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Sediment echosounder raw data (Atlas Parasound P70 echosounder entire dataset) of RV POLARSTERN during cruise PS137
No full textSediment echosounder (Teledyne Parasound P70 echosounder) data are generally retrieved to get information on the characteristics of the upper tens of meters of the sub-seafloor. Raw primary high frequency (PHF) and secondary low frequency (SLF) echo sounding data were retrieved during POLARSTERN cruise PS137 (ALOIS) and are archived here in ASD and PS3 format. During POLARSTERN cruise PS137, the Parasound system was run along specific tracklines to gain a deeper insight of the underlying sediments or bedrock. The entire dataset of cruise PS137 is archived here
Sediment echosounder raw data (Atlas Parasound P70 echosounder entire dataset) of RV POLARSTERN during cruise PS123
No full textSediment echosounder (Teledyne Parasound P70 echosounder) data are generally retrieved to get information on the characteristics of the upper tens of meters of the sub-seafloor. Raw primary high frequency (PHF) and secondary low frequency (SLF) echo sounding data were retrieved during POLARSTERN cruise PS123 and are archived here in ASD and PS3 format. The entire dataset of cruise PS123 is archived here
The stoichiometric response of a freshwater plankton community to different nutrient pulse scenarios: A comparison across sites and seasons
No full textThree identical in-situ mesocosm experiments were conducted in the Swedish SITES AquaNet mesocosm and monitoring network (Urrutia-Cordero et al., 2021) to test the effects of nutrient pulses varying in intensity, frequency, and chronology on a freshwater plankton community. The three experiments were set up to simulate different rainfall scenarios with resulting run-off patterns and compare the effects across sites (two experiments conducted simultaneously at different lakes) and seasons (identical experiments conducted at the same lake in spring and summer). The first experimental run was conducted between the 6th of July and the 12th of August 2022, during the summer season, at Lake Erken and Lake Bolmen. The second experimental run was conducted between the 2nd of May and the 8th of June 2023 (spring) at Lake Erken. The lakes exhibit contrasting characteristics. Lake Erken is a large mesotrophic to eutrophic lake, whereas Lake Bolmen is a smaller oligotrophic lake (Urrutia-Cordero et al. 2021). The mesocosm system at Lake Erken consists of 16 polyethylene cylinders with a depth of 1.5 meters and a diameter of 0.8 meters attached to a floating jetty, whereas the system at Lake Bolmen is identical in equipment but placed out on the lake. Further details about the set-up of the systems, the filling of the mesocosms, installed sensor systems and additional measurements can be found in the experimental protocols: Further details about the set-up of the systems (Langenheder et al. 2024a), the conception of nutrient additions (Langenheder et al. 2024b), and installed sensor systems (Berger et al. 2024). The following experimental treatments consisting of simultaneous nitrogen, phosphorus, and dissolved organic carbon (DOC) additions were applied: (i) daily pulses of the same low intensity, (ii) multiple irregular pulses with variable intensity, (iii) one extreme pulse, and (iv) an unenriched control. The nutrient additions to each of the three nutrient pulse treatments summed up to the same total amount at the end of the simulated rainfall period (20 days) which was followed by a recovery period (17 days). Each of the four treatments was applied with a replication of four, resulting in a total of 16 mesocosms per experiment. Every fourth day, homogenized water samples were taken using a Ruttner water sampler from each mesocosm. The water sample from each mesocosm was then separated by a 105µm mesh into two size classes: seston smaller than 105µm and seston larger than 105µm. The size-fractioned water samples were then filtered onto one filter for particulate organic carbon and nitrogen (POC/PON) and one filter for particulate organic phosphorus (POP), respectively, using pre-combusted and acid-washed 0.45 µm glass microfiber filters (WHATMAN, GF/C). Additional filters for biogenic silicate (BSi) have been taken for seston smaller than 105µm (Whatman NC45 membrane filters, cellulose nitrate, 0.45µm, 25mm diameter; CAT no 10401106). In subsequent laboratory analyses, the filters for POC/PON were dried at 60 °C and measured using a CHN analyzer (Flash EA 1112, Thermo Scientific, Walthman, MA, USA). The POP filters were pre-combusted and analyzed by molybdate reaction after potassium peroxydisulfate digestion (Wetzel and Likens 2000) and photometrically analyzed using a microplate reader (SYNERGY H1, BioTek®). The BSi filters were oxidized, the samples were swirled and reagents (molybdate reagent, oxalic acid, and ascorbic acid) were added before photometrically measuring them using a microplate reader (same as above) following Grasshoff et al. (1999). The data for seston smaller than 105µm at Lake Erken in summer can be found in Happe et al. (2024)
Multibeam bathymetry processed data (Kongsberg EM 122 entire dataset) of RV MARIA S. MERIAN during cruise MSM31, Yermak Plateau, Arctic Ocean
No full textMultibeam data were collected during RV Maria S. Merian cruise MSM31 (2013-08-17 to 2013-09-18). Multibeam sonar system was Kongsberg EM 122 multibeam echosounder. Data are processed with Caris HIPS, including sound velocity correction with SV data from CTDs and World Ocean Atlas 18 (https://www.ncei.noaa.gov/archive/accession/NCEI-WOA18), tidal correction with TPXO9_atlas_v5 (https://www.tpxo.net), and manual cleaning. The soundings are combined in daily files, the format is XYZ ASCII ( ). Additional grids have been computed with depth dependent cell size to visualize the data. These grids are not meant for scientific analysis or navigation, but for overview purposes only
Physical properties (MSCL) of IODP Hole 386-M0084E
