Hydrographic data from the OPTOMA program OPTOMA20 OPTOMA20 P 16 March 1986 OPTOMA20 Leg MI 24 March - 3 April 1986 OPTOMA20 Leg MII 7 - 15 April 1986 OPTOMA20 Leg D 25 April - 6 May 1986

Abstract

THe OPTOMA (Ocean Prediction Through Observation, Modeling, and Analysis) Program a joint NPS/Harvard program sponsored by ONR, seeks to understand the mesoscale (fronts, eddies, and jets) variability and dynamics of the California Current System and to determine the scientific limits to practical mesoscale ocean forecasting. To help carry out the aims of this project, a series of cruises has been planned in two subdomains, NOCAL and CENCAL, Three cruises were undertaken during March, April and May 1986: two (Legs Ml and Mll) on the NOAA ship Mc AUTHOR, one (Leg D) on the USNS DE STEIGUER. In addition, one P-3 overflight (Leg P) was made one week before the first cruise. Leg P, on 16 March, sampled a domain approximately 240km square centered about 280 km off the coast between Pt. Arena and Cape Mendocino, with additional transects from and to San Francisco, Leg Ml was carried out from 24 March to 3 April (Figure 8), Leg Mll from 7 to 15 April (Figure 20), and Leg D from 25 April to 6 May (Figure 32). Each cruise sampled the same domain as Leg P. On these cruises, oceanographic stations were occupied at approximately 18km along each track