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Table 3 Bioclimatic parameters (abbreviations) and their definitionsa

From: Dendroclimatic analysis of white pine (Pinus strobus L.) using long-term provenance test sites across eastern North America

Bioclimatic parameter Definition
1. Annual mean temperature (AMT) The mean of all monthly mean temperatures.
2. Mean diurnal range (MDR) The mean of all monthly diurnal temperature ranges which is the difference between the monthly maximum and minimum temperature.
3. Isothermality (ISO) MDR (parameter 2) divided by ATR (parameter 7)
4. Temperature seasonality (TSCV) Coefficient of variation of temperature expressed as a percentage.
5. Max temperature of warmest period (TWP) The highest monthly temperature.
6. Min temperature of coldest period (TCP) The lowest monthly temperature.
7. Temperature annual range (TAR) The difference between the TWP (parameter 5) and the TCP (parameter 6).
8. Mean temperature of wettest quarter (TWetQ) Mean temperature of the wettest quarter.
9. Mean temperature of driest quarter (TDQ) Mean temperature of the driest quarter.
10. Mean temperature of warmest quarter (TWarmQ) Mean temperature of the warmest quarter.
11. Mean temperature of coldest quarter (TCQ) Mean temperature of the coldest quarter.
12. Annual precipitation (AP) The sum of monthly precipitation within a year.
13. Precipitation of wettest period (PWP) The highest monthly precipitation.
14. Precipitation of driest period (PDP) The lowest monthly precipitation.
15. Precipitation seasonality (PSCV) Coefficient of variation of precipitation monthly precipitation expressed a percentage.
16. Precipitation of wettest quarter (PWetQ) Total precipitation of the wettest quarter.
17. Precipitation of driest quarter (PDQ) Total precipitation of the driest quarter.
18. Precipitation of warmest quarter (PWarmQ) Total precipitation of the warmest quarter.
19. Precipitation of coldest quarter (PCQ) Total precipitation of the coldest quarter.
  1. aBioclimatic variables and definitions based on Natural Resources Canada (2017)