C., Desplanque C., Michalet R., Schweingruber F.H. (2000). Extreme tree
rings in Spruce (Picea abies (L.) Karst.) and Fir (Abies alba Mill.)
stands in relation to climate, site, and space in the Southern French and
Italian Alps. Arctic, Antartic and Alpine Research, 32(1), 1-13.
- TITLE Extreme Tree
Rings in Spruce (Picea abies (L.) Karst.) and Fir (Abies alba Mill.)
Stands in Relation to Climate, Site, and Space in the Southern French and
- TITRE (French) Cernes
de croissance extrêmes chez l'Epicéa commun (Picea abies (L.)
Karst.) et le Sapin pectiné (Abies alba Mill.) en relation avec le
climat, le site et la région, dans les Alpes du Sud Françaises et les
- LANGUAGE English, with English abstract.
- SPECIES Picea abies [(L.)
Karst.], Abies alba Mill.
- SITES Tarentaise, Maurienne, Briançonnais
regions, in France; Susa valley in Italy. Whole France (RENECOFOR)
- ABSTRACT (English)
The similarity over long distances of dendroecological pointer years (with
extreme ring-widths) were studied at both regional and country scales in order
to investigate the geographical extension of climate influences on tree-rings.
Two common species, Norway Spruce (Picea abies Karst.) and white Fir (Abies
alba Mill.) were compared. The regional study was carried out on 33
popluations located in four alpine valleys along a climatic gradient of summer
aridity (Tarentaise, Maurienne and Briançonnais, in France, and Susa valley
in Italy). For most of species and regions, several negative ring-width
pointer years with abrupt growth reductions such as 1976, 1922, 1986, and 1944
were common (listed in order of decreasing importance). However, Spruce growth
was more reducted in 1948 than that of Fir. At the country scale, some of the
strongest positive (e.g., 1932, 1964, 1969) and negative (e.g., 1956, 1962,
1976, 1986) pointer years extended over the whole of France, whereas the
geographic variability was explainable by the autoecology of species. At both
studied scales, evident climatic interpretations such as severe winter frosts,
unusual summer droughts, or excessive wet and cold springs can explain most of
the negative pointer years. Conversely, most positive growth responses are
caused by a local combination of favorable climatic factors rather than simple
extreme events, and therefore are less efficient for wood dating.