... to make it artificially, because of the problems of the large amount of upwelling DOW, the dilution of nutrient salts in the sea, enduring the rough sea condition, the strength of very long riser pipe for upwelling, etc. MARINO-FORUM 21, a subsidiary of The Fisheries Agency of Japanese Government...

... drilling operation and the implementation of the next Deep Sea Drilling Project (DSDP) with a 10,000 tons class vessel, Glomar Challenger in 1968. drilling vessel upstream oil & gas penetration reservoir characterization chikyu drilling operation riser pipe drill pipe sea floor...

... ABSTRACT: The Ocean Nutrient Enhancer "TAKUMI" was installed in Sagami-Bay in May 2003. It is a SPAR type floating structure with a riser pipe for pumping up the Deep Ocean Water. The inner diameter and length of the riser pipe are 1m, and 175m. This riser pipe has strain gages, which were...

... is supported by the results of many researches on natural upwelling, e.g. Ryther's classical report (1969). dilution rate marine primary production ts diagram dow riser pipe discharge observation data mixed water seawater takumi upstream oil & gas density current generator deep ocean...

... productions, furthermore, conducting the experiment in actual sea to confirm the effect of the ONE. The requisite technologies for the ONE such as a density current diffusion, a spar type floating structure, a steel riser pipe, a set-up way of upending, etc. is discussed and integrated to create proto-type...

... Generator was presented (Ouchi et al 1998). technical element dow deep ocean water strength feasibility study requirement control room renewable energy riser pipe design requirement submerged type maintenance evaluation basis sagami bay nutrient criteria upstream oil & gas...