cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.706020
title: Documentation of sediment core GIK15664-3
DOI: 10.1594/pangaea.847623
title: Database on the molluscan fauna from the Mediterranean Reef Ecosystems (CorMolDB - Part I)

description: In the Mediterranean Sea, infralittoral and circalittoral rocky bottoms (from 15 to 120 m) are characterized by a biogenic habitat, named "coralligenous", formed by the concretion of calcareous organisms, mainly algal thalli, and- to a lesser extent- by animal skeletons. This complex habitat is inhabited by a rich fauna that belongs to different taxonomic groups. Sponges, bryozoans, cnidarians and ascidians are the most common sessile organisms that inhabit the area while crustacean and molluscs are the common mobile organisms. Little information on the diversity of the molluscs that thrive in the coralligenous habitat is known while this information is highly important for biodiversity management purposes. After thoroughly studying the available and accessible published literature, a database for the molluscs of the coralligenous habitat has been designed and implemented for the collection and management of this information. From its index compilation more than 511 species of molluscs have been recorded so far from the coralligenous formations, the majority of which belongs to the class Gastropoda (357 sp.) followed by the Bivalvia (137 sp.), Polyplacophora (14 sp.), Cephalopoda (2 sp.) and Scaphopoda (1 sp.). Among these, the gastropod Luria lurida (Linnaeus, 1758) and Charonia lampas (Linnaeus, 1758), the endemic bivalve Pinna nobilis Linnaeus, 1758 and the endolithic bivalve Lithophaga lithophaga (Linnaeus, 1758), are protected by international conventions.
description: Supplement to: Poursanidis, Dimitris; Koutsoubas, Drosos (2015): A computerized database (CorMol) on the molluscan fauna from the Mediterranean reef ecosystems: Part I, the coralligenous formations. Quaternary International, 390, 29-43
DOI: 10.1594/pangaea.663828
title: Oceanography at CTD/bottle station IFREMER_0668
DOI: 10.1594/pangaea.849223
title: The SPARC Data Initiative CFC-11, CFC-12, HF and SF6 climatologies from international satellite limb sounders

description: A quality assessment of the CFC-11 (CCl3F), CFC-12 (CCl2F2), HF, and SF6 products from limb-viewing satellite instruments is provided by means of a detailed intercomparison. The climatologies in the form of monthly zonal mean time series are obtained from HALOE, MIPAS, ACE-FTS, and HIRDLS within the time period 1991-2010. The intercomparisons focus on the mean biases of the monthly and annual zonal mean fields and aim to identify their vertical, latitudinal and temporal structure. The CFC evaluations (based on MIPAS, ACE-FTS and HIRDLS) reveal that the uncertainty in our knowledge of the atmospheric CFC-11 and CFC-12 mean state, as given by satellite data sets, is smallest in the tropics and mid-latitudes at altitudes below 50 and 20 hPa, respectively, with a 1sigma multi-instrument spread of up to ±5 %. For HF, the situation is reversed. The two available data sets (HALOE and ACE-FTS) agree well above 100 hPa, with a spread in this region of ±5 to ±10 %, while at altitudes below 100 hPa the HF annual mean state is less well known, with a spread ±30 % and larger. The atmospheric SF6 annual mean states derived from two satellite data sets (MIPAS and ACE-FTS) show only very small differences with a spread of less than ±5 % and often below ±2.5 %. While the overall agreement among the climatological data sets is very good for large parts of the upper troposphere and lower stratosphere (CFCs, SF6) or middle stratosphere (HF), individual discrepancies have been identified. Pronounced deviations between the instrument climatologies exist for particular atmospheric regions which differ from gas to gas. Notable features are differently shaped isopleths in the subtropics, deviations in the vertical gradients in the lower stratosphere and in the meridional gradients in the upper troposphere, and inconsistencies in the seasonal cycle. Additionally, long-term drifts between the instruments have been identified for the CFC-11 and CFC-12 time series. The evaluations as a whole provide guidance on what data sets are the most reliable for applications such as studies of atmospheric transport and variability, model-measurement comparisons and detection of long-term trends.
description: Supplement to: Tegtmeier, Susann; Hegglin, Michaela I; Anderson, John; Funke, Bernd; Gille, John C; Jones, Ashley; Smith, Lesley; von Clarmann, Thomas; Walker, Kaley A (2016): The SPARC Data Initiative: comparisons of CFC-11, CFC-12, HF and SF<sub>6</sub> climatologies from international satellite limb sounders. Earth System Science Data, 8(1), 61-78
DOI: 10.1594/pangaea.758225
title: Antworten aus der Eiszeit (film, 29 min.)

