666 Works

Upper air soundings during POLARSTERN cruise ARK-VII/1

Gert König-Langlo
The upper air soundings are normally performed once a day to measure vertical profiles of air pressure, temperature, relative humidity and the wind vector. Helium filled balloons (TOTEX 600 g, 800 g) were used to carry Vaisala RS80 radiosondes. Whenever possible, the launches were performed about 10 UTC. Condensed measurements (TEMP Format FM-35) were transferred without delay into the Global Telecommunication System GTS were they contribute for the world wide weather forecasts. The profile data...

Upper air soundings during POLARSTERN cruise ARK-VI/3

Gert König-Langlo
The upper air soundings are normally performed once a day to measure vertical profiles of air pressure, temperature, relative humidity and the wind vector. Helium filled balloons (TOTEX 600 g, 800 g) were used to carry Vaisala RS80 radiosondes. Whenever possible, the launches were performed about 10 UTC. Condensed measurements (TEMP Format FM-35) were transferred without delay into the Global Telecommunication System GTS were they contribute for the world wide weather forecasts. The profile data...

Paleoclimatate of the Middle Burdigalian-Langhian period in Turkey, supplement to: Kayseri Özer, Mine Sezgül; Akgün, Funda; Mayda, Serdar; Kaya, Tanju (2014): Palynofloras and vertebrates from Mugla-Oren region (SW Turkey) and palaeoclimate of the Middle Burdigalian-Langhian period in Turkey. Bulletin of Geosciences, 89(1), 137-162

Mine Sezgül Kayseri Özer, Funda Akgün, Serdar Mayda & Tanju Kaya
The Miocene is the last warm episode in Earth history, and this episode was well recorded in Turkey as shown by plant distribution and inferred numerical temperature values. In this study, Ören-Kultak, Hüssamlar and Karacaagac palynofloras from western Turkey, which are characterized by the thermophilous plants (Engelhardia, Sapotaceae, Cyrillaceae, Avicennia, Arecaceae, Palmae), are described. Age determinations of these palynofloras (middle Burdigalian-Langhian) are strengthened by the mammalian fossil record (MN4-5) and strontium isotope results. Palaeoclimate is...

Chlorophyll a in Arctic Ocean, Fram Strait, and Greenland Sea, 1991-2012, supplement to: Nöthig, Eva-Maria; Bracher, Astrid; Engel, Anja; Metfies, Katja; Niehoff, Barbara; Peeken, Ilka; Bauerfeind, Eduard; Cherkasheva, Alexandra; Gäbler-Schwarz, Stefanie; Hardge, Kristin; Kilias, Estelle; Kraft, Angelina; Mebrahtom Kidane, Yohannes; Lalande, Catherine; Piontek, Judith; Thomisch, Karolin; Wurst, Mascha (2015): Summertime plankton ecology in Fram Strait—a compilation of long- and short-term observations. Polar Research, 34, 18 pp

Eva-Maria Nöthig, Astrid Bracher, Anja Engel, Katja Metfies, Barbara Niehoff, Ilka Peeken, Eduard Bauerfeind, Alexandra Cherkasheva, Stefanie Gäbler-Schwarz, Kristin Hardge, Estelle Kilias, Angelina Kraft, Yohannes Mebrahtom Kidane, Catherine Lalande, Judith Piontek, Karolin Thomisch & Mascha Wurst
Between Greenland and Spitsbergen, Fram Strait is a region where cold ice-covered Polar Water exits the Arctic Ocean with the East Greenland Current (EGC) and warm Atlantic Water enters the Arctic Ocean with the West Spitsbergen Current (WSC). In this compilation, we present two different data sets from plankton ecological observations in Fram Strait: (1) long-term measurements of satellite-derived (1998-2012) and in situ chlorophyll a (chl a) measurements (mainly summer cruises, 1991-2012) plus protist compositions...

