cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.982993
title: ALLena: Thaw depth measurements of the active layer in the Lena River Delta region from 1998 to 2022, Northeastern Siberia, detailed table 'Detailed_data_TD_Minke'

description: Active layer thickness (ALT) is one of currently two Essential Climate Variables related directly to permafrost regions as defined by the Global Climate Observing System (GCOS) at the World Meteorological Organization (WMO). ALT is determined as the maximum thaw depth at the end of the thawing season and is being monitored across the Arctic to better understand climate change impacts on landscape, permafrost, hydrology, vegetation, and soil biogeochemistry. In addition, spatially and/or temporally distributed measurements of thaw depth (TD) in the active layer during the thawing period are often recorded during field work in permafrost regions for various research purposes and process understanding. The ALLena dataset presents a compilation of thaw depth (TD) measurements of the active layer in the Lena River Delta region based on published and unpublished field data collected during Russian and joint German-Russian expeditions from 1998 to 2022. The dataset contains data from different areas of the Lena Delta region with clustering in research-intensive areas, e.g. in the vicinity of Research Station Samoylov Island, but also includes sites adjacent to the delta such as Muostakh Island, Bykovsky Peninsula and Tiksi settlement surroundings. The compiled data is distributed across various ecosystems and geomorphological units underlain by different types of deposits and characterized by various relief positions, microtopography, soil and vegetation cover (e.g. active floodplains, polygonal tundra on Holocene Lena Delta terraces, remnants of Yedoma Ice Complex, etc.). TD measurements were conducted as opportunistic single as well as targeted TD transects or grid measurements. For some sites measurements of TD were repeated at the same locations in different years. TD was measured one time per site or several times per site within a few centimeters to several meters to capture small-scale heterogeneity depending on e.g. microcrotopography or vegetation type. The main datatable (doi:10.1594/PANGAEA.973813) contains discrete TD values if they were measured one to three times per site. In case of more than three TD values per measurement site, the main datatable provides the minimum, maximum, and mean TD as well as the number of measurements that were averaged. For sites with more than three TD measurements per site, separate detailed tables like this one are provided. The dataset presents a highly valuable compilation of TD data over a uniquely large Arctic region and long time span. It might complement the Circumpolar Active Layer Monitoring (CALM) program and other published ALT and TD datasets for other permafrost regions and may be used for e.g. parametrization or validation of permafrost modelling and remote sensing studies.
DOI: 10.1594/pangaea.983062
title: ALLena: Thaw depth measurements of the active layer in the Lena River Delta region from 1998 to 2022, Northeastern Siberia, detailed table 'Detailed_data_TD_Nitzbon'

description: Active layer thickness (ALT) is one of currently two Essential Climate Variables related directly to permafrost regions as defined by the Global Climate Observing System (GCOS) at the World Meteorological Organization (WMO). ALT is determined as the maximum thaw depth at the end of the thawing season and is being monitored across the Arctic to better understand climate change impacts on landscape, permafrost, hydrology, vegetation, and soil biogeochemistry. In addition, spatially and/or temporally distributed measurements of thaw depth (TD) in the active layer during the thawing period are often recorded during field work in permafrost regions for various research purposes and process understanding. The ALLena dataset presents a compilation of thaw depth (TD) measurements of the active layer in the Lena River Delta region based on published and unpublished field data collected during Russian and joint German-Russian expeditions from 1998 to 2022. The dataset contains data from different areas of the Lena Delta region with clustering in research-intensive areas, e.g. in the vicinity of Research Station Samoylov Island, but also includes sites adjacent to the delta such as Muostakh Island, Bykovsky Peninsula and Tiksi settlement surroundings. The compiled data is distributed across various ecosystems and geomorphological units underlain by different types of deposits and characterized by various relief positions, microtopography, soil and vegetation cover (e.g. active floodplains, polygonal tundra on Holocene Lena Delta terraces, remnants of Yedoma Ice Complex, etc.). TD measurements were conducted as opportunistic single as well as targeted TD transects or grid measurements. For some sites measurements of TD were repeated at the same locations in different years. TD was measured one time per site or several times per site within a few centimeters to several meters to capture small-scale heterogeneity depending on e.g. microcrotopography or vegetation type. The main datatable (doi:10.1594/PANGAEA.973813) contains discrete TD values if they were measured one to three times per site. In case of more than three TD values per measurement site, the main datatable provides the minimum, maximum, and mean TD as well as the number of measurements that were averaged. For sites with more than three TD measurements per site, separate detailed tables like this one are provided. The dataset presents a highly valuable compilation of TD data over a uniquely large Arctic region and long time span. It might complement the Circumpolar Active Layer Monitoring (CALM) program and other published ALT and TD datasets for other permafrost regions and may be used for e.g. parametrization or validation of permafrost modelling and remote sensing studies.
DOI: 10.1594/pangaea.983063
title: ALLena: Thaw depth measurements of the active layer in the Lena River Delta region from 1998 to 2022, Northeastern Siberia, detailed table 'Detailed_data_TD_Schwamborn'

