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Tropical Cyclone Environmental Steering Product |
These wind analyses depict the environmental flow in the Atlantic basin
for selected
tropospheric layer-means. Based on previous studies (listed below), the
depth of this layer is correlated with the TC steering layer, and
generally increases with increasing TC intensity
(Fig. 1).
These
layer-mean steering fields are created by mass-weighting
mandatory-level, high-resolution wind analyses derived locally at
UW-CIMSS using a three-dimensional recursive filter technique. These
analyses are strongly influenced by high-density, multispectral
satellite-derived wind information. Data from NWP global models
provide background field information for each analysis run.
This product has applications as a tool for approximating the current and short-term environmental steering flow for tropical cyclones of varying intensities in the Atlantic basin. By selecting the intensity range for a TC of interest, plots of the best-correlated layer-mean environmental steering flow can be displayed. For more information on this subject, refer to: Velden, C.S.: The relationship between tropical cyclone motion, intensity and the vertical extent of the environmental steering layer in the Atlantic basin. 20th Conf. Hurr. and Trop Meteor., San Antonio, TX, May, 1993. And for further information: Velden, C.S., and L.M. Leslie: The relationship between tropical cyclone intensity and the depth of the environmental steering layer in the Australian region. 19th Conf. Hurr. Trop. Meteor., Miami, Fl, May, 1991. Velden, C.S., and L.M. Leslie, 1991: The basic relationship between tropical cyclone intensity and the depth of the environmental steering layer in the Australian region. Wea. and Forecasting 6, 244-253. |
