cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.871501
title: HiRSvaC500-alpha (High Resolution Svalbard Climatology, 500 m, glacier albedo), links to data files in NetCDF format

description: Albedo is an important quantity for determining the energy balance of snow and ice surfaces and thus also for the mass balance of glaciers. It is especially important in polar regions where shortwave radiation fluxes typically provide most of the energy input to a glacier. In order to use albedo data in any spatially distributed glaciological modeling, it is vital that the albedo fields are not only of high accuracy, but also available on sufficiently high spatial resolution and in a manner that is consistent over time. This article presents the newly developed data set HiRSvaC500-alpha which provides daily updated, gapless albedo fields for all glacierized areas of the Arctic archipelago Svalbard on a 500 m resolution over the period 1979–2015. Albedo modeling for creation of the data set is done using a multi-step geostatistical approach on the basis of remotely-sensed Moderate Resolution Imaging Spectroradiometer (MODIS) albedo data and gridded ERA-Interim climate data. Validation of the modeled HiRSvaC500-alpha albedo fields against in situ albedo measurements at automatic weather stations operated on two different glaciers suggests that the accuracy of the newly developed data set lies close to that of remotely-sensed MODIS albedo data. An analysis of the HiRSvaC500-alpha albedo data set yields a mean annual-average albedo of 0.754 across all glaciers of Svalbard over 1979–2015. A decrease of albedo with time is found, following a highly significant (95% level) trend of -0.010 per decade. For certain subregions, this trend even reaches up to -0.014 per decade.
description: The dataset provides gapless, daily albedo fields on a 500 m grid over all glacierized areas of Svalbard over the period 1979-09-01 to 2015-08-31. Data are provided in annual sets as NetCDF files (~1.3GB each).
description: Supplement to: Möller, Marco; Möller, Rebecca (2017): Modeling glacier-surface albedo across Svalbard for the 1979-2015 period: The HiRSvaC500-alpha data set. Journal of Advances in Modeling Earth Systems, 9, 19 pp
DOI: 10.1594/pangaea.665387
title: Oceanography at CTD/bottle station IFREMER_2227
DOI: 10.1594/pangaea.830602
title: (Tabls S1) Bulk geochemistry for sediment samples collected from the Cenomanian-Turonian boundary section at Pont d'Issole

description: Oceanic Anoxic Event 2 (OAE2), spanning the Cenomanian-Turonian boundary (CTB), represents one of the largest perturbations in the global carbon cycle in the last 100 Myr. The d13Ccarb, d13Corg, and d18O chemostratigraphy of a black shale-bearing CTB succession in the Vocontian Basin of France is described and correlated at high resolution to the European CTB reference section at Eastbourne, England, and to successions in Germany, the equatorial and midlatitude proto-North Atlantic, and the U.S. Western Interior Seaway (WIS). Delta13C (offset between d13Ccarb and d13Corg) is shown to be a good pCO2 proxy that is consistent with pCO2 records obtained using biomarker d13C data from Atlantic black shales and leaf stomata data from WIS sections. Boreal chalk d18O records show sea surface temperature (SST) changes that closely follow the Delta13C pCO2 proxy and confirm TEX86 results from deep ocean sites. Rising pCO2 and SST during the Late Cenomanian is attributed to volcanic degassing; pCO2 and SST maxima occurred at the onset of black shale deposition, followed by falling pCO2 and cooling due to carbon sequestration by marine organic productivity and preservation, and increased silicate weathering. A marked pCO2 minimum (~25% fall) occurred with a SST minimum (Plenus Cold Event) showing &gt;4°C of cooling in ~40 kyr. Renewed increases in pCO2, SST, and d13C during latest Cenomanian black shale deposition suggest that a continuing volcanogenic CO2 flux overrode further drawdown effects. Maximum pCO2 and SST followed the end of OAE2, associated with a falling nutrient supply during the Early Turonian eustatic highstand.
description: SECTION, heigh [m] gives the measured stratigraphic height above base of measured section.
description: Supplement to: Jarvis, Ian; Lignum, John S; Gröcke, Darren R; Jenkyns, Hugh C; Pearce, Martin A (2011): Black shale deposition, atmospheric CO2 drawdown, and cooling during the Cenomanian-Turonian Oceanic Anoxic Event. Paleoceanography, 26(3), PA3201
DOI: 10.1594/pangaea.858541
title: Ceilometer raw data measured at Neumayer Station (2015-07), links to files
DOI: 10.1594/pangaea.871962
title: Climatological distributions of δ¹³C of dissolved inorganic carbon in the global oceans deeper than 200 m
DOI: 10.1594/pangaea.867329
title: Diatom sequences

