cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.900131
title: Shipborne global navigation satellite system (GNSS) retrieved precipitable water vapor in Fram Strait in 2016

description: The Multi-GNSS observations from an onboard receiver were retrieved using kinematic Precise Point Positioning (PPP) method. The solution using only Global Positioning System (GPS) observations is the GPS-only solution; and the one using GPS, GLONASS, and Galileo observations together, is the GRE PPP solution. R is short for the Russian system GLONASS, and E is short for Europe system Galileo.The GNSS data was collected by a GNSS receiver on R/V Lance. It is used by the Norwegian Polar Institute (NPI) for regular monitoring and research related to ocean and sea ice properties in Fram Strait. During the Fram Strait 2016 cruise from day-of-year (DOY) 238 to DOY 257, a geodetic JAVAD TR_G3TH GNSS receiver was installed on the ship bow, which is about 6 m above the water surface. This receiver collected multi-GNSS data at a sampling of 1-Hz, including GPS, GLONASS, and Galileo.
description: Supplement to: Wang, Jungang; Wu, Zhilu; Semmling, Maximilian; Zus, Florian; Gerland, Sebastian; Ramatschi, Markus; Ge, Maorong; Wickert, Jens; Schuh, Harald (2019): Retrieving Precipitable Water Vapor From Shipborne Multi-GNSS Observations. Geophysical Research Letters, 46(9), 5000-5008
DOI: 10.1594/pangaea.837677
title: Effect of increasing sea water pCO2 on the northern Atlantic krill species Nyctiphanes couchii

description: Surprisingly little is known about potential effects of ocean acidification on krill of the Northern Hemisphere as ecologically very important food web component. Sub-adult individuals of the northern Atlantic krill species Nyctiphanes couchii (caught at Austevoll near Bergen, Norway, in January 2013) were exposed in the laboratory to four different levels of pCO2 (430, 800, 1,100, and 1,700 µatm) for 5 weeks in order to assess potential changes in a set of biological response variables. Survival decreased and the frequency of moulting-related deaths increased with increasing pCO2. Survival was considerably reduced at relatively high pCO2 of 1,700 µatm and tended to be negatively affected at 1,100 µatm pCO2. However, the experimental results show no significant effects of pCO2 on inter-moult period and growth at pCO2 levels below 1,100 µatm. No differences in length measurements of the carapace and uropod were observed across pCO2 levels, indicating no effect of changing carbonate chemistry on the morphology of those calciferous parts of the exoskeleton. The results suggest that sub-adult N. couchii may not suffer dramatically from predicted near-future changes in pCO2. However, potential detrimental effects on the moulting process and associated higher mortality at 1,100 µatm pCO2 cannot be excluded. Further experiments are needed in order to investigate whether early life stages of N. couchii show a different sensitivity to elevated sea water pCO2 and whether those results are transferable to other krill species of the Northern Hemisphere.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Lavigne et al, 2014) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation is 2014-10-30.
description: Supplement to: Sperfeld, Erik; Mangor-Jensen, Anders; Dalpadado, Padmini (2014): Effect of increasing sea water pCO2 on the northern Atlantic krill species Nyctiphanes couchii. Marine Biology, 161(10), 2359-2370
DOI: 10.1594/pangaea.848270
title: Age model and sedimentation rates of sediment core PS75/072-4
DOI: 10.1594/pangaea.891434
title: Diatom-bound nitrogen isotope records in sediment core MD12-3396Cq
DOI: 10.1594/pangaea.900270
title: Elemental, biomarker, and macrofossil data for composite core Co1211

