468 Works

Master tracks in different resolutions during POLAR 5 campaign AIRMETH_2018

Jörg Hartmann
This dataset was created via processing of raw position data acquired by the GPS sensor for scientific equipment on Polar 6/Polar 5 to receive a validated master track which is used as reference of further expedition data.

Plant biomass data (measured from 2012 to 2015) and plant trait data (measured in 2015), supplement to: van Moorsel, Sofia J; Hahl, Terhi; Wagg, Cameron; De Deyn, Gerlinde B; Flynn, Dan F B; Zuppinger-Dingley, Debra; Schmid, Bernhard; Chave, Jerome (2018): Community evolution increases plant productivity at low diversity. Ecology Letters, 21(1), 128-137

Sofia J van Moorsel, Terhi Hahl, Cameron Wagg, Gerlinde B De Deyn, Dan F B Flynn & Debra Zuppinger-Dingley
The present study was conducted at the Jena Experiment field site from 2011 to 2015. The 48 experimental plant communities included twelve monocultures (of which one was removed from all analyses because it was planted with the wrong species), twelve 2-species mixtures, twelve 4-species mixtures and twelve 8-species mixtures. We used two community-evolution treatments (plant histories); plants with eight years of co-selection history in different plant communities in the Jena Experiment (communities of co-selected plants)...

Carbon and nitrogen turnover during an in situ experiment with addition of Thalassiosira sp. and E. huxleyi phytodetritus at AWI-HAUSGARTEN S2 in 2013, supplement to: Braeckman, Ulrike; Janssen, Felix; Lavik, Gaute; Elvert, Marcus; Marchant, Hannah K; Buckner, Caroline; Bienhold, Christina; Wenzhöfer, Frank (2018): Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus. Biogeosciences, 15(21), 6537-6557

Ulrike Braeckman, Felix Janssen, Gaute Lavik, Marcus Elvert, Hannah K Marchant, Caroline Buckner, Christina Bienhold & Frank Wenzhöfer
This is a dataset from an in situ experiment at station S2 from the LTER monitoring site HAUSGARTEN, performed in June-July 2013 during Maria S Merian expedition MSM29. The in situ responses of Arctic deep-sea benthos to input of phytodetritus of a diatom (Thalassiosira sp.) as opposed to a coccolithophorid (Emiliania huxleyi) were investigated in incubation chambers of benthic landers. Using 13C and 15N labelled phytodetritus harvested from cultures of these species, we traced the...

Master tracks in different resolutions during POLAR 5 campaign PAMARCMIP_2018

Andreas Herber
This dataset was created via processing of raw position data acquired by the GPS sensor for scientific equipment on Polar 6/Polar 5 to receive a validated master track which is used as reference of further expedition data.

Miocene Biomarker Temperature and CO2 Estimates from DSDP Site 94-608, supplement to: Super, James R; Thomas, Ellen; Pagani, Mark; Huber, Matthew; O'Brien, Charlotte; Hull, Pincelli M (2018): North Atlantic temperature and pCO2 coupling in the early-middle Miocene. Geology, 46(6), 519-522

James R Super, Ellen Thomas, Mark Pagani, Matthew Huber, Charlotte L O'Brien & Pincelli M Hull
Climate proxies indicate coupling between changes in atmospheric pCO2, global temperatures and ice volume over much of the Cenozoic. Evidence has been presented for decoupling of these factors in the Miocene, though the cause of the apparent decoupling was uncertain. Here, we revisit Deep Sea Drilling Program (DSDP) Site 608 (24-9 Ma) in the North Atlantic, to provide improved constraints on sea surface temperatures (SSTs) using the TEX86 and Uk'37 proxies, and use these to...

