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Competitive Homing Assays to Study Gut-tropic T Cell Migration
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Recent increases in tropical cyclone intensification rates.

Kieran T Bhatia1,2, Gabriel A Vecchi3,4, Thomas R Knutson5

  • 1NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, 08540, USA. kbhatia@princeton.edu.

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Tropical cyclone intensification rates are increasing, especially in the Atlantic basin. This trend, linked to human activity, is more significant than natural climate variations suggest.

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Area of Science:

  • Atmospheric science
  • Climate science
  • Meteorology

Background:

  • Rapidly intensifying tropical cyclones pose significant forecast challenges and cause substantial human and financial losses.
  • Understanding trends in tropical cyclone intensification is crucial for improving predictions and mitigating impacts.

Purpose of the Study:

  • To investigate observed trends in tropical cyclone intensification rates.
  • To compare these observed trends with natural climate variability using climate models.
  • To determine the potential influence of anthropogenic forcing on intensification rates.

Main Methods:

  • Utilized two observational datasets to calculate 24-hour tropical cyclone wind speed changes from 1982 to 2009.
  • Employed bias-corrected, high-resolution global coupled model experiments to simulate natural climate variability.
  • Compared observed intensification trends against model-based estimates of internal climate variations.

Main Results:

  • Both observational datasets revealed significant increases in tropical cyclone intensification rates within the Atlantic basin.
  • These observed Atlantic trends were found to be highly unusual when compared to model simulations of natural climate variability.
  • A detectable increase in Atlantic intensification rates was identified, with a positive contribution attributed to anthropogenic forcing.

Conclusions:

  • Observed increases in Atlantic tropical cyclone intensification rates are likely influenced by anthropogenic factors.
  • Further improvements in data reliability are necessary to detect a robust global trend in tropical cyclone intensification.
  • The findings highlight the need for continued research into climate change impacts on extreme weather events.