Upper air soundings during POLARSTERN cruise PS95.2 (ANT-XXXI/1.2)

Gert König-Langlo
The upper air soundings are normally performed once a day to measure vertical profiles of air pressure, temperature, relative humidity and the wind vector. Helium filled balloons (TOTEX 600 g, 800 g) were used to carry Vaisala RS92-SGPW radiosondes. Whenever possible, the launches were performed about 10 UTC. Condensed measurements (TEMP Format FM-35) were transferred without delay into the Global Telecommunication System GTS were they contribute for the world wide weather forecasts. The profile data...

High-resolution sedimentological and paleontological record of ODP Site 167-1019, supplement to: Barron, John A; Heusser, Linda E; Herbert, Timothy D; Lyle, Mitchell W (2003): High resolution climatic evolution of coastal Northern California during the past 16,000 Years. Paleoceanography, 18(1), 1020

John A Barron, Linda E Heusser, Timothy D Herbert & Mitchell W Lyle
Holocene and latest Pleistocene oceanographic conditions and the coastal climate of northern California have varied greatly, based upon high-resolution studies (ca. every 100 years) of diatoms, alkenones, pollen, CaCO3%, and total organic carbon at Ocean Drilling Program (ODP) Site 1019 (41.682°N, 124.930°W, 980 m water depth). Marine climate proxies (alkenone sea surface temperatures [SSTs] and CaCO3%) behaved remarkably like the Greenland Ice Sheet Project (GISP)-2 oxygen isotope record during the Bølling-Allerod, Younger Dryas (YD), and...

Nitrogen cycling driven by organic matter export in the South Pacific oxygen minimum zone, supplement to: Kalvelage, Tim; Lavik, Gaute; Lam, Phyllis; Contreras, Sergio; Arteaga, Lionel; Löscher, Carolin R; Oschlies, Andreas; Stramma, Lothar; Kuypers, Marcel MM (2013): Nitrogen cycling driven by organic matter export in the South Pacific oxygen minimum zone. Nature Geoscience, 6(3), 228-234

Tim Kalvelage, Gaute Lavik, Phyllis Lam, Sergio Contreras, Lionel Arteaga, Carolin R Löscher, Andreas Oschlies, Aurelien Paulmier, Lothar Stramma & Marcel MM Kuypers
Oxygen minimum zones are expanding globally, and at present account for around 20-40% of oceanic nitrogen loss. Heterotrophic denitrification and anammox-anaerobic ammonium oxidation with nitrite-are responsible for most nitrogen loss in these low-oxygen waters. Anammox is particularly significant in the eastern tropical South Pacific, one of the largest oxygen minimum zones globally. However, the factors that regulate anammox-driven nitrogen loss have remained unclear. Here, we present a comprehensive nitrogen budget for the eastern tropical South...

Representative analyses of pre-tectonic metabasic rocks and metapelitic gneiss from Sverdrupfjella, East Antarctica, supplement to: Board, W S; Frimmel, Hartwig E; Armstrong, Robert A (2005): Pan-African tectonism in the western Maud Belt: P-T-t path for high-grade gneisses in the H.U. Sverdrupfjella, East Antarctica. Journal of Petrology, 46(4), 671-699

W S Board, Hartwig E Frimmel & Robert A Armstrong
Extensive high-grade polydeformed metamorphic provinces surrounding Archaean cratonic nuclei in the East Antarctic Shield record two tectono-thermal episodes in late Mesoproterozoic and late Neoproterozoic-Cambrian times. In Western Dronning Maud Land, the high-grade Mesoproterozoic Maud Belt is juxtaposed against the Archaean Grunehogna Province and has traditionally been interpreted as a Grenvillian mobile belt that was thermally overprinted during the Early Palaeozoic. Integration of new U-Pb sensitive high-resolution ion microprobe and conventional single zircon and monazite age...

