Počet záznamů: 1  

Tree-Ring Amplification of the Early Nineteenth-Century Summer Cooling in Central Europe(a)

  1. 1.
    0473326 - ÚVGZ 2017 RIV US eng J - Článek v odborném periodiku
    Büntgen, Ulf - Trnka, Miroslav - Krusic, P. J. - Kyncl, T. - Luterbacher, J. - Zorita, E. - Ljungqvist, F. C. - Auer, I. - Konter, O. - Schneider, L. - Tegel, W. - Štěpánek, Petr - Broennimann, S. - Hellmann, L. - Nievergelt, D. - Esper, J. … celkem 17 autorů
    Tree-Ring Amplification of the Early Nineteenth-Century Summer Cooling in Central Europe(a).
    Journal of Climate. Roč. 28, č. 13 (2015), s. 5272-5288. ISSN 0894-8755. E-ISSN 1520-0442
    Grant CEP: GA ČR GA13-04291S
    Institucionální podpora: RVO:67179843
    Klíčová slova: explosive volcanic-eruptions * climate forcing reconstructions * mount-pinatubo eruption * last millennium * north-atlantic * time-series * instrumental measurements * temperature variability * model simulations * solar irradiance
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 4.850, rok: 2015

    Annually resolved and absolutely dated tree-ring chronologies are the most important proxy archives to reconstruct climate variability over centuries to millennia. However, the suitability of tree-ring chronologies to reflect the "true" spectral properties of past changes in temperature and hydroclimate has recently been debated. At issue is the accurate quantification of temperature differences between early nineteenth-century cooling and recent warming. In this regard, central Europe (CEU) offers the unique opportunity to compare evidence from instrumental measurements, paleomodel simulations, and proxy reconstructions covering both the exceptionally hot summer of 2003 and the year without summer in 1816. This study uses 565 Swiss stone pine (Pinus cembra) ring width samples from high-elevation sites in the Slovakian Tatra Mountains and Austrian Alps to reconstruct CEU summer temperatures over the past three centuries. This new temperature history is compared to different sets of instrumental measurements and state-of-the-art climate model simulations. All records independently reveal the coolest conditions in the 1810s and warmest after 1996, but the ring width-based reconstruction overestimates the intensity and duration of the early nineteenth-century summer cooling by approximately 1.5 degrees C at decadal scales. This proxy-specific deviation is most likely triggered by inflated biological memory in response to reduced warm season temperature, together with changes in radiation and precipitation following the Tambora eruption in April 1815. While suggesting there exists a specific limitation in ring width chronologies to capture abrupt climate perturbations with increased climate system inertia, the results underline the importance of alternative dendrochronological and wood anatomical parameters, including stable isotopes and maximum density, to assess the frequency and severity of climatic extremes.
    Trvalý link: http://hdl.handle.net/11104/0270474

     
     
Počet záznamů: 1  

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