description: film in mp4-format, 29 min, in German, telecasted © ZDF, Germany 1994
DOI: 10.1594/pangaea.847787
title: Corona Satellite Photo Mosaic: Northern Seward Peninsula (1962-06-28)

description: This raster dataset is a high-resolution mosaic of 4 Corona-KH4 satellite photos over the northern Seward Peninsula in Northwest Alaska dated to 28 July 1962. The mosaic covers a total area of about 26,000 km2 with about 2/3 of this being land area, including portions of the Bering Land Bridge National Preserve, the Cape Espenberg Lowland, the Baldwin Peninsula, and the settlements of Kotzebue and Shishmaref. The images of the Corona KH-4 camera system were ordered through the Earth Explorer web interface. The Corona images are part of a batch of US military satellite imagery declassified for civilian use in 1995 under an Executive Order by the US President. Each of the 4 images used in this dataset, originally film negatives, was scanned in 4 segments in high resolution (7 micron, 3600 dpi) by the USGS EROS data center. The processing, all conducted in ArcGIS 9.3, included georeferencing each individual image segment to a common base (three L1T terrain-corrected scenes of Landsat-5 TM and Landsat-7 ETM+). Between 22 and 53 Ground Control Points were identified between a segment and base image, achieving Root Mean Square Errors (RMSE) from 6.9m to 16.4m. The individual segments were then rectified with a 3rd polynomial order warping using bilinear pixel resampling. Histogram matching in overlapping image portions was used to smooth the transition between greyscale values between image strips. All segments were then mosaicked into one raster. The image mosaic was gridded to a 6m ground resolution and exported as a GeoTIFF (3.9 GB) raster image with a projection in UTM 3N, WGS-84.
DOI: 10.1594/pangaea.853654
title: Portuguese coastline between 1958-2010 in shapefile format

description: The dataset comprises in one zip-archive:1) PortugueseCoastline_1958.shp - polyline shapefile mapping the 1958 coastline;2) PortugueseCoastline_2010.shp - polyline shapefile mapping the 2010 coastline;3) Rate_of_Change_250m_1958_2010.shp - polyline shapefile representing the long-term change rates between 1958 and 2010, estimated at each 250 m. Rate of change vectors are represented with an exaggeration factor of 5. Rate of change shapefile table of content has the distance of each coastline to a referenced baseline (Date_20100601 and Date_19580101 columns); the distance calculated between both coastlines (Distance column) and rate of change respectively (ChangeRate column).4) Rate_of_Change_250m_1958_2010.lyr - a lyr file containing the symbology for the Rate_of_Change_250m_1958_2010.shp file.Data can be assessed with GIS software such ArcGIS or QGIS.Title describing content:1) Portuguese coastline of sand-dune systems for the year 19582) Portuguese coastline of sand-dune systems for the year 20103) Portuguese coastline rates of change between 1958 and 2010. (include both 3) and 4) on the zipped file)Shape files were created with ArcMap 10.
DOI: 10.1594/pangaea.855461
title: Direct visualization of solute locations in laboratory ice samples, links to videos