description: The Arctic treeline ecotone is characterized by a steep vegetation gradient from arctic tundra to northerntaiga forests, which is thought to influence the water chemistry of thermokarst lakes in this region.Environmentally sensitive diatoms respond to such ecological changes in terms of variation in diatomdiversity and richness, which so far has only been documented by microscopic surveys. We applied nextgenerationsequencing to analyse the diatom composition of lake sediment DNA extracted from 32 lakesacross the treeline in the Khatanga region, Siberia, using a short fragment of the rbcL chloroplast gene as agenetic barcode. We compared diatom richness and diversity obtained from the genetic approach withdiatom counts from traditional microscopic analysis. Both datasets were employed to investigate diversityand relationships with environmental variables, using ordination methods. After effective filtering of theraw data, the two methods gave similar results for diatom richness and composition at the genus level(DNA 12 taxa; morphology 19 taxa), even though there was a much higher absolute number of sequencesobtained per genetic sample (median 50,278), compared with microscopic counts (median 426). Dissolvedorganic carbon explained the highest percentage of variance in both datasets (14.2 % DNA; 18.7 %morphology), reflecting the compositional turnover of diatom assemblages along the tundra-taigatransition. Differences between the two approaches are mostly a consequence of the filtering process ofgenetic data and limitations of genetic references in the database, which restricted the determination ofgenetically identified sequence types to the genus level. The morphological approach, however, allowedidentifications mostly to species level, which permits better ecological interpretation of the diatom data.Nevertheless, because of a rapidly increasing reference database, the genetic approach with sediment DNAwill, in the future, enable reliable investigations of diatom composition from lake sediments that will havepotential applications in both paleoecology and environmental monitoring.
description: Excel file contains genetically identified sequence types, their abundances, their similarity to Genbank references, their taxonomic identity and their DNA sequence.
description: Supplement to: Dulias, Katharina; Stoof-Leichsenring, Kathleen Rosmarie; Pestryakova, Luidmila A; Herzschuh, Ulrike (2016): Sedimentary DNA versus morphology in the analysis of diatom-environment relationships. Journal of Paleolimnology, 16 pp
DOI: 10.1594/pangaea.874098
title: Ceilometer raw data measured at Neumayer Station (2016-12), links to files
DOI: 10.1594/pangaea.818449
title: (Table 2) Selected major-element compositions of basalts used in fractionation calculations at DSDP Holes 64-475B and 64-477
DOI: 10.1594/pangaea.885844
title: XRF-core logger measurements from IODP Hole 365-C0010E
DOI: 10.1594/pangaea.820014
title: (Table 9) X-ray energy dispersive semi-quantitative analyses of clay minerals from selected samples at DSDP Hole 60-459B

description: Relative error = ±5% on 50% oxide; ±10% on 5-10%; ±20% on 5%. Empty cells = not analyzed.
DOI: 10.1594/pangaea.917103
title: 1-Hz PPP displacements at GEONET station 0928 during the 2011 Tohoku Mw9.0 earthquake
DOI: 10.1594/pangaea.906233
title: Tephra data of sediment core M72/5/22GC-8 (M72/5_640-1) from the Black Sea covering MIS 6 (184-130 ka BP)
DOI: 10.1594/pangaea.712804
title: Main and trace element geochemistry of sediment core POS158/1_0023/1
DOI: 10.1594/pangaea.830491
title: XRF-core logger measurements from IODP Hole 338-C0022B

