cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.955991
title: Nitrous oxide measurements in the Benguela Upwelling System during METEOR cruise M157

description: Upwelling systems are significant sources of atmospheric nitrous oxide (N₂O). The Benguela Upwelling System is one of the most productive regions worldwide and a temporally variable source of N₂O. Strong O₂ depletions above the shelf are favoring periodically OMZ formations. We aimed to assess underlying N₂O production and consumption processes on different temporal and spatial scales during austral winter in the Benguela Upwelling System, when O₂⁻deficiency in the water column is relatively low.The fieldwork took place during the cruise M157 (August 4ᵗʰ – September 16ᵗʰ 2019) onboard the R/V METEOR. This expedition included four close-coastal regions around Walvis Bay at 23°S, which presented the lowest O₂ concentrations near the seafloor and thus may provide hotspots of N₂O production. Seawater was collected in 10 L free-flow bottles by using a rosette system equipped with conductivity-temperature-depth (CTD) sensors (SBE 911plus, Seabird-electronics, USA).Seawater samples were collected from 10 L free-flow bottles bubble-free, filled into 200 mL serum bottles and immediately fixed with saturated mercury chloride (HgCl₂). Concentrations of dissolved N₂O were measured by a purge and trap system using a dynamic headspace (Sabbaghzadeh et al., 2021). The N₂O gas saturation (N₂Oₛₐₜ in %) was calculated from the concentration ratio between the seawater sample and seawater equilibrated with the atmosphere. ∆N₂O (N₂O saturation disequilibrium in nmol L⁻¹) was calculated as the difference between the measured N₂O concentration and the atmospheric equilibrium N₂O concentration using Bunsen solubility coefficient (Weiss and Price, 1980). AOU (apparent oxygen utilization in µmol L⁻¹) expresses the O₂ consumption by microbial respiration and was calculated as the difference between the equilibrated O₂ and observed O₂ concentration with the same physico-chemical properties (Weiss and Price, 1980).
DOI: 10.1594/pangaea.961794
title: Vector dataset of manually mapped retrogressive thaw slumps from very high-resolution multispectral imagery in the Russian High Arctic between 2011 and 2020

description: We present a comprehensive inventory of retrogressive thaw slumps (RTS) for six study sites in the Russian High Arctic covering an area of more than 600 km². The sites are located on the Novaya Zemlya Archipelago, Kolguev Island, Bol'shoy Lyakhovsky Island, and Taymyr Peninsula in ice-rich permafrost characterized by either buried glacial ice or syngenetically formed Yedoma permafrost deposits. This data publication contains geospatial polygon vector files of the individual mapped slumps across multiple time slices. The mapping was performed on multispectral imagery of very high-resolution satellite sensors, including PlanetScope (3m ground resolution), RapidEye (5m), Pléiades (0.5m), and SPOT (1.5m). Cloud free images were acquired between 2011 and 2020 and exist for annual or close-to-annual time steps depending on their availability. Additional data sets such as the ArcticDEM, the Esri Satellite base map, and Tasseled Cap Landsat Trends were used to support the mapping process. The identification and digitization of thaw slumps as polygons (in UTM coordinate reference system) was performed in QGIS 10.3. A total number of 3466 individual RTS were mapped between 2011 or 2013 and 2020. In addition, for the coastal slumps, change distances from headwalls and bluff bases were calculated in ArcMap 10.5 using the Digital Shoreline Analysis System (DSAS) tool version 5 over the study period (2011/2013-2020).Very high-resolution imagery for this study was kindly provided by ESA through Third Party Mission proposal TPM4-ID-54054. We recieved access to the RapidEye imagery via the RapidEye Science Archive (RESA) initiative in the scope of our project 'Thaw Dynamics of Retrogressive Thaw Slumps from High Resolution Images in Siberia (RTStrendr )'. The PlanetScope imagery was recieved in the scope of our project ' Artificial Intelligence for Cold Regions (AI-CORE)'.
description: Vector format: ESRI shapefileVector type: polygon, polylineProjection: WGS_1984_UTM, Zones: 54N, 39N, 49N, and 45NParameters: Polygons: attributes: id, area_m², year, image_ids, sensor, sp_res_m, date_, layer, authorPolylines: line_ID, DSAS_date, line_Leng, authorTransects: TransectID, Azimuth, TCD, SHAPE_Leng, NSM, EPR
DOI: 10.1594/pangaea.962929
title: Sub-decadal diatom oxygen isotope record of the last 220 years (2015-1790CE) of sediment short core EN18232-1 from Lake Khamra, SW Yakutia, Siberia, Russia

