cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.899433
title: Thermal and visible videos from lava lakes around the world

description: Active lava lakes represent a variety of open-vent volcanism in which a sizable body of lava accumulates at the top of the magma column, constrained by the vent and/or crater geometry. The longevity of lava lakes reflects a balancing of cooling and outgassing occurring at the surface and input of hot and gas-rich magma from below. Due to their longevity and relative accessibility, lava lakes provide a natural laboratory for studying fundamental volcanic processes such as degassing, convection and cooling. This article examines all seven lakes that existed at the time of writing in 2018, located in the Pacific, Antarctica, Africa, and South and Central America. These lakes span all tectonic environments, and a range of magma compositions. We focus on analysis of the lake surface motion using image velocimetry, which reveals both similarities and contrasts in outgassing and lake dynamics when comparing the different lakes. We identify two categories of lake behavior: Organized (Erta'Ale, Nyiragongo, Kīlauea after 2011, and Erebus) and Chaotic (Villarrica, Masaya, Marum). This division does not map directly to lake size, viscosity, gas emission rate, or temperature. Instead, when examined together, we find that the lakes follow a linear relationship between average surface speed and the ratio of total gas flux to lake surface area. This relationship points to the combined importance of both flux and lake size in addition to the total volume of gas emission, and suggests that a shared deep mechanism controls the supply of heat and gas to all lakes. On the other hand, the differences between Chaotic and Organized lakes highlight the important role of the geometry of the conduit-lake transition, which superimposes a shallow signal on that of the deep circulation. The spatial patterns of surface motion we document suggest that the release of gas bubbles at Chaotic lakes is more efficient (i.e., bubbles are less likely to be retained and recycled) compared with Organized lakes. In addition, the data presented here indicate that the solidified crust of Organized lakes plays a role in regulating convection and outgassing in lava lakes.
description: Supplement to: Lev, Einat; Ruprecht, Philipp; Oppenheimer, Clive; Peters, Nial; Patrick, Matt; Hernandez, Pedro A; Spampinato, Letizia; Marlow, Jeff (2019): A global synthesis of lava lake dynamics. Journal of Volcanology and Geothermal Research, 381, 16-31
DOI: 10.1594/pangaea.910311
title: δ18O and Mg/Ca thermometry in planktonic foraminifera - links to excel files
DOI: 10.1594/pangaea.915920
title: Palynological data and pollen-based climate reconstructions from Lake Ohrid during MIS 12-11
DOI: 10.1594/pangaea.914894
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG09
DOI: 10.1594/pangaea.914895
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG11
DOI: 10.1594/pangaea.914900
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG21
DOI: 10.1594/pangaea.914988
title: Concentrations of IPL-derived fatty acids and phytane in lipid extracts obtained by filtering eruption fluids from Crystal Geyser
DOI: 10.1594/pangaea.914863
title: Hydrological data from Crystal Geyser, Utah, USA, determined with levelogger 1

description: Deployed at ~10 mbTOCOffset: 0.000000 mAltitude: 1243.000000 mDensity: 1.000000 kg/L
DOI: 10.1594/pangaea.914864
title: Hydrological data from Crystal Geyser, Utah, USA, determined with levelogger 2

description: Levelogger 2: Deployed at ~6 mbTOCProject ID: 42125Offset: 0.000000 mAltitude: 1243.000000 mDensity: 1.000000 kg/L
DOI: 10.1594/pangaea.914865
title: Sampling information from Crystal Geyser, Utah, USA
DOI: 10.1594/pangaea.914892
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG05
DOI: 10.1594/pangaea.914893
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG07
DOI: 10.1594/pangaea.910277
title: (Table 5) Stable oxygen isotope and Mg/Ca ratios of foraminifera from surface sediments
DOI: 10.1594/pangaea.914896
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG13
DOI: 10.1594/pangaea.914897
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG15
DOI: 10.1594/pangaea.914898
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG17
DOI: 10.1594/pangaea.914899
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG19
DOI: 10.1594/pangaea.914901
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG23
DOI: 10.1594/pangaea.914902
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG24
DOI: 10.1594/pangaea.914903
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG25
DOI: 10.1594/pangaea.914904
title: Concentrations, fractional abundance, and characteristics of intact polar lipids in lipid extracts obtained by filtering eruption fluids from Crystal Geyser, sample CG29
DOI: 10.1594/pangaea.914989
title: Carbon isotopic composition of dissolved inorganic carbon and IPL-derived fatty acids and phytane in lipid extracts obtained by filtering eruption fluids from Crystal Geyser
DOI: 10.1594/pangaea.921121
title: Rhyolitic tephra composition in sediment cores OB16A and OB16B from Orakei maar, Auckland, New Zealand

