cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.983188
title: Soil- moisture and temperature from the PhytOakmeter plot DKr (Kreinitz, Germany) from 2024

description: As part of PhytOakmeter (www.phytoakmeter.de), time-domain transmission, soil moisture and -temperature sensors with custom-made logger systems were used to measure time series of soil state variables. The aim of these investigations was to provide data on environmental properties used in a cross-disciplinary approach.The measurement device consisted of two sensors at three different depths. The dataset contains the values of time (UTC), relative permittivity, soil moisture (in % vol) derived from permittivity and soil temperature (in °C). Determination of soil moisture was done using the formula of Topp et al. (1980). As sensors, the SMT100 soil moisture sensors with integrated temperature measurement were used. All sensors were installed within the upper 50cm below ground. The exact depths for each sensor are listed in the dataset and parameter comment.
description: Depths of sensors: 1+2 = 15cm / 3+4 = 25cm / 5+6 = 45cm
DOI: 10.1594/pangaea.983207
title: Soil- moisture and temperature from the PhytOakmeter plot DKr (Kreinitz, Germany) from 2025

description: As part of PhytOakmeter (www.phytoakmeter.de), time-domain transmission, soil moisture and -temperature sensors with custom-made logger systems were used to measure time series of soil state variables. The aim of these investigations was to provide data on environmental properties used in a cross-disciplinary approach.The measurement device consisted of two sensors at three different depths. The dataset contains the values of time (UTC), relative permittivity, soil moisture (in % vol) derived from permittivity and soil temperature (in °C). Determination of soil moisture was done using the formula of Topp et al. (1980). As sensors, the SMT100 soil moisture sensors with integrated temperature measurement were used. All sensors were installed within the upper 50cm below ground. The exact depths for each sensor are listed in the dataset and parameter comment.
description: Depths of sensors: 1+2 = 15cm / 3+4 = 25cm / 5+6 = 45cm
DOI: 10.1594/pangaea.983639
title: Soil physicochemical properties of the PhytOakmeter plot DKr (Kreinitz, Germany) since 2014

description: As part of PhytOakmeter platform (www.phytoakmeter.de), soil chemical parameters were determined each year between 2014 and 2024. Soil pH was measured using a glass electrode in a 1:2.5 soil-to-0.01 M CaCl2 suspension after one hour of equilibration. Gravimetric soil moisture was assessed with a fully automated moisture analyzer (DBS60-3, KERN & SOHN GmbH, Balingen, Germany), here defined as soil moisture (MOI). Total nitrogen (TN) and total carbon (TC) contents in the soil were analyzed in triplicate through dry combustion using a Vario elemental analyzer (EL III, Elementar, Hanau, Germany), and the carbon-to-nitrogen ratio (TC/TN) was subsequently calculated from these values. To evaluate the potentially bioavailable soil organic carbon and nitrogen for microbial activity, hot water-extractable carbon and nitrogen (HWC and HWN, respectively) were determined following the methods of Ghani et al. (2003) and Schulz et al. (2011). Additionally, the labile organic carbon and nitrogen easily decomposable by soil microorganisms were measured as cold water-extractable carbon (CWC) and nitrogen (CWN) based on procedures described by Zsolnay (1996), Zakharova et al. (2015), and Schmidt et al. (2017). Ammonium and nitrate (NH4±N and NO3—N, respectively) were quantified, with their sum representing the total mineral nitrogen content (Nmin).
DOI: 10.1594/pangaea.972733
title: Eleven years of Mean Annual Ground Temperatures across depths from eastern and central Siberia (2008-2018)

description: Ground temperature (GT) data have been collected by A. Kholodov for the Thermal State of Permafrost (TSP)/Global Terrestrial Network for Permafrost (GTN‐P) programme at 12 sites in Siberia, with a main focus in eastern Siberian Kolyma Lowlands (9 Sites). Two sites are located on the Bykovsky peinsula in the Arctic at the Eastern outflow of the Lena River Delta, and in Central Yakutia North of the city of Yakutsk. Field work, station installation and data read-out and the processing to specific temporal averages has been conducted by Alexander Kholodov and Vladimir Romanovsky. The data presented here are the Mean Annual Ground Temperatures (MAGT), calculated from daily data as processed by A. Kholodov. Mareike Wieczorek calculated the MAGT time series, which were only created if not more than one complete month and not more than 20% overall values were missing in a dataset. Data are available from various depth at 0 cm, 10 cm, 20 cm, 25 cm, 40 cm, 50 cm, 300 cm, 400 cm, 500 cm, 1000 cm, 1500 cm, 2000, but not all sites have values at all depths.
DOI: 10.1594/pangaea.977789
title: Physical oceanography from mooring KPO_1179