No full textMulti-Sensor Core Logger (MSCL) data (P-wave velocity, gamma ray attenuation (GRA) density, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR)) from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). These data were obtained from whole round core sections by means of a Geotek MSCL during the offshore phase of the expedition. The offshore phase of expedition 386 took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. As the aforementioned parameters are sensitive to temperature core sections were stored for at least 6 hours after arrival on deck before measurement to allow for temperature equilibration. The core physical properties were measured at predetermined optimal instrument-based spatial and temporal sampling intervals. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202
Physical properties (MSCL) of IODP Hole 386-M0085B
No full textMulti-Sensor Core Logger (MSCL) data (P-wave velocity, gamma ray attenuation (GRA) density, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR)) from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). These data were obtained from whole round core sections by means of a Geotek MSCL during the offshore phase of the expedition. The offshore phase of expedition 386 took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. As the aforementioned parameters are sensitive to temperature core sections were stored for at least 6 hours after arrival on deck before measurement to allow for temperature equilibration. The core physical properties were measured at predetermined optimal instrument-based spatial and temporal sampling intervals. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202
Physical properties (MSCL) of IODP Hole 386-M0085D
No full textMulti-Sensor Core Logger (MSCL) data (P-wave velocity, gamma ray attenuation (GRA) density, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR)) from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). These data were obtained from whole round core sections by means of a Geotek MSCL during the offshore phase of the expedition. The offshore phase of expedition 386 took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. As the aforementioned parameters are sensitive to temperature core sections were stored for at least 6 hours after arrival on deck before measurement to allow for temperature equilibration. The core physical properties were measured at predetermined optimal instrument-based spatial and temporal sampling intervals. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202
Physical properties (MSCL) of IODP Hole 386-M0089A
No full textMulti-Sensor Core Logger (MSCL) data (P-wave velocity, gamma ray attenuation (GRA) density, magnetic susceptibility, natural gamma radiation (NGR), noncontact resistivity (NCR)) from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). These data were obtained from whole round core sections by means of a Geotek MSCL during the offshore phase of the expedition. The offshore phase of expedition 386 took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. As the aforementioned parameters are sensitive to temperature core sections were stored for at least 6 hours after arrival on deck before measurement to allow for temperature equilibration. The core physical properties were measured at predetermined optimal instrument-based spatial and temporal sampling intervals. GRA density, P-wave velocity, NCR, and magnetic susceptibility were measured every 2 cm, and NGR measurements were obtained every 10 cm. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202
Core-section summary for IODP Site 386-M0092
No full textList of recovered core sections from the above given site of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan. Cores have been acquired by the use of a Giant Piston Coring (GPC) System. Recovered cores were divided into approx. 1 m long sections that are numbered sequentially from the top, starting at 1. Following IODP convention, material recovered from the core catcher of a sedimentary core is treated as a separate section labelled CC for core catcher and placed below the last section recovered from the core barrel. Most core catcher sections were placed in a bag due to their consistency. The IODP standard naming of sections includes the following information: expedition number, hole, core, core type and section. For example, a section label (column "Sample label") "386-M0081D-1H-12" represents section 12, core 1H ("H" [for hydraulic piston corer] indicates GPC cores, and "P" [for push corer] indicates trigger corer cores; see core summaries of this expedition), from Hole M0081D during Expedition 386. For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202
Color data (RGB) of IODP Hole 386-M0082D
No full textColor data obtained from split core sections from the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology) during the onshore phase. The onshore phase of expedition 386 took place between 2022-02-14 – 2022-03-15 onboard D/V Chikyu. After longitudinal splitting of the core sections, high-resolution (100 pixels/cm) images of archive half was captured using the Tri-Sensor Core Logger (TSCL; NS Design). The camera provides a 16-bit red-green-blue (RGB) color (48-bit) TIFF file from which the RGB data were derived in 1 mm down-core resolution. For each section: 1) the TIFF file (from line scanning) full resolution was opened and channels scaled to 0-255; 2) TIFF file cut at top (2475 px) and bottom (2470 px + length of the section x resolution); 3) for every line of pixel down section, R, G, B values were averaged over a width of 450 px across the centre of the section (\~4.5 cm width) and data placed into a table compiling all sections of a hole; 4) for every depth interval, where a piece of sponge was observed on the linescan, R, G, B data were deleted; 5) R, G, B data were also deleted to the top and bottom ~1 cm of each section, to account for possible gaps or pieces of liner.
For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.202