nerc.ac.uk

Long memory impact of ocean mesoscale temperature anomalies on tropical cyclone size

Bruneau, N.; Wang, S.; Toumi, R.. 2020 Long memory impact of ocean mesoscale temperature anomalies on tropical cyclone size. Geophysical Research Letters, 47 (6). https://doi.org/10.1029/2019GL086165

Before downloading, please read NORA policies.
[img]
Preview
Text
2019GL086165.pdf - Published Version
Available under License Creative Commons Attribution Non-commercial 4.0.

Download (15MB) | Preview

Abstract/Summary

Mesoscale ocean temperature anomalies modify a tropical cyclone (TC). Through a modeling study we show that, while the maximum wind speed is rapidly restored after the TC passes a warm‐ or cold‐ (eddy size) sea surface temperature (SST) anomaly, the storm size changes are more significant and persistent. The radius of gale force winds and integrated kinetic energy (IKE) can change by more than 10% per degree and this endures several days after crossing an SST anomaly. These properties have a long memory of the impact from the ocean fluxes and depend on the integrated history of SST exposure. They are found to be directly proportional to the storm total precipitation. Accurate continuous forecast of the SST along the track may therefore be of central importance to improving predictions of size and IKE, while instantaneous local SST near the TC core is more important for the forecast of maximum wind speed.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1029/2019GL086165
ISSN: 0094-8276
Date made live: 04 May 2020 13:25 +0 (UTC)
URI: https://nora.nerc.ac.uk/id/eprint/527629

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...