description: GEOMAR moorings are typically equipped with instruments recording pressure, temperature, conductivity, dissolved oxygen and current velocity. Instruments with pressure, temperature, conductivity and oxygen sensors were calibrated in situ immediately prior to and after a mooring deployment period by attaching them to the CTD frame during CTDO casts. Correction terms were then developed from the difference between the sensor readings and the calibrated CTDO data during several minute long calibration stops. These correction terms were then applied to the full deployment periods. This ensured best data quality with recognition of potential sensor drifts and also allowed for the estimation of calibration and measurement errors (Hahn et al. 2014, Bittig et al. 2018, Berx et al. 2019).
description: Optode hydroflashO2 measurements from 2016-09-01 until 2017-05-08
DOI: 10.15468/dl.f26ngv
title: Occurrence Download

description: A dataset listing the 30645 species recorded in GBIF matching the query:
{
 "and" : [
 "PublishingOrg is b8323864-602a-4a7d-9127-bb903054e97d",
 "TaxonKey is Animalia"
 ]
}

 The dataset's 30645 records were derived from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0059785-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.978167
title: Surface underway O2 and GTD data during METEOR cruise M116/1

description: Lab and field experiments were conducted with 13 CONTROS HydroFlash O2 optodes to evaluate the performance of this oxygen sensor. All optodes received pre- and post-deployment calibrations (multi-point and/or two-point), and field data complemented the extensive characterization, facilitating to address information about its salinity and hydrostatic pressure dependence, its stability assessment during storage and deployment, and its time dependence as well as performance on observation platforms.
DOI: 10.1594/pangaea.984513
title: Water chemistry of Lagrangian samplings of Inland Elbe 2024 (MOSES Hydrological Extremes)

description: Within the framework of MOSES (Modular Observation Solutions for Earth Systems) and ElbeXtreme, we performed three longitudinal sampling campaigns in the Elbe catchment in 2024. The campaigns covered the German freshwater part, the tidal Elbe river, and the German Bight. Here we present the results of the freshwater river where the sampling was conducted in a Langrangian way according to flow velocity. Physico-chemical and biological parameters were measured along the Elbe from bridges between Bad Schandau (km 12, Czech-German border) and Lauenburg (km 570, close to Hamburg). A particular scientific focus was on (1) nutrients and eutrophication, (2) composition of dissolved organic matter measured by high-resolution mass spectrometry, (3) greenhouse gas measurements, and (4) micropollutants. This was done during a winter flood event in January, a summer drought in July, and a second smaller flood in September 2024.
DOI: 10.1594/pangaea.984746
title: Thermogravimetric analysis (TGA) results of bulk organic matter in marine sediment core PS51/154-11 from the Laptev Sea, Arctic Ocean

description: This datasheet includes the results of thermogravimetric analysis (TGA) from marine sediment core PS51/154-11. Sediment samples of ~20 mg were dried, ground, and analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984747
title: Radiocarbon data of bulk organic matter in marine sediment core PS51/159-10 from the Laptev Sea, Arctic Ocean

description: This datasheet includes radiocarbon measurement results of bulk organic matter from core PS51/159-10. Sediments were freeze-dried, ground, and weighed into silver boats, with sample sizes determined by TOC content to target 1 mg of organic carbon. Samples were acidified with three drops of 6 M HCl at 60 °C three times with one hour reaction time between treatments, then oven-dried overnight at 60 °C. Afterwards, acidified samples together with silver boats were folded into tin boats and converted into graphite targets using an elemental analyzer (Elementar vario Isotope) coupled to an automated graphitization system (Ionplus AG, AGE-3). Radiocarbon measurements were conducted using the MIni CArbon Dating System (MICADAS) accelerator mass spectrometer at Alfred Wegener Institute (AWI) (Mollenhauer et al., 2021).
DOI: 10.1594/pangaea.984748
title: Thermogravimetric analysis (TGA) results of bulk organic matter in marine sediment core PS51/159-10 from the Laptev Sea, Arctic Ocean

description: This datasheet includes the results of thermogravimetric analysis (TGA) from marine sediment core PS51/159-10. Sediment samples of ~20 mg were dried, ground, and analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984749
title: TOC, CN, and δ13C results of bulk organic matter in permafrost from the Lena Delta, Arctic

description: This datasheet includes TOC, C/N, and δ13C results of bulk organic matter from permafrost collected from the Lena Delta. Samples were freeze-dried, homogenized, weighed ~15 mg into silver boats, acidified with 1.5 M HCl, and dried at 55 ˚C. The analyses were conducted using a Thermo Fisher Scientific DeltaQ IRMS coupled with a FLASH 2000 CHNS Analyzer via a CONFLO IV gas mixing system at CNR-ISP in Bologna, Italy.
DOI: 10.1594/pangaea.984750
title: Radiocarbon data of bulk organic matter in permafrost from the Lena Delta, Arctic

