cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.935398
title: Dendrometer and meteorological data from the TreeNet network, year 2011

description: The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day-night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly-resolved radial stem growth of seven temperate tree species, based on 57 million underlying data points over a period of up to 8 years. We show that trees grow mainly at night, with a peak after midnight, when the vapour pressure deficit (VPD) is among the lowest. A high VPD strictly limits radial stem growth and allows little growth during daylight hours, except in the early morning. Surprisingly, trees also grow in moderately dry soil when the VPD is low. Species-specific differences in diel growth dynamics show that species able to grow earlier during the night are associated with the highest number of hours with growth per year and the largest annual growth increment. We conclude that species with the ability to overcome daily water deficits faster have greater growth potential. Furthermore, we conclude that growth is more sensitive than carbon uptake to dry air, as growth stops before stomata are known to close.
DOI: 10.1594/pangaea.967395
title: KOSMOS 2021 Gran Canaria mesocosm study on ocean alkalinity enhancement: CTD data

description: The data presented herein originates from a mesocosm study conducted as part of the EU H2020 OceanNETs project, aimed at investigating the ecological ramifications of ocean alkalinity enhancement. Nine mesocosms were deployed in Taliarte Harbour, Gran Canaria, Spain, and systematically sampled using integrated water samplers over the period spanning from September 10th to October 25th, 2021. Alkalinity was employed in a gradient design, ranging from ambient (0 µeq kg-1 added alkalinity, OAE0) to elevated levels of 2400 µeq kg-1 additional alkalinity (OAE2400) in increments of 300 µeq kg-1. The dataset encompasses a spectrum of sediment trap particle flux data, water column biogeochemistry variables, including inorganic nutrients, carbonate chemistry parameters, and particulate matter, alongside chlorophyll a concentrations. The study and data set offer insights into impacts of alkalinity enhancement on marine ecosystems and their associated biogeochemistry.
DOI: 10.1594/pangaea.935386
title: Dendrometer and meteorological data from the TreeNet network, year 1997

description: The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day-night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly-resolved radial stem growth of seven temperate tree species, based on 57 million underlying data points over a period of up to 8 years. We show that trees grow mainly at night, with a peak after midnight, when the vapour pressure deficit (VPD) is among the lowest. A high VPD strictly limits radial stem growth and allows little growth during daylight hours, except in the early morning. Surprisingly, trees also grow in moderately dry soil when the VPD is low. Species-specific differences in diel growth dynamics show that species able to grow earlier during the night are associated with the highest number of hours with growth per year and the largest annual growth increment. We conclude that species with the ability to overcome daily water deficits faster have greater growth potential. Furthermore, we conclude that growth is more sensitive than carbon uptake to dry air, as growth stops before stomata are known to close.
DOI: 10.1594/pangaea.935387
title: Dendrometer and meteorological data from the TreeNet network, year 1998

description: The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day-night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly-resolved radial stem growth of seven temperate tree species, based on 57 million underlying data points over a period of up to 8 years. We show that trees grow mainly at night, with a peak after midnight, when the vapour pressure deficit (VPD) is among the lowest. A high VPD strictly limits radial stem growth and allows little growth during daylight hours, except in the early morning. Surprisingly, trees also grow in moderately dry soil when the VPD is low. Species-specific differences in diel growth dynamics show that species able to grow earlier during the night are associated with the highest number of hours with growth per year and the largest annual growth increment. We conclude that species with the ability to overcome daily water deficits faster have greater growth potential. Furthermore, we conclude that growth is more sensitive than carbon uptake to dry air, as growth stops before stomata are known to close.
DOI: 10.1594/pangaea.935399
title: Dendrometer and meteorological data from the TreeNet network, year 2007

