cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.939421
title: Water vapor observation at 3 m height above ground at Dome C, East Antarctic plateau (2018-2020)

description: The data set provides 3 years of almost continuous observation of water vapor in the air at 3m height on the high antarctic plateau, 123° 21' E, 75° 06' S, 3233 m above sea level. Each data is an average over the previous ½ hour. The water vapor content is measured in a heated air flow to avoid that supersaturated air at ambient temperature deposits excess moisture (above 100% with respect to ice) before reaching the humidity sensor. In fact, many reports correspond to significant supersaturation (see references provided). HMP155 thermohygrometers are used, which for the hygrometer natively report relative humidity with respect to liquid water even below 0°C. This is the variable provided in the data set, along with temperature in the heated air flow and ambient temperature. There are several conversion formulae in the literature to convert to e.g. partial pressure and relative humidity with respect to ice. As there is no clear consensus on which should be preferred in the range of temperatures at Dome C, the user is left to carry our her/his own conversions.
DOI: 10.1594/pangaea.939422
title: Water vapor observation at 18 m height above ground at Dome C, East Antarctic plateau (2018-2020)

description: The data set provides 3 years of almost continuous observation of water vapor in the air at 18m height on the high antarctic plateau, 123° 21' E, 75° 06' S, 3233 m above sea level. Each data is an average over the previous ½ hour. The water vapor content is measured in a heated air flow to avoid that supersaturated air at ambient temperature deposits excess moisture (above 100% with respect to ice) before reaching the humidity sensor. In fact, many reports correspond to significant supersaturation (see references provided). HMP155 thermohygrometers are used, which for the hygrometer natively report relative humidity with respect to liquid water even below 0°C. This is the variable provided in the data set, along with temperature in the heated air flow and ambient temperature. There are several conversion formulae in the literature to convert to e.g. partial pressure and relative humidity with respect to ice. As there is no clear consensus on which should be preferred in the range of temperatures at Dome C, the user is left to carry our her/his own conversions.
DOI: 10.1594/pangaea.939424
title: Water vapor observation at 42 m height above ground at Dome C, East Antarctic plateau (2018-2020)

description: The data set provides 3 years of almost continuous observation of water vapor in the air at 42m height on the high antarctic plateau, 123° 21' E, 75° 06' S, 3233 m above sea level. Each data is an average over the previous ½ hour. The water vapor content is measured in a heated air flow to avoid that supersaturated air at ambient temperature deposits excess moisture (above 100% with respect to ice) before reaching the humidity sensor. In fact, many reports correspond to significant supersaturation (see references provided). HMP155 thermohygrometers are used, which for the hygrometer natively report relative humidity with respect to liquid water even below 0°C. This is the variable provided in the data set, along with temperature in the heated air flow and ambient temperature. There are several conversion formulae in the literature to convert to e.g. partial pressure and relative humidity with respect to ice. As there is no clear consensus on which should be preferred in the range of temperatures at Dome C, the user is left to carry our her/his own conversions.
DOI: 10.1594/pangaea.909044
title: Phosphorus fractions of core Burg17-C

description: #0=NA
DOI: 10.1594/pangaea.909851
title: Phosphorus flux of sediment core Burg17-C
DOI: 10.1594/pangaea.910565
title: Temporal evolution of dissolved organic matter properties of bottommost water sample from F2 during dark incubation

description: Two stations were visited in the western tropical Pacific Ocean: The South-East Asia Time-series Station (SEATS) in the northern South China Sea (SCS) and station F2 in the Philippine Sea, ~230 km to the northeast of the Luzon Strait. Water samples were taken aboard the R/V Dong-Fang-Hong 2 in July and August 2017 from 13 depths between 5 m and 3800 m at SEATS and 11 depths between 5 m and 3200 m at F2 using Niskin bottles mounted on a SeaBird 911 conductivity-temperature-depth (CTD) rosette sampler. A time-course dark incubation (50 days) with sampling time at 0, 3, 7, 11, 15, 23, 34 and 50 d was conducted for the bottommost sample from F2 with and without prior exposure to solar radiation. The value of different parameters was calculated as the ratio of the signal of property X at irradiation time t to that at time zero.
DOI: 10.1594/pangaea.942015
title: Data Set for the 2019-2020 summer campaign: Summer variability of the atmospheric NO2:NO ratio at Dome C, on the East Antarctic Plateau

