Paper 15 



assumed to have detached from the Gulf Stream as an eddy on 

 17 October. These interpolations are accurate to within a week 

 or less. Bisagni used the dates an eddy was first sighted and 

 last sighted as his formation and destruction dates/ making his 

 estimates of eddy lifetimes a little shorter (on the order of a 

 week) than would be obtained by our method. Infrared imagery 

 from the Geostationary Orbiting Environmental Satellites at 3-h 

 intervals/^ which Bisagni did not have available^ was very useful 

 for establishing such dates. 



Only eddies that were observed west of 60w are considered in this 

 report. These are labeled by the year in which they formed plus 

 a sequentially assigned letter. The dates of their formation and 

 destruction/ and the number of days they survived/ are summarized 

 in Table 13.1. 



Table 1 5 .1 . --Summa ry of estimated eddy formation 

 and destruction dates and days of survival. 



Eydi: 



Dates 



Total eddy-days in 1976 



>892 



Date first observed 

 Subject to revision. 

 May have survived into 

 Totals by quarter: 



J an- Ma r 



Ap r- J un 



J u l-Sep 



Oct-Dec 



(See also Bisagni 



(see text footnote 2) 



August 



199 

 236 

 2 08 

 249 

 1978). 



261 