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.818083
title: (Table 4) Geochemistry and minerals of glass at DSDP Site 65-483
DOI: 10.1594/pangaea.890786
title: Station data for marine litter survey at the seafloor of the SE North Sea
DOI: 10.1594/pangaea.854743
title: Carpolithes albolutum - NHMUK V68512 (Filmclip 39450 kb)

description: Video of digital x-ray tomograms in transverse section through fossil seed of Carpolithes albolutum nom. nov. S.Y. SM., M.E. COLLINSON, & BENEDICT (prev. identified as Alpinia) from the lower Eocene of the UK, NHMUK V68512.
DOI: 10.1594/pangaea.831438
title: Source area of grains analysed in sediment core POS175/1_9

description: Because 100 grains were analyzed in each depth and no depth had less than 56 grains matched, there is no need for weighted percentages.
DOI: 10.1594/pangaea.871716
title: Earthquake locations and coda-attenuation models at Campi Flegrei caldera (Italy) obtained using seismic data recorded during the 1983-84 volcanic unrest

description: Coda wave attenuation imaging is able to detect fluid/melt accumulation and ancient magmatic bodies in volcanoes. Here, we use recently-developed space-weighting sensitivity functions to invert for the spatial distributions of multi-frequency coda-wave attenuation, measured during the largest monitored unrest at Campi Flegrei caldera (1983-84). High-attenuation anomalies are spatially correlated with the regions of highest structural complexities and cross faulting. They characterise deep fluid circulation in and around the aseismic roots of the 1534 AD Mount Nuovo eruption and fluid accumulation in the areas of highest hydrothermal hazard. Just offshore Pozzuoli, and at the highest frequency (wavelengths of ~150 m), the main cause of ground deformation and seismicity during the unrest is an aseismic low-attenuation circular anomaly, similar in shape and nature to those produced by ancient magmatic reservoirs and active sills at other volcanoes.
description: 1. 1983/1984_loc3D_50_025_05.txt are earthquake location in the typical hypo71 format. These two files refer to two different years (1983/1984). They are obtained using the NonLinLoc software using a search grid algorithm, grid of 50 m node spacing. The output shows date and time origin of the earthquake, location in lat/long (degrees) and depth (km). In the study, the only other output mentioned is the RMS (seconds), the other parameters are in influent for the study.2. QcH and QcV are inverse coda quality factors modelled using horizontal (H) and vertical (V) seismic components of motion. First two components: WE and SN coordinates (UTM WGS84). The third column is a dummy. Columns 4-9 are the inverse Qc values for frequencies 3-6-9-12-15-18 Hz. Columns 10-11 are the input and output of the checkerboard test. The last column is the sensitivity function for a single source-receiver pair.
description: Supplement to: De Siena, Luca; Amoruso, Antonella; Del Pezzo, Edoardo; Wakeford, Zoë; Castellano, Mario; Crescentini, Luca (2017): Space-weighted seismic attenuation mapping of the aseismic source of Campi Flegrei 1983-84 unrest. Geophysical Research Letters
DOI: 10.1594/pangaea.848485
title: Lake bathymetry, Kurungnakh Island, Lena Delta

description: This data set provides lake bathymetry data for three lakes situated in a large thermokarst basin (alas) in the ice-rich permafrost deposits (Yedoma-type Ice Complex) of Kurungnakh Island, Lena Delta. It consists of three point shapefiles, one for each lake. In addition to the lake bathymetry points, the shapefiles contain shoreline points that delineate the lakes' boundaries.Bathymetry was measured along several profiles in August 2008 using a Garmin GPSmap 178c sounder and a handheld echo sounder on board a small non-motorized rubber boat. Shoreline points were measured using a ZEISS ELTA C30 tacheometer with an electro‐optical distance measurement device and were set to a lake depth of zero. The measurement method for each point is given in the attribute tables of the shapefile.
DOI: 10.1594/pangaea.854744
title: Carpolithes phoenixnordensis - MMG 10533b (mp4-Video 75902 kb)

