Tropical cyclones in two atmospheric (re)analyses and their response in two oceanic reanalyses
Résumé
In this paper, we first evaluate the ability of the European Centre for Medium Range Forecast operational analysis and the ERA-Interim reanalysis to capture the surface wind signature of tropical cyclones (TCs). In those products, the error on the TC position is typically ˜150 km, cyclones are too big (˜250 km in ERA-Interim and > 100 km in the operational analysis against ˜50 km in observations) and the maximum wind speed is on average underestimated by 15-27 m * s-1 for strong TCs. These biases are generally reduced with the increase of horizontal resolution in the operational analysis, but remain significant at T1279 (˜16 km).