Low frequency variability of tropical cyclone potential intensity 1. Interannual to interdecadal variability
TL;DR: In this paper, the authors estimate global trends of potential intensity from 1958 to 1996, averaged over the region where it exceeds 40 m s−1, using the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Reanalysis and the NCEP Empirical Orthogonal Function (EOF) sea surface temperature (SST) analysis.
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Abstract: [1] Recent research suggests that anthropogenic global warming would be associated with an increase in the intensity of tropical cyclones. A recent statistical analysis of observed tropical cyclone intensity shows that its variability with location and season is strongly tied to the variability of the thermodynamic potential intensity (PI) of tropical cyclones, as calculated using a theory described in an earlier work by the authors. Thus it is of interest to look for possible trends in global measures of PI, which are far more stable than those of actual storm intensity. We estimate global trends of PI from 1958 to 1996, averaged over the region where it exceeds 40 m s−1, using the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Reanalysis and the NCEP Empirical Orthogonal Function (EOF) sea surface temperature (SST) analysis. We adjust the Reanalysis temperatures for a large, spurious temperature increase that occurred around 1979. We do this by subtracting from the Reanalysis the atmospheric temperature difference between pairs of years with similar tropical SST before and after 1979. The value of the global mean PI is very large for the SST of the corresponding region in the mid-1990s. Supported by a recent study on the effects of ozone decrease on tropospheric temperatures, we suggest that the ozone decrease might be one of the factors contributing to increase of PI during the 1990s.
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Citations
Radiative and Microphysical Impacts of the Saharan Dust on Two Concurrent Tropical Cyclones: Danielle and Earl (2010)
Bowen Pan,Yuan Wang,Yun Lin,Jen‐Shan Hsieh,Michael Lavallee,Ling Zhao,Renyi Zhang +6 more
TL;DR: The radiative and microphysical effects of Saharan dust on two concurrent tropical cyclones, Danielle and Earl (2010), are investigated. The results show that the radiative effect of dust amplified the mid-level ridge in the Central Atlantic Ocean through temperature perturbation, changing the tracks of Danielle and Earl.
Seasonal Cycles of Along-Track Tropical Cyclone Maximum Intensity
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