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Impact of increased atmospheric moisture on the precipitation depth caused by Hurricane Ivan (2004) over a target area.

08:00 EDT 1st April 2019 | BioPortfolio

Summary of "Impact of increased atmospheric moisture on the precipitation depth caused by Hurricane Ivan (2004) over a target area."

In this article, numerical experiments are performed to investigate the effects of increasing atmospheric moisture on the precipitation depth (PD) produced by Hurricane Ivan (2004) over a target area, chosen as the drainage basin of the city of Asheville, NC. Atmospheric moisture was increased indirectly by increasing the sea surface temperature (SST) in the simulation initial conditions, and by letting the regional atmospheric model adjust the atmospheric fields to the SST perturbation. The SST was increased in two ways: 1) using spatially constant increments and 2) using a climate change perturbation field obtained from a climate projection. For each SST scenario, the PD over the target area was maximized by using a physically based storm transposition method. Although the mean PD, that was obtained by averaging over all shifting increments, increased with SST, the maximum PD was obtained for the case of no SST increase. It was found that, in the case of no SST increase, the worst-case tropical cyclone track was significantly different than in the SST increase scenarios. In particular, in this case, the storm spent a longer time in the simulation inner domain, thus spawning a larger PD over the target area.

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This article was published in the following journal.

Name: The Science of the total environment
ISSN: 1879-1026
Pages: 916-926

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