Search Results - "Hajdas, I"

A versatile gas interface for routine radiocarbon analysis with a gas ion source by Wacker, L., Fahrni, S.M., Hajdas, I., Molnar, M., Synal, H.-A., Szidat, S., Zhang, Y.L.

“…In 2010 more than 600 radiocarbon samples were measured with the gas ion source at the MIni CArbon DAting System (MICADAS) at ETH Zurich and the number of…”
Get full text

The Awakening of the Dormant Mount Vettore Fault (2016 Central Italy Earthquake, Mw 6.6): Paleoseismic Clues on Its Millennial Silences by Galli, P., Galderisi, A., Peronace, E., Giaccio, B., Hajdas, I., Messina, P., Pileggi, D., Polpetta, F.

“…The Mount Vettore normal fault ruptured between August and October 2016, sourcing three earthquakes of Mw 6.2, 6.1, and 6.6. The first one caused the death of…”
Get full text

A field guide to mortar sampling for radiocarbon dating by Daugbjerg, T. S., Lindroos, A., Heinemeier, J., Ringbom, Å., Barrett, G., Michalska, D., Hajdas, I., Raja, R., Olsen, J.

“…Radiocarbon dating of mortars is a method for absolute dating of historical mortared stone structures. Successful mortar dating studies have answered…”
Get full text

The Biogeochemical Legacy of Arctic Subglacial Sediments Exposed by Glacier Retreat by Vinšová, P., Kohler, T. J., Simpson, M. J., Hajdas, I., Yde, J. C., Falteisek, L., Žárský, J. D., Yuan, T., Tejnecký, V., Mercl, F., Hood, E., Stibal, M.

“…During past periods of advance, Arctic glaciers and ice sheets overrode soil, sediments, and vegetation and buried significant stores of organic matter (OM);…”
Get full text

A novel approach to process carbonate samples for radiocarbon measurements with helium carrier gas by Wacker, L., Fülöp, R.-H., Hajdas, I., Molnár, M., Rethemeyer, J.

“…Most laboratories prepare carbonates samples for radiocarbon analysis by acid decomposition in evacuated glass tubes and subsequent reduction of the evolved…”
Get full text

Persistent Solar Influence on North Atlantic Climate during the Holocene by Bond, Gerard, Kromer, Bernd, Beer, Juerg, Muscheler, Raimund, Evans, Michael N., Showers, William, Hoffmann, Sharon, Lotti-Bond, Rusty, Hajdas, Irka, Bonani, Georges

“…Surface winds and surface ocean hydrography in the subpolar North Atlantic appear to have been influenced by variations in solar output through the entire…”
Get full text

The potential of accelerator-based techniques as an analytical tool for forensics: The case of coffee by Chytry, P., Souza, G.M.S., Debastiani, R., dos Santos, C.E.I., Antoine, J.M.R., Banas, A., Banas, K., Calcagnile, L., Chiari, M., Hajdas, I., Molnar, M., Pelicon, P., Pessoa Barradas, N., Quarta, G., Romolo, F.S., Simon, A., Dias, J.F.

“…We discuss how different accelerator-based techniques can be employed synergistically as a powerful analytical tool for forensic studies of foodstuff…”
Get full text

Last Glacial pollen–climate reconstructions from Northland, New Zealand by Newnham, R.M., Alloway, B. V., Holt, K.A., Butler, K., Rees, A.B.H., Wilmshurst, J.M., Dunbar, G., Hajdas, I.

“…ABSTRACT Despite wide‐ranging interest in the vegetation and climate of Northland, New Zealand, during the last glacial cycle, the region and timeframe lack…”
Get full text

Constant denudation rates in a high alpine catchment for the last 6 kyrs by Grischott, R., Kober, F., Lupker, M., Hippe, K., Ivy‐Ochs, S., Hajdas, I., Salcher, B., Christl, M.

“…Terrestrial cosmogenic nuclides (TCN) have widely been used as proxies in determining denudation rates in catchments. Most studies were limited to samples from…”
Get full text

Radiocarbon deglaciation chronology of the Thunder Bay, Ontario area and implications for ice sheet retreat patterns by Lowell, Thomas V., Fisher, Timothy G., Hajdas, I., Glover, K., Loope, H., Henry, T.