Fatty acid content of POM, sediment, foraminifer and peracarid samples obtained during POLARSTERN cruise ANT-XXIV/2 (PS71), supplement to: Würzberg, Laura; Peters, Janna; Brandt, Angelika (2011): Fatty acid patterns of Southern Ocean shelf and deep sea peracarid crustaceans and a possible food source, foraminiferans. Deep Sea Research Part II: Topical Studies in Oceanography, 58(19-20), 2027-2035

Laura Würzberg, Janna Peters & Angelika Brandt
In order to investigate the diversity of diet composition in macrobenthic peracarid crustaceans from the Antarctic shelf and deep sea, the fatty acid (FA) composition of different species belonging to the orders Isopoda, Amphipoda, Cumacea and Tanaidacea was analysed. Multivariate analyses of the FA composition confirmed general differences between the orders, but also distinct differences within these orders. To gain information on the origin of the FAs found, the potential food sources sediment, POM and...

Tide amplitude at Ilulissat, and surface height and flow velocities of Jakobshavn Isbrae in August 2004, supplement to: Dietrich, Reinhard; Maas, H-G; Baessler, M; Rülke, Axel; Richter, Astrid; Schwalbe, G; Westfeld, P (2007): Jakobshavn Isbræ, West Greenland: Flow velocities and tidal interaction of the front area from 2004 field observations. Journal of Geophysical Research, 112(F3)

Reinhard Dietrich, H-G Maas, M Baessler, Axel Rülke, Astrid Richter, G Schwalbe & P Westfeld
During the summer of 2004, the front area of the Jakobshavn Isbræ was monitored using a geodetic-photogrammetric survey with temporarily coincident precise observations of local ocean tides in the Disko Bay close to Ilulissat. The geodetic and photogrammetric observations were conducted at the southern margin of the glacier front. The largest observed horizontal flow velocities are in the central part of the front with values up to 45 m/d. This is a factor of 2...

Station characteristics and copepod fatty alcohol, fatty acid and lipid composition during MSM02/4 in Fram Strait, supplement to: Laakmann, Silke; Kochzius, Marc; Auel, Holger (2009): Ecological niches of Arctic deep-sea copepods: Vertical partitioning, dietary preferences and different trophic levels minimize inter-specific competition. Deep Sea Research Part I: Oceanographic Research Papers, 56(5), 741-756

Silke Laakmann, Marc Kochzius & Holger Auel
The biodiversity of pelagic deep-sea ecosystems has received growing scientific interest in the last decade, especially in the framework of international marine biodiversity initiatives, such as Census of Marine Life (CoML). While a growing number of deep-sea zooplankton species has been identified and genetically characterized, little information is available on the mechanisms minimizing inter-specific competition and thus allowing closely related species to co-occur in the deep-sea pelagic realm. Focussing on the two dominant calanoid copepod...

Radar profiles from South Shetland Islands/Western Antarctic Peninsula, supplement to: Lindhorst, Sebastian; Schutter, Ilona (2014): Polar gravel beach-ridge systems: Sedimentary architecture, genesis, and implications for climate reconstructions (South Shetland Islands/Western Antarctic Peninsula). Geomorphology, 221, 187-203

Sebastian Lindhorst & Ilona Schutter
The sedimentary architecture of polar gravel-beach ridges is presented and it is shown that ridge internal geometries reflect past wave-climate conditions. Ground-penetrating radar (GPR) data obtained along the coasts of Potter Peninsula (King George Island) show that beach ridges unconformably overlie the prograding strand plain. Development of individual ridges is seen to result from multiple storms in periods of increased storm-wave impact on the coast. Strand-plain progradation, by contrast, is the result of swash sedimentation...

Geochemistry, grain sizes and radiocarbon age of sediment core Lz1005 from Amery Oasis, East Antarctica, supplement to: Hultzsch, Nadja; Wagner, Bernd; Diekmann, Bernhard; White, Duanne A (2008): Mineralogical implications for the Late Pleistocene glaciation in Amery Oasis, East Antarctica, from a lake sediment core. Antarctic Science, 20(02), 169-172

Nadja Hultzsch, Bernd Wagner, Bernhard Diekmann & Duanne A White
The clay mineralogical composition of a 552 cm long sediment core from Lake Terrasovoje in Amery Oasis, East Antarctica, was analysed and compared with that in surface sediments from other locations in the vicinity. The lower part of the sediment core is formed by sub- and proglacial sediments with a dominance of smectite and illite, and lower amounts of kaolinite and chlorite. The upper part of the core is deposited after 12 500 cal yr...

