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Le Sea-Beam sondeur à multi-faisceaux du N/O Jean Charcot. Description, évaluation et premiers résultats

Le Sea-Beam sondeur à multi-faisceaux du N/O Jean Charcot. Description, évaluation et premiers résultats
Bathymétrie ; Cartographie automatique ; Fond sous-marin ; Généralités sur la géographie ; Instrumentation ; Sea-Beam
L'article décrit les caractéristiques principales du Sea-Beam. Il présente les résultats de 4 semaines de sorties d'essai et d'évaluation du système en avril et mai 1977. Il analyse enfin ses possibilités en matière de cartographie et d'analyse

Le Sea-Beam, sondeur à faisceaux multiples du navire océanographique Jean Charcot. Notice technique.

Le Sea-Beam, sondeur à faisceaux multiples du navire océanographique Jean Charcot. Notice technique.
Ce rapport présente le sondeur à multi-faisceaux étroits SEA-BEAM, qui a été installé sur le navire océanographique JEAN CHARCOT au printemps 1977. Ce sondeur permet de cartographier en un seul passage du navire un couloir dont la largeur représente

Geomorphic characterization of reef fish aggregation sites in the Upper Florida Keys, USA, using single-beam acoustics

Geomorphic characterization of reef fish aggregation sites in the Upper Florida Keys, USA, using single-beam acoustics
Bathymetry ; Cartography ; Continental slope ; Fish ; Florida ; Geophysics ; Habitat ; Marine reserve ; Reef ; Sea floor ; Submarine geomorphology ; United States of America
A commercial single-beam acoustic seabed classification system was used to map the seabed in the vicinity of aggregation sites. Results showed that drowned, margin-parallel, rocky ridges, known locally as outlier reefs, were features found

Carte bathymétrique de la dorsale Est-Pacifique de 10o Nord à 14o30' Nord.

Synthèse bathymétrique élaborée à partir des données Sea-Beam, obtenues au cours des transits et levés bathymétriques des N/O Jean-Charcot , Sonne et Washington compilés au 1 : 50 000 à 10o Nord.

Elektro-optisen etäisyysmittarin käytostä geomorfologisessa tutkimuksessa. (Utilisation d'un géodimètre électro-optique dans les recherches en géomorphologie)

The use of an electro-optical distance meter (Geodimeter AGA Model 76) in several kinds of geomorphological process studies is reported. The instrument is based on the use of a Laser beam with which it is possible to measure the distances with great
accurary. The electro-optical distance meter has been recommended for use in triangulation for aerial photomapping, locating the sampling points on frozen lakes and sea, following coastal processes and measuring the rate of movement of glaciers. Final

Distributions of horizon-limited direct beam potential radiation in steep pastures

Distributions of horizon-limited direct beam potential radiation in steep pastures
The objective of this work is to determine the spatial distribution of potential direct beam radiation within a small, steep watershed with a wide range of aspects and landscape positions and various shadow sources.

Elements for building a participatory, ecosystem-based marine reserve network

Atlantic Ocean ; Belize ; Caribbean Sea ; Continental slope ; Environmental management ; Fish ; Fishing ; Habitat ; Marine ecosystem ; Marine reserve ; Participation ; Reef ; Sea floor ; Sustainable development
papers, gray literature reports from Belize and other Caribbean nations, remotely sensed images, coarse bathymetric maps, new bathymetric data collected with a single-beam sonar, and reports of fishermen from various parts of the country, the AA

New challenges for tafoni research. A new approach to understand processes and weathering rates

subordinately provided by sea spray, as calcium and sodium sulfates rather than halite dominate even close to the coast. By applying 10Be-exposure dating, weathering rates of large mature tafone structures were found to be about an order of magnitude higher than
[b4] Lab. of Ion Beam Physics, Zurich, Suisse

Claiming a space in a changing South Africa: the squatters of Marconi Beam, Cape Town

Claiming a space in a changing South Africa: the squatters of Marconi Beam, Cape Town

Varnish microlaminations : new insights from focused ion beam preparation

Varnish microlaminations : new insights from focused ion beam preparation
The cross-sectional texture of rock varnish varies considerably with the scale of analysis and technique used to image a sample. One key to nanoscale analysis involves focused ion beam (FIB) techniques, but FIB preparation remains challenging

Atmospheric and environmental influences on wintertime shortwave radiation, San Juan mountains, Colorado, U.S.A.