description: The timing of diel stem growth of mature forest trees is still largely unknown, as empirical data with high temporal resolution have not been available so far. Consequently, the effects of day-night conditions on tree growth remained uncertain. Here we present the first comprehensive field study of hourly-resolved radial stem growth of seven temperate tree species, based on 57 million underlying data points over a period of up to 8 years. We show that trees grow mainly at night, with a peak after midnight, when the vapour pressure deficit (VPD) is among the lowest. A high VPD strictly limits radial stem growth and allows little growth during daylight hours, except in the early morning. Surprisingly, trees also grow in moderately dry soil when the VPD is low. Species-specific differences in diel growth dynamics show that species able to grow earlier during the night are associated with the highest number of hours with growth per year and the largest annual growth increment. We conclude that species with the ability to overcome daily water deficits faster have greater growth potential. Furthermore, we conclude that growth is more sensitive than carbon uptake to dry air, as growth stops before stomata are known to close.
DOI: 10.1594/pangaea.931905
title: Depth, age, diatom concentration and Chaetoceros resting spores of sediment core JPC43 in Neny Fjord, Antarctic Peninsula

description: Diatom abundance and assemblage data are presented for JPC43 - a ~12 m marine sediment core recovered from 576 m water depth in Neny Fjord, Marguerite Bay, Antarctic Peninsula (68.2571°S, 66.9617°W). The core was collected aboard the RVIB Nathanial B Palmer in 2002 during the NBP0201 scientific cruise (PI: Prof J B Anderson) to determine the timing of deglaciation in the fjords of the Antarctic Peninsula. The core record spans the Holocene with samples dated using an age model based on 5 reliable radiocarbon dates. Diatom concentrations and the contribution of Chaetoceros resting spores (CRS %) are calculated from counts (mean=474.4 valves) of the whole diatom assemblage - 'total counts' (n=81). The relevant methods are described and referenced in the associated publication (Allen et al. 2010).
DOI: 10.1594/pangaea.933155
title: Diatom species and geochemical element concentration on sediments from San Juana Floodplain lake, Santander, Colombia
DOI: 10.1594/pangaea.923433
title: Styx ice core nitrous oxide over the past 2000 years
DOI: 10.1594/pangaea.951105
title: Shapefile of annual severe coral bleaching risk (average year of onset) for marine protected areas across Indonesia

description: This shapefile/vector shows you the projected year beyond which a coral reef is expected to experience severe annual bleaching conditions, based on the reef being exposed to at least 8 Degree Heating Weeks (DHW). This vector allows you to identify which Indonesian MPAs might act as thermal refugia for coral reefs.
description: Shapefile with the average year of onset of annual severe bleaching (ASB) events in all the marine protected areas (MPAs) of Indonesia designated in January 2020.
DOI: 10.1594/pangaea.904573
title: Trace element ratios of nearshore Porites coral from Ward Island (1995-2001)

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.931913
title: Diatom assemblages excluding Chaetoceros resting spores of sediment core JPC43 in Neny Fjord, Antarctic Peninsula

description: Diatom abundance and assemblage data are presented for JPC43 - a ~12 m marine sediment core recovered from 576 m water depth in Neny Fjord, Marguerite Bay, Antarctic Peninsula (68.2571°S, 66.9617°W). The core was collected aboard the RVIB Nathanial B Palmer in 2002 during the NBP0201 scientific cruise (PI: Prof J B Anderson) to determine the timing of deglaciation in the fjords of the Antarctic Peninsula. The core record spans the Holocene with samples dated using an age model based on 5 reliable radiocarbon dates. Relative abundance of diatom taxa are based on counts (mean=363.1 valves) excluding Chaetoceros resting spores (CRS) - 'CRS-free counts' (n=66). The relevant methods are described and referenced in the associated publication (Allen et al. 2010).
DOI: 10.1594/pangaea.918162
title: Charcoal and pollen analysis of sediment core WQ-1
DOI: 10.1594/pangaea.904570
title: Trace element ratios of offshore Porites coral from Tantabiddi Reef (2004-2013)