Water chemistry and iron speciation in samples taken during SWEDARP 97/98 campaign with S.A. Agulhas to the Southern Ocean, supplement to: Croot, Peter L; Andersson, Karen; Öztürk, Murat; Turner, David R (2004): The distribution and speciation of iron along 6°E in the Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, 51(22-24), 2857-2879

Peter L Croot, Karen Andersson, Murat Öztürk & David R Turner
The distribution and speciation of iron was determined along a transect in the eastern Atlantic sector (6°E) of the Southern Ocean during a collaborative Scandinavian/South African Antarctic cruise conducted in late austral summer (December 1997/January 1998). Elevated concentrations of dissolved iron (>0.4 nM) were found at 60°S in the vicinity of the Spring Ice Edge (SIE) in tandem with a phytoplankton bloom, chiefly dominated by Phaeocystis sp. This bloom had developed rapidly after the loss...

Sample characteristics and pigment concentration of arctic snow and permafrost algal strains, supplement to: Leya, Thomas; Rahn, Andreas; Lütz, Cornelius; Ramias, Daniel (2009): Response of arctic snow and permafrost algae to high light and nitrogen stress by changes in pigment composition and applied aspects for biotechnology. FEMS Microbiology Ecology, 67(3), 432-443

Thomas Leya, Andreas Rahn, Cornelius Lütz & Daniel Ramias
Ten algal strains from snow and permafrost substrates were tested for their ability to produce secondary carotenoids and a-tocopherol in response to high light and decreased nitrogen levels. The Culture Collection of Cryophilic Algae at Fraunhofer IBMT in Potsdam served as the bioresource for this study. Eight of the strains belong to the Chlorophyceae and two strains are affiliated to the Trebouxiophyceae. While under low light, all 10 strains produced the normal spectrum of primary...

Surface characteristics and metazoa occurrence at ice station PS67/006-1 during POLARSTERN cruise ANT-XXII/2 (Nov 2004-Jan 2005), supplement to: Kiko, Rainer; Michels, Jan; Mizdalski, Elke; Schnack-Schiel, Sigrid B; Werner, Iris (2008): Living conditions, abundance and composition of the metazoan fauna in surface and sub-ice layers in pack ice of the western Weddell Sea during late spring. Deep Sea Research Part II: Topical Studies in Oceanography, 55(8-9), 1000-1014

Rainer Kiko, Jan Michels, Elke Mizdalski, Sigrid B Schnack-Schiel & Iris Werner
The surface and sub-ice layer habitats and their metazoan fauna were studied on a drifting pack-ice floe in the western Weddell Sea from 29 November 2004 to 1 January 2005 during the "Ice Station POLarstern" (ISPOL). Flooding of the floe occurred at some places, and the establishment of surface layers with a brownish colour due to growing algae was observed at several sampling sites. The average surface-layer temperature, brine salinity and brine volume were -1.4...

Clay mineral and heavy metal composition of sea-bed surface sediments and pre-Holocene sediment samples taken during POLARSTERN cruise ANT-XXIII/9, supplement to: Borchers, Andreas; Voigt, Ines; Kuhn, Gerhard; Diekmann, Bernhard (2011): Mineralogy of glaciomarine sediments from the Prydz Bay-Kerguelen region: relation to modern depositional environments. Antarctic Science, 23(2), 164-179

Andreas Borchers, Ines Voigt, Gerhard Kuhn & Bernhard Diekmann
Surface mineralogical compositions and their association to modern processes are well known from the east Atlantic and south-west Indian sectors of the Southern Ocean, but data from the interface of these areas - the Prydz Bay-Kerguelen region - is still missing. The objective of our study was to provide mineralogical data of reference samples from this region and to relate these mineralogical assemblages to hinterland geology, weathering, transport and depositional processes. Clay mineral assemblages were...