description: Rhyolitic tephra data (Major element oxides from glass shards) from Orakei maar, Auckland, New Zealand, measured at the electron microprobe at Victoria University of Wellington (New Zealand)
DOI: 10.1594/pangaea.921122
title: Basaltic tephra composition in sediment cores OB16A and OB16B from Orakei maar, Auckland, New Zealand

description: Basaltic tephra data (Major element oxides from glass shards) from Orakei maar, Auckland, New Zealand, measured at the electron microprobe at Victoria University of Wellington (New Zealand)
DOI: 10.1594/pangaea.921134
title: Paleomagnetic data from sediment cores OB16A and OB16B from Orakei maar, Auckland, New Zealand

description: Paleomagnetic data (Inclination, Declination, Natural Remanent Magnetisation, Anhysteretic remanent magnetistation, Isothermal remanent magnetisation, Magnetic susceptibility) from Orakei maar, Auckland, New Zealand, measured at Lund University (Sweden)
DOI: 10.1594/pangaea.933116
title: Micro-XRF data of Orakei Basin (New Zealand)

description: Presented are 87645 Itrax micro-XRF elemental downcore variation data points from Orakei Basin on the ECD scale and on the age scale. The ECD was developed in Peti and Augustinus (2019), the age model was developed in Peti et al. (2020).The data spans the time interval ca. 132 to 9.8 ka.Itrax micro-XRF data was acquired for all cores was acquired with an Itrax micro-XRF core scanner (Cox Analytical Systems, Gothenburg, Sweden) equipped with the Mo X-ray tube (at 30 kV, 55 mA) at 1 mm spatial resolution and 10 s exposure time/measurement interval. We use the reported data for paleoenvironmental reconstructions over the given time frame and comparison with other sites in the region.
DOI: 10.1594/pangaea.928538
title: Mycoplankton diversity in the Elbe River

description: Rivers are important transport systems for nutrients and organic material and thus influence biogeochemical cycles and food web structures. Microorganismal biodiversity is an important parameter for the ecological balance of river ecosystems. Despite the knowledge that freshwater fungi perform important ecological functions, there is scarcely any fungal data available for river systems. In this study, we address the fundamental question of how mycoplankton communities are structured and assembled over a longer river section with strong environmental gradients and anthropogenic pressure and what variables control on it. The mycoplankton communities from the shallow freshwater to the coastal-oceanic transition zone were analyzed based on 18S rRNA gene tag-sequencing and the observed patterns were related to environmental and spatial factors by multivariate statistics. Finally, the underlying assembly processes were revealed by Quantitative Process Estimates (QPE) method. The partitioning of mycoplankton communities deviated from the previously described patterns of fluvial microbial communities, triggered by a strong influence of local environmental conditions, which were partly under spatial control. The deepening of the Elbe River for improved navigation purpose seemed to have a strong secondary effect. The salinity gradient was the most explaining variable and zoosporic fungi showed higher sensitivity to high salinity levels. Consequently, none of the zoosporic taxon groups occurred solely in the marine environment. Significant differences were found in the assemblage processes with a dominance of environmental selection in the upstream region compared to undominated processes in downstream and coastal transition regions. The results suggest that fungi play various ecological roles along the diverse river sections and that their biotic interactions become more complex in the estuary. These results provide an important framework to help predict the functional consequences of changes in mycoplankton community structure and to help conserve microbial biodiversity in river ecosystems.
DOI: 10.1594/pangaea.928163
title: DH-GAP04 borehole DTS temperature, average September 2016 to August 2017
DOI: 10.1594/pangaea.928193
title: DH-GAP04 borehole hydraulic head, 2011 to 2018, Greenland

description: The 650 m long proglacial bedrock borehole DH-GAP04 is angled under the Greenland Ice Sheet and is the only bedrock borehole in the Arctic providing deep groundwater information at an active ice sheet setting. DH-GAP04 is drilled at the Greenland ice sheet margin and the lower part of the borehole extends in under the ice sheet. Permafrost is observed in the upper ~400 m of the borehole. DH-GAP04 is outfitted with a downhole instrument cluster that includes two inflatable packers, which divides the borehole in three sections: Section Up (400-561 m), Section Mid (561-571 m) and Section Low ( 571-651 m). Absolute pressure is measured in each section at 1-4 hour intervals and converted to hydraulic head. This dataset presents the daily average hydraulic head record spanning July, 2011 to December, 2018. Details on how absolute pressure is converted to hydraulic head is found in the accompanying "READ ME" file.
DOI: 10.1594/pangaea.945251
title: Transmittance through sea ice from Radiation Station 2007R24