description: The dataset includes diatom oxygen isotope data for 39 samples from short core EN18232-1, Lake Khamra, and corresponding key geochemical characteristics of the purified lake sediment samples based on Energy-Dispersive X-ray Spectroscopy (EDS) measurements. For each sample (Sample ID) the corresponding core depth (Depth sed top/bottom) and the calculated mean age (Age) are given. EDS measurements were carried out by a JEOL M-IT500HR analytical scanning electron microscope (SEM) with an integrated EDS-system supplied with a Peltier element cooled SD detector (SDD) at AWI Potsdam. The standardless procedure was used according to Chapligin et al. (2012), including 6 repetitions, acceleration voltage of 20.0 kV, magnification of 300 and a measuring time of 30 seconds. All detectable elements are normalized to 100% weight. Elements are given as oxides with weight percentages (in %) and summed up to the total sum (total %) of each sample. The diatom oxygen isotope data was generated in the ISOLAB Facility at AWI Potsdam with a semi-automated laserfluorination line (Chapligin et al., 2010) in combination with a SERCON HS2022 mass spectrometer (https://hdl.handle.net/10013/sensor.4880f572-3c55-4e3e-a2e7-485d9bfa06b2). All δ18Odiatom values are given in per mill (‰) vs. Vienna Standard Mean Ocean Water (VSMOW). The dataset includes the mean of measured δ18Odiatom values (Diatom δ18O mean), the standard deviation (Diatom δ18O std dev) and number of replicates (Repl), as well as the calculated contamination (Contamination in %) and the δ18Odiatom corrected for contamination (Diatom δ18O corrected). Details of the contamination correction and isotope analytics are given in Stieg et al. (2024).
description: To compute the age-depth model a Bayesian accumulation model within the R package 'rbacon' v2.5.8 (Blaauw and Christen (2011); R version 4.1.1) was used based on the 210Pb chronology.
DOI: 10.1594/pangaea.904567
title: Trace element ratios of offshore Porites coral from Montebello Islands (2003-2014)

description: Preliminary ages were assigned to sample datasets by assigning seasonal trace element ratios minima and maxima in datasets to warmest and coolest months in satellite SST records and then linearly interpolating in-between
DOI: 10.1594/pangaea.961274
title: Porewater nutrients in sediment cores from the Amazon shelf obtained in April/May 2021 during RV METEOR cruise M174

description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture, and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (https://doi.org/10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, a MUC was deployed at eight stations to collect short sediment cores, in order to explore the influence of the river on sediments. This dataset presents the results of porewater nutrients collected with rhizons and measured on board with an autoanalyzer (Quaatro seal analytics).
DOI: 10.1594/pangaea.903131
title: Pigments in Laminaria solidungula and Saccharina latissima from Kongsfjorden, Spitsbergen, during the polar night 2016/17
DOI: 10.1594/pangaea.961275
title: Nutrient fluxes at the sediment-water interface in the Amazon shelf obtained in April/May 2021 during RV METEOR cruise M174

description: The Amazon River is known as a region of intense biochemical reactivity. As a result of increased anthropogenic impacts in its catchment (e.g. population growth, agriculture and deforestation), The Amazon River is undergoing fundamental changes. The RV METEOR cruise M174 (https://doi.org/10.1594/PANGAEA.935041) aimed to provide an integrated overview of nitrogen cycling processes in areas influenced by the Amazon River, which is crucial to estimate the ecosystem's health and productivity. During this cruise, a MUC was deployed at eight stations to collect short sediment cores, in order to explore the influence of the river on sediments. This dataset presents the results of nutrient fluxes at the sediment-water interface measured via incubation experiments.
DOI: 10.1594/pangaea.926929
title: Experiment on pipefish Syngnathus typhle: juvenile mortality- infection experiment

description: Ten days post-hatch, juveniles received one of the four following infection treatments: (i) no injection – control (c), (ii) sham injection of autoclaved seawater (sw) with the equivalent salinity, i.e., 15 or 7 PSU, (iii) injection of Vibrio alginolyticus strain K01M1, which evolved for 90 days under laboratory condition at 15 PSU (v15) or (iv) Vibrio alginolyticus strain K01M1 that had evolved for 90 days under laboratory condition at 7 PSU (v7). One day after the injection, one juvenile was removed and used for the measurment of targeted gene expression. The size of this individual is listed in the dataset as well as the number of juvenile pipefish alive or dead (cummulative) for each treatment, replicate and timepoint of the survival experiment.
DOI: 10.1594/pangaea.961785
title: Measurements of An Autonomous Flow through Salinity and Temperature Perturbation Mesocosm System for a Multi-stressor Experiment

