Chl a fluorescence is a proxy for concentration of the
pigment; excitation was at 470 nm with emission measured
at 682 nm. Optical backscatter of particles (a proxy for
particle concentration), determined from total backscatter
minus the contribution from water, was measured at two
wavelengths and is reported as bbp(470) and bbp(700); as the
patterns are similar in this paper we report only bbp(700)
and refer to it as particulate backscatter. At recovery the
optical face of the fluorescence–backscatter sensor appeared
clean, with little to no fouling, most likely because
the glider is deployed seaward of the biologically rich shelf,
spent little time in the euphotic zone (,5%), and most time
at low temperatures and high pressures. Instrument
performance was consistent and stable across deployments
with ,2% change in light-emitting diode (LED) intensity at
a given temperature (assessed using internal LED reference
detectors); deep-water counts were also stable over each
mission. The average clearest deep-water value at 150 m
measured for an individual sensor was subtracted as
Chl a fluorescence is a proxy for concentration of thepigment; excitation was at 470 nm with emission measuredat 682 nm. Optical backscatter of particles (a proxy forparticle concentration), determined from total backscatterminus the contribution from water, was measured at twowavelengths and is reported as bbp(470) and bbp(700); as thepatterns are similar in this paper we report only bbp(700)and refer to it as particulate backscatter. At recovery theoptical face of the fluorescence–backscatter sensor appearedclean, with little to no fouling, most likely becausethe glider is deployed seaward of the biologically rich shelf,spent little time in the euphotic zone (,5%), and most timeat low temperatures and high pressures. Instrumentperformance was consistent and stable across deploymentswith ,2% change in light-emitting diode (LED) intensity ata given temperature (assessed using internal LED referencedetectors); deep-water counts were also stable over eachmission. The average clearest deep-water value at 150 mmeasured for an individual sensor was subtracted as
การแปล กรุณารอสักครู่..