i3P W 

 50 N 



130 W 



48 N 



4G N 



44 N 



42 N 



40 N 



3B N 



Cobb SeamounI 



DRIFT BOTTLE RELEASE 

 APRIL 1964 



13E W 130 W 



ISB W 



12B W 



124 W lep W 



Figure 1.— Locations of drift bottle releases and recoveries, RV 

 George B. Kelez, 20-28 April 1964. 



132 W 

 50 N 



48 N 48 N 



4B N 4G N 



44 N 44 N 



42 N 



40 N 



38 N 



Cobb Seomount 



- DRIFT BOTTLE RELEASE 

 JULY 1964 



132 W 



130 W 



12B W 126 W 



124 W 



122 W 



Figure 2. — Locations of drift bottle releases and recoveries, RV 

 George B. Kelez, 20-26 July 1964. 



of the 21 recoveries from the three seaward stations were 

 recovered along the Washington and Oregon coasts. No 

 recoveries to date have been reported from the two offshore 

 stations along this trackline. 



On 14 May 1964, a transponding telemetry buoy was 

 launched at lat. 48°00'N, long, 131°53'W (Favorite et al. 

 1965). An additional 48 drift bottles were released at this 

 site, but no recoveries have been reported. The buoy drifted 

 east-southeast (115° true direction) for 595 km (320 nautical 

 miles) at an average speed of 11 cm/s. This suggests the 

 drift bottles released offshore may have moved onshore but, 

 before coming ashore, they were carried offshore into the 

 eastern edge of the subtropical North Pacific gyre. 



JULY 1964 



There were 37 recoveries (16%) from 228 releases at the 

 19stationsoccupiedduringthe July 1964 cruise (Fig. 2, Table 

 2). They numbered less than one-half the recoveries reported 

 for the April 1964 cruise. In general, the fewer returns are 

 consistent with the expected usual July conditions of 

 northerly winds which transport surface water offshore. 

 Recoveries are probably associated with sporadic short-term 

 events in which southerly winds transport bottles that have 

 remained nearshore onto the beach. Features of surface drift 

 are very similar to those of April— a slower southeasterly 



flow at 5 to 11 cm/s (minimum) within about 185 km (IOC 

 nautical miles) of shore and no returns from offshore. 



Recoveries were made from only 4 of the 11 stations along 

 the trackline normal to the Washington coast during this 

 cruise. Of the 13 recoveries, 6 drifted from the station closest 

 to shore onto the northern Oregon coast. No recoveries to 

 date have been reported from releases at the next three 

 seaward stations, but four recoveries, ranging from southern 

 Washington to northern Oregon, have been made from the 

 fifth station from shore. From the remaining four stations on 

 this trackline, there were only three recoveries; all were from 

 south of the mouth of the Columbia River, with the recovery 

 from the most seaward station coming from northern 

 California (lat. 38°N). 



Almost twice as many recoveries were reported from the 

 trackline normal to the west coast of Vancouver Island as the 

 trackline normal to the Washington coast— 24 recoveries 

 from 96 released. Nine recoveries were released from the 

 three stations nearest Vancouver Island, five from the west 

 coast of Vancouver Island. Two of these five recoveries were 

 from northwest of the launch site, indicating some deviation 

 from the general southerly flow along the coast during this 

 time of year. The other three recoveries were made near 

 Estevan Point on Vancouver Island. The 19 other recoveries 

 were made along the coast from central Washington to 

 northern California. It appears that during this season the 