description: Active layer thickness (ALT) is one of currently two Essential Climate Variables related directly to permafrost regions as defined by the Global Climate Observing System (GCOS) at the World Meteorological Organization (WMO). ALT is determined as the maximum thaw depth at the end of the thawing season and is being monitored across the Arctic to better understand climate change impacts on landscape, permafrost, hydrology, vegetation, and soil biogeochemistry. In addition, spatially and/or temporally distributed measurements of thaw depth (TD) in the active layer during the thawing period are often recorded during field work in permafrost regions for various research purposes and process understanding. The ALLena dataset presents a compilation of thaw depth (TD) measurements of the active layer in the Lena River Delta region based on published and unpublished field data collected during Russian and joint German-Russian expeditions from 1998 to 2022. The dataset contains data from different areas of the Lena Delta region with clustering in research-intensive areas, e.g. in the vicinity of Research Station Samoylov Island, but also includes sites adjacent to the delta such as Muostakh Island, Bykovsky Peninsula and Tiksi settlement surroundings. The compiled data is distributed across various ecosystems and geomorphological units underlain by different types of deposits and characterized by various relief positions, microtopography, soil and vegetation cover (e.g. active floodplains, polygonal tundra on Holocene Lena Delta terraces, remnants of Yedoma Ice Complex, etc.). TD measurements were conducted as opportunistic single as well as targeted TD transects or grid measurements. For some sites measurements of TD were repeated at the same locations in different years. TD was measured one time per site or several times per site within a few centimeters to several meters to capture small-scale heterogeneity depending on e.g. microcrotopography or vegetation type. The main datatable (doi:10.1594/PANGAEA.973813) contains discrete TD values if they were measured one to three times per site. In case of more than three TD values per measurement site, the main datatable provides the minimum, maximum, and mean TD as well as the number of measurements that were averaged. For sites with more than three TD measurements per site, separate detailed tables like this one are provided. The dataset presents a highly valuable compilation of TD data over a uniquely large Arctic region and long time span. It might complement the Circumpolar Active Layer Monitoring (CALM) program and other published ALT and TD datasets for other permafrost regions and may be used for e.g. parametrization or validation of permafrost modelling and remote sensing studies.
DOI: 10.5281/zenodo.17744696
title: ТЕОРЕТИЧЕСКИЕ АСПЕКТЫ ПОНЯТИЯ «КОМПОЗИТ» В СОВРЕМЕННОЙ РУСИСТИКЕ
DOI: 10.5281/zenodo.17744697
title: ТЕОРЕТИЧЕСКИЕ АСПЕКТЫ ПОНЯТИЯ «КОМПОЗИТ» В СОВРЕМЕННОЙ РУСИСТИКЕ
DOI: 10.1594/pangaea.984577
title: Raw data of air hydrate properties of the EDML ice core

