Projected changes in tropical cyclone activity under future warming scenarios using a high-resolution climate model

Julio T. Bacmeister (), Kevin A. Reed, Cecile Hannay, Peter Lawrence, Susan Bates, John E. Truesdale, Nan Rosenbloom and Michael Levy
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Julio T. Bacmeister: Climate and Global Dynamics Division, National Center for Atmospheric Research
Kevin A. Reed: Stony Brook University
Cecile Hannay: Climate and Global Dynamics Division, National Center for Atmospheric Research
Peter Lawrence: Climate and Global Dynamics Division, National Center for Atmospheric Research
Susan Bates: Climate and Global Dynamics Division, National Center for Atmospheric Research
John E. Truesdale: Climate and Global Dynamics Division, National Center for Atmospheric Research
Nan Rosenbloom: Climate and Global Dynamics Division, National Center for Atmospheric Research
Michael Levy: Climate and Global Dynamics Division, National Center for Atmospheric Research

Climatic Change, 2018, vol. 146, issue 3, No 19, 547-560

Abstract: Abstract This study examines how characteristics of tropical cyclones (TCs) that are explicitly resolved in a global atmospheric model with horizontal resolution of approximately 28 km are projected to change in a warmer climate using bias-corrected sea-surface temperatures (SSTs). The impact of mitigating from RCP8.5 to RCP4.5 is explicitly considered and is compared with uncertainties arising from SST projections. We find a reduction in overall global TC activity as climate warms. This reduction is somewhat less pronounced under RCP4.5 than under RCP8.5. By contrast, the frequency of very intense TCs is projected to increase dramatically in a warmer climate, with most of the increase concentrated in the NW Pacific basin. Extremes of storm related precipitation are also projected to become more common. Reduction in the frequency of extreme precipitation events is possible through mitigation from RCP8.5 to RCP4.5. In general more detailed basin-scale projections of future TC activity are subject to large uncertainties due to uncertainties in future SSTs. In most cases these uncertainties are larger than the effects of mitigating from RCP8.5 to RCP4.5.

Keywords: Tropical cyclones; Climate change; High-resolution (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (8)

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DOI: 10.1007/s10584-016-1750-x

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