cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.972749
title: Magnetic susceptibility in dated sediment core from lake Santa Maria del Oro (Nayarit, Mexico)

description: This dataset comprises magnetic susceptibility data for a sediment sequence (LSMo22-1) from lake Santa Maria del Oro (Nayarit, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (97 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth &gt;50 m) in April 2022. Prior to sediment sectioning, the core was scanned with a magnetic susceptibility probe with 5 mm step size. The data are provided from the sediment surface down to the depth of 34 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and three radiocarbon (C-14) measurements.
DOI: 10.1594/pangaea.972750
title: Magnetic susceptibility in dated sediment core from lake Teremendo (Michoacán, Mexico)

description: This dataset comprises magnetic susceptibility data for a sediment sequence (LTe22-1) from lake Teremendo (Michoacán, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (155 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth ~8 m) in April 2022. Prior to sediment sectioning, the core was scanned with a magnetic susceptibility probe with 5 mm step size. The data are provided from the sediment surface down to the depth of 46.5 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and four radiocarbon (C-14) measurements.
DOI: 10.1594/pangaea.972748
title: High-resolution core scanning data (X-ray fluorescence and X-ray computed tomography) in dated sediment core from lake Teremendo (Michoacán, Mexico)

description: This dataset comprises high-resolution biogeochemical data for a sediment sequence (LTe22-1) from lake Teremendo (Michoacán, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (155 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth ~8 m) in April 2022. Prior to sediment sectioning, the core was analysed with Itrax X-ray fluorescence core scanning and X-ray computed tomography with 500 microns step size. The scan data are provided from the sediment surface down to the depth of 46.6 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and four radiocarbon (C-14) measurements. Elemental intensities have been centered log-ratio (clr) transformed and all elemental data have been min-max normalized.
DOI: 10.1594/pangaea.972745
title: Sediment biogeochemistry and diatom assemblages in dated sediment core from lake Santa Maria del Oro (Nayarit, Mexico)

description: This dataset comprises multiproxy biogeochemical data and diatom assemblage data for a sediment sequence (LSm-22-1) from lake Santa Maria del Oro (Nayarit, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (97 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth &gt;50 m) in April 2022. After initial core scanning, the sediment core was sectioned at 5-mm to 1-cm intervals. The data are provided for these discrete sediment sections from 0 cm down to the depth of 34 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and three radiocarbon (C-14) measurements. Diatom data include taxa present with at least 0.5% relative abundance in any sample.
DOI: 10.1594/pangaea.945724
title: Seismic reflection processed data of profile P02 (BGR18-202) during SONNE cruise SO267, Lau Basin, South Pacific Ocean

description: Reflection seismic data from cruise SO267 (ARCHIMEDES I), profile BGR18-202. Data acquistion during January 2019 (Station SO267_81-1) using a 312 channel Sentinel RD streamer (3900 m active length) and a 12 G-Gun array (84 liters). Processing up to prestack depth migration.
DOI: 10.1594/pangaea.950359
title: Primary production and chlorophyll a measured from water bottle samples during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. Chlorophyll a was measured from photometric analysis based on Evans et al, (1987).We converted the cell abundance of the different autotrophic pico- and nanoplankton populations into biomass based on Hernández-Hernández et al. (2020, https://doi.org/10.3389/fmars.2020.00667). Extracellular release rates, dissolved-, particulate- and total- primary production rates were determined from 14C incorporation according to Nielsen (1952, https://doi.org/10.1093/icesjms/18.2.117) and Gargas (1975).
DOI: 10.1594/pangaea.950520
title: Maximum mixed layer depth (MLD) and surface chlorophyll-a measured during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. Mixed layer depth and surface chlorophyll-a concentrations are shown.
DOI: 10.1594/pangaea.981065
title: 2D multichannel seismic reflection raw data (GI Gun) of RV SONNE cruise SO182 in 2005 to the Agulhas Plateau, seismic reflection profile AWI-20050301

description: Seismic reflection data collected in the Mozambique Ridge during cruise SO182 with RV Sonne in 2005. 8 G-guns and a 32 l Bolt airgun were used a seismic source, the data were recorded with a 2250 m (active length) long digital streamer. The data are unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report (Uenzelmann-Neben, 2005) or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.980882
title: 2D multichannel seismic reflection raw data (GI Gun) of RV SONNE cruise SO182 in 2005 to the Agulhas Bank, seismic reflection profile AWI-20050101

