SEASOAR and CTD Observations During EBC Cruises W93O6A and W9308B, June to September 1993.
OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
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This report summarizes the Seasoar and CTD observations from Wecoma cruises W9306A 5 June to 12 July, 1993 and W9308B 14 August to 22 September 1993 conducted as part of the Eastern Boundary Currents Accelerated Research Initiative, under funding by the Office of Naval Research. The cruises were designed to study the spatial and temporal variability of the mesoscale eddyjet field in the eastern boundary current region off northern California. Participants on each cruise are listed in Table 1. The major cruise activities are summarized in Table 2. Each cruise consisted of two legs, and each began with a large-area survey off northern California Figures 1,2, with sampling on long 400 km zonal sections separated by 0.25 degrees of latitude. Thirteen long sections were sampled during W9306A Figure 1 and nine were sampled during W9308B Figure 2. Measurements for the large area survey were begun on the first leg of each cruise and completed on the second leg. Results from the large area surveys, as well as drifter trajectories and satellite AVHRR imagery of sea surface temperature, were then used to guide focused physical and biological sampling of mesoscale features, either with small scale Seasoar surveys Figures 3, 4 or with transects of stations using CIT casts, MOCNESS and live net tows. To provide time series estimates of local variability, a single anchor station was sampled repeatedly during a 48 hour period of W9308B, with net tows as well as CTD and ADCP. Other cruise activities included drifter deployments, transits tofrom the experimental site, and an ADCP only survey when heavy weather prevented instrument deployment or recovery.
- Physical and Dynamic Oceanography
- Electricity and Magnetism