description: In this study, we use a combined biomarker and macrofossil approach to reconstruct the Holocene climate history recorded in Trifna Sø, Skallingen area, eastern North Greenland. Chronological information is derived from comparison of lithological, biogeochemical and macrofossil characteristics with a well‐dated record from nearby Lille Sneha Sø. Following local deglaciation around c. 8 cal. ka BP, the local peak warmth occurred between c. 7.4 and 6.2 cal. ka BP as indicated by maximum macrofossil abundances of warmth‐demanding plants (Salix arctica and Dryas integrifolia) and invertebrates (Daphnia pulex and Chironomidae). Warm conditions were dominated by terrestrial organic matter (OM) sedimentation as implied by the alkane‐based Paq ratio, but increased aquatic productivity is indicated when temperature was highest around 6.5 cal. ka BP. The n‐C29/n‐C31 alkane ratio shows that vegetation in the catchment was dominated by shrubs after deglaciation, but shifted towards relatively more grassy/herbaceous vegetation during peak warmth. After 5.4 cal. ka BP, the disappearance of warmth‐demanding plant and invertebrate macrofossils indicates cooling in the Skallingen area. This cooling was characterized by a significant shift towards dominance of aquatic OM sedimentation in Trifna Sø as implied by high Paq ratios. Cooling was also associated with a shift in vegetation type from dwarf‐shrub heaths towards relatively more herbaceous vegetation in the catchment, stronger erosion and more oligotrophic conditions in the lake. Our data show that mean air temperatures inferred using branched glycerol dialkyl glycerol tetraethers (brGDGTs) do not seem to accurately reflect the local climatic history. Irrespective of calibration, methylation of branched tetraethers (MBT) palaeothermometry cannot be reconciled with the macrofossil evidence and seems to be biased by either changing brGDGT sources (in situ vs. soil‐derived) or changing species assemblages and/or an unknown physiological response to changing environmental conditions at high latitude.
description: Supplement to: Kusch, Stephanie; Bennike, Ole; Wagner, Bernd; Lenz, Matthias; Steffen, Ilona; Rethemeyer, Janet (2019): Holocene environmental history in high-Arctic North Greenland revealed by a combined biomarker and macrofossil approach. Boreas, 48(2), 273-286
DOI: 10.1594/pangaea.900448
title: Indices derived from archaeal glycerol dialkyl glycerol tetraether lipids and tetraether-derived sea surface temperature estimates in sediment core MD99-2348 and borehole PRGL1-4

description: Metadata (core/borehole, section, and sample name) and original data (depth, age, and tetraether-based data) generated by Davtian et al. (2019). The age model is based on Sierro et al. (2009) and Frigola et al. (2012). The 1σ analytical uncertainties are 0.009 for RI-OH (Ring Index of hydroxylated tetraethers), 0.003 for TEX86 (TetraEther indeX of tetraethers consisting of 86 carbon atoms), BIT (Branched and Isoprenoid Tetraether index), and MI (Methane Index), and 0.019 for RI (Ring Index). These correspond to ranges of 0.5 and 0.2 °C in RI-OH-temperatures and TEX86-temperatures, respectively. The calibration used for RI-OH-based sea surface temperature (SST) reconstructions is SST = (RI-OH - 1.11)/0.018 (Lü et al., 2015).
description: Supplement to: Davtian, Nina; Ménot, Guillemette; Fagault, Yoann; Bard, Edouard (2019): Western Mediterranean Sea Paleothermometry Over the Last Glacial Cycle Based on the Novel RI-OH Index. Paleoceanography and Paleoclimatology, 34(4), 616-634
DOI: 10.1594/pangaea.900871
title: Hydrogen isotope ratios of alkenones from ODP Site 202-1234

description: Hydrogen isotope ratios of long-chain alkenones (δ2HC37 ratios) have been shown to correlate with salinity in several culture studies. However, it is uncertain how applicable the δ2HC37-salinity relationship is to reconstruct past salinity. δ2HC37 ratios were measured on sediments from a drill core (ODP site 1234) at the Chilean Margin covering the last ~150 kyr. High δ2HC37 values correspond to glacial time periods and interglacial periods are characterized by lower δ2HC37 values, aligning with δ18O ratios measured on planktonic foraminifera from the same core. Effects of parameters such as species composition, the δ2H-δ18O relationship used for ice volume corrections, and nutrient or light controlled growth rate, do not appear to significantly alter δ2HC37 ratios at ODP 1234. We use linear regression equations from batch culture experiments, marine surface sediments, and suspended particulate organic matter to quantitatively characterize salinity changes over the last ~150 kyr at ODP 1234. However, most of these equations yield larger salinity shifts than previously suggested, a phenomenon also observed for other δ2HC37 records. This suggests that the paleosensitivity of δ2HC37 ratios to salinity is larger in the geologic record than has been observed in any modern environment or laboratory settings, or that glacial to interglacial salinity shifts might be larger than currently believed.
description: Supplement to: Weiss, Gabriella M; de Bar, Marijke W; Stolwjik, D J; Schouten, Stefan; Sinninghe Damsté, Jaap S; van der Meer, Marcel T J (2019): Paleosensitivity of Hydrogen Isotope Ratios of Long-Chain Alkenones to Salinity Changes at the Chile Margin. Paleoceanography and Paleoclimatology, 34(6), 978-989
DOI: 10.1594/pangaea.910385
title: Plio-Pleistocene age-depth model of ODP Hole 122-762B

