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Charcoal records of two sediment cores off SW Africa (2012)

Daniau, Anne-Laure ; Bartlein, Patrick J ; Harrison, S P ; [weitere]

PANGAEA

In: Supplement to: Daniau, Anne-Laure; Bartlein, Patrick J; Harrison, S P; Prentice, Iain Colin; Brewer, Simon; Friedlingstein, Pierre; Harrison-Prentice, T I; Inoue, J; Izumi, K; Marlon, Jennifer R; Mooney, Scott D; Power, Mitchell J; Stevenson, J; Tinner, Willy; Andric, M; Atanassova, J; Behling, Hermann; Black, M; Blarquez, O; Brown, K J; Carcaillet, C; Colhoun, Eric A; Colombaroli, Daniele; Davis, Basil A S; D'Costa, D; Dodson, John; Dupont, Lydie M; Eshetu, Z; Gavin, D G; Genries, A; Haberle, Simon G; Hallett, D J; Hope, Geoffrey; Horn, S P; Kassa, T G; Katamura, F; Kennedy, L M; Kershaw, A Peter; Krivonogov, S; Long, C; Magri, Donatella; Marinova, E; McKenzie, G Merna; Moreno, P I; Moss, Patrick T; Neumann, F H; Norstrom, E; Paitre, C; Rius, D; Roberts, Neil; Robinson, G S; Sasaki, N; Scott, Louis; Takahara, H; Terwilliger, V; Thevenon, Florian; Turner, R; Valsecchi, V G; Vannière, Boris; Walsh, M; Williams, N; Zhang, Yancheng (2012): Predictability of biomass burning in response to climate changes. Global Biogeochemical Cycles, 26(4), https://doi.org/10.1029/2011GB004249

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Publikationsdatum: 2024-05-27

Beschreibung: We analyze sedimentary charcoal records to show that the changes in fire regime over the past 21,000 yrs are predictable from changes in regional climates. Analyses of paleo- fire data show that fire increases monotonically with changes in temperature and peaks at intermediate moisture levels, and that temperature is quantitatively the most important driver of changes in biomass burning over the past 21,000 yrs. Given that a similar relationship between climate drivers and fire emerges from analyses of the interannual variability in biomass burning shown by remote-sensing observations of month-by-month burnt area between 1996 and 2008, our results signal a serious cause for concern in the face of continuing global warming.

Schlagwort(e): Center for Marine Environmental Sciences; MARUM

Materialart: Dataset

Format: application/zip, 2 datasets

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Cryogenic thermonuclear fuel implosions on the National Ignition Facility (2012)

Glenzer, S. H. ; Callahan, D. A. ; MacKinnon, A. J. ; [weitere]

American Institute of Physics

In: Physics of Plasmas. 2012; 19(5): 056318. Published 2012 May 01. doi: 10.1063/1.4719686.

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Publikationsdatum: 2012-05-01

Print ISSN: 1070-664X

Digitale ISSN: 1089-7674

Thema: Physik

Publiziert von American Institute of Physics

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Digitale Medien

Experiments utilizing ion cyclotron range of frequencies heating on the TFTR tokamak (1991)

Wilson, J. R. ; Hosea, J. C. ; Bell, M. G. ; [weitere]

New York, NY : American Institute of Physics (AIP)

Physics of Fluids 3 (1991), S. 2270-2276

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ISSN: 1089-7666

Quelle: AIP Digital Archive

Thema: Physik

Notizen: A variety of experiments have been performed on the TFTR tokamak [Wilson et al., Plasma Physics and Controlled Nuclear Fusion Research 1988 (IAEA, Vienna, 1989), Vol. 1, p. 691] utilizing ion cyclotron range of frequencies (ICRF) heating. Of special interest has been the insight into plasma performance gained by utilizing a different heating scheme other than the usual neutral beam injection (NBI). Utilizing ICRF heating allows control over the power deposition profile independent of the plasma fueling profile. In addition, by varying the minority concentration the power split between ion and electron heating can be varied. Confinement has been examined in high recycling gas fueled discharges, low recycling supershot plasmas, and peaked density pellet fueled discharges. Global confinement is found not to be affected by the method or localization of plasma heating, but the calculated local diffusivities vary with the power deposition profile to yield similar global values. In addition, sawtooth stabilization observed with ICRF heating has been investigated and found to occur in qualitative agreement with theory. ICRF sawtooth stabilized discharges exhibit peaked temperature and density profiles and have a safety factor q that appears to fall well below unity on axis.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.859646

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High‐beta operation and magnetohydrodynamic activity on the TFTR tokamak (1990)

McGuire, K. ; Arunasalam, V. ; Barnes, C. W. ; [weitere]

American Institute of Physics

In: Physics of Fluids B: Plasma Physics. 1990; 2(6): 1287-1290. Published 1990 Jun 01. doi: 10.1063/1.859544.

