Search Results - "Etheridge, D. M."

Variations in global methane sources and sinks during 1910–2010 by Ghosh, A, Patra, P. K, Ishijima, K, Umezawa, T, Ito, A, Etheridge, D. M, Sugawara, S, Kawamura, K, Miller, J. B, Dlugokencky, E. J, Krummel, P. B, Fraser, P. J, Steele, L. P, Langenfelds, R. L, Trudinger, C. M, White, J. W. C, Vaughn, B, Saeki, T, Aoki, S, Nakazawa, T

“…Atmospheric methane (CH4) increased from ~900 ppb (parts per billion, or nanomoles per mole of dry air) in 1900 to ~1800 ppb in 2010 at a rate unprecedented in…”
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Trends and seasonal cycles in the isotopic composition of nitrous oxide since 1940 by Park, S., Croteau, P., Boering, K. A., Etheridge, D. M., Ferretti, D., Fraser, P. J., Kim, K-R., Krummel, P. B., Langenfelds, R. L., van Ommen, T. D., Steele, L. P., Trudinger, C. M.

“…The atmospheric nitrous oxide concentration has increased by 20% since 1750. Analyses of Antarctic firn and archived air samples reveal seasonal cycles in the…”
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Gas transport in firn: multiple-tracer characterisation and model intercomparison for NEEM, Northern Greenland by Buizert, C, Martinerie, P, Petrenko, V. V, Severinghaus, J. P, Trudinger, C. M, Witrant, E, Rosen, J. L, Orsi, A. J, Rubino, M, Etheridge, D. M, Steele, L. P, Hogan, C, Laube, J. C, Sturges, W. T, Levchenko, V. A, Smith, A. M, Levin, I, Conway, T. J, Dlugokencky, E. J, Lang, P. M, Kawamura, K, Jenk, T. M, White, J. W. C, Sowers, T, Schwander, J, Blunier, T

“…Air was sampled from the porous firn layer at the NEEM site in Northern Greenland. We use an ensemble of ten reference tracers of known atmospheric history to…”
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Unexpected Changes to the Global Methane Budget over the Past 2000 Years by Ferretti, D. F, Miller, J. B, White, J. W. C, Etheridge, D. M, Lassey, K. R, Lowe, D. C, Meure, C. M. MacFarling, Dreier, M. F, Trudinger, C. M, van Ommen, T. D, Langenfelds, R. L

“…We report a 2000-year Antarctic ice-core record of stable carbon isotope measurements in atmospheric methane ([delta]¹³CH₄). Large [delta]¹³CH₄ variations…”
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Low atmospheric CO2 levels during the Little Ice Age due to cooling-induced terrestrial uptake by Rubino, M., Etheridge, D. M., Trudinger, C. M., Allison, C. E., Rayner, P. J., Enting, I., Mulvaney, R., Steele, L. P., Langenfelds, R. L., Sturges, W. T., Curran, M. A. J., Smith, A. M.

“…Land carbon uptake reduced atmospheric CO 2 levels during the Little Ice Age. Numerical simulations of atmospheric carbonyl sulfide levels and ice-core carbon…”
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Atmospheric methane between 1000 A.D. and present: Evidence of anthropogenic emissions and climatic variability by Etheridge, D. M., Steele, L. P., Francey, R. J., Langenfelds, R. L.

“…Atmospheric methane mixing ratios from 1000 A.D. to present are measured in three Antarctic ice cores, two Greenland ice cores, the Antarctic firn layer, and…”
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Antarctic ice sheet discharge driven by atmosphere-ocean feedbacks at the Last Glacial Termination by Fogwill, C. J., Turney, C. S. M., Golledge, N. R., Etheridge, D. M., Rubino, M., Thornton, D. P., Baker, A., Woodward, J., Winter, K., van Ommen, T. D., Moy, A. D., Curran, M. A. J., Davies, S. M., Weber, M. E., Bird, M. I., Munksgaard, N. C., Menviel, L., Rootes, C. M., Ellis, B., Millman, H., Vohra, J., Rivera, A., Cooper, A.

“…Reconstructing the dynamic response of the Antarctic ice sheets to warming during the Last Glacial Termination (LGT; 18,000–11,650 yrs ago) allows us to…”
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How well do different tracers constrain the firn diffusivity profile? by Trudinger, C. M, Enting, I. G, Rayner, P. J, Etheridge, D. M, Buizert, C, Rubino, M, Krummel, P. B, Blunier, T

“…Firn air transport models are used to interpret measurements of the composition of air in firn and bubbles trapped in ice in order to reconstruct past…”
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A 60 yr record of atmospheric carbon monoxide reconstructed from Greenland firn air by Petrenko, V. V, Martinerie, P, Novelli, P, Etheridge, D. M, Levin, I, Wang, Z, Blunier, T, Chappellaz, J, Kaiser, J, Lang, P, Steele, L. P, Hammer, S, Mak, J, Langenfelds, R. L, Schwander, J, Severinghaus, J. P, Witrant, E, Petron, G, Battle, M. O, Forster, G, Sturges, W. T, Lamarque, J.-F, Steffen, K, White, J. W. C

“…We present the first reconstruction of the Northern Hemisphere (NH) high latitude atmospheric carbon monoxide (CO) mole fraction from Greenland firn air. Firn…”
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Centennial evolution of the atmospheric methane budget: what do the carbon isotopes tell us? by Lassey, K. R., Etheridge, D. M., Lowe, D. C., Smith, A. M., Ferretti, D. F.