description: Video of digital x-ray tomograms in longitudinal section through fossil seed of Carpolithes phoenixnordensis sp. nov. S.Y. SM., M.E. COLLINSON, & BENEDICT (prev. identified as Alpinia) from the upper Eocene of Germany, MMG 10533b.
DOI: 10.1594/pangaea.858006
title: Modelled niche centres and niche breadths of open ocean phytoplankton taxa

description: This data contains realized ecological niche estimates of phytoplankton taxa within the mixed layer of the open ocean. The estimates are based on data from the MARine Ecosystem DATa (MAREDAT) initiative, and cover five phytoplankton functional types: coccolithophores (40 species), diatoms (87 species), diazotrophs (two genera), Phaeocystis (two species) and picophytoplankton (two genera). Considered as major niche dimensions were temperature (°C), mixed layer depth (MLD; m), nitrate concentration (µmoles/L), mean photosynthetically active radiation in the mixed layer (MLPAR; µmoles/m**2/s), salinity, and the excess of phosphate versus nitrate relative to the Redfield ratio (P*; µmoles/L). For each niche dimension at a time, conditions at presence locations of the taxa were contrasted with conditions in 12 000 randomly sampled points from the open ocean using MaxEnt models. We used the quartiles of the response curves of these models to parameterize realized niche centers and niche breadths: the median (q50) of the response curves was considered to be the niche center and the distance between the lower quartile (q25) and the upper quartile (q75) was used as a rough estimate of niche breadth. We only reported meaningful niche estimates, i.e., estimates based on MaxEnt models that perform significantly better than random, as indicated by an area under the curve (AUC) score significantly larger than 0.5.
description: Supplement to: Brun, Philipp; Vogt, Meike; Payne, Mark R; Gruber, Nicolas; O'Brien, Colleen J; Buitenhuis, Erik Theodoor; Le Quéré, Corinne; Leblanc, Karine; Luo, Ya-Wei (2015): Ecological niches of open ocean phytoplankton taxa. Limnology and Oceanography, 60(3), 1020-1038
DOI: 10.1594/pangaea.854745
title: Carpolithes phoenixnordensis - MMG 10533b (mp4-Video 94563 kb)

description: Video of digital x-ray tomograms in longitudinal section through fossil seed of Carpolithes phoenixnordensis sp. nov. S.Y. SM., M.E. COLLINSON, & BENEDICT (prev. identified as Alpinia) from the upper Eocene of Germany, MMG 10533b.
DOI: 10.1594/pangaea.860074
title: Fly-through movie for the reconstructed folds in the onset region of the Petermann Glacier, North Greenland

description: The increasing catalogue of high-quality ice-penetrating radar data provides a unique insight in the internal layering architecture of the Greenland ice sheet. The stratigraphy, an indicator of past deformation, highlights irregularities in ice flow and reveals large perturbations without obvious links to bedrock shape. In this work, to establish a new conceptual model for the formation process, we analysed the radar data at the onset of the Petermann Glacier, North Greenland, and created a three-dimensional model of several distinct stratigraphic layers. We demonstrate that the dominant structures are cylindrical folds sub-parallel to the ice flow. By numerical modelling, we show that these folds can be formed by lateral compression of mechanically anisotropic ice, while a general viscosity contrast between layers would not lead to folding for the same boundary conditions. We conclude that the folds primarily form by converging flow as the mechanically anisotropic ice is channelled towards the glacier.
description: Supplement to: Bons, Paul D; Jansen, Daniela; Mundel, Felicitas; Bauer, Catherine C; Binder, Tobias; Eisen, Olaf; Jessell, Mark W; Llorens, Maria-Gema; Steinbach, Florian; Steinhage, Daniel; Weikusat, Ilka (2016): Converging flow and anisotropy cause large-scale folding in Greenland's ice sheet. Nature Communications, 7, 11427
DOI: 10.1594/pangaea.854748
title: Carpolithes phoenixnordensis - MMG 10533c (mp4-Video 91099 kb)