description: Atmospheric abundances of Nitrogen dioxide (NO2), Nitrogen oxide (NOx), Nitric oxide (NO) and Ozone (O3) have been measured at Antarctic station Dome C (-75.10 lat., 123.33 long., 3233 m a.s.l). They have been retrieved from direct and in-situ atmospheric measurements using newly developed optical instruments based on absorption spectroscopy (incoherent broadband cavity enhanced absorption spectroscopy or IBBCEAS). These instruments directly measure NO2 with a detection limit of 30 pptv (parts per trillion by volume or 1E-12 mol/mol) (3σ). We performed two sets of measurements in December 2019 (4th to 9th) and January 2020 (16th to 25th) to capture the early and late photolytic season, respectively. The dataset also contains photolysis rate coefficients of Nitrogen dioxide and Ozone, and the Ozone production rate.
description: Calculation of the O3 production rate P_{O3}:P_{O3} = (k_{RO2+NO}[RO2] + k_{HO2+NO}[HO2]) * [NO] * Vwith k_{RO2+NO} and k_{HO2+NO} the kinetic rate coefficients of the reactions RO2 + NO → NO2 + RO and HO2 + NO → NO2 + OH, respectively, expressed in cm**3/molecules/s; [RO2] and [HO2], the species concentrations expressed in molecule/cm**3 and derived from the correlation between J(NO2) and [RO2] and the [RO2]/[HO2] ratio (Kukui et al., 2014); [NO] the concentration of NO expressed in molecule/cm**3; and V the arbitrary volume expressed as 1 cm * 1cm * H_PBL cm with polar boundary layer height H_PBL, given by the MAR regional model.
DOI: 10.1594/pangaea.910557
title: Vertical profiles of dissolved organic matter in irradiated vs. unirradiated samples from SEATS and F2

description: Two stations were visited in the western tropical Pacific Ocean: The South-East Asia Time-series Station (SEATS) in the northern South China Sea (SCS) and station F2 in the Philippine Sea, ~230 km to the northeast of the Luzon Strait. Water samples were taken aboard the R/V Dong-Fang-Hong 2 in July and August 2017 from 13 depths between 5 m and 3800 m at SEATS and 11 depths between 5 m and 3200 m at F2 using Niskin bottles mounted on a SeaBird 911 conductivity-temperature-depth (CTD) rosette sampler. Lab irradiation experiments of samples from different sampling depth were carried out. The samples were irradiated for 6 days under a SUNTEST XLS+ solar simulator equipped with a 1.5 kW xenon lamp and a special UV filter to remove radiation at wavelengths &lt;290 nm. The samples before and after irradiation were defined as 'unirradiated samples' and 'irradiated samples', respectively. This table lists the chemical and optical properties of dissolved organic matter at different sampling depth before and after 6-d irradiation.
DOI: 10.1594/pangaea.932512
title: Ten years of shielded ventilated atmospheric temperature observation on a 45-m tower at Dome C, East Antarctic plateau

description: Long-term, continuous in situ observations of the near-surface atmospheric boundary layer are critical for many weather and climate applications. Although there is a proliferation of surface stations globally, especially in and around populous areas, there are notably fewer tall meteorological towers with multiple instrumented levels. This is particularly true in remote and extreme environments such as the Eastern Antarctic plateau. In the article, we present and analyze 10 years (2010-2019) of data from 6 levels of meteorological instrumentation mounted on a 45-m tower located at Dome C, East Antarctica near the Concordia research station, producing a unique climatology of the near-surface environment. Large seasonal differences are evident in the monthly mean temperature and wind data, depending on the presence or absence of solar surface forcing. Strong vertical temperature gradients (inversions) frequently develop in calm, winter conditions, while vertical convective mixing occurs in the summer leading to near-uniform temperatures along the tower. Seasonal variation in wind speed is much less notable at this location than the temperature variation as the winds are less influenced by the solar cycle; there are no katabatic winds as Dome C is quite flat. Harmonic analysis confirms that most of the energy in the power spectrum is at diurnal, annual and semi-annual scales. Analysis of observational uncertainty and comparison to reanalysis data from ERA-5 indicate that wind speed is particularly difficult to measure at this location.
DOI: 10.1594/pangaea.932513
title: Ten years of wind speed observation on a 45-m tower at Dome C, East Antarctic plateau