description: In the deeper part of polar ice sheets, air hydrates are the primary air inclusions. They trap most of the ancient air molecules used for paleoclimatic reconstructions in their crystal structure. Furthermore, their number and size was found to correlate with past climate. This dataset presents the raw data of air hydrate parameters of the EPICA Dronning Maud Land (EDML) ice core from 1255 m to 2771 m depth. Air hydrate parameters were measured and analyzed in 74 ice thick section microphotographs using digital image analysis. The images were analyzed by Florian Painer at the Alfred Wegener Institute, Bremerhaven and the analysis routines were implemented in Python using open-source libraries. The aim was to develop a semi-automated analysis routine and to provide a high-resolution record of air hydrate properties of the EDML ice core. In total, about 183.000 air hydrates were segmented from the microphotographs and analyzed using digital image analysis. The microphotographs were obtained in the years 2002 - 2006 during the Antarctic field season, shortly after the sample was drilled, using an optical microscope (Kipfstuhl et al., 2006; Kipfstuhl, 2007).
description: The individual files contain the following variables:- Region label: A region consists of connected pixels. For instance, a segmented air hydrate.- Area: Number of pixels of the region.- Diameter of area-equivalent circle: Diameter of a circle with the same area as the region.- Perimeter: According to scikit-image (0.24.0) conventions.- 0-coordinate of centroid: Coordinate according to scikit-image (0.24.0) conventions. Corresponds to "Y" in a Cartesian coordinate system with the origin in the top left corner of the image.- 1-coordinate of centroid: Coordinate according to scikit-image (0.24.0) conventions. Corresponds to "X" in a Cartesian coordinate system with the origin in the top left corner of the image.- Minor axis: Of a fitted ellipse according to scikit-image (0.24.0) conventions.- Major axis: Of a fitted ellipse according to scikit-image (0.24.0) conventions.- Eccentricity: Of a fitted ellipse according to scikit-image (0.24.0) conventions.- Orientation: Of the major axis of a fitted ellipse according to scikit-image (0.24.0) conventions. Convert to "real angle" in degrees using: real angle = orientation * (180/pi) + 90- Mean gray value: Mean gray value of the region.- Circularity: Circularity = (4*pi*Area) / (Perimeter**2). A value of 1 would equal a perfect circle.
DOI: 10.1594/pangaea.964590
title: Mean leaf area of macroalgae collected at Hansneset, Kongsfjorden, Spitsbergen in 2012 and 2021

description: The leaf area of macroalgae was surveyed at Hansneset, Blomstrand in Kongsfjorden, Svalbard, from the 2.5 m down to 15 m depth in summer 2012 and 2021. Our goal was to document changes in Arctic kelp forests dynamics in an Arctic fjord system influenced by glacial melt by repeatedly sampling the same site in a standardized manner. As ocean temperatures in the Arctic have risen substantially and underwater light climate continuously deteriorated over this time period we observed alterations in the seaweed community, especially kelps as major coastal foundation species.This data contains the leaf area index measurements (leaf area [m²]) per species per quadrat (Replicate) at a series of specific depths (Depth [m]) for the years 2012 and 2021 taken at Hansneset, Kongsfjorden, Svalbard. Within the species column there is a 'Digitate kelps' value. This is due to the complication of the visual similarity of Laminaria digitata and Hedophyllum nigripes. Because these are field data, and the distinction between these species requires genetic lab work, the exact species identification is not possible so they are listed with the WORMS code for Laminariales. Historically these kelps were considered Laminaria digitata.
DOI: 10.1594/pangaea.984580
title: Summary of air hydrate properties of the EDML ice core

