cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.980748
title: Water column raw data (Wärtsilä ELAC 3050 MK II entire dataset) of RV ALKOR during cruise AL575

description: Raw water column data were collected aboard RV ALKOR during cruise AL575 using a 50kHz Elac Seabeam 3050 (SB3050 MKII) multibeam echosounder by ELAC Nautic. This system had been installed originally on the former RV POSEIDON and was transferred to RV ALKOR just before this cruise. During AL575 it was mainly used it to acquire water column data for online gas seep detection. Water column and side scan data are stored in .wci & .raw format; bathymetry and backscatter data are stored as .xse. .xse data can either be read directly in MBSystem, Hypack or Qimera post-processing software or they can be converted to .hsx (Caris readable). The expedition took place during 2022-06-28 – 2022-07-13 from Kiel to Kiel (Germany) in the North Sea. The major aim of AL575 - GEOSTOR leak are to investigate and contribute to the assessment of the mechanisms and potential risks of CO2 leakage along boreholes drilled through the sedimentary overburden above subseafloor storage formations in the North Sea. Data were recorded in the EEZs of UK and Germany. Sound velocity profiles (SVP) were applied on the data for calibration. Please see the cruise report for details. The data are unprocessed and can therefore contain incorrect measurements (artifacts) if not further processed. Note that refraction errors may occur when no proper SVP is applied. Data acquisition and provision was done by GEOMAR and they are published according to the FAIR principles.
DOI: 10.1594/pangaea.984346
title: Meteorological data from West Africa (Benin)

description: Daily and daytime meteorological data measured by the AMMA-CATCH observatory at Belefoungou (BE, Benin, Nalohou (NA, Benin). Gaps were filled using linear regression obtained from the record of the nearest AMMA-CATCH sensor. In the absence of a nearby record (e.g. at DA), gaps were filled by linear or spline interpolation over time on a moving average of the variable to be filled, to restore temporal dynamics.
DOI: 10.1594/pangaea.984347
title: Phytolith production-weighed meteorological averages from West Africa (Benin and Senegal)

description: Daily and daytime meteorological averages calculated for the sampled years and rainy seasons at Belefoungou (BE, Benin, Nalohou (NA, Benin) and Dahra (DA, Senegal) from 2018 to 2021.
DOI: 10.1594/pangaea.984348
title: Precipitation isotopes from West Africa (Benin and Senegal)

description: Triple oxygen isotope composition of precipitation events collected at Nalohou (NA, Benin) and Dahra (DA, Senegal) in 2018 and 2019. The water was analyzed by Cavity Ring Dow Spectroscopy (CRDS). Annual averages weighted for precipitation amount are presented.
DOI: 10.1594/pangaea.984859
title: Meteorological data from West Africa (Senegal)

description: Daily and daytime meteorological data measured by the AMMA-CATCH observatory at Dahra (DA, Senegal). Gaps were filled using linear regression obtained from the record of the nearest AMMA-CATCH sensor. In the absence of a nearby record (e.g. at DA), gaps were filled by linear or spline interpolation over time on a moving average of the variable to be filled, to restore temporal dynamics.
DOI: 10.1594/pangaea.984875
title: Soil water isotopes - extraction comparison

description: Triple oxygen and hydrogen isotope compositions of soil water from two cores sampled in Nalohou, Benin (loamy soil core NA-19-05-19) and Dahra, Senegal (sandy soil core DA-24-08-19). The soil waters were extracted by centrifugation and by cryogenic distillation, and analyzed by Cavity Ring Dow Spectroscopy (CRDS). The data have been used to compare the extraction technics.
DOI: 10.1594/pangaea.986612
title: Soil water isotopes from West Africa (Benin and Senegal)

description: Isotopic composition of soil water extracted by centrifugation and analyzed by Cavity Ring Dow Spectroscopy (CRDS) from 10 soil cores collected at Belefoungou (BE, Benin), Nalohou (NA, Benin) and Dahra (DA, Senegal). For comparison, the isotopic composition of precipitation preceding the samplings are shown.
description: Soils and plants were collected in 4m2 fenced sampling plots a few meters from the meteorological stations
DOI: 10.1594/pangaea.986639
title: Plant water isotopes from West Africa (Benin and Senegal)

description: Observed and predicted triple oxygen isotope composition of water extracted from leaf, stem and wood samples collected at Belefoungou (BE, Benin), Nalohou (NA, Benin) and Dahra (DA, Senegal) at midday (12 to 14 H UTC). Water was analyzed by Isotope Ratio Mass Spectrometry (IRMS) after cryogenic distillation. Relative humidity, air temperature, and triple oxygen isotope composition of precipitation preceding the sampling are considered in the Craig and Gordon (Craig and Gordon, 1965) evaporation model + mixing equation (Cernuzak et al., 2016; Alexandre et al., 2018; 2019 and Outrequin et al., 2021).
description: Soils and plants were collected in 4m2 fenced sampling plots a few meters from the meteorological stations
DOI: 10.1594/pangaea.986640
title: Phytolith isotopes from West Africa (Benin and Senegal)

