Articles | Volume 67, issue 1
Express report 31 Jan 2018
Express report | 31 Jan 2018
Middle to Late Holocene mobilization of DOC-bound Pb and Y in the Magellanic moorlands (53° S) as a function of sea spray fertilization, climate variations and volcanic fallout? A preliminary report
Björn Klaes et al.
No articles found.
Malte Ortner, Michael Seidel, Sebastian Semella, Thomas Udelhoven, Michael Vohland, and Sören Thiele-Bruhn
SOIL, 8, 113–131,Short summary
Soil organic carbon (SOC) and its labile fractions are influenced by soil use and mineral properties. These parameters interact with each other and affect SOC differently depending on local conditions. To investigate the latter, the dependence of SOC content on parameters that vary on a local scale depending on parent material, soil texture, and land use as well as parameter combinations was statistically assessed. Relevance and superiority of local models compared to total models were shown.
María H. Toyos, Gisela Winckler, Helge W. Arz, Lester Lembke-Jene, Carina B. Lange, Gerhard Kuhn, and Frank Lamy
Clim. Past, 18, 147–166,Short summary
Past export production in the southeast Pacific and its link to Patagonian ice dynamics is unknown. We reconstruct biological productivity changes at the Pacific entrance to the Drake Passage, covering the past 400 000 years. We show that glacial–interglacial variability in export production responds to glaciogenic Fe supply from Patagonia and silica availability due to shifts in oceanic fronts, whereas dust, as a source of lithogenic material, plays a minor role.
Jérôme Kaiser, Norbert Wasmund, Mati Kahru, Anna K. Wittenborn, Regina Hansen, Katharina Häusler, Matthias Moros, Detlef Schulz-Bull, and Helge W. Arz
Biogeosciences, 17, 2579–2591,Short summary
Cyanobacterial blooms represent a threat to the Baltic Sea ecosystem, causing deoxygenation of the bottom water. In order to understand the natural versus anthropogenic factors driving these blooms, it is necessary to study long-term trends beyond observations. We have produced a record of cyanobacterial blooms since 1860 using organic molecules (biomarkers) preserved in sediments. Cyanobacterial blooms in the Baltic Sea are likely mainly related to temperature variability.
Sören Thiele-Bruhn, Michael Schloter, Berndt-Michael Wilke, Lee A. Beaudette, Fabrice Martin-Laurent, Nathalie Cheviron, Christian Mougin, and Jörg Römbke
SOIL, 6, 17–34,Short summary
Soil quality depends on the functioning of soil microbiota. Only a few standardized methods are available to assess this as well as adverse effects of human activities. So we need to identify promising additional methods that target soil microbial function. Discussed are (i) molecular methods using qPCR for new endpoints, e.g. in N and P cycling and greenhouse gas emissions, (ii) techniques for fungal enzyme activities, and (iii) field methods on carbon turnover such as the litter bag test.
Claire Waelbroeck, Sylvain Pichat, Evelyn Böhm, Bryan C. Lougheed, Davide Faranda, Mathieu Vrac, Lise Missiaen, Natalia Vazquez Riveiros, Pierre Burckel, Jörg Lippold, Helge W. Arz, Trond Dokken, François Thil, and Arnaud Dapoigny
Clim. Past, 14, 1315–1330,Short summary
Recording the precise timing and sequence of events is essential for understanding rapid climate changes and improving climate model predictive skills. Here, we precisely assess the relative timing between ocean and atmospheric changes, both recorded in the same deep-sea core over the last 45 kyr. We show that decreased mid-depth water mass transport in the western equatorial Atlantic preceded increased rainfall over the adjacent continent by 120 to 980 yr, depending on the type of climate event.
Sami A. Jokinen, Joonas J. Virtasalo, Tom Jilbert, Jérôme Kaiser, Olaf Dellwig, Helge W. Arz, Jari Hänninen, Laura Arppe, Miia Collander, and Timo Saarinen
Biogeosciences, 15, 3975–4001,Short summary
Oxygen deficiency is a major environmental problem deteriorating seafloor habitats especially in the coastal ocean with large human impact. Here we apply a wide set of chemical and physical analyses to a 1500-year long sediment record and show that, although long-term climate variability has modulated seafloor oxygenation in the coastal northern Baltic Sea, the oxygen loss over the 20th century is unprecedentedly severe, emphasizing the need to reduce anthropogenic nutrient input in the future.
Marina Díaz-Michelena, Rolf Kilian, Ruy Sanz, Francisco Rios, and Oscar Baeza
Geosci. Instrum. Method. Data Syst., 5, 127–142,Short summary
The present manuscript is written as the result of an exhaustive field work with MOURA instrument on relevant sites on Earth. MOURA magnetometer was developed for Mars MetNet precursor mission to Mars. In this work we have demonstrated the capabilities of the instrument in terrestrial analogues of Mars, which cover a huge variability range in the magnetic anomalies intensities. Apart from its suitability for prospections, we insist on its advanced performance regarding paleomagnetic information.
H. Kuehn, L. Lembke-Jene, R. Gersonde, O. Esper, F. Lamy, H. Arz, G. Kuhn, and R. Tiedemann
Clim. Past, 10, 2215–2236,Short summary
Annually laminated sediments from the NE Bering Sea reveal a decadal-scale correlation to Greenland ice core records during termination I, suggesting an atmospheric teleconnection. Lamination occurrence is tightly coupled to Bølling-Allerød and Preboreal warm phases. Increases in export production, closely coupled to SST and sea ice changes, are hypothesized to be a main cause of deglacial anoxia, rather than changes in overturning/ventilation rates of mid-depth waters entering the Bering Sea.