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Publikationsdatum: 1990-06-01

Print ISSN: 0899-8221

Thema: Physik

Publiziert von American Institute of Physics

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Shock timing experiments on the National Ignition Facility: Initial results and comparison with simulation (2012)

Robey, H. F. ; Boehly, T. R. ; Celliers, P. M. ; [weitere]

American Institute of Physics

In: Physics of Plasmas. 2012; 19(4): 042706. Published 2012 Apr 01. doi: 10.1063/1.3694122.

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Publikationsdatum: 2012-04-01

Print ISSN: 1070-664X

Digitale ISSN: 1089-7674

Thema: Physik

Publiziert von American Institute of Physics

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Correlations of heat and momentum transport in the TFTR tokamak (1990)

Scott, S. D. ; Arunasalam, V. ; Barnes, C. W. ; [weitere]

American Institute of Physics

In: Physics of Fluids B: Plasma Physics. 1990; 2(6): 1300-1305. Published 1990 Jun 01. doi: 10.1063/1.859545.

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Publikationsdatum: 1990-06-01

Print ISSN: 0899-8221

Thema: Physik

Publiziert von American Institute of Physics

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A high-resolution integrated model of the National Ignition Campaign cryogenic layered experiments (2012)

Jones, O. S. ; Cerjan, C. J. ; Marinak, M. M. ; [weitere]

American Institute of Physics

In: Physics of Plasmas. 2012; 19(5): 056315. Published 2012 May 01. doi: 10.1063/1.4718595.

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Publikationsdatum: 2012-05-01

Print ISSN: 1070-664X

Digitale ISSN: 1089-7674

Thema: Physik

Publiziert von American Institute of Physics

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High‐Qplasmas in the TFTR tokamak (1991)

Jassby, D. L. ; Barnes, C. W. ; Bell, M. G. ; [weitere]

American Institute of Physics

In: Physics of Fluids B: Plasma Physics. 1991; 3(8): 2308-2314. Published 1991 Aug 01. doi: 10.1063/1.859988.

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Publikationsdatum: 1991-08-01

Print ISSN: 0899-8221

Thema: Physik

Publiziert von American Institute of Physics

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Observation of manganese deposits on the East Pacific Rise during the CYAMEX-RITA expedition (1981)

Cyamex Scientific Team ; Francheteau, Jean ; Needham, H D ; [weitere]

PANGAEA

In: Supplement to: Cyamex Scientific Team; Francheteau, Jean; Needham, H D; Choukroune, P; Juteau, Thierry; Séguret, Marie J M; Ballard, R D; Fox, P J; Normark, William R; Carranza, A; Cordoba, D; Guerrero, Gerardo; Rangin, Claude (1981): First manned submersible dives on the East Pacific Rise at 21�N (project RITA): General results. Marine Geophysical Research, 4(4), 345-379, https://doi.org/10.1007/BF00286034

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Publikationsdatum: 2023-08-28

Beschreibung: A submersible study has been conducted in February - March 1978 at the axis of the East Pacific Rise near 21°N. The expedition CYAMEX, the first submersible program to be conducted on the East Pacific Rise, is part of the French-American-Mexican project RITA (Rivera - Tamayo), a 3-year study devoted to detailed geological and geophysical investigations of the East Pacific Rise Crest. On the basis of the 15 dives made by CYANA in the axial area of the Rise, a morphological and tectonic zonation can be established for this moderately-fast spreading center. A narrow, 0.6 to 1.2 km wide zone of extrusion (zone 1), dominated by young lava flows, is flanked by a highly fissured and faulted zone of extension (zone 2) with a width of 1 to 2 km. Further out, zone 3 is dominated by outward tilted blocks bounded by inward-facing fault scarps. Active or recent faults extend up to 12 km from the axis of extrusion of the East Pacific Rise. This represents the first determination from direct field evidence of the width of active tectonism associated with an accreting plate boundary. Massive sulfide deposits, made principally of zinc, copper and iron, were found close to the axis of the Rise. Other signs of the intense hydrothermal activity included the discovery of benthic fauna of giant size similar to that found at the axis of the Galapagos Rift. We emphasize the cyclic character of the volcanicity. The main characteristics of the geology of this segment of the East Pacific Rise can be explained by the thermal structure at depth below this moderately-fast spreading center. The geological observations are compatible with the existence of a shallow magma reservoir centered at the axis of the Rise with a half-width of the order of 10 km.

Schlagwort(e): CY78-16DF; CY78-17V; CY78-18V; CYAMEX; Cyana (Submersible); Deposit type; DEPTH, sediment/rock; Description; East Pacific Rise; Event label; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; OBSE; Observation; Position; Quantity of deposit; Sediment sample; Sediment type; SES; Substrate type; Visual description

Materialart: Dataset

Format: text/tab-separated-values, 21 data points

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