“…Little is known about how the methane source inventory and sinks have evolved over recent centuries. New and detailed records of methane mixing ratio and…”
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Stable isotopes provide revised global limits of aerobic methane emissions from plants by Ferretti, D. F., Miller, J. B., White, J. W. C., Lassey, K. R., Lowe, D. C., Etheridge, D. M.

“…Recently Keppler et al. (2006) discovered a surprising new source of methane – terrestrial plants under aerobic conditions, with an estimated global production…”
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Atmospheric histories of halocarbons from analysis of Antarctic firn air: Methyl bromide, methyl chloride, chloroform, and dichloromethane by Trudinger, C. M., Etheridge, D. M., Sturrock, G. A., Fraser, P. J., Krummel, P. B., McCulloch, A.

“…We reconstruct atmospheric levels of methyl bromide (CH3Br), methyl chloride (CH3Cl), chloroform (CHCl3), and dichloromethane (CH2Cl2) back to before 1940…”
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Corrigendum to ``Gas transport in firn: multiple-tracer characterisation and model intercomparison for NEEM, Northern Greenland'' published in Atmos. Chem. Phys., 12, 4259–-4277, 2012 by Buizert, C, Martinerie, P, Petrenko, V. V, Severinghaus, J. P, Trudinger, C. M, Witrant, E, Rosen, J. L, Orsi, A. J, Rubino, M, Etheridge, D. M, Steele, L. P, Hogan, C, Laube, J. C, Sturges, W. T, Levchenko, V. A, Smith, A. M, Levin, I, Conway, T. J, Dlugokencky, E. J, Lang, P. M, Kawamura, K, Jenk, T. M, White, J. W. C, Sowers, T, Schwander, J, Blunier, T

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Atmospheric histories of halocarbons from analysis of Antarctic firn air: Major Montreal Protocol species by Sturrock, G. A., Etheridge, D. M., Trudinger, C. M., Fraser, P. J., Smith, A. M.

“…Air samples extracted from Antarctic firn at Law Dome have been analyzed for the suite of halocarbons that contribute most of the anthropogenic chlorine and…”
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Reconstructing atmospheric histories from measurements of air composition in firn by Trudinger, C. M., Etheridge, D. M., Rayner, P. J., Enting, I. G., Sturrock, G. A., Langenfelds, R. L.

“…This paper investigates the use of a numerical model of firn diffusion and bubble trapping in the reconstruction of atmospheric records from firn measurements…”
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Modeling air movement and bubble trapping in firn by Trudinger, C. M., Enting, I. G., Etheridge, D. M., Francey, R. J., Levchenko, V. A., Steele, L. P., Raynaud, D., Arnaud, L.

“…A finite difference model for gas diffusion and bubble trapping in firn is described. The model uses prescribed profiles of density, open and closed porosity,…”
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A new reconstruction of atmospheric gaseous elemental mercury trend over the last 60 years from Greenland firn records by Dommergue, A., Martinerie, P., Courteaud, J., Witrant, E., Etheridge, D.M.

“…This study presents measurements of gaseous elemental mercury (GEM) concentrations in the 80 m of firn air at the international drilling site of NEEM in…”
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A revised 1000 year atmospheric δ13C-CO2 record from Law Dome and South Pole, Antarctica by Rubino, M., Etheridge, D. M., Trudinger, C. M., Allison, C. E., Battle, M. O., Langenfelds, R. L., Steele, L. P., Curran, M., Bender, M., White, J. W. C., Jenk, T. M., Blunier, T., Francey, R. J.

“…We present new measurements of δ13C of CO2 extracted from a high‐resolution ice core from Law Dome (East Antarctica), together with firn measurements performed…”
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Evidence from Antarctic ice cores for recent increases in snow accumulation by Morgan, V. I, Goodwin, I. D, Etheridget, D. M, Wookey, C. W

“…Time series showing changes in the net rate of snow accumulation since 1806 along a 700-km segment of east Antarctica are presented. The accumulation record…”
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A perturbation analysis of the climate benefit from geosequestration of carbon dioxide by Enting, I.G., Etheridge, D.M., Fielding, M.J.

“…A simple climate model is used to calculate the benefit, over time, of geosequestration of CO 2 that would otherwise be released to the atmosphere. The…”
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