Water temperature, salinity, DOC content and THNS concentration in samples taken during POLARSTERN cruise to the Fram Strait and Greenland Sea, supplement to: Engbrodt, Ralph; Kattner, Gerhard (2005): On the biogeochemistry of dissolved carbohydrates in the Greenland Sea (Arctic). Organic Geochemistry, 36(6), 937-948

Ralph Engbrodt & Gerhard Kattner
Dissolved organic matter (DOM) was isolated with XAD-2 and 4 resins from different water masses of the Greenland Sea and Fram Strait. The contribution of XAD-extractable dissolved organic carbon (DOC), operationally defined as 'recalcitrant' or humic substances, to total DOC was in the range of 45 ± 9% in surface waters and 60 ± 6% in deep waters. The carbohydrate concentration and composition were determined using the l-tryptophan/sulfuric acid method (for the bulk carbohydrate concentration,...

Representative and whole rock analyses of rocks from Filchnerfjella, Antarctica, supplement to: Owada, Masaaki; Baba, Sotaro; Läufer, Andreas; Elvevold, Synnove; Shiraishi, Kazuyuki; Jacobs, Joachim (2003): Geology of Filchnerfjella in Dronning Maud Land: A preliminary report of Japan-Norway-Germany Joint Geological Investigation. Polar Geoscience, 16, 108-136

Masaaki Owada, Sotaro Baba, Andreas Läufer, Synnove Elvevold, Kazuyuki Shiraishi & Joachim Jacobs
The geological history of Filchnerfjella and surrounding areas (2°E to 8°E) in central Dronning Maud Land, East Antarctica, is constructed from metamorphic and igneous petrology, and structural investigations. The geology of Filchner-fjella consists mainly of metamorphic rocks accompanied by intrusive rocks. Two stages of metamorphism can be recognized in this area. The earlier stage metamorphism is defined as a porphyroblast stage (garnet, hornblende, and sillimanite stable), and the later one is recognized as a symplectic...

Fractional abundance and indices for brGDGTs and crenarchaeol in dust samples, surface water samples and surface sediment samples, supplement to: Weijers, Johan W H; Schefuß, Enno; Kim, Jung-Hyun; Sinninghe Damsté, Jaap S; Schouten, Stefan (2014): Constraints on the sources of branched tetraether membrane lipids in distal marine sediments. Organic Geochemistry, 72, 14-22

Johan W H Weijers, Enno Schefuß, Jung-Hyun Kim, Jaap S Sinninghe Damsté & Stefan Schouten
Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are membrane lipids produced by soil bacteria and occur in near coastal marine sediments as a result of soil organic matter input. Their abundance relative to marine-derived crenarchaeol, quantified in the BIT index, generally decreases offshore. However, in distal marine sediments, low relative amounts of brGDGTs can often still be observed. Sedimentary in situ production as well as dust input have been suggested as potential, though as yet not...

Artificial oxygen fluxes measured by the eddy correlation method using stirring-sensitive oxygen microsensor and oxygen optodes in a flume experiment, supplement to: Holtappels, Moritz; Noss, Christian; Hancke, Kasper; Cathalot, Cecile; McGinnis, Daniel F; Lorke, Andreas; Glud, Ronnie N (2015): Aquatic Eddy Correlation: Quantifying the Artificial Flux Caused by Stirring-Sensitive O2 Sensors. PLoS ONE, 10(1), e0116564

Moritz Holtappels, Christian Noss, Kasper Hancke, Cecile Cathalot, Daniel F McGinnis, Andreas Lorke & Ronnie N Glud
In the last decade, the aquatic eddy correlation (EC) technique has proven to be a powerful approach for non-invasive measurements of oxygen fluxes across the sediment water interface. Fundamental to the EC approach is the correlation of turbulent velocity and oxygen concentration fluctuations measured with high frequencies in the same sampling volume. Oxygen concentrations are commonly measured with fast responding electrochemical microsensors. However, due to their own oxygen consumption, electrochemical microsensors are sensitive to changes...

