A New Vortex Initialization Scheme Coupled with WRF-ARW
Joint Authors
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-01-03
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
The ability of numerical simulations to predict typhoons has been improved in recent decades.
Although the track prediction is satisfactory, the intensity prediction is still far from adequate.
Vortex initialization is an efficient method to improve the estimations of the initial conditions for typhoon forecasting.
In this paper, a new vortex initialization scheme is developed and evaluated.
The scheme requires only observational data of the radius of maximum wind and the max wind speed in addition to the global analysis data.
This scheme can also satisfy the vortex boundary conditions, which means that the vortex is continuously merged into the background environment.
The scheme has a low computational cost and has the flexibility to adjust the vortex structure.
It was evaluated with 3 metrics: track, center sea-level pressure (CSLP), and maximum surface wind speed (MWSP).
Simulations were conducted using the WRF-ARW numerical weather prediction model.
Super and severe typhoon cases with insufficiently strong initial MWSP were simulated without and with the vortex initialization scheme.
The simulation results were compared with the 6-hourly observational data from Hong Kong Observatory (HKO).
The vortex initialization scheme improved the intensity (CSLP and MWSP) prediction results.
The scheme was also compared with other initialization methods and schemes.
American Psychological Association (APA)
Fung, Jimmy C. H.& Gao, Guangze. 2017. A New Vortex Initialization Scheme Coupled with WRF-ARW. Advances in Meteorology،Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1122799
Modern Language Association (MLA)
Fung, Jimmy C. H.& Gao, Guangze. A New Vortex Initialization Scheme Coupled with WRF-ARW. Advances in Meteorology No. 2017 (2017), pp.1-15.
https://search.emarefa.net/detail/BIM-1122799
American Medical Association (AMA)
Fung, Jimmy C. H.& Gao, Guangze. A New Vortex Initialization Scheme Coupled with WRF-ARW. Advances in Meteorology. 2017. Vol. 2017, no. 2017, pp.1-15.
https://search.emarefa.net/detail/BIM-1122799
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122799