The topography surrounding the three study sites influenced both beam and net shortwave radiation through a shadowing effect, a terrain reflecting component, slope angle and aspect of the terrain, as well as the range of elevations within

Influence of macroscale and microscale surface roughness on multi-beam RADARSAT-1 data : implications for geological mapping in the Curaçá valley (Brazil)

Influence of macroscale and microscale surface roughness on multi-beam RADARSAT-1 data : implications for geological mapping in the Curaçá valley (Brazil)

Instability investigation of cantilevered seacliffs

This study investigated the instability of 2 such failures that occurred in Solana Beach, California, by combining terrestrial LIDAR scanning, cantilever beam theory and finite element analysis. Each landslide was detected by evaluating the surface

The application of non-destructive methods to assess the stability of the national nature monument of the Pravčická Brána Rock Arch, Czech Republic

of the block fabric of the rock body and the nature of the contact zone between the arch beam and the southern pillar, discovery of relatively fresh secondary fissures and identification of zones with weakened strength within the sandstone massif. Long-term

Genesis of channel bank overhangs in the Niger Delta and analysis of mechanisms of failure

-technical and fluvio-tidal processes act singly or in combination to generate overhangs in channel banks. The failure of channel banks with overhangs involves one of four mechanisms, namely; rotation, beam, shear, and tension failure. A mathematical basis

Cliff instability in pumice flow deposits due to notch formation on the Asama mountain slope, Japan

physiques et mécaniques des matériaux de la falaise testés en laboratoire : 1) pour un effondrement radial (beam failure) et 2) pour un effondrement en planche (slab failure).

Chronologic and environmental implications of a new genus of fossil deer from Late Wisconsin deposits at Toronto, Canada

A new cervine deer (Torontoceros hypogaeus), described from a partial cranium with portions of the main antler beams, has been recovered from deposits of early Lake Ontario age on the exposed bench of Glacial Lake Iroquois at Toronto, Ontario

Sea level

Sea level
Bog ; Coastal dynamics ; Coastal environment ; Foraminifera ; Global change ; Indicator ; Quaternary ; Sea level
This report examines recent developments in relation to present (and anticipated future) sea level, Quaternary sea-level fluctuations, the response of coastal landforms to sea-level change and the use of biological indicators of sea-level change.

Relationship between the decrease of sea ice and early summer atmospheric circulation in and around the Sea of Okhotsk

Relationship between the decrease of sea ice and early summer atmospheric circulation in and around the Sea of Okhotsk
Anticyclone ; Atmospheric circulation ; Ocean atmosphere interaction ; Pacific Region ; Sea ice ; Time series ; Years 1970-79 ; Years 1980-89 ; Years 1990-99
The aim of this study is to clarify the relationships between the variability in sea ice area in the Sea of Okhotsk during the sea ice disappearance period, and the variability in the atmospheric circulation around the sea of Okhotsk during
the early summer, focused on the effects of the sea ice on the atmosphere. A strengthening of the Okhotsk anticyclone is presumed to be related to variability in the decrease in sea ice in the Sea of Okhotsk.

Sea level

Sea level
Bibliography ; Coastal environment ; Eustatism ; Global change ; Greenhouse effect ; Impact ; Quaternary ; Sea level ; Shoreline
This report will concentrate on aspects of Quaternary sea-level change, summaries of trends in sea-level over recent decades from tide gauges, and predictions of future sea-level change and the anticipated responses of the coast.

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