description: Many important chemical reactions occur in polar snow, where solutes may be present in several reservoirs, including at the air-ice interface and in liquid-like regions within the ice matrix. Some recent laboratory studies suggest chemical reaction rates may differ in these two reservoirs. While investigations have examined where solutes are found in natural snow and ice, similar research has not identified solute locations in laboratory samples, nor the possible factors controlling solute segregation. To address this, we examined solute locations in ice samples prepared from either aqueous cesium chloride (CsCl) or Rose Bengal solutions that were frozen using several different methods. Samples frozen in a laboratory freezer had the largest liquid-like inclusions and air bubbles, while samples frozen in a custom freeze chamber had somewhat smaller air bubbles and inclusions; in contrast, samples frozen in liquid nitrogen showed much smaller concentrated inclusions and air bubbles, only slightly larger than the resolution limit of our images (~2 µm). Freezing solutions in plastic versus glass vials had significant impacts on the sample structure, perhaps because the poor heat conductivity of plastic vials changes how heat is removed from the sample as it cools. Similarly, the choice of solute had a significant impact on sample structure, with Rose Bengal solutions yielding smaller inclusions and air bubbles compared to CsCl solutions frozen using the same method. Additional experiments using higher-resolution imaging of an ice sample show that CsCl moves in a thermal gradient, supporting the idea that the solutes in ice are present in liquid-like regions. Our work shows that the structure of laboratory ice samples, including the location of solutes, is sensitive to freezing method, sample container, and solute characteristics, requiring careful experimental design and interpretation of results.
description: Supplement to: Hullar, Theodore; Anastasio, Cort (2016): Direct visualization of solute locations in laboratory ice samples. The Cryosphere, 10(5), 2057-2068
DOI: 10.1594/pangaea.893333
title: Stable oxygen isotopes of sediment core GeoB2107-3
DOI: 10.15468/dl.dhkprg
title: Occurrence Download

description: A dataset containing 868 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is South America",
 "TaxonKey is Macromitrium punctatum (Hook. & Grev.) Brid."
 ]
}

 The dataset includes 868 records from 65 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0031276-240626123714530/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.849313
title: Northeast Greenland - Digital Bathymetric Compilation, with links to DBM in ArcGIS format

description: A new digital bathymetric model (DBM) for the Northeast Greenland (NEG) continental shelf (74°N - 81°N) is presented. The DBM has a grid cell size of 250 m × 250 m and incorporates bathymetric data from 30 multibeam cruises, more than 20 single-beam cruises and first reflector depths from industrial seismic lines. The new DBM substantially improves the bathymetry compared to older models. The DBM not only allows a better delineation of previously known seafloor morphology but, in addition, reveals the presence of previously unmapped morphological features including glacially derived troughs, fjords, grounding-zone wedges, and lateral moraines. These submarine landforms are used to infer the past extent and ice-flow dynamics of the Greenland Ice Sheet during the last full-glacial period of the Quaternary and subsequent ice retreat across the continental shelf. The DBM reveals cross-shelf bathymetric troughs that may enable the inflow of warm Atlantic water masses across the shelf, driving enhanced basal melting of the marine-terminating outlet glaciers draining the ice sheet to the coast in Northeast Greenland. Knolls, sinks, and hummocky seafloor on the middle shelf are also suggested to be related to salt diapirism. North-south-orientated elongate depressions are identified that probably relate to ice-marginal processes in combination with erosion caused by the East Greenland Current. A single guyot-like peak has been discovered and is interpreted to have been produced during a volcanic event approximately 55 Ma ago.
description: Supplement to: Arndt, Jan Erik; Jokat, Wilfried; Dorschel, Boris; Myklebust, Reidun; Dowdeswell, Julian A; Evans, Jeffrey (2015): A new bathymetry of the Northeast Greenland continental shelf: Constraints on glacial and other processes. Geochemistry, Geophysics, Geosystems, 16(10), 3733-3753
DOI: 10.1594/pangaea.848117
title: DATED-1: compilation of dates and time-slice reconstruction of the build-up and retreat of the last Eurasian (British-Irish, Scandinavian, Svalbard-Barents-Kara Seas) Ice Sheets 40-10 ka

description: DATED-1 comprises a compilation of dates related to the build-up and retreat of the Eurasian (British-Irish, Scandinavian, Svalbard-Barents-Kara Seas) Ice Sheets, and time-slice maps of the Eurasian Ice sheet margins. Dates are sourced from the published literature. Ice margins are based on published geological and chronological data and include uncertainty bounds (maximum, minimum) as well as what we consider to be the most-credible (mc) based on the available evidence. DATED-1 has a census date of 1 January 2013. Full description and caveats for use are given in: Hughes, A.L.C., Gyllencreutz, R., Lohne, Ø.S., Mangerud, J., Svendsen, J.I. (2015) The last Eurasian Ice Sheets - a chronological database and time-slice reconstruction, DATED-1.
DOI: 10.1594/pangaea.831631
title: Planktonic foraminifera in sediment trap OMEX2_trap
DOI: 10.1594/pangaea.701427
title: Global radiation during HEINCKE cruise HE181
DOI: 10.1594/pangaea.762394
title: (Table 1) Major-element content of ODP Site 124-767 sediments
DOI: 10.1594/pangaea.716901
title: (Appendix Table 2) Sr-Nd-Pb isotope ratios for basalts from the North Atlantic Igneous Province
DOI: 10.1594/pangaea.856722
title: Enhanced seasonal CO_2 exchange caused by amplified plant productivity in northern ecosystems, link to model results