description: In the deeper part of polar ice sheets, air hydrates are the primary air inclusions. They trap most of the ancient air molecules used for paleoclimatic reconstructions in their crystal structure. Furthermore, their number and size was found to correlate with past climate. This dataset presents a summary of air hydrate parameters of the EPICA Dronning Maud Land (EDML) ice core from 1255 m to 2771 m depth. Air hydrate parameters were measured and analyzed in 74 ice thick section microphotographs using digital image analysis. The images were analyzed by Florian Painer at the Alfred Wegener Institute, Bremerhaven and the analysis routines were implemented in Python using open-source libraries. The aim was to develop a semi-automated analysis routine and to provide a high-resolution record of air hydrate properties of the EDML ice core. The microphotographs were obtained in the years 2002 - 2006 during the Antarctic field season, shortly after the sample was drilled, using an optical microscope (Kipfstuhl et al., 2006; Kipfstuhl, 2007).
DOI: 10.1594/pangaea.947492
title: Calcium carbonate from the Il-Blata section, Malta Island (S3)
DOI: 10.1594/pangaea.947471
title: 87Sr/86Sr values and age determination from the Il-Blata section, Malta Island (S1)
DOI: 10.1594/pangaea.947507
title: Bulk δ18O and δ13C values from the Il-Blata section, Malta Island (S4)
DOI: 10.1594/pangaea.947476
title: εNd data from the Il-Blata section, Malta Island (S2)

description: *: Ages retuned in this study
DOI: 10.1594/pangaea.947535
title: XRF-elemental analysis and element ratios from the Il-Blata section, Malta Island (S5)
DOI: 10.1594/pangaea.947546
title: Mean Aluminium normalized element ratios under three different climatic regimes from the Il-Blata section, Malta Island (S6)
DOI: 10.1594/pangaea.986465
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507240401 in 1 sec resolution (zipped, 546 KB)
DOI: 10.1594/pangaea.986466
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507210301 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986467
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508101301 in 1 sec resolution (zipped, 854 KB)
DOI: 10.1594/pangaea.986471
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507270501 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986473
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507290701 in 1 sec resolution (zipped, 769 KB)
DOI: 10.1594/pangaea.986475
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508091201 in 1 sec resolution (zipped, 977 KB)
DOI: 10.1594/pangaea.986477
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508081101 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986480
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507280601 in 1 sec resolution (zipped, 1014 KB)
DOI: 10.1594/pangaea.986484
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2507200201 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986486
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508031001 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986488
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508020901 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986489
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508121401 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986490
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2508010801 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986492
title: Master track from POLAR 5 flight P5-258_PERMA-X_2025_2506270101 (test flight) in 1 sec resolution (zipped, 267 KB)
DOI: 10.1594/pangaea.986659
title: Oxygen profiles data of surface sediments retrieved from two fjords in South Georgia, sub-Antarctica

description: During the PS133/2 research cruise with the German research vessel RV Polarstern in the austral summer of November and December 2022 into the Southern Ocean, sediment samples were collected using a multicorer at five stations and a handheld gravity corer (UWITEC) from a zodiac at two additional stations across two fjords in South Georgia: King Haakon Bay and Cumberland Bay. The main objective was to determine and quantify the different sources and transport pathways of iron from two fjords of South Georgia into the open ocean. A high resolution O2 profile was measured in five MUC cores using a fibre-optic oxygen microsensor (Pyroscience) to determine the oxygen penetration depths.
DOI: 10.1594/pangaea.986660
title: Pore-water data of surface sediments retrieved from two fjords in South Georgia, sub-Antarctica

description: During the PS133/2 research cruise with the German research vessel RV Polarstern in the austral summer of November and December 2022 into the Southern Ocean, sediment samples were collected using a multicorer at five stations and a handheld gravity corer (UWITEC) from a zodiac at two additional stations across two fjords in South Georgia: King Haakon Bay and Cumberland Bay. The main objective was to determine and quantify the different sources and transport pathways of iron from two fjords of South Georgia into the open ocean. The MUC cores were sliced into 1-2 cm segments down to a maximum depth of 30 cm. Adjacent sediment cores were cut at the same depth resolution. Pore-water analyses were conducted for nitrite (NO2-), nitrate (NO3-), silicate (SiO2), phosphate (PO4³-), ammonium (NH4+), dissolved inorganic carbon (DIC), chloride (Cl-), sulfate (SO42-), hydrogen sulfide (H2S), alkalinity, dissolved Fe (dFe) and dissolved manganese (dMn). Surface sediment pore-water samples were analyzed for their iron isotopic composition (δ56Fe) at 6 stations
DOI: 10.1594/pangaea.986661
title: Solid phase data of surface sediments retrieved from two fjords in South Georgia, sub-Antarctica

