Fetches links to CHELSA climate data files from a specified base URL, filters them to include only links for *.tif files for variables available under current and future climate scenarios, and extracts metadata to create a tibble with detailed file information.
Value
A tibble with the following columns:
url(character): Full URL of the data file.relative_url(character): Relative URL, excluding the base URL.file_name(character): Name of the data file.dir_name(character): Directory path of the file.climate_scenario(character): Climate scenario. Values are: "current", "ssp126", "ssp370", and "ssp585".climate_model(character): Climate model. Values are: "Current", "GFDL-ESM4", "IPSL-CM6A-LR", "MPI-ESM1-2-HR", "MRI-ESM2-0", and "UKESM1-0-LL".year(character): Year range. Values are "1981-2010", "2011-2040", "2041-2070", and "2071-2100".var_name(character): Variable name, e.g., "bio1".long_name(character): Full variable name, e.g., "mean annual air temperature".unit(character): Measurement unit, e.g., "°C".scale(numeric): Scale factor for the variable.offset(numeric): Offset value for the variable.explanation(character): Brief description of the variable.
Examples
library(tibble)
library(dplyr)
library(ecokit)
options(pillar.print_max = 64)
CHELSA_links <- ecokit::get_chelsa_links()
dplyr::glimpse(CHELSA_links)
#> Rows: 2,116
#> Columns: 13
#> $ url <chr> "https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/clim…
#> $ relative_url <chr> "GLOBAL/climatologies/1981-2010/bio/CHELSA_bio1_1981-…
#> $ file_name <chr> "CHELSA_bio1_1981-2010_V.2.1.tif", "CHELSA_bio2_1981-…
#> $ dir_name <chr> "GLOBAL/climatologies/1981-2010/bio", "GLOBAL/climato…
#> $ climate_scenario <chr> "current", "current", "current", "current", "current"…
#> $ climate_model <chr> "current", "current", "current", "current", "current"…
#> $ year <chr> "1981-2010", "1981-2010", "1981-2010", "1981-2010", "…
#> $ var_name <chr> "bio1", "bio2", "bio3", "bio4", "bio5", "bio6", "bio7…
#> $ long_name <chr> "mean annual air temperature", "mean diurnal air temp…
#> $ unit <chr> "°C", "°C", "°C", "°C/100", "°C", "°C", "°C", "°C", "…
#> $ scale <dbl> 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1, 0.1…
#> $ offset <dbl> -273.15, 0.00, 0.00, 0.00, -273.15, -273.15, 0.00, -2…
#> $ explanation <chr> "mean annual daily mean air temperatures averaged ove…
# Count the number of files per climate scenario, model, and year
dplyr::count(CHELSA_links, climate_scenario, climate_model, year)
#> # A tibble: 46 × 4
#> climate_scenario climate_model year n
#> <chr> <chr> <chr> <int>
#> 1 current current 1981-2010 46
#> 2 ssp126 GFDL-ESM4 2011-2040 46
#> 3 ssp126 GFDL-ESM4 2041-2070 46
#> 4 ssp126 GFDL-ESM4 2071-2100 46
#> 5 ssp126 IPSL-CM6A-LR 2011-2040 46
#> 6 ssp126 IPSL-CM6A-LR 2041-2070 46
#> 7 ssp126 IPSL-CM6A-LR 2071-2100 46
#> 8 ssp126 MPI-ESM1-2-HR 2011-2040 46
#> 9 ssp126 MPI-ESM1-2-HR 2041-2070 46
#> 10 ssp126 MPI-ESM1-2-HR 2071-2100 46
#> 11 ssp126 MRI-ESM2-0 2011-2040 46
#> 12 ssp126 MRI-ESM2-0 2041-2070 46
#> 13 ssp126 MRI-ESM2-0 2071-2100 46
#> 14 ssp126 UKESM1-0-LL 2011-2040 46
#> 15 ssp126 UKESM1-0-LL 2041-2070 46
#> 16 ssp126 UKESM1-0-LL 2071-2100 46
#> 17 ssp370 GFDL-ESM4 2011-2040 46
#> 18 ssp370 GFDL-ESM4 2041-2070 46
