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Träfflista för sökning "WFRF:(Teubner T.) srt2:(2005-2009)"

Sökning: WFRF:(Teubner T.) > (2005-2009)

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1.
  • Collins, J, et al. (författare)
  • Unintegrated parton density functions
  • 2005
  • Ingår i: CERN Reports. - 0007-8328. ; CERN-2005-014, s. 256-273
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • An overview on activities to determine unintegrated parton density functions is given and the concept and need for unintegrated PDFs is discussed. It is also argued that it is important to reformulate perturbative QCD results in terms of fully unintegrated parton densities, differential in all components of the parton momentum. Also the need for non-linear BFKL evolution is discussed and results using the BK equation supplemented by DGLAP corrections at short distances is reviewed. Finally the use unintegrated generalized parton distributions for hard diffractive processes is discussed.
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2.
  • Dokulil, Martin T., et al. (författare)
  • Twenty years of spatially coherent deepwater warming in lakes across Europe related to the North Atlantic Oscillation
  • 2006
  • Ingår i: Limnology and Oceanography. - 0024-3590 .- 1939-5590. ; 51:6, s. 2787-2793
  • Tidskriftsartikel (refereegranskat)abstract
    • Twenty to fifty years of annual mean deepwater (hypolimnetic) temperature data from twelve deep lakes spaced across Europe (2 degrees 95'W to 14 degrees 0'E, 46 degrees 27' to 59 degrees 00'N) show a high degree of coherence among lakes, particularly within geographic regions. Hypolimnetic temperatures vary between years but increased consistently in all lakes by about 0.1 - 0.2 degrees C per decade. The observed increase was related to the weather generated by large-scale climatic processes over the Atlantic. To be effective, the climatic signal from the North Atlantic Oscillation (NAO) must affect deep lakes in spring before the onset of thermal stratification. The most consistent predictor of hypolimnetic temperature is the mean NAO index for January-May (NAO(J-M)), which explains 22-63% of the interannual variation in deepwater temperature in 10 of the 12 lakes. The two exceptions are remote, less wind-exposed alpine valley lakes. In four of the deepest lakes, the climate signal fades with depth. The projected hypolimnetic temperature increase of approximately 1 degrees C in 100 yr, obtained using a conservative approach, seems small. Effects on mixing conditions, thermal stability, or the replenishment of oxygen to deep waters result in accumulation of nutrients, which in turn will affect the trophic status and the food web.
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