description: During the PS133/2 research cruise with the German research vessel RV Polarstern in the austral summer of November and December 2022 into the Southern Ocean, sediment samples were collected using a multicorer at five stations and a handheld gravity corer (UWITEC) from a zodiac at two additional stations across two fjords in South Georgia: King Haakon Bay and Cumberland Bay. The main objective was to determine and quantify the different sources and transport pathways of iron from two fjords of South Georgia into the open ocean. For the determination of an age model and the porosity, at five stations excess 210Pb (210PbXS) was measured using freeze-dried sediment samples. At six stations 0.5 M HCl extractions were performed to determine the 0.5 M HCl-extractable Fe(III)s (bound in poorly crystalline Fe-oxides) and Fe(II)s (bound in acid volatile sulfide). Samples of the same stations were used to obtain sulfate reduction rates (SRR).
DOI: 10.15468/dl.yxyad9
title: Occurrence Download

description: A dataset containing 19886 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is China",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Muntiacus reevesi"
 ]
}

 The dataset includes 19886 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0013196-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.986861
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2506270101 (test flight) in 1 sec resolution (zipped, 465 KB)
DOI: 10.1594/pangaea.986863
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2507140201 (test flight) in 1 sec resolution (zipped, 424 KB)
DOI: 10.1594/pangaea.986865
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2507220301 in 1 sec resolution (zipped, 963 KB)
DOI: 10.1594/pangaea.986867
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2507230401 in 1 sec resolution (zipped, 367 KB)
DOI: 10.1594/pangaea.986868
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2507310601 in 1 sec resolution (zipped, 904 KB)
DOI: 10.1594/pangaea.986869
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2507300501 in 1 sec resolution (zipped, 939 KB)
DOI: 10.1594/pangaea.986871
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508030701 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986875
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508060801 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986877
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508110901 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986879
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508211301 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986881
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508181001 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986882
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508191101 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.986884
title: Master track from POLAR 6 flight P6-259_IceBird_Summer_2025_2508201201 in 1 sec resolution (zipped, 1 MB)
DOI: 10.1594/pangaea.987089
title: δ18O and δ13C stable isotope data from a new composite sediment record, Cyprus (Eastern Mediterranean)

description: We present a c. 12 Ma record of oxygen and carbon stable isotopes from the Island of Cyprus to help constrain the nature and extent of Miocene palaeoceanographic changes in the eastern Mediterranean region. Cyprus includes Neogene deep-sea pelagic sedimentary rocks, which are suitable for stable isotope studies. Our composite geochemical record integrates data from the Lower-Upper Miocene succession at Kottaphi Hill along the northern margin of the Troodos ophiolite, and the Upper Miocene succession at Lapatza Hill to the south of the Kyrenia Range. Calcareous nannofossil biostratigraphy reveals that the composite record spans the Miocene Climatic Optimum's onset to the beginning of the Messinian Salinity Crisis.
DOI: 10.1594/pangaea.987120
title: Ultra-violet measurements from station Selegua (2025-08)
DOI: 10.1594/pangaea.987121
title: Ultra-violet measurements from station Selegua (2025-09)
DOI: 10.1594/pangaea.987122
title: Basic and other measurements of radiation at station Selegua (2025-09)
DOI: 10.1594/pangaea.987123
title: Basic and other measurements of radiation at station Selegua (2025-08)