Abundance and distribution of planktonic Copepoda in the Southern Ocean and other regions from 1980 to 2005, supplement to: Cornils, Astrid; Sieger, Rainer; Mizdalski, Elke; Schumacher, Stefanie; Grobe, Hannes; Schnack-Schiel, Sigrid B (2018): Copepod species abundance from the Southern Ocean and other regions (1980 - 2005) - a legacy. Earth System Science Data, 10, 1457-1471

Astrid Cornils & Sigrid B Schnack-Schiel
This data collection originates from the efforts of Sigrid Schnack-Schiel (1946–2016), a zooplankton ecologist with great expertise in life cycle strategies of Antarctic calanoid copepods, who also investigated zooplankton communities in tropical and subtropical marine environments. Here, we present 33 data sets with abundances of planktonic copepods from 20 expeditions to the Southern Ocean (Weddell Sea, Scotia Sea, Amundsen Sea, Bellingshausen Sea, Antarctic Peninsula), one expedition to the Magellan region, one latitudinal transect in the...

Different Mid-Pleistocene transition analysis from IODP Site 306-U1314, supplement to: Hernández-Almeida, Iván; Sierro, Francisco Javier; Flores, José-Abel; Cacho, Isabel; Filippelli, Gabriel M (2013): Palaeoceanographic changes in the North Atlantic during the Mid-Pleistocene Transition (MIS 31-19) as inferred from planktonic foraminiferal and calcium carbonate records. Boreas, 42(1), 140-159

Iván Hernández-Almeida, Francisco Javier Sierro, José-Abel Flores, Isabel Cacho & Gabriel M Filippelli
Marine sediments from the Integrated Ocean Drilling Project (IODP) Site U1314 (56.36°N, 27.88°W), in the subpolar North Atlantic, were studied for their planktonic foraminifera, calcium carbonate content, and Neogloboqudrina pachyderma sinistral (sin.) δ13C records in order to reconstruct surface and intermediate conditions in this region during the Mid‐Pleistocene Transition (MPT). Variations in the palaeoceanography and regional dynamics of the Arctic Front were estimated by comparing CaCO3 content, planktonic foraminiferal species abundances, carbon isotopes and ice‐rafted...

Hemipelagic and turbiditic deposits constrain lower Bengal Fan depositional history through Pleistocene climate, monsoon, and sea level transitions, supplement to: Weber, Michael E; Reilly, Brendan T (2018): Hemipelagic and turbiditic deposits constrain lower Bengal Fan depositional history through Pleistocene climate, monsoon, and sea level transitions. Quaternary Science Reviews, 199, 159-173

Michael E Weber & Brendan T Reilly
The Bengal Fan contains the most complete record of Himalayan climate and tectonics. As the largest fan system of the world it is fed by the Ganges-Brahmaputra river systems. International Ocean Discovery Program (IODP) Expedition 354 retrieved seven sites along an east-west core transect at 8°N in the lower Bengal Fan. We studied the Pleistocene sections of these sites to provide constraints on the depositional history of the last 1.25 Ma. Lowresolution bio- and magnetostratigraphic...

Hydrochemistry, runoff and mapped disturbances of Low Arctic Watersheds on Herschel Island, Yukon Territory, Canada, in year 2016, supplement to: Coch, Caroline; Ramage, Justine L; Lamoureux, Scott F; Meyer, Hanno; Knoblauch, Christian; Lantuit, Hugues (2020): Spatial variability of dissolved organic carbon, solutes, and suspended sediment in disturbed low Arctic coastal watersheds. Journal of Geophysical Research: Biogeosciences, 125(2)

Caroline Coch, Justine L Ramage, Scott F Lamoureux, Hanno Meyer, Christian Knoblauch & Hugues Lantuit
Geospatial Data:- Watershed delineation based on hydrology toolbox in ArcGIS (ESRI, version 10.3)- Mapped disturbances based on aerial photographs from 1952 and 1970 (for Ice Creek East, Ice Creek West and Eastern Gully only) and satellite imagery from 2011 (GeoEye-1) and 2015 (WorldView2). Note that no disturbances were found in Slump D creek.Hydrology Data:- Manual flow measurements with the Flo-Mate 2000 Flow Meter different streams on Herschel Island- Runoff data in Ice Creek East -...