L. S. Shumilovskikh, D. Fleitmann, N. R. Nowaczyk, H. Behling, F. Marret, A. Wegwerth, and H. W. Arz
Clim. Past, 10, 939–954,
Birkel, C., Broder, T., and Biester, H.: Nonlinear and threshold-dominated runoff generation controls DOC export in a small peat catchment, J. Geophys. Res.-Biogeo., 122, 498–513, https://doi.org/10.1002/2016JG003621, 2017.
Broder, T., Blodau, C., Biester, H., and Knorr, K. H.: Sea spray, trace elements, and decomposition patterns as possible constraints on the evolution of CH4 and CO2 concentrations and isotopic signatures in oceanic ombrotrophic bogs, Biogeochemistry, 122, 327–342, https://doi.org/10.1007/s10533-014-0044-5, 2015.
Casanova, M., Salazar, O., Seguel, O., and Luzio, W.: The Soils of Chile, Springer World Soils Book Series, Dordrecht, the Netherlands, https://doi.org/10.1007/978-94-007-5949-7, 2013.
FAO: World reference base for soil resources 2014: International classification system for naming soils and creating legends for soil maps, World Soil Resources Reports, 106, Rome, Italy, 2015.
Fröhlich, C.: Evidence of a long-term trend in total solar irradiance, Astron. Astrophys., 501, L28–L30, https://doi.org/10.1051/0004-6361/200912318, 2009.
Hartland, A., Fairchild, I. J., Lead, J. R., Borsato, A., Baker, A., Frisia, S., and Baalousha, M.: From soil to cave: Transport of trace metals by natural organic matter in karst dripwaters, Chem. Geol., 304–305, 68–82, https://doi.org/10.1016/j.chemgeo.2012.01.032, 2012.
Hughes, P. D. M., Mallon, G., Brown, A., Essex, H. J., Stanford, J. D., and Hotes, S.: The impact of high tephra loading on late-Holocene carbon accumulation and vegetation succession in peatland ecosystems, Quaternary Sci. Rev., 67, 160–175, https://doi.org/10.1016/j.quascirev.2013.01.015, 2013.
Kilian, R. and Lamy, F.: A review of Glacial and Holocene paleoclimate records from southernmost Patagonia 1 (49-55∘ S), Quaternary Sci. Rev., 53, 1–23, https://doi.org/10.1016/j.quascirev.2012.07.017, 2012.
Kilian, R., Biester, H., Behrmann, J., Baeza, O., Fesq-Martin, M., Hohner, M., Schimpf, D., Friedmann, A., and Mangini, A.: Millennial-scale volcanic impact on a superhumid and pristine ecosystem, Geology, 34, 609–612, https://doi.org/10.1130/G22605.1, 2006.
Kilian, R., Lamy, F., and Arz, H.: Late Quaternary variations of the southern westerly wind belt and its influences on glacier extend, denudation as well as terrestrial and aquatic ecosystems within the southernmost Andes, German Journal of Geosciences, 164, 279–294, https://doi.org/10.1127/1860-1804/2013/0027, 2013.
Lamy, F., Kilian, R., Arz, H., Francois, J., Kaiser, J., Prange, M., and Steinke, T.: Holocene changes in the position and intensity of the southern westerly wind belt, Nat. Geosci., 3, 695–699, https://doi.org/10.1038/NGEO959, 2010.
Li, Z., Liang, D., Peng, Q., Cui, Z., Huang, J., and Lin, Z.: Interaction between selenium and soil organic matter and its impact on soil selenium bioavailability: A review, Geoderma, 295, 69–79, https://doi.org/10.1016/j.geoderma.2017.02.019, 2017.
Miriyala, P., Sukumaran, N. P., Nagender Nath, B., Ramamurty, P. B., Sijinkumar, A. V., Vijayagopal, B., Ramaswamy, V., and Sebastian, T.: Increased chemical weathering during the deglacial to mid-Holocene summer monsoon intensification, Nature Scientific Reports, 7, 44310, https://doi.org/10.1038/srep44310, 2017.
Ríos, F., Kilian, R., and Mutschke, E.: Chlorophyll-α thin layers in the Magellan fjord system: The role of the water column stratification, Cont. Shelf Res., 124, 1–12, https://doi.org/10.1016/j.csr.2016.04.011, 2016.
Schimpf, D., Kilian, R., Kronz, A., Simon, K., Spötl, C., Wörner, G., Deininger, M., and Mangini, A.: The significance of chemical, isotopic, and detrital components in three coeval stalagmites from the superhumid southernmost Andes (53∘ S) as high-resolution palaeo-climate proxies, Quaternary Sci. Rev., 30, 443–459, https://doi.org/10.1016/j.quascirev.2010.12.006, 2011.
Smith, R. W., Bianchi, T. S., Allison, M., Savage, C., and Galy, V.: High rates of organic carbon burial in fjord sediments globally, Nat. Geosci., 8, 450–454, https://doi.org/10.1038/ngeo2421, 2015.
Vermeire, M.-L., Cornu, S., Fekiacova, Z., Detienne, M., Delvaux, B., and Cornélis, J.-T.: Rare earth dynamics along pedogenesis in a chronosequence of podzolic soils, Chem. Geol., 446, 163–174, https://doi.org/10.1016/j.chemgeo.2016.06.008, 2016.
Wen, H. and Carignan, J.: Ocean to continent transfer of atmospheric Se as revealed by epiphytic lichens, Environ. Pollut., 157, 2790–2797, https://doi.org/10.1016/j.envpol.2009.04.021, 2009.
Whittle, A. and Gallego-Sala, A. V.: Vulnerability of the peatland carbon sink to sea level rise, Sci. Rep., 6, 28758, https://doi.org/10.1038/srep28758, 2016.