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Creating_landuse_timeseries_50pft.md

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Creating landuse timeseries for 50 pfts

1. Why current ELM tools cannot be used for timeseries for 50 pfts?

  • ELM landuse timeseries is created by converting LUH2 data to LUH1 format.
  • The five LUH2 crop categories (c3ann, c4ann, c3per, c4per, and c3nfx) are condensed into a single cropland category for LUH1.
  • The Land Use Translator (LUT) then converts cropland into a single PFT.
  • We currently don't have the options to develop landuse timeseries for ELM's 36 different crop types.

2. Steps used for generating ELM landuse timeseries for 50 pfts

  • Therefore, I used the following steps to create landuse timeseries for 36 different crop types used in ELM:
    • Created landuse timeseries for the historical or future period using mksurfdata tool. This dataset had 17 pfts.
    • Then added timeseries data for additional pfts from NCAR generated landuse timeseries with 78pfts.
ELM old lu ts NCAR lu ts ELM modified lu ts
PFT 17 15 15 (based on ELM's 15 pfts)
CFT - 64 36 (generated by combining NCAR's 64 cfts)

3. Name and location generated landuse timeseries

The following landuse timeseries files were generated and saved on compy (/compyfs/inputdata/lnd/clm2/surfdata_map):

  • Historical:
    • ELM old lu ts: landuse.timeseries_0.9x1.25_HIST_simyr1850-2015_c201021.nc
    • NCAR lu ts: landuse.timeseries_0.9x1.25_hist_78pfts_simyr1850-2015_c170428.nc
    • ELM modified lu ts: 'landuse.timeseries_0.9x1.25_HIST_50pfts_simyr1850-2015_c220706.nc`
  • SSP1-RCP26:
    • ELM old lu ts: landuse.timeseries_0.9x1.25_SSP1_RCP26_simyr2015-2100_c220701.nc
    • NCAR lu ts: landuse.timeseries_0.9x1.25_SSP1-2.6_78pfts_CMIP6_simyr1850-2100_c181220.nc
    • ELM modified lu ts: landuse.timeseries_0.9x1.25_SSP1_RCP26_50pfts_simyr2015-2100_c220703.nc
  • SSP2-RCP45:
    • ELM old lu ts: landuse.timeseries_0.9x1.25_SSP2_RCP45_simyr2015-2100_c220701.nc
    • NCAR lu ts: landuse.timeseries_0.9x1.25_SSP2-4.5_78pfts_CMIP6_simyr1850-2100_c190102.nc
    • ELM modified lu ts: landuse.timeseries_0.9x1.25_SSP2_RCP45_50pfts_simyr2015-2100_c220703.nc
  • SSP5-RCP85:
    • ELM old lu ts: landuse.timeseries_0.9x1.25_SSP5_RCP85_simyr2015-2100_c220701.nc
    • NCAR lu ts: landuse.timeseries_0.9x1.25_SSP5-8.5_78pfts_CMIP6_simyr1850-2100_c181209.nc
    • ELM modified lu ts: landuse.timeseries_0.9x1.25_SSP5_RCP85_50pfts_simyr2015-2100_c220703.nc

4.Lookup table for creating ELM pft timeseries from NCAR's timeseries

ELM cft ELM cft Name NCAR cft NCAR cft name
0 c3_crop 0, 20, 22, 24, 28, 32, 34, 42, 50, 54 c3_crop, citrus, cocoa, coffee, datepalm, grapes, groundnuts, pulses, sugarbeet, sunflower
1 c3_irrigated 1, 21, 23, 25, 29, 33, 35, 43, 51, 55 c3_irrigated, irrigated_citrus, irrigated_cocoa, irrigated_coffee, irrigated_datepalm, irrigated_grapes, irrigated_groundnuts, irrigated_pulses, irrigated_sugarbeet, irrigated_sunflower
2 corn 2, 60 temperate_corn, tropical_corn
3 irrigated_corn 3, 61 irrigated_temperate_corn, irrigated_ tropical_corn
4 spring_temperate_cereal 4 spring_wheat
5 irrigated_spring_temperate_cereal 5 irrigated_spring_cereal
6 winter_temperate_cereal 6 winter_wheat
7 irrigated_winter_temperate_cereal 7 irrigated_winter_wheat
8 soybean 8, 62 temperate_soybean, tropical_soybean
9 irrigated_soybean 9, 63 irrigated_temperate_soybean, irrigated_tropical_soybean
10 cassava 18 cassava
11 irrigated_cassava 19 irrigated_cassava
12 cotton 26 cotton
13 irrigated_cotton 27 irrigated_cotton
14 foddergrass 30 foddergrass
15 irrigated_foddergrass 31 irrigated_foddergrass
16 oilpalm 38 oilpalm
17 irrigated_oilpalm 39 irrigated_oilpalm
18 other_grains 10, 12, 14, 16, 36, 48 barley, winter_barley, rye, winter_rye, millet, sorghum
19 irrigated_other_grains 11, 13, 15, 17, 37, 49 irrigated_barley, irrigated_winter_barley, irrigated_rye, irrigated_winter_rye, irrigated_millet, irrigated_sorghum
20 rapeseed 44 rapeseed
21 irrigated_rapeseed 45 irrigated_rapeseed
22 rice 46 rice
23 irrigated_rice 47 irrigated_rice
26 sugarcane 52 sugarcane
27 irrigated_sugarcane 53 irrigated_sugarcane
28 miscanthus 56 miscanthus
29 irrigated_miscanthus 57 irrigated_miscanthus
30 switchgrass 58 switchgrass
31 irrigated_switchgrass 59 irrigated_switchgrass
24 root_tubers 40 potatoes
25 irrigated_root_tubers 41 irrigated_potatoes
32 poplar - -
33 irrigated_poplar - -
34 willow - -
35 irrigated_willow - -