description: Seismic reflection data collected in the Agulhas Bank during cruise SO182 with RV Sonne in 2005. 8 G-guns and a 32 l Bolt airgun were used a seismic source, the data were recorded with a 2250 m (active length) long digital streamer. The data are unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report (Uenzelmann-Neben, 2005) or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.981064
title: 2D multichannel seismic reflection raw data (GI Gun) of RV SONNE cruise SO182 in 2005 to the Agulhas Plateau, seismic reflection profile AWI-20050201

description: Seismic reflection data collected in the Agulhas Plateau during cruise SO182 with RV Sonne in 2005. 8 G-guns and a 32 l Bolt airgun were used a seismic source, the data were recorded with a 2250 m (active length) long digital streamer. The data are unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report (Uenzelmann-Neben, 2005) or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.932882
title: Photosynthetically active radiation during in-situ incubations in February 2018 in Kongsfjorden (79°N)

description: The AWI-funded AMUST project aims at understanding at current and future controls of Arctic spring blooms and concurrent effects on biogeochemistry by combining experimental work with long-term monitoring in Kongsfjorden in spring. This dataset encompasses ecophysiological data (Chl-a, POC, C:N, 14C-based Primary Production) from surface water samples collected at the Ny-Ålesund jetty in February 2018, as well as two datasets of 24h continuous light measurements during in-situ incubations 0.2m below the sea surface.
DOI: 10.1594/pangaea.946076
title: Under-ice temperature and dissipation rate profiles from uprising VMP250 during MOSAiC

description: This dataset contains measurements of temperature and dissipation rate of turbulent kinetic energy (ε) obtained during the international Multidisciplinary drifting Observatory for the Study of the Arctic Climate (MOSAiC) campaign using a novel ascending microstructure profiler. A total of 235 successful profiles were conducted between 22 February 2020 and 17 September 2020 along the MOSAiC drift covering the central Arctic Ocean (Nansen and Amundsen Basin), the Yermak Plateau and the Fram Strait region. The main purpose of the measurements was to capture under-ice turbulence in the ice-ocean boundary layer. Standard, free-falling microstructure profilers do not provide usable data in the top several meters under the ice, as they are still accelerating there. Using an internal-recording VMP-250-IR microstructure profiler (SN 104) in novel upriser configuration allows us to measure turbulence until directly (within 1 m) under the ice-ocean interface. The instrument setup and deployment procedure is described in Fer et al. 2022, linked in the dataset. Profiles were taken during varying ice and meteorological conditions. The dissipation rate was calculated from shear-probe data following best-practice processing procedures outlined in the ATOMIX wiki (https://wiki.app.uib.no/atomix/index.php/Shear_probes).
DOI: 10.1594/pangaea.959739
title: Bacterial production, community respiration and primary production rates measured from water bottle samples during METEOR cruise M160

description: This dataset includes measured and calculated data over the epi-mesopelagic layer (0-450 m depth) of 29 stations with 4 stations within a cyclonic eddy nearby Brava island, 5 stations within a cyclonic eddy nearby Sal island, and one station within an anticyclonic eddy around the Cabo Verde islands in the eastern Tropical North Atlantic during the M160 cruise on the RV Meteor from November 22nd to December 20th, 2019. Bacterial biomass production rates were measured through the incorporation of labelled leucine (3H) using the microcentrifuge method (Kirchman et al., 1985, https://doi.org/10.1128/aem.49.3.599-607.1985; Smith and Azam, 1992). Extracellular release rates, dissolved-, particulate- and total- primary production rates were determined from 14C incorporation according to Nielsen (1952, https://doi.org/10.1093/icesjms/18.2.117) and Gargas (1975). Community respiration was measured from optodes based method (Wikner et al., 2013; https://doi.org/10.4319/lom.2013.11.1).
description: Bacterial biomass production and community respirations rates were measured from incubation at 13°C and primary production rates from incubations at 22°C.
DOI: 10.1594/pangaea.959608
title: Net primary production of Laminaria hyperborea along the vertical depth profile based on different diffuse attenuation coefficients

description: Over the whole water column, daily diffuse attenuation coefficient (Kd in 1/m) values are based on in situ photosynthetically active radiation (PAR) measurements performed in different depths (1.2, 2.9, 4.4, 6.6 m) during summer 2014. PAR for the algae collection depths is calculated based on daily Kd values. Daily net primary production (NPP in g C/m² seafloor/day) for each sampling depth is calculated with in situ vertical profiles based on daily Kd, leaf area index (Pehlke and Bartsch, 2008) and a photosynthetic quotient (PQ) of 1.18 (Miller III et al. 2009). For comparative purposes, daily NPP values were also calculated using the measured maximum and minimum daily Kd and the mean Kd, which were derived from all daily Kd over the entire sampling period.
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.958899
title: Photosynthesis versus irradiance curves of Laminaria hyperborea off the island of Helgoland in summer 2014