description: Long-term, continuous in situ observations of the near-surface atmospheric boundary layer are critical for many weather and climate applications. Although there is a proliferation of surface stations globally, especially in and around populous areas, there are notably fewer tall meteorological towers with multiple instrumented levels. This is particularly true in remote and extreme environments such as the Eastern Antarctic plateau. In the article, we present and analyze 10 years (2010-2019) of data from 6 levels of meteorological instrumentation mounted on a 45-m tower located at Dome C, East Antarctica near the Concordia research station, producing a unique climatology of the near-surface environment. Large seasonal differences are evident in the monthly mean temperature and wind data, depending on the presence or absence of solar surface forcing. Strong vertical temperature gradients (inversions) frequently develop in calm, winter conditions, while vertical convective mixing occurs in the summer leading to near-uniform temperatures along the tower. Seasonal variation in wind speed is much less notable at this location than the temperature variation as the winds are less influenced by the solar cycle; there are no katabatic winds as Dome C is quite flat. Harmonic analysis confirms that most of the energy in the power spectrum is at diurnal, annual and semi-annual scales. Analysis of observational uncertainty and comparison to reanalysis data from ERA-5 indicate that wind speed is particularly difficult to measure at this location.
DOI: 10.1594/pangaea.912277
title: Phosphorus concentration and speciation data of core SN4 (Tarfaya Basin)

description: total phosphorus and aluminium concentrations measured with ICP-OES phosphorus speciation data concentrations of total organic carbon, carbonate and nitrogen accumulation rates
DOI: 10.1594/pangaea.864090
title: A BRDF-BPDF database for the analysis of Earth targets reflectances

description: A database of representative BRDF and BPDF derived from the POLDER measurements. From the huge amount of data acquired by the spaceborne instrument over a period of 7 years, we selected a set of targets with high quality observations. The selection aimed at a large number of observations, free of cloud or aerosol contamination, acquired in diverse observation geometry with a focus on the backscatter direction that shows the specific Hot-Spot signature. The targets are sorted according to the 16-classes IGBP land cover classification system and the target selection aims at a spatial representativeness within the class. The database thus provides a set of high quality BRDF and BPDF samples that can be used to assess the typical variability of natural surface reflectances or to evaluate models.
description: This is a a new, improved, version of what has been available from Postel (http://postel.obs-mip.fr/?POLDER-3-BRDF-Data-Bases).
description: Supplement to: Bréon, François-Marie; Maignan, Fabienne (2016): A BRDF-BPDF database for the analysis of Earth targets reflectances. Earth System Science Data, 9, 31-45
DOI: 10.1594/pangaea.969051
title: Color b∗ index of sediment core LV63-41-2
DOI: 10.1594/pangaea.969054
title: Calcium carbonate contents of sediment core LV63-41-2
DOI: 10.1594/pangaea.969055
title: Soil chemical database of the BraSol-2010 project

