the changes in North Atlantic tropical cyclone intensity has important socioeconomic implications. In this study, the authors focus on the seasonally integrated power dissipation index (PDI) as a metric to project changes in tropical cyclone intensity. Based on a recently developed statistical model, this study examines projections in North Atlantic PDI using output from 17 state-of-the-art global climate models and three radiative forcing scenarios. Overall, the authors find that North Atlantic PDI is projected to increase with respect to the 1986–2005 period across all scenarios. The difference between the PDI projections and those of the number of North Atlantic tropical cyclones, which are not projected to increase significantly, indicates an intensification of North Atlantic tropical cyclones in response to both greenhouse gas (GHG) increases and aerosol changes over the current century. At the end of the twenty-first century, the magnitude of these increases shows a positive dependence on projected GHG forcing. The projected intensification is significantly enhanced by non-GHG (primarily aerosol) forcing in the first half of the twenty-first century.