description: The advent of rapid-acquired proxy records provides paleoceanographers and paleoclimatologists with a wealth of high-resolution data. These data are a boon for the community, as they enable millennial- or even sub-millennial scale interpretation of past climate and ocean change. Multi-site and multi-proxy research permits regional and global correlations with high precision. Yet, accuracy is sometimes lost sight of, resulting in inaccurate age constraints. To highlight the importance of chronostratigraphic accuracy we examine a recent publication by J.-B. Stuut and co-authors (2019) that presents a chronostratigraphic framework potentially at odds with regional chronostratigraphy by up to 300 kyr in the Pliocene and 600 kyr in the Pleistocene. Using all available chronostratigraphic data, we provide an alternate integrated stratigraphic framework that results in a higher degree of uniformity among regional climate archives and confirms the timing of a major climatic transition in Australia between ~3.55 to 3.3 Ma.
description: Supplement to: Auer, Gerald; De Vleeschouwer, David; Christensen, Beth A (2020): Toward a Robust Plio-Pleistocene Chronostratigraphy for ODP Site 762. Geophysical Research Letters, 47(3), e2019GL085198
DOI: 10.1594/pangaea.832467
title: Sediment core-top GDGT data from the Arctic, the North Pacific and the Southern Ocean

description: TEX86 (TetraEther indeX of tetraethers consisting of 86 carbon atoms) is a sea surface temperature (SST) proxy based on the distribution of archaeal isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs). In this study, we appraise the applicability of TEX86 and TEX86L in subpolar and polar regions using surface sediments. We present TEX86 and TEX86L data from 160 surface sediment samples collected in the Arctic, the Southern Ocean and the North Pacific. Most of the SST estimates derived from both TEX86 and TEX86L are anomalously high in the Arctic, especially in the vicinity of Siberian river mouths and the sea ice margin, plausibly due to additional archaeal contributions linked to terrigenous input. We found unusual GDGT distributions at five sites in the North Pacific. High GDGT-0/crenarchaeol and GDGT-2/crenarchaeol ratios at these sites suggest a substantial contribution of methanogenic and/or methanotrophic archaea to the sedimentary GDGT pool here. Apart from these anomalous findings, TEX86 and TEX86L values in the surface sediments from the Southern Ocean and the North Pacific do usually vary with overlaying SSTs. In these regions, the sedimentary TEX86-SST relationship is similar to the global calibration, and the derived temperature estimates agree well with overlaying annual mean SSTs at the sites. However, there is a systematic offset between the regional TEX86L-SST relationships and the global calibration. At these sites, temperature estimates based on the global TEX86L calibration are closer to summer SSTs than annual mean SSTs. This finding suggests that in these subpolar settings a regional TEX86L calibration may be a more suitable equation for temperature reconstruction than the global calibration.
description: Supplement to: Ho, Sze Ling; Mollenhauer, Gesine; Fietz, Susanne; Martínez-García, Alfredo; Lamy, Frank; Rueda, Gemma; Schipper, Konstanze; Méheust, Marie; Rosell-Melé, Antoni; Stein, Ruediger; Tiedemann, Ralf (2014): Appraisal of TEX86 and TEX(L)86 thermometries in subpolar and polar regions. Geochimica et Cosmochimica Acta, 131, 213-226
DOI: 10.1594/pangaea.882549
title: Stable isotope record of Cibicidoides wuellerstorfi of ODP Hole 165-999A
DOI: 10.1594/pangaea.882547
title: Late Pleistocene isotopes analysis from ODP Site 165-999
DOI: 10.1594/pangaea.890145
title: Seawater carbonate chemistry and life history traits and feeding of the littoral mysid Praunus flexuosus

description: Mysids, an important food web component in the littoral zone of coastal waters, have been neglected so far in ocean acidification research. Juveniles of the littoral mysid Praunus flexuosus were exposed in the laboratory to four pCO2 levels (530, 930, 1200, and 1600 µatm) for 5 weeks. In addition, juveniles were provided with two different food levels during the experiment. High pCO2 did not affect survival, but delayed moulting. Juvenile growth decreased and inter-moult period between the last moulting events increased with increasing pCO2 at low but not at high food supply, suggesting that high food availability is needed to prevent these negative effects of elevated pCO2. However, small individual juveniles showed lower feeding rates at high pCO2 compared to the control after prolonged exposure, suggesting decreased activity likely due to impaired metabolism. The subtle negative effects of elevated pCO2 on life history traits observed in this study suggest that P. flexuosus probably has to adapt to counteract adverse effects of predicted high pCO2, especially when food is limiting.
description: In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2016) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2018-05-23.
description: Supplement to: Sperfeld, Erik; Mangor-Jensen, Anders; Dalpadado, Padmini (2017): Effects of increasing pCO2 on life history traits and feeding of the littoral mysid Praunus flexuosus. Marine Biology, 164(8)
DOI: 10.1594/pangaea.826596
title: (Fig. 3) Lithogenic mass accumulation rate of sediment core PS75/076-2

