Citation:

PANGAEA.895350

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Abstract:

Multibeam echosounder (MBES) data recorded during RV METEOR cruise M134/1 between 16.01.2017 and 18.02.2017 around South Georgia. The main objective of was to investigate emissions of free gas from cross‐shelf troughs of South Georgia, their distribution, quantification, and sources for methane ebullition sites in sub‐Antarctic waters. Another objective was the mapping of the glacial bathymetry on the shelf. CI Citation: Paul Wintersteller (seafloor-imaging@marum.de) as responsible party for bathymetry raw data ingest and approval.

Description of the data source:

During the cruise RV METEOR M134/1 the hull-mounted Kongsberg EM122 with a nominal sonar frequency of 12 kHz was utilized. The EM122 system is a deep‐water multibeam echosounder providing accurate bathymetric mapping down to full ocean depth. 288 beams with an acoustical footprint of 1°(TX)/2°(RX) are formed for each ping. For further information consult https://www.km.kongsberg.com/. During this cruise the swath width was set to 130° and the high-density equidistant and the dual-swath mode of the EM122 was used, resulting in up to 864 soundings per ping. The survey speed was kept between 6-10 knots depending on weather conditions and flare surveying. The main purposes of most of the surveys were mapping for bathymetry and searching for gas flares in the water column. Since the EM710 was recording almost continuously, the EM122 was mainly used for transits, in water depth deeper than 500 m or for short dedicated surveys in order to achieve better backscatter information. Responsible person during this cruise / PI: Wilhelm Weinrebe (wweinrebe@geomar.de) & Paul Wintersteller (pwintersteller@marum.de).

Chief Scientist: G. Bohrmann (gbohrmann@marum.de)

CR: https://elib.suub.uni-bremen.de/edocs/00106081-1.pdf

CSR: http://www.bsh.de/aktdat/dod/fahrtergebnis/2017/20170002.htm

A special thanks goes to the watch keeper during M134/1: Viola Bihler, Maximilian Grahs, Miriam Römer and Nikolas Stange.

Further details:

Bohrmann, Gerhard; Aromokeye, Adeyemi David; Bihler, Viola; Dehning, Klaus; Dohrmann, Ingrid; Gentz, Torben; Grahs, M; Hogg, O; Hüttich, Daniel; Kasten, Sabine; Kirschenmann, E; Lange, Mirko; Leymann, Tom; Linse, Katrin; Loher, Markus; Malnati, Janice; Mau, Susan; Mickoleit, Anett; Nowald, Nicolas; Pape, Thomas; Reuter, Christian; Römer, Miriam; Sahling, Heiko; Stange, Nikolas; Torres, Marta E; Vittori, Vincent; von Dobeneck, Tilo; von Neuhoff, Holger; Weinrebe, Reimer Wilhelm; Wintersteller, Paul (2017): R/V METEOR Cruise Report M134, Emissions of Free Gas from Cross-Shelf Troughs of South Georgia: Distribution, Quantification, and Sources for Methane Ebullition Sites in Sub-Antarctic Waters, Port Stanley (Falkland Islands) - Punta Arenas (Chile), 16 January - 18 February 2017. Berichte aus dem MARUM und dem Fachbereich Geowissenschaften der Universität Bremen, 317, 220 pp, urn:nbn:de:gbv:46-00106081-12

Coverage:

Median Latitude: -52.448610 * Median Longitude: -64.413885 * South-bound Latitude: -53.197220 * West-bound Longitude: -71.011110 * North-bound Latitude: -51.700000 * East-bound Longitude: -57.816660

Event(s):

M134/1-track * Latitude Start: -51.700000 * Longitude Start: -57.816660 * Latitude End: -53.197220 * Longitude End: -71.011110 * Campaign: * Basis: * Method/Device: Underway cruise track measurements (CT)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator
1	File name	File name		Wintersteller, Paul
2	File format	File format		Wintersteller, Paul
3	File size	File size	kByte	Wintersteller, Paul
4	Uniform resource locator/link to file	URL file		Wintersteller, Paul

License:

Licensing unknown: Please contact principal investigator/authors to gain access and request licensing terms (UNKNOWN)

Status:

Curation Level: Basic curation (CurationLevelB) * Processing Level: PANGAEA data processing level 1 (ProcLevel1)

Size:

4080 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 File name	2 File format	3 File size [kByte]	4 URL file
0000_20170117_000049_M134_EM122_.all	ALL	107780.790	0000_20170117_000049_M134_EM122_.all
0000_20170117_000049_M134_EM122_.wcd	WCD	195169.864	0000_20170117_000049_M134_EM122_.wcd
0000_20170119_190152_M134_EM122.all	ALL	6962.020	0000_20170119_190152_M134_EM122.all
0000_20170119_190152_M134_EM122.wcd	WCD	10731.784	0000_20170119_190152_M134_EM122.wcd
0000_20170119_191405_M134_EM122.all	ALL	3921.006	0000_20170119_191405_M134_EM122.all
0000_20170119_191405_M134_EM122.wcd	WCD	6532.464	0000_20170119_191405_M134_EM122.wcd
0000_20170119_205032_M134_EM122.all	ALL	36205.892	0000_20170119_205032_M134_EM122.all
0000_20170119_205032_M134_EM122.wcd	WCD	53544.618	0000_20170119_205032_M134_EM122.wcd
0000_20170121_224212_M134_EM122.all	ALL	48604.824	0000_20170121_224212_M134_EM122.all
0000_20170121_224212_M134_EM122.wcd	WCD	91681.758	0000_20170121_224212_M134_EM122.wcd
0000_20170124_100628_M134_EM122.all	ALL	90747.112	0000_20170124_100628_M134_EM122.all
0000_20170124_100628_M134_EM122.wcd	WCD	163340.396	0000_20170124_100628_M134_EM122.wcd
0000_20170125_163009_M134_EM122.all	ALL	134460.564	0000_20170125_163009_M134_EM122.all
0000_20170125_163009_M134_EM122.wcd	WCD	198684.452	0000_20170125_163009_M134_EM122.wcd
0000_20170129_000242_M134_EM122.all	ALL	31032.990	0000_20170129_000242_M134_EM122.all
0000_20170129_000242_M134_EM122.wcd	WCD	70553.044	0000_20170129_000242_M134_EM122.wcd
0000_20170129_231701_M134_EM122.all	ALL	53682.640	0000_20170129_231701_M134_EM122.all
0000_20170129_231701_M134_EM122.wcd	WCD	153718.190	0000_20170129_231701_M134_EM122.wcd
0000_20170131_110545_M134_EM122.all	ALL	46343.842	0000_20170131_110545_M134_EM122.all
0000_20170131_110545_M134_EM122.wcd	WCD	82144.800	0000_20170131_110545_M134_EM122.wcd
0000_20170201_150538_M134_EM122.all	ALL	28070.782	0000_20170201_150538_M134_EM122.all
0000_20170205_005523_M134_EM122.all	ALL	45685.932	0000_20170205_005523_M134_EM122.all
0000_20170205_005523_M134_EM122.wcd	WCD	117705.980	0000_20170205_005523_M134_EM122.wcd
0000_20170206_150847_M134_EM122.all	ALL	64883.290	0000_20170206_150847_M134_EM122.all
0000_20170206_150847_M134_EM122.wcd	WCD	110667.200	0000_20170206_150847_M134_EM122.wcd
0000_20170209_165309_M134_EM122.all	ALL	11687.550	0000_20170209_165309_M134_EM122.all
0000_20170209_165309_M134_EM122.wcd	WCD	19204.034	0000_20170209_165309_M134_EM122.wcd
0000_20170209_200735_M134_EM122.all	ALL	70949.140	0000_20170209_200735_M134_EM122.all
0000_20170209_200735_M134_EM122.wcd	WCD	111360.614	0000_20170209_200735_M134_EM122.wcd
0000_20170212_111414_M134_EM122.all	ALL	21049.792	0000_20170212_111414_M134_EM122.all
0000_20170212_111414_M134_EM122.wcd	WCD	43154.122	0000_20170212_111414_M134_EM122.wcd
0001_20170117_003049_M134_EM122_.all	ALL	83841.592	0001_20170117_003049_M134_EM122_.all
0001_20170117_003049_M134_EM122_.wcd	WCD	198734.414	0001_20170117_003049_M134_EM122_.wcd
0001_20170119_203347_M134_EM122.all	ALL	18906.894	0001_20170119_203347_M134_EM122.all
0001_20170119_203347_M134_EM122.wcd	WCD	28842.338	0001_20170119_203347_M134_EM122.wcd
0001_20170119_212032_M134_EM122.all	ALL	47731.820	0001_20170119_212032_M134_EM122.all
0001_20170119_212032_M134_EM122.wcd	WCD	120825.970	0001_20170119_212032_M134_EM122.wcd
0001_20170121_230916_M134_EM122.all	ALL	8276.684	0001_20170121_230916_M134_EM122.all
0001_20170121_230916_M134_EM122.wcd	WCD	11157.396	0001_20170121_230916_M134_EM122.wcd
0001_20170124_103628_M134_EM122.all	ALL	61070.744	0001_20170124_103628_M134_EM122.all