description: Atmospheric monitoring of high northern latitudes (&gt; 40°N) has shown an enhanced seasonal cycle of carbon dioxide (CO2) since the 1960s but the underlying mechanisms are not yet fully understood. The much stronger increase in high latitudes compared to low ones suggests that northern ecosystems are experiencing large changes in vegetation and carbon cycle dynamics. Here we show that the latitudinal gradient of the increasing CO2 amplitude is mainly driven by positive trends in photosynthetic carbon uptake caused by recent climate change and mediated by changing vegetation cover in northern ecosystems. Our results emphasize the importance of climate-vegetation-carbon cycle feedbacks at high latitudes, and indicate that during the last decades photosynthetic carbon uptake has reacted much more strongly to warming than carbon release processes.
description: Model simulations of gross primary production, net biome productivity and the seasonal amplitude of atmospheric CO2 from the LPJmL dynamic global vegetation model coupled to the TM3 atmospheric transport model. Global gridded model outputs are in NetCDF. Site-level CO2 amplitude time series are in ASCII format.Creator and contact: Matthias Forkel, 2016-01-08, mailto:matthias.forkel@geo.tuwien.ac.at
description: Supplement to: Forkel, Matthias; Carvalhais, Nuno; Rödenbeck, Christian; Keeling, Ralph F; Heimann, Martin; Thonicke, Kirsten; Zaehle, Sönke; Reichstein, Markus (2016): Enhanced seasonal CO_2 exchange caused by amplified plant productivity in northern ecosystems. Science, 6274, 696-699
DOI: 10.1594/pangaea.859702
title: Continuous thermosalinograph oceanography along HEINCKE cruise track HE330
DOI: 10.1594/pangaea.846615
title: Snow melt monitoring at Scheteligfjellet, near Ny-Ålesund, Svalbard, in 2013, links to images

description: Located at approx. 550 m a.s.l. looking ESE on the Bayelva catchment, involving the Bayelva station, CCT and the village of Ny-Ålesund. Orthorectified images at 1m resolution of the camera scene (in UTM zone 35), ranging from the W side of the Bayelva (left), the Brøggerbreen moraines (bottom), Ny-Ålesund airport and village (top), and the road to Zeppelinfjellet (right). The absolute referencing accuracy is about 5 m in the W (left part) and 50 - 100 m in the E (right part). Buildings and elevated structures cause strong distortions and image errors. We provide both geopreferenced images in the geotiff-format (readable e.g. in ArcGIS) and unreferenced jpg images for easy overview.
DOI: 10.1594/pangaea.839163
title: Case studies of the effects of a total solar eclipse on weather with varying degrees of cloud cover using a local numerical weather prediction model

description: The importance of renewable energies for the European electricity market is growing rapidly. This presents transmission grids and the power market in general with new challenges which stem from the higher spatiotemporal variability of power generation. This uncertainty is due to the fact that renewable power production results from weather phenomena, thus making it difficult to plan and control.We present a sensitivity study of a total solar eclipse in central Europe in March. The weather in Germany and Europe was modeled using the German Weather Service's local area models COSMO-DE and COSMO-EU, respectively (http://www.cosmo-model.org/). The simulations were performed with and without considering a solar eclipse for the following 3 situations:1. An idealized, clear-sky situation for the entire model area (Europe, COSMO-EU)2. A real weather situation with mostly cloudy skies (Germany, COSMO-DE)3. A real weather situation with mostly clear skies (Germany, COSMO-DE)The data should help to evaluate the effects of a total solar eclipse on the weather in the planetary boundary layer. The results show that a total solar eclipse has significant effects particularly on the main variables for renewable energy production, such as solar irradiation and temperature near the ground.
description: The data is stored in the meteorological format GRIB. We recommend using the ECMWF's GRIB API (http://software.ecmwf.int/wiki/display/GRIB/) to view and process the data. It is divided into 3 parts:- {Europe_no_clouds} (situation 1)- {Germany_overcast} (situation 2)- {Germany_clear_sky} (situation 3)Each part contains 2 subfolders:{control} and {eclipse}, which each refer to either the control or the eclipse run of the simulated situation.Each subfolder contains the following files:- {analysis.grib} - The model run's initial conditions- {constants.grib} - The constants used- {forecast_DDHHMMSS.grib} - The forecast model fields, where {DDHHMMSS} is the timestamp referring to model lead time.
DOI: 10.1594/pangaea.856770
title: Larcform 1 - single column model intercomparison of Arctic air formation, link to model results in NetCDF format

