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. 2014 Jul 2;9(7):e101302. doi: 10.1371/journal.pone.0101302

Table 1. Biologically relevant variables considered in the analyses of climate change exposure of US national parks.

Code Name
Bio1 Annual mean temperature
Bio2 Mean diurnal range (mean of monthly (max temp – min temp))
Bio3 Isothermality (Bio2/Bio7)
Bio4 Temperature seasonality (standard deviation)
Bio5 Maximum temperature of the warmest month
Bio6 Minimum temperature of the coldest month
Bio7 Temperature annual range (Bio5– Bio6)
Bio8 Mean temperature of the wettest quarter
Bio9 Mean temperature of the driest quarter
Bio10 Mean temperature of the warmest quarter
Bio11 Mean temperature of the coldest quarter
Bio12 Annual precipitation
Bio13 Precipitation of the wettest month
Bio14 Precipitation of the driest month
Bio15 Precipitation seasonality (coefficient of variation)
Bio16 Precipitation of the wettest quarter
Bio17 Precipitation of the driest quarter
Bio18 Precipitation of the warmest quarter
Bio19 Precipitation of the coldest quarter
Cld1 Mean annual percentage cloud cover
Cld4 Cloud seasonality (standard deviation)
Vap18 Vapor pressure of the warmest quarter
Wet12 Annual number of wet days
Wet18 Number of wet days of the warmest quarter
Frs12 Annual number frost days