description: Solar radiation over and under sea ice was measured by an autonomous platform, installed on drifting sea ice in the Arctic Ocean during the SV TARA drift campaign in 2007 (station name 2007R24). The resulting time series describes radiation measurements as a function of place and time between 28 April 2007 and 05 September 2007 in sample intervals of 30 minutes. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm) and photosynthetically active radiation (PAR, 400 to 700 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 2 m above the sea ice surface. The third sensor was mounted 1.4 m underneath the sea ice measuring the downward transmitted irradiance.
description: The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, sun: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05
DOI: 10.1594/pangaea.945267
title: Transmitted irradiance through sea ice from Radiation Station 2007R24

description: Solar radiation over and under sea ice was measured by an autonomous platform, installed on drifting sea ice in the Arctic Ocean during the SV TARA drift campaign in 2007 (station name 2007R24). The resulting time series describes radiation measurements as a function of place and time between 28 April 2007 and 05 September 2007 in sample intervals of 30 minutes. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm) and photosynthetically active radiation (PAR, 400 to 700 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 2 m above the sea ice surface. The third sensor was mounted 1.4 m underneath the sea ice measuring the downward transmitted irradiance.
description: The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, sun: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05 .
DOI: 10.1594/pangaea.945268
title: Reflected irradiance at the sea surface from Radiation Station 2007R24

description: Solar radiation over and under sea ice was measured by an autonomous platform, installed on drifting sea ice in the Arctic Ocean during the SV TARA drift campaign in 2007 (station name 2007R24). The resulting time series describes radiation measurements as a function of place and time between 28 April 2007 and 05 September 2007 in sample intervals of 30 minutes. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm) and photosynthetically active radiation (PAR, 400 to 700 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 2 m above the sea ice surface. The third sensor was mounted 1.4 m underneath the sea ice measuring the downward transmitted irradiance.
description: The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, sun: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05 .
DOI: 10.1594/pangaea.945269
title: Incident irradiance at 2 m above sea ice from Radiation Station 2007R24

description: Solar radiation over and under sea ice was measured by an autonomous platform, installed on drifting sea ice in the Arctic Ocean during the SV TARA drift campaign in 2007 (station name 2007R24). The resulting time series describes radiation measurements as a function of place and time between 28 April 2007 and 05 September 2007 in sample intervals of 30 minutes. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm) and photosynthetically active radiation (PAR, 400 to 700 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 2 m above the sea ice surface. The third sensor was mounted 1.4 m underneath the sea ice measuring the downward transmitted irradiance.
description: The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, sun: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05 .
DOI: 10.1594/pangaea.945270
title: Albedo measurements from Radiation Station 2020R24

description: Solar radiation over and under sea ice was measured by an autonomous platform, installed on drifting sea ice in the Arctic Ocean during the SV TARA drift campaign in 2007 (station name 2007R24). The resulting time series describes radiation measurements as a function of place and time between 28 April 2007 and 05 September 2007 in sample intervals of 30 minutes. The radiation measurements have been performed with spectral radiometers. All data are given in full spectral resolution interpolated to 1.0 nm, and integrated over the entire wavelength range (broadband, total: 320 to 950 nm) and photosynthetically active radiation (PAR, 400 to 700 nm). Two sensors, solar irradiance and upward reflected solar irradiance, were mounted on a on a platform about 2 m above the sea ice surface. The third sensor was mounted 1.4 m underneath the sea ice measuring the downward transmitted irradiance.
description: The data set has been processed and contains quality flags for different kinds for erroneous data. Flag values are the sum of individual error codes. The value of 0 refers to no error. Quality flag, position: The geographic position is flagged +1 if the drift velocity, as derived from the GPS longitude and latitude, exceeds a threshold of 10 deg latitude or 50 deg longitude per time step; +2 if the position exceeds extreme values, such as longitude &gt; 360 deg; +4 if the position is exactly 0.0. Quality flag, sun elevation: If the suns position is close to the horizon, the radiometers measure a very noisy signal. Radiometer measurements and variables which are computed from them are flagged +1 if the sun elevation is below 10 degrees; +2 if the broad band albedo exceeds the threshold 1.05.
DOI: 10.1594/pangaea.945341
title: PAR measurements at Hansneset, Kongsfjorden, above and below kelp canopies from 2012 to 2013