description: This database contains all available data from the 2008 soil study in NE-Brazil. Soils were sampled in four interlinked E - W transects (A and B) plus a shorter transect in the driest part of Paraíba state (C transect) from the coast inland. Three layers were sampled in A and B: Litter from the surface avoiding mineral soil (ORG), the top 20 cm (TOP = 0-20 cm), and a deeper mineral soil layer (BOT = 30-50 cm). Transect C offers ORG and TOP samples. All samples were taken with discardable lab gloves. All mineral soil was sampled with Eijkelkamp soil augers. Litter samples were put into clean cotton bags; mineral soil double-bagged into labelled Rilsan® bags. Upon return to the university labs in Natal, all material was oven-dried and aliquoted (quartering). An aliquot each went to the Universities of Natal (UFRN) and Vicosa (Minas Gerais), the remainder transported to the Freiberg laboratories for all subsequent analytical work. See metadata file (.txt) for more details.
DOI: 10.1594/pangaea.969059
title: Chlorin content of sediment core LV63-41-2
DOI: 10.1594/pangaea.969061
title: Magnetic susceptibility of sediment core LV63-41-2
DOI: 10.1594/pangaea.969062
title: δ13C of organic carbon from sediment core LV63-41-2
DOI: 10.1594/pangaea.969063
title: Carbon/nitrogen ratio of sediment core LV63-41-2

description: The carbon-to-nitrogen (C/N) ratio may provide information about the origin of the preserved organic matter in the sediment. The content of carbon and nitrogen in the sediment was measured by the Euro EA (HEKAtech GmbH) analyzer in 1-2 mg samples by burning it at a temperature of 920°C under a flow of high purity helium in the laboratory of the Geochronology of the Cenozoic at the Institute of Archaeology and Ethnography (Novosibirsk, Russia). Urea STD PN33840002 (ThermoScientific) was used for calibration as a reference for the measurement of these elements. The precision of measured values was less than 1% for carbon and nitrogen.
DOI: 10.1594/pangaea.969070
title: Diatom frustules of sediment core LV63-41-2

description: One-centimeter slices of sediment sampled at 2-4 cm intervals were analyzed for diatom abundance, species richness, and species identification. Diatom abundance and taxon identification was performed using an Olympus BX-43 light microscope at 1000x. A total of 213 diatom species were found in 175 samples from the studied sediment. More than 300 diatom frustules were identified to the species level to obtain a special statistical distribution of the diatom assemblages. Sediment samples with very few diatom frustules were enriched using a heavy liquid technique to obtain the required statistical number of specimens. Diatom abundance expressed as the number of frustules per 1 g of dry sediment (fr./g); species richness as the number of species per sample (species/sample), and the percentages of each species in the diatom taxa assemblages were calculated.
DOI: 10.1594/pangaea.969428
title: Effect of temperature on aerobic microbial respiration associated with decaying copepod carcasses

description: The effect of varying temperature on the kinetics of aerobic microbial respiration (a proxy for oxidative carbon mineralization) associated with copepod carcasses was studied in laboratory incubation experiments. Copepod carcasses were produced by exposing female specimens of cultured Acartia tonsa to anoxic conditions for 2 hours. Carcasses were incubated in gas-tight glass vials equipped with an internal optode for contactless oxygen measurements at 5 different temperatures ranging between 4 and 20°C. Carcass-associated oxygen consumption was measured for varying time periods as a proxy for aerobic microbial respiration.
description: The Acartia tonsa specimens used for experimentation were obtained from a long-established laboratory culture at the Department of Science and Environment at Roskilde University. The original collection site of the copepods is unknown.
DOI: 10.1594/pangaea.969429
title: Effect of temperature on bacterial abundance in the water surrounding decaying copepod carcasses

description: The effect of varying temperature on the kinetics of aerobic microbial respiration (a proxy for oxidative carbon mineralization) associated with copepod carcasses was studied in laboratory incubation experiments. Copepod carcasses were produced by exposing female specimens of cultured Acartia tonsa to anoxic conditions for 2 hours. Carcasses were incubated in gas-tight glass vials at 5 different temperatures ranging between 4 and 20°C. Bacterial abundance in the water surrounding the carcasses was determined throughout the incubations.
description: The Acartia tonsa specimens used for experimentation were obtained from a long-established laboratory culture at the Department of Science and Environment at Roskilde University. The original collection site of the copepods is unknown.
DOI: 10.1594/pangaea.969430
title: Effect of temperature on the cumulative carbon loss from decaying copepod carcasses