description: Video of digital x-ray tomograms in transverse section through fossil seed of Carpolithes phoenixnordensis sp. nov. S.Y. SM., M.E. COLLINSON, & BENEDICT (prev. identified as Alpinia) from the upper Eocene of Germany, MMG 10533bc
DOI: 10.1594/pangaea.888410
title: Early biofouling processes in a coastal lagoon of Tahiti, French Polynesia (complete set)
DOI: 10.1594/pangaea.806671
title: (Table 2) Geochemistry of volcanic glass at DSDP Leg 81 holes Paleocene-Eocene pyroclastic deposits
DOI: 10.1594/pangaea.846879
title: Land cover layer, digitized from the PEF Survey of Western Palestine (1880)

description: Geographic information systems allow the extraction and quantitative analysis of information from historical maps. The aims of this research were to examine the completeness of information represented on the 1881 Palestine Exploration Fund (PEF) map, to quantitatively reconstruct the landscape of nineteenth century Palestine and to explore whether spatial patterns in land cover/land use can be partially explained statistically by physical and human factors. Using historical aerial photos, we concluded that most of the major past landscape features were indeed shown on the PEF map, with an average overall correspondence of 53%. Forests and Mediterranean maquis were more abundant at distances greater than 2 km from towns and villages. Specific land cover/land-use types were associated with certain soil types, topographic regions and rainfall thresholds. In conclusion, the 1881 PEF map can serve as a reliable reference for understanding the land cover/land-use patterns of nineteenth century Palestine.
description: Supplement to: Schaffer, Gad; Levin, Noam (2015): Reconstructing nineteenth century landscapes from historical maps—the Survey of Western Palestine as a case study. Landscape Research, 1-20
DOI: 10.1594/pangaea.854754
title: Carpolithes bivascularis - MfN.MB.Pb.1993/3135-C (Filmclip 65042 kb)

description: Video of digital x-ray tomograms in longitudinal section through fossil specimen of Carpolithes bivascularis comb. nov. (MAI) S.Y. SM., M.E. COLLINSON, & BENEDICT (prev. identified as Alpinia) from the lower Miocene of Germany, MfN.MB.Pb.1993/3135-C.
DOI: 10.1594/pangaea.856061
title: (Table T1) Scanning electron microscope (SEM) analyses of IODP Site 321-U1338