description: An ex situ experimental mesocosm system was employed to test the effects of climate change drivers temperature, salinity, and reduced light on Arctic kelp communities in Ny-Ålesund, Svalbard from 03/07/2021 –26/08/2021. Three experimental conditions (with 3x replicates) manipulating temperature and salinity as offset values from a dynamic real-time control condition were used to increase temperature on the order of +3.3 and +5.3 °C, freshening by a decrease of ~ 4 and ~ 5 in salinity, along with a static irradiance attenuation at 30 and 50 %. In each mesocosm, oxygen (% O2, temperature, salinity, and flow rate were monitored minutely for 2 months using in situ optical and conductivity sensors paired with flow meters plumbed to the incoming water line. Data were logged on a microSD card. The collected environmental temperature and salinity data were paired with O2 concentration measured during closed incubations which occurred weekly over the experimental period to assess the effects on kelp community metabolism.
DOI: 10.1594/pangaea.907602
title: Ancillary data for grassland monoliths subjected to an experimental drought in a Alpine region
DOI: 10.1594/pangaea.962978
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded during an urban measurement campaign in Munich in August 2018 - source files

description: The files contain concentration data (column-averaged dry-air mole fractions) of carbon dioxide, methane and carbon monoxide. Additional parameters such as time, location (longitude, latitude and altitude), air pressure, etc. are also included.The files contain daily data from 5 places in Munich. They have been used as source files for following relational datasets:- ki...: doi:10.1594/PANGAEA.963115, Hoehenkirchen (Munich South)- kj...: doi:10.1594/PANGAEA.963224, Markt Schwaben (Munich East)- ma...: doi:10.1594/PANGAEA.963225, Garching (Munich North)- mb...: doi:10.1594/PANGAEA.963226, Munich city center- wa...: doi:10.1594/PANGAEA.963227, Wessling (Munich West)
DOI: 10.1594/pangaea.947543
title: Pelagic and ice-associated microalgae under elevated light and pCO2: Contrasting physiological strategies in two Arctic diatoms

description: Laboratory experiment on acclimated physiological responses of the Arctic diatoms Thalassiosira hyalina and Melosira arctica towards elevated irradiance (50 vs 300 µmol photons m-2 s-1) and CO2 partial pressures (380 vs. 1000 μatm). Next to growth, elemental composition and biomass production, we assessed detailed photophysiological responses through fluorometry and gas-flux measurements, including respiration and carbon acquisition. Both algal cultures were isolated from the field within 2 years before the experiment, T.hyalina in Kongsjorden, Svalbard, and M.arctica in the Fram Strait close to Svalbard.
DOI: 10.1594/pangaea.963115
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded in August 2018 in Hoehenkirchen (Munich South)

description: Source files including further details are given in dataset doi:10.1594/PANGAEA.962978, see file names starting with "ki".
DOI: 10.1594/pangaea.963224
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded in August 2018 in Markt Schwaben (Munich East)

description: Source files including further details are given in dataset doi:10.1594/PANGAEA.962978, see file names starting with "kj".
DOI: 10.1594/pangaea.963227
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded in August 2018 in Wessling (Munich West)

description: Source files including further details are given in dataset doi:10.1594/PANGAEA.962978, see file names starting with "wa".
DOI: 10.1594/pangaea.964207
title: XRF data for the OAE2 strata in the Omagari-zawa section
DOI: 10.15468/dl.b4rmnh
title: Occurrence Download

description: A dataset containing 24 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Amolops minutus"
 ]
}

 The dataset includes 24 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0030945-260208012135463/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.964085
title: Holocene total nitrous oxide flux based on the composite nitrous oxide concentration data

description: The N2O emissions were estimated by calculating the change in total N2O flux. The total N2O global flux (TgN/yr) was calculated by clubbing the new SPICE core N2O data (Azharuddin et al, 2023) with the existing data from EPICA Dome C (EDC), Dronning Maud Land (EDML) (Flückiger et al., 2002; Schilt et al., 2010), Talos Dome Ice (TALDICE), North Greenland Ice Core Project (NGRIP) (Fischer et al., 2019), Law Dome (Rubino et al., 2019) and Styx and NEEM (Ryu et al., 2020) ice cores using a two-box model. The model assumed the stratosphere and troposphere as individual boxes where the stratospheric N2O destruction and troposphere-stratosphere N2O exchange were well constrained.
DOI: 10.1594/pangaea.961688
title: Assessment and measurement of Wilson's Storm Petrels chicks (Oceanites oceanicus) at King George Island

