FN Archimer Export Format PT J TI The Underwater Vision Profiler 5: An advanced instrument for high spatial resolution studies of particle size spectra and zooplankton BT AF PICHERAL, Marc GUIDI, Lionel STEMMANN, Lars KARL, David M. IDDAOUD, Ghizlaine GORSKY, Gabriel AS 1:1,2;2:3;3:1,2;4:3;5:1,2;6:1,2; FF 1:;2:;3:;4:;5:;6:; C1 Univ Paris 06, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France. CNRS, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France. Univ Hawaii, Dept Oceanog, Ctr Microbial Oceanog Res & Educ, Honolulu, HI 96822 USA. C2 UNIV PARIS 06, FRANCE CNRS, FRANCE UNIV HAWAII, USA IF 1.823 TC 162 UR https://archimer.ifremer.fr/doc/00133/24413/22426.pdf LA English DT Article CR BOUM POTESMER 2007 BO L'Atalante Téthys II DE ;video plankton recorder;marine snow;MU-M;vertical distribution;aggregate dynamics;in situ;system;ocean;flux;phytoplankton AB The Underwater Vision Profiler (UVP) was developed to quantify the vertical distribution of macroscopic particles and zooplankton > 100 mu m in size. The smaller size limit is fixed by optical resolution, whereas the larger size limit is determined by the volume of water illuminated per image. The new fifth generation instrument (UVP5) is compact (30 kg in air) and operates either as a stand-alone instrument with an independent power supply for use on a mooring or free-drifting array, or as a component of a Conductivity, Temperature, and Depth (CTD)-rosette package. Images are recorded at a frequency up to 6 Hz. If the UVP5 is interfaced with a CTD, these images are acquired and analyzed in real time. Images are recorded every 20 cm at the 1 m s(-1) lowering speed. The current maximum deployment depth is 3000 m. The recorded volume per image is 1.02 L, and the conversion equation from pixel area to size in mm(2) is S(m) = 0.003S(p)(1.3348) where S(p) is the surface of the particle in pixels and S(m) the surface in mm(2). Comparisons between the earlier UVP versions and UVP5 indicate that images ranging in size from 105 mu m to 2.66 mm are identical so historical and contemporary data sets can be compared. PY 2010 PD SEP SO Limnology And Oceanography-methods SN 1541-5856 PU Amer Soc Limnology Oceanography VL 8 UT 000284106900002 BP 462 EP 473 DI 10.4319/lom.2010.8.462 ID 24413 ER EF