description: The late Miocene to early Pliocene carbonate-rich sediments recovered at Integrated Ocean Drilling Program (IODP) Site U1338 during the Expedition 320/321 Pacific Equatorial Age Transect (PEAT) program contain abundant calcareous nanno- and microfossils. Geochemical proxies from benthic and planktonic foraminiferal and coccolithophore calcite could be very useful at this location; however, good preservation of the calcite is crucial for the proxies to be robust. Here, we evaluate the preservation of specific benthic and planktonic foraminifer species and coccolithophores in fine fraction sediment at Site U1338 using backscattered electron (topography mode) scanning electron microscopy (BSE-TOPO SEM). Both investigated foraminiferal species, Cibicidoides mundulus and Globigerinoides sacculifer, have undergone some alteration. The C. mundulus show minor evidence for dissolution, and only some specimens show evidence of overgrowth. The Gs. sacculifer show definite signs of alteration and exhibit variable preservation, ranging from fair to poor; some specimens show minor overgrowth and internal recrystallization but retain original features such as pores, spine pits, and internal test-wall growth structure, whereas in other specimens the recrystallization and overgrowth disguise many of the original features. Secondary electron and BSE-TOPO SEM images show that coccolith calcite preservation is moderate or moderate to poor. Slight to moderate etching has removed central heterococcolith features, and a small amount of secondary overgrowth is also visible. Energy dispersive spectroscopy analyses indicate that the main sedimentary components of the fine fraction sediment are biogenic CaCO3 and SiO2, with some marine barite. Based on the investigations in this data report, geochemical analyses on benthic foraminifers are unlikely to be affected by preservation, although geochemical analyses on the planktonic foraminifers should be treated cautiously because of the fair to poor and highly variable preservation.
description: * = from Wilkens et al., 2013, ** = from Wade et al., 2011.
description: Supplement to: Drury, Anna Joy; Lee, Geoffrey P; Pennock, Gillian M; John, Cédric M (2014): Data report: late Miocene to early Pliocene coccolithophore and foraminiferal preservation at Site U1338 from scanning electron microscopy. In: Proceedings of the IODP, Integrated Ocean Drilling Program
DOI: 10.1594/pangaea.854764
title: Friesengeist - Studentisches Medienprojekt zur Internationalen REKLIM Konferenz in Kooperation mit der DEKRA-Hochschule Berlin, Links zum Dokumentarfilm in unterschiedlichen Auflösungen

description: Die Menschen in Nordfriesland wissen, dass die Küste – und damit ihre Heimat – kein stabiler Zustand ist, sondern sich ständig verändert. In der Vergangenheit haben mehrfach Sturmfluten das Gesicht der Küste katastrophal verändert. Umso emotionaler ist die Beziehung der Nordfriesen zu ihrer Heimat. Doch auf der Insel Pellworm ist man sich sicher: "Wenn alles weiter seinen jetzigen Gang geht, wird es die Insel in 200 Jahren nicht mehr geben."
description: Film in Deutsch, 12:40 min., Buch & Regie: Karim Oeltze von Lobenthal und Tom Kroh, mit: Knud Knudsen, Deutschland 2014, http://reklim-medienprojekt.de
DOI: 10.1594/pangaea.747254
title: Meteorological observations during AJAX cruise from Soerabaja to Ambon started at 1834-05-21
DOI: 10.1594/pangaea.846881
title: Land cover of the Galilee region, digitized from the PEF Survey of Western Palestine (1880)

description: The Galilee is a region with significant natural and topographical value, including several large protected areas, one of which is Mount Meron (1,208 meters high). The Palestine Exploration Fund Survey of Western Palestine (PEF) was made in 1871-1877 by surveyors from the British Royal Engineer Corps appointed by the Palestine Exploration Fund, a British research society (Conder and Kitchener 1871-1877, Conder et al. 1881). Although we do not know how long it took the PEF surveyors to investigate the study area - Galilee (Israel), we do know that most of the study area was surveyed in 1877, with certain areas in the southern part of the study area surveyed in 1875 (Conder and Kitchener 1871-1877). The scale of the PEF map is 1:63,360 and it shows various landscape features, and uses shading to depict the topography. This map was scanned by the National Library of Israel (Map JB 900A [4] I 1918) at a resolution of 300 dpi. The entire PEF map was already digitized in a previous work (Schaffer & Levin, In press). Nonetheless, for this research proposes we had to generalize some of the classes (reducing the total classes from 18 to 9) so that the land classes on both maps, the PEF and Levés en Galilée will match. For example, three separate classes found on the complete PEF digitized map: 'scrub' 'scattered wood' and 'dense wood' were merged into one class 'Mediterranean natural vegetation' in this layer. Land cover features were digitized as polygons from the PEF map at a screen scale of 1:15,000. Where available, the names of drawn built-up areas were added to its attribute table. We also estimated the 'level of certainty' in which we identified the land cover class of each of the digitized polygons (Grossinger et al. 2007): a definite identification of the class of a feature was marked as 1, a partial identification was marked as 2 and an uncertain identification was marked as 3.