海拔數(shù)據(jù)下載
http://edcintl.cr.usgs.gov/downloads/sciweb1/shared/topo/downloads/GMTED/Grid_ZipFiles/mn30_grd.zip
CHELSA提供的19個(gè)Bioclimate 數(shù)據(jù)下載
https://www.wsl.ch/lud/chelsa/data/bioclim/integer/
各環(huán)境變量
Bio1 = Annual Mean Temperature 年均溫?
Bio2 = Mean Diurnal Range猜惋，即 Mean of monthly (max temp - min temp) 平均月溫差?
Bio3 = Isothermality 等溫性
Bio4 = Temperature Seasonality 溫度的季節(jié)性?
Bio5 = Max Temperature of Warmest Month 最暖月最高溫?
Bio6 = Min Temperature of Coldest Month 最冷月最低溫?
Bio7 = Temperature Annual Range 氣溫年較差?
Bio8 = Mean Temperature of Wettest Quarter 最濕季均溫
Bio9 = Mean Temperature of Driest Quarter 最干季均溫?
Bio10 = Mean Temperature of Warmest Quarter 最暖月均溫?
Bio11 = Mean Temperature of Coldest Quarter 最冷月均溫?
Bio12 = Annual Precipitation 年降水?
Bio13 = Precipitation of Wettest Month 最濕潤(rùn)月降水?
Bio14 = Precipitation of Driest Month 最干旱月降水?
Bio15 = Precipitation Seasonality 氣溫的季節(jié)性?
Bio16 = Precipitation of Wettest Quarter 最濕潤(rùn)季降水?
Bio17 = Precipitation of Driest Quarter 最干旱季降水?
Bio18 = Precipitation of Warmest Quarter 最暖季降水?
Bio19 = Precipitation of Coldest Quarter 最冷季降水
CHELSA氣候圖層朴皆， 選擇整數(shù)還是浮點(diǎn)數(shù)圖層辱士？
可選擇整數(shù)圖層 integer 瞳别，這是因?yàn)檎麛?shù)圖層占用空間較小， 同時(shí)也有相對(duì)較高的精度津函， 如溫度可精確到0.1度。 注意，這里的溫度是*10的值赖淤， 也就說，某地年均溫為15.2度谅河， 則提取出的數(shù)值為152咱旱。
