The role of forcing and internal dynamics in explaining the 'Medieval Climate Anomaly'
| Autor: | Elisabeth Crespin, Michael E. Mann, Marie-France Loutre, Y. Sallaz-Damaz, Svetlana Dubinkina, Hugues Goosse, Drew Shindell, Hans Renssen |
|---|---|
| Přispěvatelé: | Earth and Climate, Amsterdam Global Change Institute |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
010506 paleontology
Atmospheric Science 010504 meteorology & atmospheric sciences Global temperature Global warming Climate change Radiative forcing Atmospheric temperature 01 natural sciences Arctic oscillation 13. Climate action Climatology Paleoclimatology SDG 13 - Climate Action Climate model SDG 14 - Life Below Water 0105 earth and related environmental sciences |
| Zdroj: | Goosse, H, Crespin, E, Dubinkina, S, Loutre, M F, Mann, M E, Renssen, H, Sallaz-Damaz, Y & Shindell, D 2012, ' The role of forcing and internal dynamics in explaining the "Medieval Climate Anomaly" ', Climate Dynamics, vol. 39, no. 12, pp. 2847-2866 . https://doi.org/10.1007/s00382-012-1297-0 Climate Dynamics, 39(12), 2847-2866. Springer Berlin / Heidelberg |
| ISSN: | 0930-7575 |
| DOI: | 10.1007/s00382-012-1297-0 |
| Popis: | Proxy reconstructions suggest that peak global temperature during the past warm interval known as the Medieval Climate Anomaly (MCA, roughly 950-1250 AD) has been exceeded only during the most recent decades. To better understand the origin of this warm period, we use model simulations constrained by data assimilation establishing the spatial pattern of temperature changes that is most consistent with forcing estimates, model physics and the empirical information contained in paleoclimate proxy records. These numerical experiments demonstrate that the reconstructed spatial temperature pattern of the MCA can be explained by a simple thermodynamical response of the climate system to relatively weak changes in radiative forcing combined with a modification of the atmospheric circulation, displaying some similarities with the positive phase of the so-called Arctic Oscillation, and with northward shifts in the position of the Gulf Stream and Kuroshio currents. The mechanisms underlying the MCA are thus quite different from anthropogenic mechanisms responsible for modern global warming. © 2012 Springer-Verlag. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|