Instrument: Multi-Variate Moored System

 Multi-Variate Mooring
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The Multi-Variate Moored Systems deployed during the US JGOFS EqPac Process Study was a package of integrated meteorological instruments. The Multi-Variate Moored System included instruments for measuring bio-optical and physical variables including water temperature, current direction and velocity, PAR, Lu683 (upwelling radiance, chlorophyll a fluorescence), and salinity. Instrumentation included: (1) a vector measuring current meter (VMCM; EG&G; Weller and Davis, 1980); (2) a fluorometer measuring strobe-stimulated fluorescence (Sea Tech; Bartz et al., 1988); (3) a transmissometer measuring beam transmission at 660 nm (Sea Tech; Bartz et al., 1978); (4) a sensor measuring scalar irradiance or photosynthetic available radiation, PAR, (E-PAR) in the visible waveband (400 < 700 nm, in vacua; Biospherical Instruments, QSP-200; Booth, 1976); (5) a sensor for measuring downwelled vector irradiance at 488 nm (Ed(488); Biospherical Instruments, QCP-200); (6) a sensor for measuring upwelled radiance at 683 nm (Lu683); Biospherical Instruments MRP-200); (7) a dissolved oxygen sensor (ENDECO, Inc.) and thermistors for measuring temperature. (Dickey et al. 1993 and Foley et al. 1997).

Bartz, R., Zaneveld, J. R.V. and Pak, H. (1978) A transmissometer for profiling and moored observations in water. SPIE, Ocean Optics V, 160, 102-107.

Booth, C. R. (1976) The design and evaluation of a measurement system for photosynthetically active quantum scalar irradiance. Limnology and Oceanography, 19, 326-335.

Dickey, TD, Granata, T., Marra, J., Langdon, G, Wiggert, J., Chai-Jochner, Z., Hamilton, M., Vazquez, J.,. Stramska, M., Bidigare, R., Siegel, D. 1993. Seasonal Variability of Bio-Optical and Physical Properties in the Sargasso Sea, J. Geophys. Res., 98(C1), 865-898, doi:10.1029/92JC01830.

Foley, D.G., T.D. Dickey, M.J. McPhaden, R.R. Bidigare, M.R. Lewis, R.T. Barber, S.T. Lindley, C. Garside, D.V. Manov and J.D. McNeil (1997). Longwaves and Primary Productivity Variations in the Equatorial Pacific at 0 degrees, 140 degrees W. Deep Sea Research II, 44(9-10): 1801-1826.

Weller, R. A. and Davis, R. E. (1980) A vector measuring current meter. Deep-Sea Research, 27A, 565-582.