#> 19 ssp370 GFDL-ESM4 2071-2100 46
#> 20 ssp370 IPSL-CM6A-LR 2011-2040 46
#> 21 ssp370 IPSL-CM6A-LR 2041-2070 46
#> 22 ssp370 IPSL-CM6A-LR 2071-2100 46
#> 23 ssp370 MPI-ESM1-2-HR 2011-2040 46
#> 24 ssp370 MPI-ESM1-2-HR 2041-2070 46
#> 25 ssp370 MPI-ESM1-2-HR 2071-2100 46
#> 26 ssp370 MRI-ESM2-0 2011-2040 46
#> 27 ssp370 MRI-ESM2-0 2041-2070 46
#> 28 ssp370 MRI-ESM2-0 2071-2100 46
#> 29 ssp370 UKESM1-0-LL 2011-2040 46
#> 30 ssp370 UKESM1-0-LL 2041-2070 46
#> 31 ssp370 UKESM1-0-LL 2071-2100 46
#> 32 ssp585 GFDL-ESM4 2011-2040 46
#> 33 ssp585 GFDL-ESM4 2041-2070 46
#> 34 ssp585 GFDL-ESM4 2071-2100 46
#> 35 ssp585 IPSL-CM6A-LR 2011-2040 46
#> 36 ssp585 IPSL-CM6A-LR 2041-2070 46
#> 37 ssp585 IPSL-CM6A-LR 2071-2100 46
#> 38 ssp585 MPI-ESM1-2-HR 2011-2040 46
#> 39 ssp585 MPI-ESM1-2-HR 2041-2070 46
#> 40 ssp585 MPI-ESM1-2-HR 2071-2100 46
#> 41 ssp585 MRI-ESM2-0 2011-2040 46
#> 42 ssp585 MRI-ESM2-0 2041-2070 46
#> 43 ssp585 MRI-ESM2-0 2071-2100 46
#> 44 ssp585 UKESM1-0-LL 2011-2040 46
#> 45 ssp585 UKESM1-0-LL 2041-2070 46
#> 46 ssp585 UKESM1-0-LL 2071-2100 46
CHELSA_links %>%
dplyr::count(var_name, long_name, unit, scale, offset, explanation)
#> # A tibble: 46 × 7
#> var_name long_name unit scale offset explanation n
#> <chr> <chr> <chr> <dbl> <dbl> <chr> <int>
#> 1 bio1 mean annual air temperature °C 0.1 -273. "mean annu… 46
#> 2 bio10 mean daily mean air temperatur… °C 0.1 -273. "The warme… 46
#> 3 bio11 mean daily mean air temperatur… °C 0.1 -273. "The colde… 46
#> 4 bio12 annual precipitation amount kg m… 0.1 0 "Accumulat… 46
#> 5 bio13 precipitation amount of the we… kg m… 0.1 0 "The preci… 46
#> 6 bio14 precipitation amount of the dr… kg m… 0.1 0 "The preci… 46
#> 7 bio15 precipitation seasonality kg m… 0.1 0 "The Coeff… 46
#> 8 bio16 mean monthly precipitation amo… kg m… 0.1 0 "The wette… 46
#> 9 bio17 mean monthly precipitation amo… kg m… 0.1 0 "The dries… 46
#> 10 bio18 mean monthly precipitation amo… kg m… 0.1 0 "The warme… 46
#> 11 bio19 mean monthly precipitation amo… kg m… 0.1 0 "The colde… 46
#> 12 bio2 mean diurnal air temperature r… °C 0.1 0 "mean diur… 46
#> 13 bio3 isothermality °C 0.1 0 "ratio of … 46
#> 14 bio4 temperature seasonality °C/1… 0.1 0 "standard … 46
#> 15 bio5 mean daily maximum air tempera… °C 0.1 -273. "The highe… 46
#> 16 bio6 mean daily minimum air tempera… °C 0.1 -273. "The lowes… 46
#> 17 bio7 annual range of air temperature °C 0.1 0 "The diffe… 46
#> 18 bio8 mean daily mean air temperatur… °C 0.1 -273. "The wette… 46
#> 19 bio9 mean daily mean air temperatur… °C 0.1 -273. "The dries… 46
#> 20 fcf Frost change frequency count NA NA "Number of… 46
#> 21 fgd first day of the growing seaso… juli… NA NA "first day… 46
#> 22 gdd0 Growing degree days heat sum a… °C 0.1 0 "heat sum … 46
#> 23 gdd10 Growing degree days heat sum a… °C 0.1 0 "heat sum … 46
#> 24 gdd5 Growing degree days heat sum a… °C 0.1 0 "heat sum … 46
#> 25 gddlgd0 Last growing degree day above … juli… NA NA "Last day … 46
#> 26 gddlgd10 Last growing degree day above … juli… NA NA "Last day … 46
#> 27 gddlgd5 Last growing degree day above … juli… NA NA "Last day … 46
#> 28 gdgfgd0 First growing degree day above… juli… NA NA "First day… 46
