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. 2021 May 28;2:677159. doi: 10.3389/falgy.2021.677159

Table 5.

Correlation coefficients between temperature and start dates of the pollen season.

Jan Mar DecJan JanFeb JanMar JanApr JanMay JanJun FebMar FebApr FebMay FebJun MarApr MarMay MarJun AprMay AprJun
Alnus −0.534 −0.518 −0.720
Corylus −0.703 −0.658 −0.664
TaxCupr −0.610 −0.591 −0.762 −0.749
Fraxinus −0.820 −0.705 −0.787
Betula −0.838 −0.691 −0.766
Carpinus −0.646 −0.574 −0.666
Platanus −0.645 −0.604 −0.576 −0.661 −0.662
Fagus −0.685 −0.629 −0.667 −0.637
Quercus −0.683 −0.646 −0.572 −0.717 −0.815
Pinus −0.661 −0.729 −0.685 −0.753 −0.801 −0.811 −0.816 −0.724
Poaceae −0.579 −0.621 −0.538 −0.610 −0.596 −0.566 −0.548
Urticaceae −0.516 −0.538 −0.551 −0.552

The highest correlations with mean temperature of the monthly periods are shown. Correlation coefficients for all pollen season definitions were averaged. Correlations above |0.5| are significant with p < 0.001. Months without highly significant correlations are not listed (e.g., February).