The medieval climate anomaly in Europe : Comparison of the summer and annual mean signals in two reconstructions and in simulations with data assimilation
Global and Planetary Change , Volume 84-85 p. 35- 47
The spatial pattern and potential dynamical origin of the Medieval Climate Anomaly (MCA, around 1000 AD) in Europe are assessed with two recent reconstructions and simulations constrained to follow those reconstructions by means of paleoclimate data assimilation. The simulations employ a climate model of intermediate complexity (LOVECLIM). The data assimilation technique is based on a particle ﬁlter using an ensemble of 96 simulations. The peak winter (and annual mean) warming during the MCA, in our analyses, is found to be strongest at high latitudes, associated with strengthened mid-latitude westerlies. Summer warmth, by contrast, is found to be greatest in southern Europe and the Mediterranean Sea, associated with reduced westerlies and strengthened southerly winds off North Africa. The results of our analysis thus underscore the complexity of the spatial and seasonal structure of the MCA in Europe.
|Publisher||Elsevier BV ((Netherlands) Amsterdam)|
|Journal||Global and Planetary Change|
Goosse, H, Guiot, J, Mann, M.E, Dubinkina, S, & Sallaz-Damaz, Y. (2012). The medieval climate anomaly in Europe : Comparison of the summer and annual mean signals in two reconstructions and in simulations with data assimilation. Global and Planetary Change, 84-85, 35–47.