description: This datasheet includes radiocarbon measurement results of bulk organic matter from permafrost collected from the Lena Delta. Sediments were freeze-dried, ground, and weighed into silver boats, with sample sizes determined by TOC content to target 1 mg of organic carbon. Samples were acidified with three drops of 6 M HCl at 60 °C three times with one hour reaction time between treatments, then oven-dried overnight at 60 °C. Afterwards, acidified samples together with silver boats were folded into tin boats and converted into graphite targets using an elemental analyzer (Elementar vario Isotope) coupled to an automated graphitization system (Ionplus AG, AGE-3). Radiocarbon measurements were conducted using the MIni CArbon Dating System (MICADAS) accelerator mass spectrometer at Alfred Wegener Institute (AWI) (Mollenhauer et al., 2021).
DOI: 10.1594/pangaea.984751
title: Thermogravimetric analysis (TGA) results of bulk organic matter in permafrost from the Lena Delta, Arctic

description: This datasheet includes the results of thermogravimetric analysis (TGA) from permafrost samples collected from the Lena Delta. Sediment samples of ~20 mg were dried, ground, and analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984752
title: Radiocarbon and thermogravimetric analysis (TGA) results of permafrost leachate from the Lena Delta, Arctic

description: This datasheet includes radiocarbon and thermogravimetric analysis (TGA) results of permafrost leachate from samples collected in the Lena Delta. The leaching protocol followed Ksionzek et al. (2018). Around 200 mg of dried sediment was leached in 20 mL deionized water for 24 hours at 4 °C, with intermittent shaking every 6−8 hours. The leachates were filtered through 0.7 μm GF/F filters, acidified to pH 2 using 37% HCl, and analyzed by high-temperature catalytic combustion (Shimadzu, TOC-VCPN). Pretreatment and measurement of radiocarbon analysis followed protocols in Mollenhauer et al. (2021). Freeze-dried leachates were wrapped into silver boats and converted into graphite targets using Elementar vario Isotope coupled to Ionplus AG, AGE-3. Radiocarbon isotopic ratios were measured using MICADAS at AWI, Bremerhaven. For TGA analysis, leachate samples of ~10 mg were analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984753
title: Radiocarbon and thermogravimetric analysis (TGA) results of leached permafrost from the Lena Delta, Arctic

description: This datasheet includes radiocarbon and thermogravimetric analysis (TGA) results of the remaining permafrost after leaching from samples collected in the Lena Delta. The leaching protocol followed Ksionzek et al. (2018). Around 200 mg of dried sediment was leached in 20 mL deionized water for 24 hours at 4 °C, with intermittent shaking every 6−8 hours. After extracting the leachate, the remaining fraction was again freeze-dried. Pretreatment and measurement of radiocarbon analysis on the permafrost remainder followed Mollenhauer et al., 2021. Sediments were freeze-dried, ground, and weighed into silver boats, with sample sizes determined by TOC content to target 1 mg of organic carbon. Samples were acidified with three drops of 6 M HCl at 60 °C three times with one hour reaction time between treatments, then oven-dried overnight at 60 °C. Afterwards, acidified samples together with silver boats were folded into tin boats and converted into graphite targets using an elemental analyzer (Elementar vario Isotope) coupled to an automated graphitization system (Ionplus AG, AGE-3). Radiocarbon measurements were conducted using the MIni CArbon Dating System (MICADAS) accelerator mass spectrometer at Alfred Wegener Institute (AWI). For TGA analysis, about 20 mg of the remained permafrost were analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984754
title: δ13C results of bulk organic matter in marine surface sediments from the Laptev Sea, Arctic Ocean

description: The data were obtained from marine surface sediments (0-1 cm depth) from the Laptev Sea during three research expeditions. Samples were retrieved using box corers and multiple corers, and the sediments were dried immediately after subsampling. Sample pretreatment and measurements were carried out at the AWI ISOLAB Facility - Stable Isotope Laboratory Potsdam (see https://registry.o2a-data.de/items/7986) and CNR-ISP in Bologna. For samples analyzed at the ISOLAB Facility, samples were ground, acidified with 6 M HCl at 60 °C for three hours and dried before sending to the ISOLAB Facility. At the ISOLAB Facility, acidified samples were homogenized and weighed into tin capsules. The amount of sample used for δ13C analysis was based on TOC content, aiming for 0.2 mg of organic carbon per measurement. Analyses were performed using a Thermo Fisher Scientific Delta-V-Advantage gas mass spectrometer coupled with a FLASH elemental analyzer EA 2000 and a CONFLO IV gas mixing system (see https://registry.o2a-data.de/items/7984). At CNR-ISP, approximately 15 mg of sediment was weighed into silver boats, acidified with 1.5 M HCl, and dried at 55 ˚C. The samples were analyzed using a Thermo Fisher Scientific DeltaQ IRMS coupled with a FLASH 2000 CHNS Analyzer via a CONFLO IV gas mixing system. The standard deviation (1σ) of δ13C measurement was generally better ±0.15‰ for the ISOLAB Facility, and better than ±0.1‰ in CNR-ISP.
DOI: 10.1594/pangaea.984755
title: Radiocarbon data of bulk organic matter in marine surface sediments from the Laptev Sea, Arctic Ocean

