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Title: Dominating Roles of Ice Sheets and Insolation in Variation of Tropical Cyclone Genesis Potential Over the North Atlantic During the Last 21,000 Years

Journal Article · · Geophysical Research Letters
DOI:https://doi.org/10.1002/2017gl075786· OSTI ID:1565633
ORCiD logo [1];  [2]
  1. Chinese Academy of Sciences (CAS), Beijing (China); Nanjing Univ. of Technology (China)
  2. China Univ. of Geosciences, Wuhan (China)

To further our knowledge on tropical cyclone (TC)'s sensitivity to various external forcings, we investigate evolution of TC genesis potential over the North Atlantic during the last 21,000 years that experienced more varied forcings than present-day using transient simulations. Abrupt large amplitude of fluctuations in genesis potential during the studied period was dominated by meltwater discharge, whereas insolation controlled the long-term trend. Increased (decreased) meltwater discharge from Northern Hemisphere ice sheets leads to detrimental (conducive) conditions for genesis via altering the Atlantic Meridional Overturning Circulation and hence three-dimensional temperature structure and Hadley circulation. This effect is larger than the orographic effect of retreated ice sheets that favors TC formation. Decreasing (increasing) insolation broadly results in more (less) favorable conditions for genesis arising from larger (smaller) local vertical temperature contrast and stronger (weaker) meridional circulation. Our research illustrates potential changes of ice sheets and insolation in affecting future long-term TC activity.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC); National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
OSTI ID:
1565633
Journal Information:
Geophysical Research Letters, Vol. 44, Issue 20; ISSN 0094-8276
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (2)

Orbitally Induced Variation of Tropical Cyclone Genesis Potential Over the Western North Pacific During the Mid‐Piacenzian Warm Period: A Modeling Perspective journal June 2019
Evolution of tropical cyclone genesis regions during the Cenozoic era journal July 2019

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