description: The effect of varying temperature on the kinetics of aerobic microbial respiration (a proxy for oxidative carbon mineralization) associated with copepod carcasses was studied in laboratory incubation experiments. Copepod carcasses were produced by exposing female specimens of cultured Acartia tonsa to anoxic conditions for 2 hours. Carcasses were incubated in gas-tight glass vials equipped with an internal optode for contactless oxygen measurements at 5 different temperatures ranging between 4 and 20°C. Carcass-associated oxygen consumption was measured for varying time periods. The obtained respiration rates were converted to carbon mineralization rates using 3 different theoretical values for the respiratory quotient and 3 different theoretical values for bacterial production and then to the cumulative carbon loss relative to the initial carbon contents of the carcasses.
description: The Acartia tonsa specimens used for experimentation were obtained from a long-established laboratory culture at the Department of Science and Environment at Roskilde University. The original collection site of the copepods is unknown.
DOI: 10.1594/pangaea.969431
title: Effect of temperature and degradation stage on the sinking velocity of decaying copepod carcasses

description: The effect of varying temperature on the kinetics of aerobic microbial respiration (a proxy for oxidative carbon mineralization) associated with copepod carcasses was studied in laboratory incubation experiments. Copepod carcasses were produced by exposing female specimens of cultured Acartia tonsa to anoxic conditions for 2 hours. Carcasses were incubated in gas-tight glass vials at 5 different temperatures ranging between 4 and 20°C. The sinking velocity of carcasses of different degradation stage was determined at 3 different temperatures.
description: The Acartia tonsa specimens used for experimentation were obtained from a long-established laboratory culture at the Department of Science and Environment at Roskilde University. The original collection site of the copepods is unknown.
DOI: 10.15468/dl.w9hhte
title: Occurrence Download

description: A dataset containing 60 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "TaxonKey is Eupsittula cactorum (Kuhl, 1820)"
 ]
}

 The dataset includes 60 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0041954-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xm9wn2
title: Occurrence Download

description: A dataset containing 252259 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Veronica beccabunga L.)",
 "HasCoordinate is true",
 "OccurrenceStatus is Present",
 "HasGeospatialIssue is false",
 {
 "not" : {
 "BasisOfRecord" : [
 "is one of (Fossil, Specimen)"
 ]
 }
 }
 ]
}

 The dataset includes 252259 records from 1077 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0041952-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.15186352
title: Watermelon-Sesbania rotation enhance soil quality in greenhouses systems by driving  soil properties and functional microorganisms

description: Continuous monoculture of watermelon in greenhouses often leads to soil degradation by disrupting microbial communities and nutrient cycling, yet effective mitigation strategies remain unclear. In this study, we conducted a three-year experiment to investigate the effects of watermelon-Sesbania rotation on soil chemical properties, microbial diversity (bacterial, fungal, archaeal, and viral), community composition, and functional gene profiles related to carbon, nitrogen, phosphorus, and sulfur cycling. We show that a three-year Sesbania rotation significantly improves soil properties compared to continuous watermelon monoculture, increasing soil organic matter by 103%, total nitrogen by 53%, available nitrogen by 48%, and available phosphorus by 98%. Extended rotations particularly enhanced beneficial microorganisms, including bacteria (e.g., Chloracidobacterium, Rubrivivax, Pyrinomonas) and archaea (Methanohalophilus), which promote carbon fixation and nitrogen cycling while suppressing monoculture-associated pathogens. Both bacterial and fungal community structures (beta diversity) changed significantly under rotation treatments. Additionally, functional genes related to carbon, nitrogen, and phosphorus metabolism (e.g., rbcS, nasB, gntK) were significantly enriched in rotated soils, driven primarily by improved nutrient availability and pH. The soil quality index increased by 92.5% in the three-year rotation, with total nitrogen and organic matter identified as the main drivers. Our findings, for the first time, demonstrate that watermelon-Sesbania rotation can improve soil quality in greenhouse systems by driving soil properties and functional microorganisms, and that these effects are enhanced over time with increasing rotation duration, overcoming common barriers associated with continuous cropping in greenhouse production systems. We recommend a minimum rotation period of three years to achieve substantial improvements in soil health and sustainability.