SACLANTCEN Code of Practice for Safe Scientific Diving

SACLANTCEN Code of Practice for Safe Scientific Diving PDF Author: Federico De Strobel
Publisher:
ISBN:
Category : Deep diving
Languages : en
Pages : 23

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Code of Practice for Scientific Diving

Code of Practice for Scientific Diving PDF Author:
Publisher:
ISBN:
Category : Deep diving
Languages : en
Pages : 251

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Scientific Diving

Scientific Diving PDF Author: Nicholas Coit Flemming
Publisher:
ISBN:
Category : Sports & Recreation
Languages : en
Pages : 278

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Scientific Diving

Scientific Diving PDF Author: Scientific Committee of the World Underwater Federation
Publisher: Unipub
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 254

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Bibliography on Diving and Diving Safety for a Scientific Diving Program

Bibliography on Diving and Diving Safety for a Scientific Diving Program PDF Author: Margaret A. Rioux
Publisher:
ISBN:
Category : Deep diving
Languages : en
Pages : 57

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Diving, scientific diving, and diver safety are specialized subject areas not generally well-represented in even the largest of academic libraries, largely because of difficulties in locating appropriate items to include in the collection. However, in order to adequately fulfill his/her responsibilities, the Diving Safety Officer of a scientific diving program needs easy access to a broad range of books, reports, and journals covering all aspects of diving. This bibliography outlines a comprehensive collection appropriate to the needs of a scientific diving program in a research or academic institution. Items are grouped in broad subject areas corresponding to various aspects of the diving program. Both title and author indexes are also included.

SACLANTCEN's Use of Scuba Diving in Oceanographic and Acoustic Research

SACLANTCEN's Use of Scuba Diving in Oceanographic and Acoustic Research PDF Author: Federico De Strobel
Publisher:
ISBN:
Category : Ocean bottom
Languages : en
Pages : 17

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Over ten years of scientific diving for oceanographic and acoustics research is described. Examples show the need for a scientist to dive even in highly automated activities. Diving operations in oceanographic research have included: deployment of oceanographic buoys and sensors, check-and-recovery operations, installation of bottom-mounted systems, placing fluorescent dye releasers for oceanographic investigations, in-situ calibration of neutrally buoyant floats, and evaluations of low-speed towed bodies. Diving operations in underwater acoustics research have included: visual and stereophotographic investigations and sampling of the sea floor and in-situ measurements of the acoustic characteristics of sediments using geophones and electroacoustic transducers. These operations and techniques are described and some reference is given to organization, safety rules, and operational limits.

Geothermal Heat Flux at the COST B-2 and B-3 Wells, U. S. Atlantic Continental Margin

Geothermal Heat Flux at the COST B-2 and B-3 Wells, U. S. Atlantic Continental Margin PDF Author: B Della Vedova
Publisher:
ISBN:
Category : Earth temperature
Languages : en
Pages : 79

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Heat flow estimates at two sites on the U.S. Atlantic continental margin are presented. An estimate of the heat flowing from the basement also has been obtained. About 4.8 km of sediments penetrated at the COST B-2 and 4.0 km at the COST B-3 were deposited since the Upper Jurassic. Well logs were used to evaluate thermal gradients and sedimentation rates, whereas thermal conductivities and radiogenic heat productions were measured on drill cuttings samples. A procedure to estimate in-situ thermal conductivity from drill cuttings and well logs is described. A substantial set of samples, in the form of drill cuttings, were sorted in four major lithologies: sandstones, siltstones, shales and limestones. Laboratory measurements of density, porosity, thermal conductivity, quartz (%), potassium (%), uranium (ppm) and thorium (ppm) were performed on 128 reorganized and pulverized samples. A significant correlation of the matrix thermal conductivity to quartz and potassium content was found. In situ porosity and volume fraction of each lithology, determined mainly from well logs, were used to calculate in situ mean thermal conductivity. Finally the mean in situ vertical component of the thermal conductivity, as required for heat flow values, has been estimated from a correction factor for the anisotropy of each lithology. The in-situ temperature and anisotropy effects substantially decrease estimates of thermal conductivity at depth. Below the uppermost 1 km in both wells the best estimate of the thermal gradient is 26.3°C km- 1 at COST B-2 and 26.1°C km- 1 at COST B-3, whereas in situ mean thermal conductivities range between about 1.8 and 1.9 W m- 1 K- 1 (4.3-4.5 T.C.U.). The average heat flow is estimated as about 45 mwm- 2 (1.07 H.F.U.) at COST B-2 and 44 mWm- 2 (1.06 H.F.U.) at COST B-3, with an uncertainty of about 20-25%. The mean radiogenic production in sediments at the two sites has been estimated as 1.83 (COST B-2) and 1.44 (COST B-3) 10- 6Wm- 3. With a 12-14 km thick sedimentary sequence a radioactive contribution of 20-25 mWm- 2 can be expected. The effects of sediment deposition, compaction, pore water advection and radiogenic heat production have been combined in a numerical model (Hutchison, 1985) to estimate the undisturbed basement heat flux. Although the sedimentation depresses the basement heat flux by 15-20%, this effect is more than compensated by radioactive heat production in the sediments, so that the surface flux is estimated to be higher than that from the basement. The latter is calculated at about 33-39 mwm- 2 (0.8-0.9 H.F.U.), a relatively low value. The overall uncertainity is about ± 20-25%, and other estimates on continental margins with thick sediments (e.g. Reiter and Jessop, 1985) probably have at least a similar uncertainty.

Unesco Technical Papers in Marine Science

Unesco Technical Papers in Marine Science PDF Author: Unesco
Publisher:
ISBN:
Category : Marine biology
Languages : en
Pages :

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Bollettino Di Oceanologia Teorica Ed Applicata

Bollettino Di Oceanologia Teorica Ed Applicata PDF Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages :

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First Italian Expedition of Geological Oceanography in the Ross Sea (Antarctica)

First Italian Expedition of Geological Oceanography in the Ross Sea (Antarctica) PDF Author: Antonio Brambati
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 188

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