description: Triple oxygen isotope composition of phytoliths extracted from grass stems and leaves collected at Belefoungou (BE, Benin), Nalohou (NA, Benin) and Dahra (DA, Senegal). Descriptors of the grass samples and phytolith concentration are presented. Atmospheric relative humidity and air temperature averages are calculated for the grass growing season. Phytolith-water fractionation coefficients are calculated for stem phytoliths. Observed and predicted values (using fractionation values from Dodd and Sharp, 2011 and Outrequin et al., 2021) can be compared.
description: Soils and plants were collected in 4m2 fenced sampling plots a few meters from the meteorological stations
DOI: 10.60502/soildata/4dbu9d
title: Levantamento semidetalhado de solos do Município de Bela Vista do Paraíso - PR

description: Dados de identificação e caracterização dos solos do municipio de Bela Vista do Paraíso, utilizados para o seu mapeamento na escala 1:50.000 (levantamento semidetalhado). As observações do solo foram obtidas pela prospecção das diferentes unidades fisiográficas delimitadas após a interpretação de material básico, procurando-se atender às distribuições pedossequenciais. Os perfis do solo foram examinados em barrancos, microtrincheiras e tradagens, sendo descritos conforme Santos et al. (2005), a maioria dos quais foram georeferrenciados usando GPS de navegação. Amostras do solo foram coletadas apenas para os horizontes superficial e subsuperficial, para as quais foram determinadas algumas propriedades mosfológicas, físicas e químicas básicas necessárias para a sua classificação taxonômica.
DOI: 10.1594/pangaea.986641
title: Predicted soil water isotopes from West Africa (Benin and Senegal) using Craig and Gordon evaporation model and a mixing equation

description: Simple evaporation model applied to a layer of soil water defined as an isolated volume of water (cf Criss, 1999, Surma et al., 2015 and Voigt et al., 2021 for definition of the parameters). The isotope composition of the initial water considered is that of the main precipitation preceding the coring. Atmospheric relative humidity and air temperature considered are the diurnal averages (for the period from August 18 to August 24, 2019 at DA). Pure molecular diffusion (wind coefficient of 1) is assumed.
DOI: 10.1594/pangaea.987126
title: Methane concentration and diffusive flux in the Northern Sea off Heligoland in 2023

description: As part of the MOSES Project, in April 2023 methane measurements were started in the north-western part of the island Heligoland in the German Bight (North Sea). The objective was to complement the measurements of the "Sternfahrten" to identify the carbon cycle and its flow from the start of the Elbe river into the North Sea. Therefore, a Contros methane sensor for dissolved methane was deployed under water at about 10 to 12 meter depth (depending on the tide) close to the underwater observatory (UW-OBS) MarGate (54°11' N, 7°52' E), from the COSYNA Project. To ensure correct values latter was cleaned frequently from growing organisms by scientific divers. The present data contains the data from 2023, the first year running the sensors. Based on the concentrations of dissolved methane the methane emissions (diffusive flux) was calculated.
description: After the underwater methane sensor was retrieved it was calibrated by the company (4HJena). Thereby a drift from 0.3 ppm was detected and corrected. For the following calculations only values were used when the power of the sensor integrated pump was between two and eight watt.For the calculation of the methane concentration, first the solubility of the methane was determined (Guinasso et al., 1979). This was based on corresponding temperature and salinity data from specific sensors also deployed in the UW-OBS MarGate at this time. Afterwards the concentration was calculated according to the manufacturers' specifications.For the calculation of the methane flux, atmospheric methane concentration and wind data were taken from the ICOS station. Since the MarGate field is protected from the west side by the island, in case of westerly wind the following corrections were made:• direction 140° - 240°, wind force multiplied by factor 0.5• direction 241° - 280°, wind force multiplied by factor 0.7Those values were applied to the Nightingale formula calculating the diffusive flux for the year 2023.For more information about the used data and bibliography see additional metadata.
DOI: 10.1594/pangaea.987329
title: Particulate geochemistry of sediment core AL561_2-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987330
title: Particulate geochemistry of sediment core AL561_5-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987331
title: Particulate geochemistry of sediment core AL561_7-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987332
title: Particulate geochemistry of sediment core AL561_11-2

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987333
title: Particulate geochemistry of sediment core AL561_12-4

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987334
title: Particulate geochemistry of sediment core AL561_15-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987335
title: Particulate geochemistry of sediment core AL561_16-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987336
title: Particulate geochemistry of sediment core AL561_17-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987337
title: Particulate geochemistry of sediment core AL561_19-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.
DOI: 10.1594/pangaea.987338
title: Particulate geochemistry of sediment core AL561_20-1

description: The AL561 cruise was conducted in the framework of the project APOC ("Anthropogenic impacts on Particulate Organic Carbon cycling in the North Sea"). This collaborative project between GEOMAR, AWI, HEREON, UHH, and BUND is to understand how particulate organic carbon (POC) cycling contributes to carbon sequestration in the North Sea and how this ecosystem service is compromised and interlinked with global change and a range of human pressures include fisheries (pelagic fisheries, bottom trawling), resource extraction (sand mining), sediment management (dredging and disposal of dredged sediments) and eutrophication. The main aim of the sampling activity during AL561 cruise was to recover undisturbed sediment from high accumulation sites in the Skagerrak/Kattegat and to subsample sediment/porewater at high resolution in order to investigate sedimentation transport processes, origin of sediment/POC and mineralization processes over the last 100- 200 years. Moreover, the actual processes of sedimentation and POC degradation in the water column and benthic layer will be addressed by sampling with CTD and Lander devices. In total 9 hydroacoustic surveys (59 profiles), 4 Gravity Corer, 7 Multicorer, 3 BIGO Lander and 3 CTD stations were successfully conducted during the AL561 cruise.