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A multimodel examination of climate extremes in an idealized geoengineering experiment

Curry, Charles L. ; Sillmann, Jana ; Bronaugh, David ; Alterskjaer, Kari ; Cole, Jason N. S. ; Ji, Duoying ; Kravitz, Ben ; Kristjánsson, Jón Egill ; Moore, John C. ; Muri, Helene ; Niemeier, Ulrike ; Robock, Alan ; Tilmes, Simone ; Yang, Shuting

Journal of geophysical research. Atmospheres, 2014-04, Vol.119 (7), p.3900-3923 [Periódico revisado por pares]

Washington: Blackwell Publishing Ltd

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  • Título:
    A multimodel examination of climate extremes in an idealized geoengineering experiment
  • Autor: Curry, Charles L. ; Sillmann, Jana ; Bronaugh, David ; Alterskjaer, Kari ; Cole, Jason N. S. ; Ji, Duoying ; Kravitz, Ben ; Kristjánsson, Jón Egill ; Moore, John C. ; Muri, Helene ; Niemeier, Ulrike ; Robock, Alan ; Tilmes, Simone ; Yang, Shuting
  • Assuntos: Carbon dioxide ; Climate ; climate extremes ; Geoengineering ; Geophysics ; Heating ; Land ; Oceans ; Precipitation ; Regional
  • É parte de: Journal of geophysical research. Atmospheres, 2014-04, Vol.119 (7), p.3900-3923
  • Notas: Canadian NSERC - No. 403886-10
    AERO-CLO-WV - No. (184714/S30)
    European Commission's 7th Framework Program - No. (FP7-ENV-2008-1-226567)
    istex:7DD9486663845289A830B8C540DAD5E554E3ABDD
    ReadmeFigure S1Figure S2Figure S3Figure S4Figure S5Figure S6Figure S7Figure S8Figure S9Figure S10Tables S1 and S2
    U.S. Department of Energy - No. DE-AC05-76RL01830
    ark:/67375/WNG-L3M2XXC7-4
    ArticleID:JGRD51265
    Norwegian Research Council - No. (207711/E10)
    NSF - No. AGS-1157525; No. CBET-1240507
    German Research Foundation - No. 1659/1-1
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    NFR/207711
  • Descrição: Temperature and precipitation extremes are examined in the Geoengineering Model Intercomparison Project experiment G1, wherein an instantaneous quadrupling of CO2 from its preindustrial control value is offset by a commensurate reduction in solar irradiance. Compared to the preindustrial climate, changes in climate extremes under G1 are generally much smaller than under 4 × CO2 alone. However, it is also the case that extremes of temperature and precipitation in G1 differ significantly from those under preindustrial conditions. Probability density functions of standardized anomalies of monthly surface temperature T and precipitation P in G1 exhibit an extension of the high‐T tail over land, of the low‐T tail over ocean, and a shift of P to drier conditions. Using daily model output, we analyzed the frequency of extreme events, such as the coldest night (TNn), warmest day (TXx), and maximum 5 day precipitation amount, and also duration indicators such as cold and warm spells and consecutive dry days. The strong heating at northern high latitudes simulated under 4 × CO2 is much alleviated in G1, but significant warming remains, particularly for TNn compared to TXx. Internal feedbacks lead to regional increases in absorbed solar radiation at the surface, increasing temperatures over Northern Hemisphere land in summer. Conversely, significant cooling occurs over the tropical oceans, increasing cold spell duration there. Globally, G1 is more effective in reducing changes in temperature extremes compared to precipitation extremes and for reducing changes in precipitation extremes versus means but somewhat less effective at reducing changes in temperature extremes compared to means. Key PointsThe G1 experiment features significant changes in climate extremesRapid climate responses in G1 lead to significant regional warming over landExtreme temperatures decrease and cold spells increase over oceans in G1
  • Editor: Washington: Blackwell Publishing Ltd
  • Idioma: Inglês;Norueguês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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