description: Weather and climate models struggle to represent lower tropospheric temperature and moisture profiles and surface fluxes in Arctic winter, not least because they lack or misrepresent physical processes that are specific to high latitudes. The Arctic boundary layer in winter has been observed to be in either a radiatively clear or cloudy state: The radiatively clear state is characterized by strong surface radiative cooling leading to the build-up of surface-based temperature inversions, whereas the cloudy state occurs when cloud liquid water is present in the atmospheric column, allowing little or no surface radiative cooling and leading to weaker and typically elevated temperature inversions. Many large-scale models have been shown to lack the cloudy state, and some do substantially underestimate stability in the clear state. We here present results from the first Lagrangian ARCtic air FORMation experiment (Larcform 1), a GASS (Global atmospheric system studies) single-column model intercomparison which reproduces these biases of large-scale models in an idealised setup.
description: Supplement to: Pithan, Felix; Ackerman, Andrew; Angevine, Wayne; Hartung, Kerstin; Ickes, Luisa; Kelley, Maxwell; Medeiros, Brian P; Sandu, Irina; Steeneveld, Gert-Jan; Sterk, HAM; Svensson, Gunilla; Vaillancourt, Paul A; Zadra, Ayrton (2016): Strengths and biases of models in representing the Arctic winter boundary layer - the Larcform 1 single column model intercomparison. Journal of Advances in Modeling Earth Systems, 8(3), 1345-1357
DOI: 10.1594/pangaea.855640
title: Mapping the Antarctic Polar Front: Weekly realizations from 2002 to 2014, links to NetCDF file and MPEG4 movie

description: We map the weekly position of the Antarctic Polar Front (PF) in the Southern Ocean over a 12-year period (2002–2014) using satellite sea surface temperature (SST) estimated from cloud-penetrating microwave radiometers. Our study advances previous efforts to map the PF using hydrographic and satellite data and provides a unique realization of the PF at weekly resolution across all longitudes. The mean path of the PF is asymmetric; its latitudinal position spans from 44 to 64° S along its circumpolar path. SST at the PF ranges from 0.6 to 6.9 °C, reflecting the large spread in latitudinal position. The average intensity of the front is 1.7 °C per 100 km, with intensity ranging from 1.4 to 2.3 °C per 100 km. Front intensity is significantly correlated with the depth of bottom topography, suggesting that the front intensifies over shallow bathymetry. Realizations of the PF are consistent with the corresponding surface expressions of the PF estimated using expendable bathythermograph data in the Drake Passage and Australian and African sectors. The climatological mean position of the PF is similar, though not identical, to previously published estimates. As the PF is a key indicator of physical circulation, surface nutrient concentration, and biogeography in the Southern Ocean, future studies of physical and biogeochemical oceanography in this region will benefit from the provided data set.
description: Processing version 2015.1.1 indicates solely that additional metadata (e.g., \'time_stamp\') has been added to version 2015.1 for enhanced user-friendliness; the original data from version 2015.1 has NOT been modified.
description: Supplement to: Freeman, Natalie M; Lovenduski, Nicole S (2016): Mapping the Antarctic Polar Front: weekly realizations from 2002 to 2014. Earth System Science Data, 8(1), 191-198
DOI: 10.1594/pangaea.696203
title: Organic carbon and nitrogen concentrations in waters of the Arabian Sea at Station M32/3_240