Growing degree days
Sum of degree days of TG over 4 Celsius (the daily mean temperature is less than 4 celsius, it is set equal to 4 celsius)
gd4(data, data_names = NULL, time.scale = YEAR, na.rm = FALSE)
data |
daily mean temperature, Celsius |
data_names |
names of each period of time |
time.scale |
month, season or year |
na.rm |
logical. Should missing values (including NaN) be removed? |
temperature, Celsius
McMaster, G. S., & Wilhelm, W. W. (1997). Growing degree-days: One equation, two interpretations. Agricultural and Forest Meteorology, 87(4), 291-300
data(data_all) gd4(data=data_all$tg)
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