“…The sensitivity of ice sheets to climate change influences the return of meltwater to the oceans. Here we track the Laurentide Ice Sheet along a ∼400 km long…”
Get full text

Evolution of carbon fluxes during initial soil formation along the forefield of Damma glacier, Switzerland by Guelland, K., Hagedorn, F., Smittenberg, R. H., Göransson, H., Bernasconi, S. M., Hajdas, I., Kretzschmar, R.

“…Soil carbon (C) fluxes, soil respiration and dissolved organic carbon (DOC) leaching were explored along the young Damma glacier forefield chronosequence…”
Get full text

Radiocarbon ( 14C)-deduced biogenic and anthropogenic contributions to organic carbon (OC) of urban aerosols from Zürich, Switzerland by Szidat, S, Jenk, T.M, Gäggeler, H.W, Synal, H.-A, Fisseha, R, Baltensperger, U, Kalberer, M, Samburova, V, Reimann, S, Kasper-Giebl, A, Hajdas, I

“…Measurements of the fraction of contemporary carbon ( f C) in organic carbon (OC) of ambient aerosols are presented using radiocarbon ( 14C). This value…”
Get full text

Soil acidity affects fine root turnover of European beech by Richter, A. K, Hajdas, I, Frossard, E, Brunner, I

“…The impact of soil chemical parameters (pH and base saturation) and soil depth on fine root dynamics in six acidic European beech (Fagus sylvatica L.) stands…”
Get full text

Status report on sample preparation facilities for 14C analysis at the new CologneAMS center by Rethemeyer, J., Fülöp, R.-H., Höfle, S., Wacker, L., Heinze, S., Hajdas, I., Patt, U., König, S., Stapper, B., Dewald, A.

“…The new AMS facility at the University of Cologne (CologneAMS), Germany, was established in 2010 with the delivery of the HVE 6MV Tandetron AMS, which will be…”
Get full text

THEODORE, a two-step heating system for the EC/OC determination of radiocarbon (14C) in the environment by Szidat, S., Jenk, T.M., Gäggeler, H.W., Synal, H.-A., Hajdas, I., Bonani, G., Saurer, M.

“…Measurements of 14C in the organic carbon (OC) and elemental carbon (EC) fractions, respectively, of fine aerosol particles bear the potential to apportion…”
Get full text

Geochemical evidence for high-resolution variations during deposition of the Holocene S1 sapropel on the Cretan Ridge, Eastern Mediterranean by Gennari, G., Tamburini, F., Ariztegui, D., Hajdas, I., Spezzaferri, S.

“…Major and minor element distributions and solid phase phosphorus contents were measured in a sediment core from the Cretan Ridge that contains the Holocene S1…”
Get full text

40Ar/ 39Ar and 14C geochronology of the Albano maar deposits: Implications for defining the age and eruptive style of the most recent explosive activity at Colli Albani Volcanic District, Central Italy by Giaccio, B., Marra, F., Hajdas, I., Karner, D.B., Renne, P.R., Sposato, A.

“…New 40Ar/ 39Ar and 14C ages have been found for the Albano multiple maar pyroclastic units and underlying paleosols to document the most recent explosive…”
Get full text

Direct measurements of small 14C samples after oxidation in quartz tubes by Fahrni, S.M., Gäggeler, H.W., Hajdas, I., Ruff, M., Szidat, S., Wacker, L.

“…Small 14C samples gain importance in environmental research and for dating purposes. However, throughput of such samples is limited by the preparation of…”
Get full text

Radiocarbon and absolute chronology of the Late-Glacial record from Hauterive/Rouges-Terres, Lake Neuchâtel (CH) by Hajdas, I, Bonani, G, Hadorn, P, Thew, N, Coope, G.R, Lemdahl, G

“…Radiocarbon ages of 87 samples made up of terrestrial macrofossils (mainly twigs of Salix sp.) were washed out from sediments sampled at…”
Get full text

Coral provides way to age deep water by Mangini, A, Lomitschka, M, Eichstädter, R, Frank, N, Vogler, S, Bonani, G, Hajdas, I, Patzold, J

“…We propose a new method for computing the ratio of the isotopes carbon-14 to carbon-12 in deep water from the past, and for testing the results derived from…”
Get full text