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.949766
title: Thorium-230 dating of speleothems WB-21-5-A and WA-21-6-A

description: The dataset includes speleothem U-Th ages used to reconstruct climate in southeastern Alaska during the past ~3,500 years. Speleothem WB-21-5-A was collected in Wishbone Cave (55.774 N, -133.191 E; 420 m.a.s.l.) and speleothem WA-21-6-A was collected in Walkabout Cave (55.776° N, 133.195° W; 350 m.a.s.l.) on May 21, 2022 and June 21, 2022, respectfully. The data collection was completed between September 2021-March 2022. U-Th ages were measured on a ThermoFisher Neptune Plus multi-collector inductively coupled plasma mass spectrometer.
description: U decay constants: l238 = 1.55125x10-10 (Jaffey et al., 1971) and l234 = 2.82206x10-6 (Cheng et al., 2013).Th decay constant: l230 = 9.1705x10-6 (Cheng et al., 2013).* d234U = ([234U/238U]activity – 1)x1000d234Uinitial was calculated based on 230Th age (T), i.e., d234Uinitial = d234Umeasured x el234xT.** Corrected 230Th ages assume the initial 230Th/232Th atomic ratio of 4.4 ±2.2 x10-6. Those are the values for a material at secular equilibrium, with the bulk earth 232Th/238U value of 3.8. The errors are arbitrarily assumed to be 50%.*** B.P. stands for “Before Present” where the “Present” is defined as the year 1950 CE.
DOI: 10.1594/pangaea.904562
title: Trace element ratios of nearshore Porites coral from Bundegi Reef (2005-2013)

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.914591
title: Experiment on performance of two invertebrate predators on warming and temperature variability: Size and mass of Hemigrapsus takanoi and Asterias rubens

description: Size and weight of H. takanoi and A. rubens during the experimental period (72 and 64 days, respectively) measured under 4 temperature conditions: ambient ('constant'), warm ('constant'), ambient sinusoidal and warm sinusoidal. The experiments were conducted from July to September 2017 in the Kiel Indoor Benthocosms (KIBs), at GEOMAR Kiel, Germany. Wet and dry weight (g) were quantified at the start (July 12th) and at the end of the experiment (September 21st (day 72) for A. rubens and on September 14th (day 64) for H. takanoi). For this, individuals were weighed after gently blotting dry with a tissue. At the end of the experimental period, all individuals of both species were frozen (6 hours at -20°C), and dried (48hours, 80°C), and weighted to estimate dry weight.
DOI: 10.1594/pangaea.949774
title: Hydrogen isotope data from speleothem WB-21-5-A used for the paleotemperature reconstruction

description: The dataset includes speleothem fluid inlcusion hydrogen isotopes used to reconstruct climate in southeastern Alaska during the past ~3,500 years. Speleothem WB-21-5-A was collected in Wishbone Cave (55.774 N, -133.191 E; 420 m.a.s.l.) on May 21, 2022. The data collection was completed between September 2021-March 2022. Stable/fluid inclusion isotopes were measured on a ThermoFisher Delta V isotope ratio mass spectrometer.
DOI: 10.15468/dl.ag2aet
title: Occurrence Download

description: A dataset containing 5 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Macrogynoplax matogrossensis",
 "DecimalLatitude is not null",
 "DecimalLongitude is not null"
 ]
}

 The dataset includes 5 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0030941-260208012135463/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.904131
title: Temporal inventory of glaciers in the Suru sub-basin, western Himalaya