New and regenerated sources of nitrogen: from the ice edge to the equator in the South Pacific Ocean

Eric J Raes, Jodie Van De Kamp, Levente Bodrossy, Allison A Fong, Jessica Riekenberg, Bradley D Eyre & Anya M Waite
The distribution of diazotrophs and the magnitude of N2 fixation along with the input of new N through this process remains poorly constrained globally, but particularly in the Southern Pacific Ocean. Here we present a high-resolution dataset (every 0.5° latitude) describing the different N-cycling pathways which control the fixation and sequestration of carbon in the surface waters along a 7000 km transect in the South Pacific Ocean. Key oceanographic features along the P15S GO-SHIP transect...

Near-future carbon dioxide levels impair the olfactory system of a marine fish, supplement to: Porteus, Cosima S; Hubbard, Peter C; Uren Webster, Tamsyn M; van Aerle, Ronny; Canário, Adelino V M; Santos, Eduarda; Wilson, Rod W (2018): Near-future CO2 levels impair the olfactory system of a marine fish. Nature Climate Change, 8(8), 737-743

Cosima S Porteus, Peter C Hubbard, Tamsyn M Uren Webster, Ronny van Aerle, Adelino V M Canário, Eduarda Santos & R W Wilson
Survival of marine fishes exposed to elevated near-future CO2 levels is threatened by their altered responses to sensory cues. Here we demonstrate a novel physiological and molecular mechanism based in the olfactory system which helps explain altered behavior under elevated CO2. We combine electrophysiology and high throughput sequencing with behavioral experiments to investigate how elevated CO2 affects the olfactory system of European sea bass (Dicentrarchus labrax), an economically important species. Under elevated CO2 (~1000 µatm)...

Geotechnical analysis on sediment cores from the Antarctic Peninsula, supplement to: Holler, Peter (1985): Geotechnical properties of Antarctic deep sea sediments. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C39, 23-36

Peter Holler
Sedimentological and geotechnical analyses were carried out on two undisturbed large diameter deep sea cores from the Antarctic sector of the Atlantic ocean. One core, from a silled basin within the Bransfield Strait is characterized by fine grained hemipelagic material and turbidite layers. The other core, from the continental slope of the Weddell Sea represents a typical glacial marine environment. The variations of physical properties as related to both an increasing overburden pressure (or depth...

Biomarker distribution of sediment core PS93/006-1, supplement to: Kremer, Anne; Stein, Ruediger; Fahl, Kirsten; Bauch, Henning A; Mackensen, Andreas; Niessen, Frank (2018): A 190-ka biomarker record revealing interactions between sea ice, Atlantic Water inflow and ice sheet activity in eastern Fram Strait. arktos - The Journal of Arctic Geosciences, 4(1)

Ruediger Stein, Anne Kremer & Kirsten Fahl
The northeastern Fram Strait at the entrance to the Arctic Ocean represents a key observatory for sea ice reconstructions as it sensitively reacts to environmental changes. A combined biomarker approach (HBIs, sterols, alkenones) was carried out on Core PS93/006-1 from the western Svalbard margin to reconstruct sea ice conditions related to glacial-interglacial cycles of the last 190 ka. The continuous presence of sea ice demonstrates the strong influence of the East Greenland Current in the...

NGR wireline logs and organic geochemistry data of IODP Site 356-U1463, supplement to: Christensen, Beth A; Renema, Willem; Henderiks, Jorijntje; De Vleeschouwer, David; Groeneveld, Jeroen; Castañeda, Isla S; Reuning, Lars; Bogus, Kara A; Auer, Gerald; Ishiwa, Takeshige; McHugh, Cecilia M G; Gallagher, Stephen John; Fulthorpe, Craig S; IODP Expedition 356 Scientists (2017): Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene. Geophysical Research Letters, 44(13), 6914-6925

