Search Results - "Delmas, R J"

Loss of volatile acid species from upper firn layers at Vostok, Antarctica by Wagnon, P., Delmas, R. J., Legrand, M.

“…Significant natural artifacts in ice chemical records have been pointed out in recent preliminary glaciochemical studies carried out in central Antarctic areas…”
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East Antarctic ice core sulfur isotope measurements over a complete glacial-interglacial cycle by Alexander, B., Thiemens, M. H., Farquhar, J., Kaufman, A. J., Savarino, J., Delmas, R. J.

“…Both sulfur and oxygen isotopes of sulfate preserved in ice cores from Greenland and Antarctica have provided information on the relative sources of sulfate in…”
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Climate driven changes in the oxidation pathways of atmospheric sulfur by Alexander, B., Savarino, J., Barkov, N. I., Delmas, R. J., Thiemens, M. H.

“…Ice cores have provided a wealth of information about past atmospheric composition and climate variability. However, relatively little is known about how the…”
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Comment on “Dust provenance in Antarctic ice during glacial periods: From where in southern South America?” by D. M. Gaiero by Delmonte, B., Delmas, R. J., Petit, J.-R.

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Isotopic signatures of sulfur in shallow Antarctic ice cores by Patris, Nicolas, Delmas, Robert J., Jouzel, Jean

“…Sulfur stable isotopes from Antarctic snow samples have been used to assess sources of sulfate. The novel experimental procedure presented here is suitable for…”
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The Ice Record of Greenhouse Gases by Raynaud, D., Jouzel, J., Barnola, J. M., Chappellaz, J., Delmas, R. J., Lorius, C.

“…Gases trapped in polar ice provide our most direct record of the changes in greenhouse gas levels during the past 150,000 years. The best documented trace-gas…”
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Trace elements in South America aerosol during 20th century inferred from a Nevado Illimani ice core, Eastern Bolivian Andes (6350 m asl) by Correia, A., Freydier, R., Delmas, R. J., Simões, J. C., Taupin, J.-D., Dupré, B., Artaxo, P.

“…A 137 m ice core drilled in 1999 from Eastern Bolivian Andes at the summit of Nevado Illimani (16º 37' S, 67º 46' W, 6350 m asl) was analyzed at high temporal…”
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A 220-year continuous record of volcanic H2SO4 in the Antarctic ice sheet by LEGRAND, M, DELMAS, R. J

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Volcanic eruptions recorded in the Illimani ice core (Bolivia): 1918–1998 and Tambora periods by De Angelis, M., Simões, J., Bonnaveira, H., Taupin, J.-D., Delmas, R. J.

“…Acid layers of volcanic origin detected in polar snow and ice layers are commonly used to document past volcanic activity on a global scale or, conversely, to…”
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Seasonal fluxes of major ions to a high altitude cold alpine glacier by Maupetit, F., Wagenbach, D., Weddeling, P., Delmas, R.J.

“…A 13 m fimcore was recovered in April 1991 at Col du Dome (4250 m.a.s.l.), located below the Mont Blanc summit (Northern French Alps). The core spans a…”
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Decrease in anthropogenic lead, cadmium and zinc in Greenland snows since the late 1960s by Boutron, Claude F, Görlach, Ursula, Candelone, Jean-Pierre, Bolshov, Michael A, Delmas, Robert J

“…As a result of environmental policy initiatives, lead concentrations in Greenland snow have decreased by a factor of 7.5 over a 20-year period. Over the same…”
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A two hundred years record of atmospheric cadmium, copper and zinc concentrations in high altitude snow and ice from the French-Italian Alps by Van de Velde, Katja, Boutron, Claude F., Ferrari, Christophe P., Moreau, Ann-Laure, Delmas, Robert J., Barbante, Carlo, Bellomi, Tania, Capodaglio, Gabriele, Cescon, Paolo

“…Cd, Cu and Zn have been measured using ultraclean procedures in snow and ice deposited at a high altitude location in the French/Italian Alps during the past…”
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Bacterial diversity of autotrophic enriched cultures from remote, glacial Antarctic, Alpine and Andean aerosol, snow and soil samples by González-Toril, E., Amils, R., Delmas, R. J., Petit, J.-R., Komárek, J., Elster, J.

“…Four different communities and one culture of autotrophic microbial assemblages were obtained by incubation of samples collected from high elevation snow in…”
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Climate forcing implications from Vostok ice-core sulphate data by Legrand, M. R, Delmas, R. J, Charlson, R. J

“…The hypothesis that the number concentration of cloud condensation nuclei influences marine stratus cloud albedo, and hence global climate, is examined using…”
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Free tropospheric reservoir of natural sulfate by DELMAS, R. J

“…super(1) super(0) Be is used as a spike of the natural background atmospheric aerosol to calculate the global flux of sulfur (F sub(s) ) into the free…”
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First sulfur isotope measurements in central Greenland ice cores along the preindustrial and industrial periods by Patris, Nicolas, Delmas, Robert, Legrand, Michel, De Angelis, Martine, Ferron, Francisco A., Stiévenard, Michel, Jouzel, Jean

“…Sulfur isotopes of sulfate have been measured in a discontinuous set of polar ice core samples from Summit, central Greenland, covering the preindustrial (from…”
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Climate instability during the last interglacial period recorded in the GRIP ice core by Anklin, M, Barnola, J M, Beer, J, Blunier, T, Chappellaz, J, Clausen, H B, Dahl-Jensen, D, Dansgaard, W, De Angelis, M

“…Isotope and chemical analyses of the ice-core at the Greenland Ice-core Project (GRIP) have revealed that the climate during the last interglacial period was…”
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Snow chemistry measurements on James Ross Island (Antarctic Peninsula) showing sea-salt aerosol modifications by Aristarain, Alberto J., Delmas, Robert J.

“…The fractionation of atmospheric sea-salt has been investigated by glaciochemical analysis of the sea-salt deposited on the snow covering the small ice cap of…”
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Ice record of a large eruption of Deception Island Volcano (Antarctica) in the XVIITH century by Aristarain, Alberto J., Delmas, Robert J.

“…A well-marked volcanic ash layer was found at 145.9 m depth in a 154.3 m ice core recovered in 1981 on James Ross Island, Antarctic Peninsula. Ash composition…”
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Ice-core records of global climate and environment changes by DELMAS, R. J

“…Precipitation accumulating on the Greenland and Antarctic ice sheets records several key parameters (temperature, accumulation, composition of atmospheric…”
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