description: This data set describes the population dynamics of Wilson's Storm Petrels (Oceanites oceanicus) at King George Island (Islas 25 de Mayo, Antarctica) over a forty year period (1978 – 2020). It includes all available data on Wilson's Storm Petrels from two colonies: around the Argentinian Base Carlini (62°14′S, 58°40′W; CA, formerly called Base Jubany) and the Henryk Arctowski Polish Antarctic Station (62°09′S, 58°27′W; HA). Chicks were measured regularly (varying intervals depending on the study) at both CA and HA. Chick tarsus was measured using callipers (vernier or digital depending on the study year) to the nearest 0.1 mm, chick wing length was measured using wing rulers to the nearest 1 mm, and chick body mass was measured using mechanical or digital scales depending on the study year to the nearest 0.1 g. Chick growth rates were calculated based on the linear growth period following Ausems et al. (2020, doi:10.1016/j.scitotenv.2020.138768). Chick food loads (g) were recorded at CA and determined based on changes in chick body mass on consecutive days (Gladbach et al. (2009, doi:10.1007/s00300-009-0628-z); Kuepper et al. (2018, doi:10.1016/j.cbpa.2018.06.018).
description: This study was further supported by the Erasmus+ programm and thee German Academic Exchange Service (DAAD)
DOI: 10.1594/pangaea.897936
title: Kiel Indoor Benthocosms: applied temperature profiles (Figure 3)
DOI: 10.1594/pangaea.964588
title: Total Petroleum Hydrocarbons, Heavy Metals and Nutrients in a monthly time series collected at different ecosystems of the Niger Delta, Africa

description: This dataset was created to provide an overview on the seasonal dynamics of contaminants in the Niger Delta Africa and their relationship to parameters that are likely be affected by future climatic changes. Therfore surface water samples were collected monthly from the three major ecosystem types of the Niger Delta, the Bonny estuary, the Imo river and the Lagos lagoon in the year 2021 (January to December). We sampled 3-4 stations at each of the sites, representing upper, middle, lower reaches16 (&gt; 5 km apart). We determined analytically the concentrations of total petroleum hydrocarbons (TPHs) and heavy metals (HMs: Mn, Al, Co, B, Zn, Cr, Cu, Ni, Pb, Cd, Hg) , measured in µg/L. Other abiotic parameters such as temperature (°C), salinity (ppt), conductivity (mS/cm), DO (mg/L), TDS (mg/L), pH, were measured in-situ using a Horiba U–52 Multi-parameter meter, while, nutrients PO43- (mg/L), NO3- (mg/L), NH4+ (mg/L), and SO42- (mg/L), turbidity (NTU)) were determined using established standard methods.
DOI: 10.1594/pangaea.918958
title: Abundance data from soil macro-invertebrates along a subalpine land-use transect

description: Here we present abundance data as individuals per m² of soil macro-invertebrates from Alpine habitats of different management techniques. In detail, we took 144 soil monoliths from four different land-use types: (1) grazed dry pastures, (2) intensively used hay meadows, (3) larch and (4) spruce forests. All sites were comparable concerning bedrock and exposition. Additionally, we measured pH, organic matter content, C- and N-content, as well as soil temperature and soil moisture. We found the highest abundances on the intensively used hay meadows, followed by the larch forests, the spruce forests, and the dry pastures. Diptera larvae and Lumbricidae were predominant in hay meadows, while in larch forests we found the highest number of Coleoptera larvae, Araneae and Symphyla. In comparison to the other land-use types the dry pastures harbored most Gastropoda individuals, no special taxa were observed in the spruce forests. At species level, the larch forests had the highest biodiversity with 73 species 73, followed by the hay meadows with 44 species, the spruce forest with 42 species and the dry pasture with 36 species. Despite showing a lower biodiversity, we found more rare and specialist species in the extensive dry pastures compared to the more generalist species assemblages in the other habitats, supporting the high conservational value of extensively managed Alpine landscapes, which are currently threatened by environmental and socio-economic changes such as the cessation of traditional cultivation, but also climate change are influencing mountain ecosystems.
DOI: 10.1594/pangaea.964208
title: Degree of pyritization data for the OAE2 strata in the Omagari-zawa section
DOI: 10.1594/pangaea.964209
title: Clay mineral analysis data for the OAE2 strata in the Omagari-zawa section
DOI: 10.1594/pangaea.964210
title: Biomarker (AGI) data for the OAE2 strata in the Omagari-zawa section. Angiosperm/Gymnosperm index (AGI) is calculated as the aromatic triterpenoid/diterpenoid ratio
DOI: 10.1594/pangaea.904622
title: In situ sea surface temperature from West Reef (2010-2017)