description: Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) and set into photosynthesis versus irradiance (PI) curves. Incident light was generated by a slide projector (Liesegang Dianfant, Leitz Prado, Germany) equipped with a halogen lamp (Osram Xenophot 400 W/36 V, Germany) and 11 Schott neutral gray filters. Eleven light steps were conducted between 0 and 560 µmol photons m-2 s-1. Dark respiration was measured first for 20 mins followed by increasing light steps in 10 min intervals. Oxygen concentration expressed in % air saturation was logged by the OxyView software (Presens, Regensburg, Germany) and corrected for air pressure, salinity and logged temperature according to Tengberg et al. (2006). During post-processing, the oxygen production rate for each photon flux density (PFD) level was calculated by plotting a linear regression model through all O2-values measured during the time interval, and was normalized to either fresh mass (FM, unit: µmol O2 g–1 h–1) or disc surface area (DA, unit: µmol O2 cm–2 h–1).
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.958761
title: Photosynthetically active radiation measured in different water depths near the island of Helgoland in summer 2014

description: In-situ photosynetically active radiation (PAR) was measured in different depths (1.2, 2.9, 4.4, 6.6 m) every 10-15 min during summer 2014. Odyssey PAR loggers were calibrated against a cosine-corrected planar PAR sensor (LI-190SA quantum sensor, LI-COR Inc., USA) over a 24 h period at 4 m depth in the Helgolandic South harbor. During the Laminaria hyperborea sampling period (seven weeks), incoming PAR was recorded continuously every 15 min at 1.2 and 2.9 m, and every 30 min at 4.4 and 6.6 m near the sampling area of sporophytes. To avoid biofouling of the sensor heads, PAR loggers were cleaned every week (1.2 m) or every second week (all other depths) by SCUBA divers.
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.958896
title: Information on Laminaria hyperborea samples off the island of Helgoland in summer 2014

description: Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Stipe length of the sporophyte was measured. In blade discs from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) dry mass, fresh mass and dry mass:area ratio were measured.
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.958897
title: Chlorophyll a content of Laminaria hyperborea off the island of Helgoland in summer 2014

description: Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Chlorophyll a content was measured. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) and normalized to either dry mass, fresh mass or disc area. The samples were freeze-dried for approximately 36 h (Beta 1–8 LDplus, Christ, Osterode am Harz, Germany), finely ground for several minutes using steel grinding balls (3 mm diameter) in a Mikro-Dismembrator U (Braun Biontech International, Melsungen, Germany), cooled centrifuged (Centrifuge 3K10, Sigma, Osterode, Germany), and measured in the spectrophotometer (U-3310, Hitachi High-Tech, Japan) at two wavelengths (347 and 664.5 nm).
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.903557
title: Primary production rates in giant clam Tridacna maxima under 3 different light regimes
DOI: 10.1594/pangaea.958900
title: Photosynthesis versus irradiance curve parameters of Laminaria hyperborea off the island of Helgoland in summer 2014

description: Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone) and set into photosynthesis versus irradiance (PI) curves. PI curves were fitted by minimizing the sum of differences between the measured oxygen flux and the model proposed by Jassby and Platt (1976). Parameters were normalized to fresh mass and area.
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.958898
title: Maximum quantum yield measured in Laminaria hyperborea off the island of Helgoland in summer 2014

description: Laminaria hyperborea off the island of Helgoland (North Sea, Germany) was sampled along a depth gradient (0.5, 2, 4, 6 m) throughout summer 2014. Discs were cut from three different blade regions (5, 25 and 50 cm above the stipe-blade transition zone). The maximum quantum yield of photosystem II was measured after cutting and after one night of wound healing before oxygen measurements were conducted using pulse-amplitude-modulated fluorometry (PAM 2100, WALZ, Germany).
description: Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.
DOI: 10.1594/pangaea.834985
title: Respiration rate of Microsetella norvegica collected during James Cook cruise JC087

description: Respiration of Microsetella norvegica was measured at PAP site during two days, using a UNISENSE microrespiration system and microelectrodes for O2. 10-20 starved Microsetella individuals were carefully placed into 2-ml respiration chambers in filtered sea water, and their respiration was measured for 20 min. The respiration rate was calculated based on the slope of the decrease in oxygen against time in the respiration chamber containing Microsetella, compared to the control where only filtered seawater was present. In total 18 measurements were conducted.
DOI: 10.1594/pangaea.918173
title: Bulk particle composition and mass flux of sediment trap 13M4
DOI: 10.1594/pangaea.899853
title: Primary production using ¹⁴C method in subtropical gyres regions

