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Moisture control of tropical cyclones in high-resolution simulations of paleoclimate and future climate

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Title
Moisture control of tropical cyclones in high-resolution simulations of paleoclimate and future climate
Author(s)
Pavan Harika Raavi; Jung-Eun Chu; Axel Timmermann; Sun-Seon Lee; Walsh, Kevin J. E.
Publication Date
2023-10
Journal
Nature Communications, v.14, no.1
Publisher
Nature Publishing Group
Abstract
The intensity of tropical cyclones (TCs) is expected to increase in response to greenhouse warming. However, how future climate change will affect TC frequencies and tracks is still under debate. Here, to further elucidate the underlying sensitivities and mechanisms, we study TCs response to different past and future climate forcings. Using a high-resolution TC-resolving global Earth system model with 1/4° atmosphere and 1/10° ocean resolution, we conducted a series of paleo-time-slice and future greenhouse warming simulations targeting the last interglacial (Marine Isotope Stage (MIS) 5e, 125 ka), glacial sub-stage MIS5d (115 ka), present-day (PD), and CO2 doubling (2×CO2) conditions. Our analysis reveals that precessional forcing created an interhemispheric difference in simulated TC densities, whereas future CO2 forcing impacts both hemispheres in the same direction. In both cases, we find that TC genesis frequency, density, and intensity are primarily controlled by changes in tropospheric thermal and moisture structure, exhibiting a clear reduction in TC genesis density in warmer hemispheres. © 2023, Springer Nature Limited.
URI
https://pr.ibs.re.kr/handle/8788114/14108
DOI
10.1038/s41467-023-42033-8
ISSN
2041-1723
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > 1. Journal Papers (저널논문)
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