description: SST data was collected by loggers deployed at the reef sites (sampling rates of 1 per 15 - 30 mins). The data was then down sampled to monthly resolution to verify the precision and accuracy of satellite records that were collected from each of the reef sites.
DOI: 10.1594/pangaea.959614
title: Survival, growth and water content of marine invertebrates exposed to low salinity in the laboratory

description: Laboratory experiments were conducted in the climate chambers at GEOMAR Helmholtz Centre for Ocean Research Kiel in the time between March and November 2018. Experiments were designed to study the effect of long-term (1 month) exposure to low salinity in osmoconforming invertebrates. The study organisms (Asterias rubens, Mytilus edulis, Littorina littorea, Diadumene lineata, Strongylocentrotus droebachiensis and Psammechinus milliaris) were collected in Kiel Fjord, Eckernförder Bight or the Kattegat from spring to autumn 2018. Organisms were acclimated to climate chamber conditions for 1 week (under habitat salinity, 14˚C, constant aeration) and then subjected to salinity acclimation for 1-2 weeks until the final salinity treatment level was reached. Then different salinity treatments were maintained for 4 weeks. Water physiochemistry (temperature, salinity, pH, nitrite, nitrate, phosphate) was recorded frequently. Throughout the experiment survival was recorded. Before and after the experiment organism weight and, where feasible, size was measured. Weight data was also used to calculate tissue water content. This dataset comprises the physiological fitness parameters for each species at the respective salinity treatment. Given are data for survival, growth and tissue water content.
DOI: 10.1594/pangaea.933228
title: Oxygen isotope composition of diatoms from Lake Emanda (northeastern Siberia, Russia)

description: The sedimentary sequence of core Co1412 from Lake Emanda (65°17′N; 135°45′E; 671 m a.s.l) has been retrieved in August 2017 using gravity and percussion piston corers (UWITEC Ltd., Austria) and investigated within the German-Russian 'Paleolimnological Transect' (PLOT) project. Well preserved diatoms occur only in the upper 125-cm interval of a 6.1-m sediment core covering the last 13.2 cal. ka BP. Diatoms were purified to &gt;98% SiO₂ and &lt;0.8% Al₂O₃ suitable for oxygen isotope analysis. The δ¹⁸O diatom values were corrected for contamination and range between +22.5‰ and +27.8‰. A new dataset on diatom oxygen isotope composition provides insights into the climate and environmental dynamics in an extreme continental setting in northeastern Siberia. The δ¹⁸O diatom record reveals an obvious shift of 2‰ in the δ¹⁸O diatom record at 11.7−11.5 cal. ka BP reflecting the onset of the Holocene. Relatively high δ¹⁸O diatom during the Early Holocene suggests relatively warm and/or dry climate with associated evaporation effects. The absolute maximum in δ¹⁸O diatom of +27.7‰ consistent with high values of diatom indices at 7.9−7.0 cal. ka BP suggests a Mid Holocene Thermal Maximum. A continuous depletion in δ¹⁸O diatom since ~5.0 cal. ka BP is interpreted as Middle to Late Holocene cooling reaching the absolute minimum at 0.4 cal. ka BP (i.e. the Little Ice Age).
DOI: 10.1594/pangaea.963225
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded in August 2018 in Garching (Munich North)

description: Source files including further details are given in dataset doi:10.1594/PANGAEA.962978, see file names starting with "ma".
DOI: 10.1594/pangaea.904618
title: In situ sea surface temperature from Bundegi Reef (2010-2017)

description: SST data was collected by loggers deployed at the reef sites (sampling rates of 1 per 15 - 30 mins). The data was then down sampled to monthly resolution to verify the precision and accuracy of satellite records that were collected from each of the reef sites.
DOI: 10.1594/pangaea.963226
title: Column-averaged dry-air mole fractions of CO2, CH4 and CO recorded in August 2018 in Munich city center

description: Source files including further details are given in dataset doi:10.1594/PANGAEA.962978, see file names starting with "mb".