description: This datasheet includes radiocarbon measurement results of bulk organic matter from marine surface sediments from the Laptev Sea. Sediments were freeze-dried, ground, and weighed into silver boats, with sample sizes determined by TOC content to target 1 mg of organic carbon. Samples were acidified with three drops of 6 M HCl at 60 °C three times with one hour reaction time between treatments, then oven-dried overnight at 60 °C. Afterwards, acidified samples together with silver boats were folded into tin boats and converted into graphite targets using an elemental analyzer (Elementar vario Isotope) coupled to an automated graphitization system (Ionplus AG, AGE-3). Radiocarbon measurements were conducted using the MIni CArbon Dating System (MICADAS) accelerator mass spectrometer at Alfred Wegener Institute (AWI) (Mollenhauer et al., 2021).
DOI: 10.1594/pangaea.984756
title: Thermogravimetric analysis (TGA) results of bulk organic matter in marine surface sediments from the Laptev Sea, Arctic Ocean

description: This datasheet includes the results of thermogravimetric analysis (TGA) from marine surface sediments from the Laptev Sea. Sediment samples of ~20 mg were dried, ground, and analyzed in 70 μL aluminum oxide crucibles using a Mettler Toledo TGA/DSC 1. The samples were heated from 25 to 1000 °C at a rate of 10 °C min-1 under a constant argon flow of 20 mL min-1, following similar settings from Smeaton & Austin (2022). Following Lopez-Capel et al. (2006), weight loss between 200–400 °C is attributed to the decomposition of labile organic matter (OML), while weight loss between 400–650°C corresponds to the decomposition of recalcitrant and refractory organic matter (OMR). The percentage of labile organic matter (OML/OM) is calculated as [OML/(OML+OMR)]*100%
DOI: 10.1594/pangaea.984837
title: Master track of HEINCKE cruise HE666 in 1 sec resolution (zipped, 107 MB)

description: Raw data acquired by position sensors on board RV Heincke during expedition HE666 were processed to receive a validated master track which can be used as reference of further expedition data. During HE666 the inertial navigation system IXSEA PHINS III and the GPS receivers Trimble Marine SPS461 and SAAB R5 SUPREME NAV were used as navigation sensors. Data were downloaded from DAVIS SHIP data base (https://dship.awi.de) with a resolution of 1 sec. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track.
DOI: 10.15468/dl.hn6dca
title: Occurrence Download

description: A dataset containing 34080 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Belgium",
 "TaxonKey is one of (Crassula helmsii, Lithobates catesbeianus, Misgurnus mohoity, Myriophyllum aquaticum, Procambarus clarkii, Procambarus virginalis, Xenopus laevis, Zizania latifolia)",
 "OccurrenceStatus is Present",
 "Year is greater than or equal to 2000"
 ]
}

 The dataset includes 34080 records from 39 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0059806-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.82144/cc753096
title: Opportunistic marine mammal sightings from commercial whale watching vessels, Montauk, New York 1981-1994

description: Original provider:
Coastal Research and Education Society of Long Island, Inc.

Dataset credits:
Coastal Research and Education Society of Long Island, Inc.

Abstract:
The sightings came originally from the
Okeanos Ocean Research Foundation (Samuel S. Sadove, executive director; Okeanos is no longer in existence), and were recorded from commercial whale-watching vessels out of Montauk in late spring and summer of 1981–1994 (primarily the Finback I and Finback II). These sightings are heavily concentrated in the area between eastern Long Island and Block Island and during the whale-watching season, and therefore somewhat biased, but provide valuable information on several less-common species.
DOI: 10.15468/dl.cvkmq9
title: Occurrence Download

description: A dataset containing 145203515 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Asia",
 "Year 2010-2025"
 ]
}

 The dataset includes 145203515 records from 8993 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058855-250920141307145/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dpu63k
title: Occurrence Download

description: A dataset containing 316 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Crotalus polystictus (Cope, 1865)"
 ]
}

 The dataset includes 316 records from 38 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0030307-180508205500799/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jzqet6
title: Occurrence Download

description: A dataset containing 96198 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Artemisia campestris L.)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 96198 records from 672 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002033-240202131308920/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.