The Comparison Study of Targeting Observation for Extratropical Transition of Hurricane Fabian

Abstract:

This study compares the propagation methods of the impact of targeted observations during the extratropical transition (ET) of Hurricane Fabian in three denial experiments. In sensitive experiment, the signal (forecast difference between denial experiments and control) propagates from the tropical cyclone (TC) to the midlatitude jet through the interaction between the TC and the jet itself. Thereafter, signals propagate eastward along the jet by way of Rossby wave packets. Some differences exist between random/Atlantic and sensitive experiment although many of their signal propagation characteristics are similar. The signal in random experiment is the weakest, and that in Atlantic experiment is the strongest. In Atlantic experiment, initial signals appear not only in Fabian, but also in other regions. In some cases, signals even do not appear in Fabian. Its propagation method is similar to that in sensitive and random experiment except some signals exist at ridges occasionally. From the discussion above, we conclude that targeted observations have more positive impact than random observations, but can not replace observations taken in the whole Atlantic.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 5840-5845
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.5840
• Online since: May 2012
• Authors: Hua Chen, Xue Ting Zhang
• Keywords: Extratropical Transition, Targeted Observation, Tropical Cyclone

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