Temperature

Ocean temperature data loggers are deployed at depths of 1 m (2 instruments attached to the subsurface portion of the buoy) and at 40, 50, 60, 80, 90, 100, 110, 120, 130 and 150 m (1 instrument per depth).

Description: The Richard Brancker Research (RBR) XX-105 is a single channel data logger with a built-in, high stability YSI46033 thermistor. It has an operating range of +5 ^oC to +30^oC and resolution of 0.002 ^oC to 0.005 ^oC with the variation in resolution due to the non-linear response of the thermistor used. The loggers were initially programmed to sample every 30 min from 1/12/97 until 5/10/97. This should fall within the power potential recommended by the battery manufacturer for the AA alkaline batteries. This present effort is being funded through a NSF Academic Research Infrastructure (ARI) grant #OCE96-01850, awarded to D. Karl, R. Lukas and P. Flament.

Description: The TR-1050 is a small (230mm x 38mm OD), self-contained, submersible temperature recorder with a calibration to ± 0.002 ^oC. Typical calibration drift of 0.002 ^oC per year has been measured. It can be deployed for a period of up to three years and can collect more than 2,400,000 samples. The TR-1050 has a measurement range of -5 ^oC to +35 ^oC in its standard calibration.

For the inaugural MOSEAN deployment, we used these newer thermisters at 160, 170, 180, 190, 250, 500 and 750 m. They were initially programmed to sample every 12 minutes.