Sentence examples for a negative pointer from inspiring English sources

Consistent pointer years throughout all chronologies included 1986 and 2008 as positive pointer years and 1987 as a negative pointer year Fig. 4.

Irrespective whether trees were tapped or not, a strong negative pointer year was found at Kratzeburg in 1996, and at Gollin in 1992.

At Kratzeburg, cold winter conditions in combination with a dry summer were suggested as possible cause for the negative pointer year in 1996 (Additional file 1: Figure S1), whereas drought is considered the main factor responsible for the growth depression observed at Gollin in 1992 (Additional file 1: Figure S2).

Although we did not test for significance due to a few observations of pointer years, we found seasonal analysis of pointer years showing negative pointer years were more often associated with dry conditions both in the previous and current year.

Only one negative pointer year was detected in the period after resin extraction per studied forest.

Positive pointer and negative pointer years are shown as circles and crosses respectively Fig. 6 Selected Siberian larch and white birch pointer years.

Based on our threshold, we identified six positive and six negative pointer years and compared these with pointer years of young and old birch trees (Gradel et al. 2017).

Black bars indicate a correlation coefficient >0.2 and the asterisk indicates significance with p<0.05 Fig. 4 Positive and negative pointer years from 1962 to 2009 for Siberian larch and young and old birch in Altansumber Fig. 5 Seasonal pointer years for the Siberian larch detrended chronology.

Conversely, 1969 and 1996 were identified as negative pointer years showing below average monthly total precipitation during the previous and current year vegetative period (previous June-September or July-August and current March-July or April-August) (Fig. 6).

Negative pointer years, which refer to years with remarkable growth depressions at the stand level (Schweingruber et al. 1990), were identified using the pointRes-package (van der Maaten-Theunissen et al. 2015).

Based on the selected positive versus negative pointer year comparative diagrams, 1986 and 2008 were identified as positive pointer years, showing above average monthly total precipitation during the previous and current year vegetative period (previous July-September and current May-June or May-July) (Fig. 6).