description: Calibrated diurnal variation of irradiance in the PAR range (Ed(PAR,Z)) (10 min intervals) (in µmol/m²/s) measured at several depths above and below the kelp forest off Hansneset between 5 to 31 July 2012. The Odyssey loggers were mounted on each of four vertical racks which were fixed at the seafloor at 2.5, 5, 10 and 15 m depth MLW accompanying the study of Bartsch et al. (2016) (Polar Biology; doi:10.1007/s00300-015-1870-1). One logger was installed below the kelp canopy, approx. 20 cm (±10 cm) above the seafloor representing the “below canopy” situation, and another logger was mounted 90 cm (±10 cm) above the first logger, representing the “above canopy” situation. At 15 m depth, there was only one sensor above ground as this was below the kelp forest in the red algal zone. The loggers at the 10 and 15 m depths were left to run until June 2013 however, as the sensors were not cleaned in regular intervals from August 2012 onwards, absolute values have to be considered with care.
DOI: 10.1594/pangaea.936027
title: Radium isotopes and 228Th in water column samples collected on POLARSTERN expedition PS100

description: Radium isotopes are produced by decay of an isotope of thorium, a highly particle reactive element. Radium is relatively soluble in seawater such that once a thorium isotope in suspended or bottom sediments decays, a fraction of the produced radium isotope may be released to solution. 228Ra is strongly enriched in shelf waters and in the Transpolar Drift (TPD) and its half-life (5.8 years) is well suited to study the fate of this shelf-derived water in the central Arctic. The 228Th/228Ra ratio in the subsurface water column can be used to trace particle fluxes. In previous studies up to PS94 (2015) we had identified the strong and increasing 228Ra signal in the Transpolar Drift. During PS100 we studied the distribution of 228Ra in Fram Strait to investigate how this 228Ra signal in the TPD is changed by dilution and decay on its way to the East Greenland Current. Water from in situ pumps was filtered and passed over MnO2-coated cartridges to absorb the Ra and Th. On board, short-lived Radium isotopes and 228Th were analysed using RaDeCC counting. In the lab, the cartridges were leached in refluxing HCl and long-lived Radium isotopes were measured by gamma spectroscopy.At depths where in situ pumps were deployed with two cartridges in series, the Ra adsorption efficiency was determined from the ratio of the Ra activities in the two cartridges. At depths where only one cartridge was mounted, we used the average collection efficiency of all other cartridge pairs, corrected after a mass spectrometric analysis of 226Ra activities in discrete samples (Vieira et al., 2021, doi:10.1002/lom3.10428) (82 ± 8%).
DOI: 10.1594/pangaea.936029
title: Radium isotopes and 228Th in surface water samples collected on POLARSTERN expedition PS100

description: Radium isotopes are produced by decay of an isotope of thorium, a highly particle reactive element. Radium is relatively soluble in seawater such that once a thorium isotope in suspended or bottom sediments decays, a fraction of the produced radium isotope may be released to solution. 228Ra is strongly enriched in shelf waters and in the Transpolar Drift (TPD) and its half-life (5.8 years) is well suited to study the fate of this shelf-derived water in the central Arctic. The 228Th/228Ra ratio in the subsurface water column can be used to trace particle fluxes. In previous studies up to PS94 (2015) we had identified the strong and increasing 228Ra signal in the Transpolar Drift. During PS100 we studied the distribution of 228Ra in Fram Strait to investigate how this 228Ra signal in the TPD is changed by dilution and decay on its way to the East Greenland Current. Water from the ship's seawater intake was filtered and passed over MnO2-coated cartridges to absorb the Ra and Th. On board, short-lived Radium isotopes and 228Th were analysed using RaDeCC counting. In the lab, the cartridges were leached in refluxing HCl and long-lived Radium isotopes were measured by gamma spectroscopy.
DOI: 10.1594/pangaea.936245
title: Planktonic foraminiferaof surface sediments
DOI: 10.1594/pangaea.936247
title: Depth profiles of fluorescence, temperature and salinity from the plankton net CALIBERIA/Ib-F1 samples
DOI: 10.1594/pangaea.936253
title: Concentration of the most abundant planktonic foraminifera species collected in the plankton net CALIBERIA/Ib-F1