#> 29 gdgfgd10 First growing degree day above… juli… NA NA "First day… 46
#> 30 gdgfgd5 First growing degree day above… juli… NA NA "First day… 46
#> 31 gsl growing season length TREELIM numb… NA NA "Length of… 46
#> 32 gsp Accumulated precipiation amoun… kg m… 0.1 0 "precipita… 46
#> 33 gst Mean temperature of the growin… °C 0.1 -273. "Mean temp… 46
#> 34 kg0 Köppen-Geiger climate classifi… cate… NA NA "Köppen Ge… 46
#> 35 kg1 Köppen-Geiger climate classifi… cate… NA NA "Köppen Ge… 46
#> 36 kg2 Köppen-Geiger climate classifi… cate… NA NA "Köppen Ge… 46
#> 37 kg3 Köppen-Geiger climate classifi… cate… NA NA "Wissmann … 46
#> 38 kg4 Köppen-Geiger climate classifi… cate… NA NA "Thornthwa… 46
#> 39 kg5 Köppen-Geiger climate classifi… cate… NA NA "Troll-Pfa… 46
#> 40 lgd last day of the growing season… juli… NA NA "Last day … 46
#> 41 ngd0 Number of growing degree days numb… NA NA "Number of… 46
#> 42 ngd10 Number of growing degree days numb… NA NA "Number of… 46
#> 43 ngd5 Number of growing degree days numb… NA NA "Number of… 46
#> 44 npp Net primary productivity g C … 0.1 0 "Calculate… 46
#> 45 scd Snow cover days count NA NA "Number of… 46
#> 46 swe Snow water equivalent kg m… 0.1 0 "Amount of… 46
ecokit::ht(CHELSA_links)
#> url
#> <char>
#> 1: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/1981-2010/bio/CHELSA_bio1_1981-2010_V.2.1.tif
#> 2: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/1981-2010/bio/CHELSA_bio2_1981-2010_V.2.1.tif
#> 3: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/1981-2010/bio/CHELSA_bio3_1981-2010_V.2.1.tif
#> 4: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/1981-2010/bio/CHELSA_bio4_1981-2010_V.2.1.tif
#> 5: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/1981-2010/bio/CHELSA_bio5_1981-2010_V.2.1.tif
#> ---
#> 2112: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_ngd5_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2113: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_ngd10_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2114: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_npp_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2115: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_scd_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2116: https://os.zhdk.cloud.switch.ch/chelsav2/GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_swe_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> relative_url
#> <char>
#> 1: GLOBAL/climatologies/1981-2010/bio/CHELSA_bio1_1981-2010_V.2.1.tif
#> 2: GLOBAL/climatologies/1981-2010/bio/CHELSA_bio2_1981-2010_V.2.1.tif
#> 3: GLOBAL/climatologies/1981-2010/bio/CHELSA_bio3_1981-2010_V.2.1.tif
#> 4: GLOBAL/climatologies/1981-2010/bio/CHELSA_bio4_1981-2010_V.2.1.tif
#> 5: GLOBAL/climatologies/1981-2010/bio/CHELSA_bio5_1981-2010_V.2.1.tif
#> ---
#> 2112: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_ngd5_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2113: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_ngd10_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2114: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_npp_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2115: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_scd_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2116: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio/CHELSA_swe_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> file_name
