{ "tag": 7549, "title": "Archive of Chirp Subbottom Profile Data Collected in 2017 from the Louisiana Chenier Plain", "pubdate": "20190503", "sername": null, "series_name": null, "issue": "doi:10.5066\/P9XOZIBV", "publish": null, "publisher_name": null, "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/spcmsc\/2017_Chenier_metadata.faq.html", "format": null, "email": null, "descript": "June 2\u201310 and July 2, 2017, the U.S. Geological Survey (USGS) conducted geophysical surveys offshore of the Louisiana Chenier Plain to document the changing morphology of the coastal environment. Data were collected under the Barrier Island Coastal Monitoring (BICM) program, an ongoing collaboration between the State of Louisiana Coastal Protection and Restoration Authority (CPRA), the University of New Orleans (UNO) Pontchartrain Institute for Environmental Sciences (PIES), and the USGS. Project objectives include compiling historical shoreline bathymetric datasets and comparing them to other bathymetric data collected during the BICM project. At the same time, subsurface geophysical data were collected to investigate the geomorphology and geologic controls on barrier-shoreline evolution. This publication serves as an archive of unprocessed, digital chirp subbottom data, survey trackline maps, navigation files, geographic information system (GIS) data, and formal Federal Geographic Data Committee (FGDC) metadata. Processed subbottom profile images are also provided. The archived trace data are in standard Society of Exploration Geophysicists (SEG) SEG Y revision 0 format (Barry and others, 1975) and may be downloaded and processed with commercial or public domain software such as Seismic Unix (SU). These data are available for viewing using GeoMapApp (http:\/\/www.geomapapp.org\/) and Virtual Ocean (http:\/\/www.virtualocean.org\/) multi-platform open source software. In addition, the SEG Y files can be downloaded from the USGS Coastal and Marine Geoscience Data System (CMGDS, https:\/\/cmgds.marine.usgs.gov).", "lang": null, "journal": null, "pwid": null, "originator": [ { "name": "Forde, Arnell S.", "role": "Author" }, { "name": "Fredericks, Jake J.", "role": "Author" }, { "name": "Flocks, James G.", "role": "Author" } ], "index_term": [ { "thcode": 2, "code": "1799", "name": "coastal processes", "scope": "Processes unique to coastal areas including longshore transport, beach erosion, storm surge, shoreline change, delta formation, barrier island migration, beach stabilization by vegetation" }, { "thcode": 2, "code": "464", "name": "geology", "scope": "Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin." }, { "thcode": 2, "code": "706", "name": "marine geology", "scope": "Branch of geology concerned with the composition, geologic history, and earth processes of the ocean floor and the continental margin." }, { "thcode": 2, "code": "2054", "name": "sub-bottom profiling", "scope": "Methods of imaging the structure of sediments below the sea floor or lakebed using ship-borne or towed sensors with a variety of sound sources." }, { "thcode": 15, "code": "008", "name": "geoscientificInformation", "scope": "Information pertaining to earth sciences, for example geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth's rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, groundwater, erosion" }, { "thcode": 15, "code": "014", "name": "oceans", "scope": "Features and characteristics of salt water bodies (excluding inland waters), for example tides, tidal waves, coastal information, reefs, maritime, outer continental shelf submerged lands, shoreline" }, { "thcode": 23, "code": "3", "name": "Distributions", "scope": "Locations or patterns of a feature of interest across space and (or) time. These data can include point data, lines, polygons, and temporal data at any scale relevant to CMSP and can be produced by observation, interpolation, or modeling. Distributions can also include maps or statistics of climatology, the environmental values that are expected to be observed at the present time." }, { "thcode": 23, "code": "21", "name": "Physical Habitats and Geomorphology", "scope": "Includes measures of the geologic and structural characteristics of the coast or sea floor, such as the features defined in the Geoform Component of CMECS. Distributions are detailed topographic and bathymetric maps, geolocated photographs, or sea-floor descriptions; Distributions includes maps that interpret observations to categorize areas on the basis of geoform types such as those in CMECS. Assessment types include evaluations of ecological or human use value and can include models that project environmental or economic effects of erosion, climate change, dredging, and other stressors. Predictions are the results of models or projections of future distributions, values, or ecological impacts of physical habitats, including predicted changes due to natural and human forces; they are also from scenario-based models of resource losses, gains, or impacts on ecological or economic values under different management strategies (for example, mining, removal, relocation, or the building of structures)." }, { "thcode": 61, "code": "479", "name": "seismic reflection profiling", "scope": "technique for determining the composition and structure of subsurface earth materials based on the transmission and reflection of artificially induced seismic waves; in practice, the seismic waves are generated and received at a one location (in marine geophysical studies, a single ship)." } ], "place_term": [ { "thcode": 1, "code": "fUS", "name": "United States", "scope": "country", "pname": "North America" }, { "thcode": 1, "code": "f17183", "name": "Vermilion", "scope": "county", "pname": "Illinois" }, { "thcode": 1, "code": "q30094NE", "name": "White Lake", "scope": "map quadrangle, 30x60 minute", "pname": "Port Arthur" }, { "thcode": 1, "code": "q30094NEG4", "name": "Cheniere Au Tigre", "scope": "map quadrangle, 7.5 minute", "pname": "White Lake" }, { "thcode": 1, "code": "q30094NEA2", "name": "Grand Chenier", "scope": "map quadrangle, 7.5 minute", "pname": "White Lake" }, { "thcode": 1, "code": "q30094NEE3", "name": "Pecan Island", "scope": "map quadrangle, 7.5 minute", "pname": "White Lake" }, { "thcode": 1, "code": "q30094NWA3", "name": "Sabine Pass", "scope": "map quadrangle, 7.5 minute", "pname": "Port Arthur" }, { "thcode": 1, "code": "fOC16", "name": "Gulf of Mexico", "scope": "ocean or sea", "pname": "Atlantic" }, { "thcode": 1, "code": "fUS22", "name": "Louisiana", "scope": "state", "pname": "United States" } ], "image": [], "fan": [ "2017-323-FA", "2017-324-FA" ] }