Coordinate Systems ------------------ X,Y: Projection: Lambert_Azimuthal_Equal_Area False_Easting: 0.0 False_Northing: 0.0 Central_Meridian: -100.0 Latitude_Of_Origin: 45.0 Linear Unit: Meter Geographic Coordinate System: GCS_WGS_1984 Datum: D_WGS_1984 ELEV: Elevation in meters above sea level Source: GMTED2010 data at 15 arc-second resolution. Danielson, J.J., and Gesch, D.B., 2011, Global multi-resolution terrain elevation data 2010 (GMTED2010): USGS Open-File Report 2011–1073. https://www.usgs.gov/centers/eros/science/usgs-eros-archive-digital-elevation-global-multi-resolution-terrain-elevation Climate Variables (see also http://climatena.ca and https://bit.ly/2RU6kOH (pdf manual) for more information) ----------------- Monthly variables: Tmin: minimum temperature for a given month (°C) Tmax: maximum temperature for a given month (°C) Tave: mean temperature for a given month (°C) Ppt: total precipitation for a given month (mm) Bioclimatic variables: MAT: mean annual temperature (°C) MWMT: mean temperature of the warmest month (°C) MCMT: mean temperature of the coldest month (°C) TD: difference between MCMT and MWMT, as a measure of continentality (°C) MAP: mean annual precipitation (mm) MSP: mean summer (May to Sep) precipitation (mm) AHM: annual heat moisture index, calculated as (MAT+10)/(MAP/1000) SHM: summer heat moisture index, calculated as MWMT/(MSP/1000) DD_0: degree-days below 0°C (chilling degree days) DD5: degree-days above 5°C (growing degree days) DD_18: degree-days below 18°C DD18: degree-days above 18°C NFFD: the number of frost-free days FFP: frost-free period bFFP: the julian date on which the frost-free period begins eFFP: the julian date on which the frost-free period ends PAS: precipitation as snow (mm) EMT: extreme minimum temperature over 30 years EXT: extreme maximum temperature over 30 years Eref: Hargreave's reference evaporation CMD: Hargreave's climatic moisture index MAR: mean annual solar radiation (MJ m-2 d-1) (excludes areas south of US and some high-latitude areas) RH: mean annual relative humidity (%) CMI: Hogg’s climate moisture index (mm) DD1040: (10