description: Seawater was sampled from five depths in the euphotic zone corresponding to 100 % (ca. 3 m depth), 50 %, 20 %, 7 % and 1 % of incident Photosynthetically Active Radiation (PAR). For each depth, four 72 mL polystyrene bottles (three clear bottles and one dark bottle) were filled with unfiltered seawater, inoculated with 10 - 20 µCi NaH¹⁴CO₃ and incubated on-deck from dawn to dusk. Temperature and irradiance in the incubators simulated the water temperature and the incident irradiance at the corresponding depth of each sample by using a combination of neutral density and blue filters (Mist Blue, ref. 061, Lee Filters ®). After incubation, samples from three of the five depths (100 %, 20 % and 1 % PAR) were sequentially filtered through 20, 2 and 0.2 µm polycarbonate filters while the other depths (50 % and 7 % PAR) were directly filtered by 0.2 µm. Immediately after filtering, filters were then exposed to concentrated HCl fumes at least 12 h to remove the non-fixed inorganic ¹⁴C. Filters were placed in scintillation vials to which 5 mL of liquid scintillation cocktail was added. The radioactivity on each filter (disintegrations per minute, DPM) was determined using a Wallac scintillation counter. To compute the rate of photosynthetic carbon fixation, the dark-bottle DPM was subtracted from the light-bottle DPM values. A constant value of 24,720 µg L-1 (or 2,060 µmol L-1) was assumed for the concentration of dissolved inorganic carbon for surface waters in tropical ocean (Key et al., 2004). A correction factor of 1.05 was applied to this constant value for discrimination isotopic. Total primary production was calculated as the sum of the primary production on each size class.
description: Supplement to: Regaudie-de-Gioux, Aurore; Huete-Ortega, Maria; Sobrino, Cristina; López-Sandoval, Daffne C; González, N; Fernández-Carrera, Ana; Vidal, Montserrat; Marañón, Emilio; Cermeño, Pedro; Latasa, Mikel; Agustí, Susana; Duarte, Carlos Manuel (2019): Multi-model remote sensing assessment of primary production in the subtropical gyres. Journal of Marine Systems, 196, 97-106
DOI: 10.1594/pangaea.918156
title: Satellite-derived data for site 13M5
DOI: 10.1594/pangaea.907951
title: Sea floor bathymetry under Ekström Ice Shelf, Antarctica, from a compilation of seismic vibroseis data

description: A gridded bathymetry of the sea floor under Ekström Ice Shelf, Antarctica. The seismic data used to map the bathymetry were collected between 2010 and 2018, using two different seismic vibroseis sources. The same snow streamer was used for all data acquisition - a 1500 m long, 60 channel snow streamer, with 25 m group spacing. Each group contains eight gimballed P-wave SM-4, 14 Hz geo-phones. For each seismic profile, the reflection time of the sea floor horizon was identified. The data across all profiles was gridded and depth converted, using an ice velocity of 3601 m/s a sea-water velocity of 1451 m/s.
DOI: 10.1594/pangaea.899842
title: Photosynthetic parameters TRANSSIZ mission

description: Photosynthetic parameters for the TRANSSIZ expedition aboard the RV Polarstern (PS92, ARK-XXIX/1) between the 19th of May and the 26th June of 2015.
DOI: 10.1594/pangaea.922417
title: Raw dissolved gas measurements from 2014-2017 at individual depths in the NE subarctic Pacific
DOI: 10.1594/pangaea.922462
title: Raw dissolved gas measurements from 2007-2009 at individual depths in the NE subarctic Pacific
DOI: 10.1594/pangaea.922414
title: Raw incubation data from 2014-2017 for samples collected at specific depths and light levels in the NE subarctic Pacific
DOI: 10.1594/pangaea.922421
title: Productivity rates from 2014-2017 integrated to either the mixed layer or the euphotic depth in the NE subarctic Pacific
DOI: 10.1594/pangaea.903559
title: Depth-dependent abundance of Tridacna maxima giant clams at station 2 in the Central Red Sea
DOI: 10.1594/pangaea.918155
title: Satellite-derived data for site 13M4
DOI: 10.1594/pangaea.922446
title: Productivity rates from 2007-2009 integrated to either the mixed layer or the euphotic depth in the NE subarctic Pacific