Ichthyolith (tooth and denticle) counts from DSDP 386, 596, ODP 886, 1262, IODP U1403, and Gubbio K/Pg boundary sections, supplement to: Sibert, Elizabeth C; Norris, Richard D (2015): New Age of Fishes initiated by the Cretaceous-Paleogene mass extinction. Proceedings of the National Academy of Sciences, 112(28), 8537-8542

Elizabeth C Sibert & Richard D Norris
Ray-finned fishes (Actinopterygii) comprise nearly half of all modern vertebrate diversity, and are an ecologically and numerically dominant megafauna in most aquatic environments. Crown teleost fishes diversified relatively recently, during the Late Cretaceous and early Paleogene, although the exact timing and cause of their radiation and rise to ecological dominance is poorly constrained. Here we use microfossil teeth and shark dermal scales (ichthyoliths) preserved in deep-sea sediments to study the changes in pelagic fish community...

Late Eocene-earliest Miocene Sr isotopic reference section of DSDP Site 73-522, supplement to: Reilly, Timothy J; Miller, Kenneth G; Feigenson, Mark D (2002): Latest Eocene-earliest Miocene Sr isotopic reference section, Site 522, eastern South Atlantic. Paleoceanography, 17(3), 18-1-18-9

Timothy J Reilly, Kenneth G Miller & Mark D Feigenson
We present a revised calibration of Sr isotopes to the geomagnetic polarity timescale (GPTS) using closely spaced (~0.15 m.y. resolution) samples from the classic uppermost Eocene through lowermost Miocene section at Site 522, eastern South Atlantic. The Sr isotopic data are fit with two linear segments with a sharp change in slope at circa 27.5 Ma from 0.000038/m.y. (27.5 to 34.4 Ma) to 0.000051/m.y. (23.8 to 27.5 Ma). Regression analysis indicates that stratigraphic resolution ranges...

Foraminiferal assemblage and statistical analysis of surface sediment samples from the Golfe d'Arguin, Mauritania, supplement to: Reymond, Claire E; Mateu-Vicens, G; Westphal, Hildegard (2014): Foraminiferal assemblages from a transitional tropical upwelling zone in the Golfe d'Arguin, Mauritania. Estuarine, Coastal and Shelf Science, 148, 70-84

Claire E Reymond, G Mateu-Vicens & Hildegard Westphal
With the growing pressure of eutrophication in tropical regions, the Mauritian shelf provides a natural situation to understand the variability in mesotrophic assemblages. Site-specific dynamics occur throughout the 1200 m depth gradient. The shallow assemblages divide into three types of warm-water mesotrophic foraminiferal assemblages, which is not only a consequence of high primary productivity restricting light to the benthos but due to low pore water oxygenation, shelf geomorphology, and sediment partitioning. In the intermediate depth...

Photosynthetic production in the Central Arctic during POLARSTERN cruise ARK-XXVII/3 (IceArc) in 2012, supplement to: Fernández-Méndez, Mar; Katlein, Christian; Rabe, Benjamin; Nicolaus, Marcel; Peeken, Ilka; Bakker, Karel; Flores, Hauke; Boetius, Antje (2015): Photosynthetic production in the central Arctic Ocean during the record sea-ice minimum in 2012. Biogeosciences, 12, 3525-3549

Mar Fernández-Méndez, Benjamin Rabe, Christian Katlein, Marcel Nicolaus, Ilka Peeken & Antje Boetius
The ice-covered Central Arctic Ocean is characterized by low primary productivity due to light and nutrient limitations. It has been speculated that the recent reduction in ice cover could lead to a substantial increase in primary production, but still little is known as to the fate of the ice-associated primary production, and of nutrient supply with increasing warming. This study presents results from the Central Arctic Ocean collected during summer 2012, when sea-ice reached a...

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