description: Alignment of Fe content records to EDC dust contents on AICC12 time-scale; see Lamy et al., 2014 SOM.
DOI: 10.1594/pangaea.848268
title: Opal flux of sediment core PS75/072-4
DOI: 10.1594/pangaea.904402
title: Results of the analysis of flow modelleing above a bedform field

description: The first dataset "results morpho" presents all the results of the morphological analysis of the bed topography, presented in Figure 6 and Table 3 of the published paper.The second dataset "results hydro" presents all the results of the hydrological analysis of the model results, presented in Figure 9 of the published paper.
description: Supplement to: Lefebvre, Alice (2019): Three-dimensionalflow above river bedforms: Insightsfrom numerical modeling of a naturaldunefield (Río Paraná, Argentina). Journal of Geophysical Research-Earth Surface, 124(8), 2241-2264
DOI: 10.1594/pangaea.826591
title: (Fig. 2) Iron content of sediment core PS75/059-2

description: Alignment of Fe content records to EDC dust contents on AICC12 time-scale; see Lamy et al., 2014 SOM.
DOI: 10.1594/pangaea.908220
title: Genome-wide raw data on local adaptation in a mediterranean lizard

description: Raw genomic data for 5 locally adapted populations of a mediterranean lizard. We used the restriction enzyme Pst1 for GBS library preparation. Sequencing was done in an Illumina HiSeq2500 sequencer. The pipeline used for SNPs discovery was UNEAK, implemented in TASSEL v.3.0. After quality and linkage disiquilibrium filtering steps, we obtained a dataset with &gt; 73,000 SNPs. We also provide data on phenotypic variation.
description: Supplement to: Llanos-Garrido, Alejandro; Pérez-Tris, Javier; Díaz, José A (2019): The combined use of raw and phylogenetically independent methods of outlier detection uncovers genome-wide dynamics of local adaptation in a lizard. Ecology and Evolution, 9(24), 14356-14367
DOI: 10.1594/pangaea.902182
title: Hydrographic data, current velocity data, turbulent kinetic energy dissipation rates, satellite data, and nitrate concentrations derived from measured density and nitrate, in the Kuroshio near the Hyuganada Sea in November 2018

description: This dataset include microstructure data of turbulent kinetic energy dissipation rates measured using a tow-yo microstructure profiler, Underway-VMP (UVMP), hydrographic data measured using a tow-yo Rinko CTD profiler (URINKO) and by the UVMP, shipboard ADCP data and nitrate concentrations derived using a relation between in-situ nitrate measurements and density of seawater measured using deep-SUNA, water sampling, UVMP and URINKO. These data were obtained in the single observation campaign in the Kuroshio Current flowing near the Hyuganada Sea, off southeast of Kyushu Japan. In addition, topographic data, ETOPO1 and satellite sea surface height data on the observation date, November 25, 2019 are provided.
description: Supplement to: Nagai, Takeyoshi; Duran, Gloria Silvana; Otero, Andre Diego; Mori, Yasutaka; Yoshie, Naoki; Ohgi, Kazuki; Hasegawa, Daisuke; Nishina, Ayako; Kobari, Toru (2019): How the Kuroshio Current delivers nutrients to sunlit layers on the continental shelves with aid of near-inertial waves and turbulence. Geophysical Research Letters
DOI: 10.1594/pangaea.902690
title: Groundwater flow under a palaeo-ice stream

description: This dataset contains files for hydrogeological simulations and borehole data from the Polish and German part of the Odra Lobe, NE Germany.
description: Files in the zip archives were obtained and from the archives of the Polish Geological Institute (Poland); Landesamt für Bergbau, Geologie und Rohstoffe (LBGR) Brandenburg (Germany) and Landesamt für Umwelt, Naturschutz und Geologie Mecklenburg-Vorpommern (Germany).
description: Supplement to: Hermanowski, Piotr; Piotrowski, Jan A (2019): Groundwater flow under a palaeo-ice stream of the Scandinavian ice sheet and its implications for the formation of Stargard drumlin field, NW Poland. Journal of Geophysical Research-Earth Surface
DOI: 10.1594/pangaea.909434
title: CloudSat-inferred vertical structure of precipitation over the Antarctic continent