Beth A Christensen, Willem Renema, Jorijntje Henderiks, David De Vleeschouwer, Jeroen Groeneveld, Isla S Castañeda, Lars Reuning, Kara A Bogus, Gerald Auer, Takeshige Ishiwa, Cecilia M G McHugh, Stephen John Gallagher, Craig S Fulthorpe &
Late Miocene to mid‐Pleistocene sedimentary proxy records reveal that northwest Australia underwent an abrupt transition from dry to humid climate conditions at 5.5 million years (Ma), likely receiving year‐round rainfall, but after ~3.3 Ma, climate shifted toward an increasingly seasonal precipitation regime. The progressive constriction of the Indonesian Throughflow likely decreased continental humidity and transferred control of northwest Australian climate from the Pacific to the Indian Ocean, leading to drier conditions punctuated by monsoonal precipitation....

Ice thickness from radio-echo sounding (RES) and radar attenuation from numerical modelling for Recovery Glacier, Antarctica, supplement to: Humbert, Angelika; Steinhage, Daniel; Helm, Veit; Beyer, Sebastian; Kleiner, Thomas (2018): Missing Evidence of Widespread Subglacial Lakes at Recovery Glacier, Antarctica. Journal of Geophysical Research-Earth Surface, 123(11), 2802-2826

Angelika Humbert, Daniel Steinhage, Veit Helm, Sebastian Beyer & Thomas Kleiner
Recovery Glacier reaches far into the East Antarctic Ice Sheet. Recent projections point out that its dynamic behaviour has a considerable impact on future Antarctic ice loss (Golledge et al. 2017). Subglacial lakes are thought to play a major role in the initiation of the rapid ice flow (Bell et al. 2007). Satellite altimetry observations have even suggested several actively filling and draining subglacial lakes beneath the main trunk (Smith et al. 2009). We present...

Pore water and solid phase data; short sediment cores from Maxwell Bay and Potter Cove, King George Island (Antarctica), supplement to: Henkel, Susann; Kasten, Sabine; Hartmann, Jan; Silva Busso, A; Staubwasser, Michael (2018): Iron cycling and stable Fe isotope fractionation in Antarctic shelf sediments, King George Island. Geochimica et Cosmochimica Acta

Susann Henkel, Sabine Kasten, Jan Hartmann, A Silva Busso & Michael Staubwasser
Geochemical data were gained for short sediment cores from Maxwell Bay and Potter Cove (King George Island, Antarctica) in 2012 and 2013. We investigated the influence of different iron transport pathways and their effect on the early diagenetic cycling of this nutrient.The dataset includes pore water data (alkalinity, sulfate, Fe2+, NH4+) for 14 sites and solid phase data (including stable iron isotope data for sequentially extracted Fe pools) as well as pore water stable iron...

Noble gas measurements beneath Filchner-Ronne Ice Sheet, supplement to: Huhn, Oliver; Hattermann, Tore; Davis, Peter E D; Dunker, Erich; Hellmer, Hartmut H; Nicholls, Keith W; Østerhus, Svein; Rhein, Monika; Schröder, Michael; Sültenfuß, Jürgen (2018): Basal Melt and Freezing Rates From First Noble Gas Samples Beneath an Ice Shelf. Geophysical Research Letters, 45(16), 8455-8461

Oliver Huhn, Tore Hattermann, Peter Davis, Erich Dunker, Hartmut H Hellmer, Svein Østerhus, Monika Rhein, Michael Schröder, Jürgen Sültenfuß & Keith W Nicholls
A climatically induced acceleration in ocean‐driven melting of Antarctic ice shelves would have consequences for both the discharge of continental ice into the ocean and thus global sea level, and for the formation of Antarctic Bottom Water and the oceanic meridional overturning circulation. Using a novel gas‐tight in situ water sampler, noble gas samples have been collected from six locations beneath the Filchner Ice Shelf, the first such samples from beneath an Antarctic ice shelf....

