Analysis of tropical storm formation based on ensemble data assimilation and high-resolution numerical simulations of a nondeveloping disturbance

A nondeveloping tropical disturbance, identified as TCS025, was observed during three intensive observing periods during The Observing System Research and Predictability Experiment (THORPEX) Pacific Asian Regional Campaign (T-PARC)/Tropical Cyclone Structure-2008 (TCS-08) field experiment. The low-level circulation of the disturbance was relatively weak, asymmetric, and displaced a considerable distance from the midlevel circulation. An ensemble of high-resolution numerical simulations initialized from global model analyses was used to further examine TCS025. These simulations tended to unrealistically overdevelop the TCS025 disturbance. This study extends that work by examining the impact of assimilating in situ observations of TCS025 and dual-Doppler radial velocities from the airborne Electra Doppler Radar (ELDORA) using the Data Assimilation Research Testbed (DART) ensemble data assimilation system.

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Author Penny, A. B.
Hacker, Joshua P.
Harr, P. A.
Publisher UCAR/NCAR - Library
Publication Date 2016-10-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-11T19:54:50.782535
Metadata Record Identifier edu.ucar.opensky::articles:18946
Metadata Language eng; USA
Suggested Citation Penny, A. B., Hacker, Joshua P., Harr, P. A.. (2016). Analysis of tropical storm formation based on ensemble data assimilation and high-resolution numerical simulations of a nondeveloping disturbance. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d770834c. Accessed 18 August 2025.

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