Chuine et al. 2004/2005, Burgundy Pinot Noir grape harvest dates and Dijon April-August temperature reconstruction, 1370-2003 (NOAA Paleoclimatology)
How it connects
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Beech seed crops at Seesen (Harz, Germany), scored every year 1685-1875: Picardy sweat years follow a big crop only weakly, and just as much precede one