231Pa/230Th measurements and related isotope series and SiO2 of five sediment cores from the Southwest Pacific

Thomas A Ronge, Jörg Lippold, Walter Geibert, Samuel L Jaccard, Sebastian Mieruch-Schnülle, Finn Süfke & Ralf Tiedemann
Downcore measurements of SiO2 and 231Pa/230Th on sediment cores from the New Zaland Margin and the East Pacific Rise. The sediment cores were collected during expedtions PS75 (2010) and SO213 (2011).Our downcore records cover the last ~35 ka. SiO2 measurements were conducted to analyze a potential impact on opal on our 231Pa/230Th ratios, that in turn were used to reconstruct past changes in South Pacific Overtruning Circulation.Opal measurements followed the method of Müller and Schneider...

AUV MARUM-SEAL Dive 71-73: High resolution bathymetry and backscatter of Venere Mud Vulcano, supplement to: Loher, Markus; Ceramicola, Silvia; Wintersteller, Paul; Meinecke, Gerrit; Sahling, Heiko; Bohrmann, Gerhard (2018): Mud volcanism in a canyon: Morphodynamic evolution of the active Venere mud volcano and its interplay with Squillace Canyon, Central Mediterranean. Geochemistry, Geophysics, Geosystems, 19(2), 356-378

Markus Loher, Silvia Ceramicola, Paul Wintersteller, Gerrit Meinecke, Heiko Sahling & Gerhard Bohrmann
Submarine mud volcanoes develop through the extrusion of methane-rich fluids and sediments onto the seafloor. The morphology of a mud volcano can record its extrusive history and processes of erosion and deformation affecting it. The study of offshore mud-volcano dynamics is limited because only few have been mapped at resolutions that reveal their detailed surface structures. More importantly, rates and volumes of extruded sediment and methane are poorly constrained. The 100 m high twin cones...

Temperature, chloride and sulfate measurements of samples from RV METEOR cruise M112, supplement to: Loher, Markus; Pape, Thomas; Marcon, Yann; Römer, Miriam; Wintersteller, Paul; Praeg, Daniel; Torres, Marta E; Sahling, Heiko; Bohrmann, Gerhard (2018): Mud extrusion and ring-fault gas seepage – upward branching fluid discharge at a deep-sea mud volcano. Scientific Reports, 8, 6275

Markus Loher, Thomas Pape, Yann Marcon, Miriam Römer, Paul Wintersteller, Daniel Praeg, Marta E Torres, Heiko Sahling & Gerhard Bohrmann
Submarine mud volcanoes release sediments and gas-rich fluids at the seafloor via deeply-rooted plumbing systems that remain poorly understood. Here the functioning of Venere mud volcano, on the Calabrian accretionary prism in ~1,600 m water depth is investigated, based on multi-parameter hydroacoustic and visual seafloor data obtained using ship-borne methods, ROVs, and AUVs. Two seepage domains are recognized: mud breccia extrusion from a summit, and hydrocarbon venting from peripheral sites, hosting chemosynthetic ecosystems and authigenic...

Time series of ice nuclei concentration at Cape Verde, supplement to: Welti, André; Müller, Konrad; Fleming, Zoë L; Stratmann, Frank (2018): Concentration and variability of ice nuclei in the subtropical maritime boundary layer. Atmospheric Chemistry and Physics, 18(8), 5307-5320

André Welti, Konrad Müller, Zoë L Fleming & Frank Stratmann
Cumulative ice nuclei concentration as function of temperature determined using filter samples collected at the Cape Verde Atmospheric Observatory. Samples cover the year 2009-2013. Measurements cover the temperature range 0°C to -20°C.Additional concentration measurements obtained with the SPIN CFDC from an intense campaign in Jan.-Feb. 2016 at the Cape Verde Atmospheric Observatory complement the dataset at temperatures below -24°C.