description: Updated knowledge about the glacier extent and characteristics in the Himalaya cannot be overemphasised. Availability of precise glacier inventories in the latitudinally diverse western Himalayan region is particularly crucial. In this study we have created an inventory of the Suru sub-basin, western Himalaya for year 2017 using Landsat OLI data. Changes in glacier parameters have also been monitored from 1971 to 2017 using temporal satellite remote sensing data and limited field observations. Inventory data shows that the sub-basin has 252 glaciers covering 11% of the basin, having an average slope of 25 ±6° and dominantly north orientation. The average snow line altitude (SLA) of the basin is 5011 ±54 masl with smaller (47%) and cleaner (43%) glaciers occupying the bulk area. Longterm climate data (1901-2017) shows an increase in the mean annual temperature (Tmin & Tmax) by 0.77 ºC (0.25 & 1.3 ºC) in the sub-basin, driving the overall glacier variability in the region. Temporal analysis reveals a glacier shrinkage of ~6 ±0.02 %, an average rate of 4.3 ±1.02 ma-1, debris increase of 62% and 22 ±60 m SLA rise in past 46 years. This confirms their transitional response between the Karakoram and the Greater Himalayan Range (GHR) glaciers. Besides, glaciers in the sub-basin occupy two major ranges, i.e., GHR and Ladakh range (LR) and experience local climate variability, with the GHR glaciers exhibiting a warmer and wetter climate as compared to the LR glaciers. This variability manifestes itself in the varied response of GHR and LR glaciers. While the GHR glaciers exhibit an overall rise in SLA (GHR: 49 ±69 m; LR: decrease by 18 ±50 m), the LR glaciers have deglaciated more (LR: 7 %; GHR: 6 %) with an enhanced accumulation of debris cover (LR: 73%; GHR: 59 %). Inferences from this study reveal prevalence of glacier disintegration and overall degeneration, transition of clean ice to partially debris covered glaciers, local climate variability and non-climatic (topographic and morphometric) factor induced heterogeinty in glacier response as the major processes operatives in this region.
DOI: 10.1594/pangaea.949775
title: Stable oxygen and carbon isotope ratios of speleothem WA-21-6-A

description: The dataset includes speleothem carbon isotopes and oxygen isotopes used to reconstruct climate in southeastern Alaska during the past ~3,500 years. Speleothem WA-21-6-A was collected in Walkabout Cave (55.776° N, 133.195° W; 350 m.a.s.l.) on June 21, 2022. The data collection was completed between September 2021-March 2022. Stable isotopes were measured on a ThermoFisher Delta V isotope ratio mass spectrometer.
DOI: 10.1594/pangaea.903523
title: Mannitol in Laminaria solidungula and Saccharina latissima from Kongsfjorden, Spitsbergen, during the polar night 2016/17
DOI: 10.1594/pangaea.914817
title: Experiment on performance of two invertebrate predators on warming and temperature variability: Experimental treatments measurements

description: Temperatures (ºC) measured manually with a thermocouple thermometer with fixed probe (ebro TTX 110 type T, Ingolstadt, Germany) inside the 2L experimental units in the Kiel Indoor Benthocosms tanks for the four temperature treatments: ambient ('constant'), warm ('constant'), ambient sinusoidal and warm sinusoidal. Measures were taken every second day during the experimental period from July to September 2017.
DOI: 10.1594/pangaea.911132
title: Response of the microbial food web to gradients of organic matter and grazing pressure effect in incubation experiments in the Arctic: Mesocosm

description: Zooplankton treatment: HZ: zooplankton added, LZ: Zooplankton removedCarbon treatment: 0C: No glucose addition, 0.5: 0.5 x Redfield. 1: 1xRedfield, 2: 2xRedfield, 3: 3XRedfield
DOI: 10.1594/pangaea.903525
title: Respiration in Laminaria solidungula and Saccharina latissima from Kongsfjorden, Spitsbergen, during the polar night 2016/17
DOI: 10.1594/pangaea.942768
title: KOSMOS Bergen 2015 mesocosm study: plankton abundances

description: To evaluate the influence of episodic extreme ocean acidification events in coastal regions, we deployed eight pelagic mesocosms for 53 days (Mai to July) in Raunefjord, Norway, and enclosed 60 m³ of local seawater containing a natural plankton community under post-bloom conditions. Four mesocosms were manipulated to simulate extreme pCO2 levels of 2069 µatm while the other four served as untreated controls. To monitor the effects of extreme pCO2 conditions, a variety of planktonic organisms inside and outside the mesocosms were measured over the course of the experiment in regular intervals. The data stems from 55µm and 500µm Apstein net hauls and subsequent microscopic analyses.
DOI: 10.1594/pangaea.954790
title: Lacustrine diatom oxygen isotopes as palaeo precipitation proxy of sediment core Co1321, Lake Bolshoye Shchuchye, Polar Urals, Russia

