UNEP Aridity Index
P/Eto
uai(eto, pr, data_names = NULL, time.scale = YEAR, na.rm = FALSE)
eto |
evapotranspiration, mm |
pr |
daily precipitation, mm |
data_names |
names of each period of time |
time.scale |
month, season or year |
na.rm |
logical. Should missing values (including NaN) be removed? |
index value
Huiping Huang, Yuping Han, Mingming Cao, Jinxi Song, and Heng Xiao Spatial-Temporal Variation of Aridity Index of China during 1960–2013. Advances in Meteorology, vol. 2016, Article ID 1536135, 10 pages, 2016. doi: 10.1155/2016/1536135
data(data_all) uai(eto = data_all$eto, pr = data_all$rr)
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