Transport, properties and life-cycles of mesoscale eddies in the eastern tropical South Pacific, supplement to: Czeschel, Rena; Schütte, Florian; Weller, Robert A; Stramma, Lothar (2018): Transport, properties, and life cycles of mesoscale eddies in the eastern tropical South Pacific. Ocean Science, 14(4), 731-750

Rena Czeschel, Florian Schütte, Robert A Weller & Lothar Stramma
The influence of mesoscale eddies on the flow field and the water masses, especially the oxygen distribution of the eastern tropical South Pacific is investigated from a mooring, float and satellite data set. Two anticyclonic (ACE1/2), one mode water (MWE) and one cyclonic eddy (CE) are identified and followed in detail with satellite data on their westward transition with velocities of 3.2 to 6.0 cm/s from their generation region, the shelf of the Peruvian and...

Biological and physical influences on marine snowfall at the equator - data collection, supplement to: Kiko, Rainer; Biastoch, Arne; Brandt, Peter; Cravatte, Sophie; Hauss, Helena; Hummels, Rebecca; Kriest, Iris; Marin, Frédéric; McDonnell, Andrew; Oschlies, Andreas; Picheral, Marc; Schwarzkopf, Franziska; Thurnherr, Andreas M; Stemmann, Lars (2017): Biological and physical influences on marine snowfall at the equator. Nature Geoscience

Rainer Kiko, Peter Brandt, Sophie Cravatte, Helena Hauss, Rebecca Hummels, Gerd Krahmann, Frédéric Marin, Andrew McDonnell, Marc Picheral, Pieter Vandromme, Andreas M Thurnherr & Lars Stemmann
High primary productivity in the equatorial Atlantic and Pacific oceans is one of the key features of tropical ocean biogeochemistry and fuels a substantial flux of particulate matter towards the abyssal ocean. How biological processes and equatorial current dynamics shape the particle size distribution and flux, however, is poorly understood. Here we use high-resolution size-resolved particle imaging and Acoustic Doppler Current Profiler data to assess these influences in equatorial oceans. We find an increase in...

Paleocene - Eocene Thermal Maximum (PETM) study of ODP Hole 159-959D, supplement to: Frieling, Joost; Reichart, Gert-Jan; Middelburg, Jack J; Röhl, Ursula; Westerhold, Thomas; Bohaty, Steven M; Sluijs, Appy (2018): Tropical Atlantic climate and ecosystem regime shifts during the Paleocene-Eocene Thermal Maximum. Climate of the Past, 14(1), 39-55

Joost Frieling, Gert-Jan Reichart, Jack J Middelburg, Ursula Röhl, Thomas Westerhold, Steven M Bohaty & Appy Sluijs
The Paleocene - Eocene Thermal Maximum (PETM; 56 Ma) was a phase of rapid global warming associated with massive carbon input into the ocean-atmosphere system from a 13C-depleted reservoir. Many mid- and high-latitude sections have been studied and document changes in salinity, hydrology and sedimentation, deoxygenation, biotic overturning and migrations, but detailed records from tropical regions are lacking. Here, we study the PETM at Ocean Drilling Program (ODP) Site 959 in the equatorial Atlantic using...

Pollen, spore, and dinoflagellate cyst assemblages of sediment core GeoB2107-3, supplement to: Gu, Fang; Zonneveld, Karin A F; Chiessi, Cristiano Mazur; Arz, Helge Wolfgang; Pätzold, Jürgen; Behling, Hermann (2017): Long-term vegetation, climate and ocean dynamics inferred from a 73,500 years old marine sediment core (GeoB2107-3) off southern Brazil. Quaternary Science Reviews, 172, 55-71

Fang Gu, Karin A F Zonneveld, Cristiano Mazur Chiessi, Helge Wolfgang Arz, Jürgen Pätzold & Hermann Behling
Long-term changes in vegetation and climate of southern Brazil, as well as ocean dynamics of the adjacent South Atlantic, were studied by analyses of pollen, spores and organic-walled dinoflagellate cysts (dinocysts) in marine sediment core GeoB2107-3 collected offshore southern Brazil covering the last 73.5 cal kyr BP. The pollen record indicates that grasslands were much more frequent in the landscapes of southern Brazil during the last glacial period if compared to the late Holocene, reflecting...

Registration Year

  • 2018
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  • Collection
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Affiliations

  • University of Iowa
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