description: Current global warming is causing significant changes in snowfall in polar regions, directly impacting the mass balance of the ice caps. The only water supply in Antarctica, precipitation, is poorly estimated from surface measurements. The onboard cloud-profiling radar of the CloudSat satellite provided the first real opportunity to estimate precipitation at continental scale. Based on CloudSat observations, we propose to explore the vertical structure of precipitation in Antarctica over the 2007-2010 period. A first division of this dataset following a topographical approach (continent versus peripheral regions, with a 2250m topographical criterion) shows a high precipitation rate (275mm/yr at 1200meters above ground level) with low relative seasonal variation (+/-11%) over the peripheral areas. Over the plateau, the precipitation rate is low (34mm/yr at 1200m.a.g.l.) with a much larger relative seasonal variation (+/-143%). A second study that follows a geographical division highlights the average vertical structure of precipitation and temperature depending on the regions and their interactions with topography. In particular, over ice-shelves, we see a strong dependence of the distribution of precipitation on the sea-ice coverage. Finally, the relationship between precipitation and temperature is analyzed and compared with a simple analytical relationship. This study highlights that precipitation is largely dependent on the advection of air masses along the topographic slopes with an average vertical wind of 0.02m/s. This provides new diagnostics to evaluate climate models with a three-dimensional approach of the atmospheric structure of precipitation.
description: Supplement to: Lemonnier, Florentin; Madeleine, Jean-Baptiste; Claud, Chantal; Palerme, Cyril; Genthon, Christophe; L'Ecuyer, Tristan; Wood, Norman B (2020): CloudSat-Inferred Vertical Structure of Snowfall Over the Antarctic Continent. Journal of Geophysical Research: Atmospheres, 125(2), e2019JD031399
DOI: 10.1594/pangaea.905108
title: Observed and modeled diazotroph nifH abundances in the global ocean

description: We supplemented the dataset presented in Luo et al. (2012) "Database of diazotrophs in global ocean: abundance, biomass and nitrogen fixation rates" with measurements of nifH genes using qPCR from 17 additional publications. This addition represents a 141% and a 118% increase in the number of depth-integrated and volumetric data points compared to the database of Luo et al. (2012). This new database includes 223 (1428), 253 (1575), 226 (1424) and 144 (958) observations of depth-integrated (volumetric) abundances of Trichodesmium, UCYN-A, UCYN-B and Richelia, respectively. Based on the updated dataset, we applied a machine learning algorithm-random forest to estimate the nifH abundances of Trichodesmium, UCYN-A, UCYN-B and Richelia in the global ocean. The updated dataset of observed diazotroph nifH abundances, machine learning algorithms, codes and the modeled diazotroph nifH abundances in the global ocean are deposited here.1. Diazotroph nifH abundances in the global ocean: observed diazotroph nifH abundances compiled from the literature2. Diazotrophs_RF_models: random forest models built in MATLAB to estimate diazotroph abundances in the global ocean including "model_Tricho_tree", "model_UCYNA_tree", "model_UCYNB_tree", and "model_Richelia_tree"3. Diazotrophs_RF_global_monthly: monthly average diazotroph abundances (nifH gene copies m-2) in the global ocean estimated by random forest models 4. diazotroph_abundances_prediction: MATLAB script file to predict diazotroph abundances using random forest models ("Diazotrophs_RF_models"), predictors ("predicotors_diazotrophs") and basin separation file ("basin_separation")5. predictors_diazotrophs: predictors at monthly scale [1.lat; 2.lon; 3.month; 4.solar-flux; 5.wind; 6.sst; 7.sss; 8.log10(nitrate); 9.log10(phosphate); 10.log10(p*); 11.oxygen; 12.par; 13.mld; 14.par_mld; 15.log10(chl_a)); 16.iron]6. basin_separation: a file used to denote and separate different ocean basins and land
description: Supplement to: Tang, Weiyi; Cassar, Nicolas (2019): Data-Driven Modeling of the Distribution of Diazotrophs in the Global Ocean. Geophysical Research Letters, 46(21), 12258-12269