In "Impact on Hurricane Track and Intensity Forecasts of GPS Dropwindsonde Observations from the First- Season Flights of the NOAA Gulfstream-IV Jet Aircraft" by S. D. Aberson and J. L. Franklin, appearing in the March 1999 issue of the Bulletin of the American Meteorological Society, Table 5 and Fig. 3 were in error. Corrections to the table and figure follow, along with clarifications to the conclusions of the original article: The dropwindsonde data had a mixed, rather than positive, impact on the Geophysical Fluid Dynamics Laboratory (GFDL) model intensity forecasts, and the data obtained above 400 hPa did not provide for most of the changes, as previously reported. FIG. 3. The average intensity errors relative to SHIFO R (in %) of the GFD L forecasts with all the dropwindsonde data (GFAL) , with none of the drop- windsonde data (GFNO) , and with the dropwindsonde data as if they were gathered from the P3 aircraft (GFP3) . The numbers along the bottom axis are the number of cases at each forecast time. TABLE 5 . Intensity forecast errors for the no dropwindsonde GFD L control (GFNO) , and percentage improvements of the all dropwindsonde (GFAL ) over the control and the lower- level dropwindsonde (GFP3 ) cases. Forecast No. of GFNO error Improvement Improvement time (h) cases (m s"1) GFAL vs GFNO (%) GFAL vs GFP3 (%) 12 5 9 6 8 24 5 6 -6 - 8 36 5 6 0 3 48 4 4 -2 7 -1 2 72 3 5 13 - 3 3 8 4 6 96 2 11 2 - 5 108 2 12 2 4 120 5 -2 1 -2 6 2060 Vol. 80, , No . 10,, October 1999
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Oct 1, 1999
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