#> <char>
#> 1: CHELSA_bio1_1981-2010_V.2.1.tif
#> 2: CHELSA_bio2_1981-2010_V.2.1.tif
#> 3: CHELSA_bio3_1981-2010_V.2.1.tif
#> 4: CHELSA_bio4_1981-2010_V.2.1.tif
#> 5: CHELSA_bio5_1981-2010_V.2.1.tif
#> ---
#> 2112: CHELSA_ngd5_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2113: CHELSA_ngd10_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2114: CHELSA_npp_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2115: CHELSA_scd_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> 2116: CHELSA_swe_2071-2100_ukesm1-0-ll_ssp585_V.2.1.tif
#> dir_name climate_scenario
#> <char> <char>
#> 1: GLOBAL/climatologies/1981-2010/bio current
#> 2: GLOBAL/climatologies/1981-2010/bio current
#> 3: GLOBAL/climatologies/1981-2010/bio current
#> 4: GLOBAL/climatologies/1981-2010/bio current
#> 5: GLOBAL/climatologies/1981-2010/bio current
#> ---
#> 2112: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio ssp585
#> 2113: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio ssp585
#> 2114: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio ssp585
#> 2115: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio ssp585
#> 2116: GLOBAL/climatologies/2071-2100/UKESM1-0-LL/ssp585/bio ssp585
#> climate_model year var_name
#> <char> <char> <char>
#> 1: current 1981-2010 bio1
#> 2: current 1981-2010 bio2
#> 3: current 1981-2010 bio3
#> 4: current 1981-2010 bio4
#> 5: current 1981-2010 bio5
#> ---
#> 2112: UKESM1-0-LL 2071-2100 ngd5
#> 2113: UKESM1-0-LL 2071-2100 ngd10
#> 2114: UKESM1-0-LL 2071-2100 npp
#> 2115: UKESM1-0-LL 2071-2100 scd
#> 2116: UKESM1-0-LL 2071-2100 swe
#> long_name unit
#> <char> <char>
#> 1: mean annual air temperature °C
#> 2: mean diurnal air temperature range °C
#> 3: isothermality °C
#> 4: temperature seasonality °C/100
#> 5: mean daily maximum air temperature of the warmest month °C
#> ---
#> 2112: Number of growing degree days number of days
#> 2113: Number of growing degree days number of days
#> 2114: Net primary productivity g C m−2 yr−1
#> 2115: Snow cover days count
#> 2116: Snow water equivalent kg m-2 year-1
#> scale offset
#> <num> <num>
#> 1: 0.1 -273.15
#> 2: 0.1 0.00
#> 3: 0.1 0.00
#> 4: 0.1 0.00
#> 5: 0.1 -273.15
#> ---
#> 2112: NA NA
#> 2113: NA NA
#> 2114: 0.1 0.00
#> 2115: NA NA
#> 2116: 0.1 0.00
#> explanation
#> <char>
#> 1: mean annual daily mean air temperatures averaged over 1 year
#> 2: mean diurnal range of temperatures averaged over 1 year
#> 3: ratio of diurnal variation to annual variation in temperatures
#> 4: standard deviation of the monthly mean temperatures
#> 5: The highest temperature of any monthly daily mean maximum temperature
#> ---
#> 2112: Number of days at which tas > 5°C
#> 2113: Number of days at which tas > 10°C
#> 2114: Calculated based on the ‘Miami model’, Lieth, H., 1972. "Modelling the primary productivity of the earth. Nature and resources", UNESCO, VIII, 2:5-10.
#> 2115: Number of days with snowcover calculated using the snowpack model implementation in from TREELIM (https://doi.org/10.1007/s00035-0140124-0)
#> 2116: Amount of liquid water if snow is melted