description: The dataset comprises the main geochemical characteristics of purified lake sediment samples from Lake Bolshoye Shchuchye, in the Polar Ural based on EDS and stable isotope data. Moreover, core segment (column A), composite depth (in cm; column B); calibrated age (in cal ka BP; column C) are given. Details on coring and age model are given in Lenz et al. (2021) Energy-Dispersive X-ray Spectroscopy (EDS) was carried out with a scanning electron microscope (SEM) at the German Research Centre for Geosciences (GFZ Potsdam, Germany) to assess contamination of all diatom samples (following Chapligin et al., 2012). Three replicate analyses were carried out with an excited-area size with a radius of ~200 μm at an acceleration voltage of 20.0 kV. All detectable elements were normalized to 100% weight. The results were expressed as weight percentages (in %) and displayed as oxides: SiO2 content (%); Al2O3 content (%); Na2O content (%); MgO content (%); K2O content (%); CaO content (%); MnO content (%); FeO content (%): Total sum (%) of the purified sediment sample (columns D to L). Details are given in Meyer et al. (2022) The diatom oxygen isotope composition (δ18Odiatom) from lacustrine sediments helps tracing the hydrological and climate dynamics in individual lake catchments. The oxygen isotope data has been generated in the ISOLAB Facility Potsdam including all d18Odiatom values (all in ‰ vs. VSMOW). The measured δ18O values (δ18Omeas), the standard deviation (SD) and number of replicates (N) are given (columns M to O), as well as the calculated contamination (ccont; in %) and δ18O values corrected for contamination (δ18Ocorr) (columns P to Q). The details of the contamination correction and isotope analytics are given in Meyer et al. (2022)
DOI: 10.1594/pangaea.951430
title: Wege in Ausbildung und Ausbildungslosigkeit. Bedingungen gelingender und misslingender Übergänge in Ausbildung von Jugendlichen mit Hauptschulbildung. Transkripte der Interviews der qualitativen Erhebung

description: DE: Der vorliegende Datensatz umfasst 56 Transkripte von Interviews mit ehemaligen Hauptschüler*innen aus dem Projekt "Wege in Ausbildung und Ausbildungslosigkeit. Bedingungen gelingender und misslingender Übergänge in Ausbildung von Jugendlichen mit Hauptschulbildung". Die Datengrundlage bildet das DJI Übergangspanel, aus dem per theoretischem Sampling zwei Teilstichproben gebildet wurden. Die erste Untersuchungsgruppe setzt sich aus jungen Erwachsenen zusammen, die keine Berufsausbildung beginnen und/oder abschließen konnten und sich rund fünf Jahre nach Ende der Pflichtschulzeit auf dem Weg in die Ausbildungslosigkeit befinden. Die zweite Untersuchungsgruppe bilden junge Erwachsene, die die erste Schwelle bewältigt und damit eine Berufsausbildung begonnen und teilweise bereits abgeschlossen haben. Inhalt der Interviews ist eine retrospektive Sicht der jungen Erwachsenen auf ihre bisherigen Übergangswege, wobei ein besonderes Augenmerk auf Veränderungen und Entscheidungssituationen in ihren Übergangswegen gelegt wurde. Zeitlich knüpft das Interview am Ende des berufsvorbereitenden Angebots an. Die Interviewtranskripte sowie Kontextmaterialien stehen für die wissenschaftliche Nachnutzung in Forschung und Lehre zur Verfügung.EN: This dataset comprises 56 transcripts of interviews with former lower secondary general school pupils from the project "Pathways to training and lack of training. Conditions of successful and unsuccessful transitions into training for young people with a lower secondary school education". The data basis is the DJI Transition Panel, from which two sub-samples were formed using theoretical sampling. The first study group consists of young adults who were unable to start and complete vocational training and are on the path to becoming unemployed around five years after completing compulsory schooling. The second research group comprises young adults who have overcome the first threshold and have therefore started and, in some cases, already completed vocational training. The content of the interviews is a retrospective view of the young adults on their previous transition paths, with a particular focus on changes and decision-making situations in their transition paths. In terms of time, the interview picks up at the end of the pre-vocational programme. The interview transcripts and context materials are available for scientific reuse in research and teaching.