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A new historical global crop time series for evaluating CLM5 crop distributions, harvest
area, irrigation and yieldsPeter Lawrence
NCAR – Terrestrial Sciences Section
co authors: Danica Lombardozzi, Dave Lawrence and many others
Slide 1 - Title
New Resolution0.25° grid-cell fraction
New HistoryHyde 3.2, FAO basedLandsat F/NF Multiple crop types (5)Multiple pasture types (2)Updated Forest Cover/BiomassUpdated Wood harvestUpdated Shifting CultivationExtended time domain (850-2015)
New Management LayersAgricultureFraction of cropland irrigatedFraction of cropland floodedFraction of cropland fertilizedIndustrial Fertilizer applicationFraction of cropland for biofuelsCrop rotationsWood HarvestFraction industrial productsFraction commercial biofuelsFraction fuelwood
New Future ScenariosSix futures, SSP-based
Gridcell
Landunit
Vegetated Crop
Unirrig Irrig
Crop1 Crop1…
The transient land use time series data set provides annual information on, Natural Vegetation and Crop distributions as well as fertilizer and irrigation
Soil
PFT1 PFT2 PFT3…
Slide 4 – Land Cover Change
CLM5 Crop – Crop Yield and Production – Lombardozzi et al 2018
Slide 4 – Land Cover Change
CLM5 Crop – Crop Yield and Production – Lombardozzi et al 2018
- UN FAOSTAT provides annual country level statistics for crop harvest area and yield for 178 crops for 258 countries from 1961 – 2016
Global Crop Area, Yield and Irrigation Evaluation Data
Slide 2 - Outline
- MIRCA2000 (Monthly Irrigated and Rainfed Crop Areas) (Portmann et al 2010) provides global rainfed and irrigated physical distribution maps for 26 crops representing the average for the period 1998 – 2002 at 5 arc minutes resolution (~9km). Current guidance for CLM5 crop mapping from CMIP6/LUMIP LUH2 time series data.
- MapSPAM (Spatial Production Allocation Model) (You et al 2017) provides global rainfed and irrigated maps for physical and harvested area, production, and yield for the year 2005 for 42 crops for the year 2005 also at 5 arc minutes
- UN FAOSTAT provides extensive country level data for the period 1961 –2016 for 178 crops but is tabular and difficult use with CLM5 Crop beyond global or regional aggregate numbers.
Global Crop Area, Yield and Irrigation Evaluation Data
Slide 2 - Outline
- MIRCA2000 provides global rainfed and irrigated physical distribution maps for 26 crops but is only a single time period and has no yield information.
- MapSPAM provides global rainfed and irrigated maps for physical and harvested area, production, and yield for 42 crops but is also only for a single time period.
- Integrating these three products with the ESRI countries of the world map at 1km resolution we have produced a series of global maps for Crop Physical, Harvest and Irrigation Areas, with Yield and Production for 48 crops at 1km resolution for 1961 – 2016. For practical purposes the data is regridded to 0.25 or FV 0.9x1.25 degree resolution.
- The UN FAOSTAT data is spatially downscaled for each country for each year using either the MIRCA2000 or MapSPAM physical, harvest or irrigated crop areas, and the MapSPAM yield data for guidance.
- The Global Crop Time Series crop list is a inclusive composition of the CLM5, UN FAOSTAT, MIRCA2000 and MapSPAM crop lists:
Global Crop Time Series Evaluation Data
Slide 2 - Outline
1. Banana 2. Barley 3. Beans 4. Cassava 5. CerealsOther
6. Chickpea
7. Citrus 8. Cocoa 9. Coconut 10. Coffee Arabica
11. Coffee Robusta
12. Cotton
13. Cowpea 14. Date Palm 15. Fibers Other
16. Fruit Other Temp
17. Fruit Other Trop
18. Grapes
19. Ground nut
20. Lentil 21. Maize 22. MilletPearl
23. Millet Small
24. Oats
25. Oil Crop Other
26. Oil Palm 27. Pigeon Pea
28. Plantain 29. Potato 30. Pulses Other
31. Rapeseed Canola
32. Rest of Annual Crops
33. Rest of Perennial
34. Rice 35. Roots and Tubers Oth.
36. Rye
37. Sesame Seed
38. Sorghum 39. Soybean 40. Sugar Beet
41. Sugar Cane
42. Sunflower
43. SweetPotato
44. Tea 45. Tobacco 46. VegetableOther
47. Wheat 48. Yam
Slide 4 – Land Cover Change
Global Crop Time Series – UN FAOSTAT/MIRCA/SPAM 1961 - 2016UNFAO Country Level Data
MIRCA2000 Crop / IrrigationPortmann et al. (2010)
Global UNFAO Crop Spatial Database
- Crop- Year- Area
- Yield- Fertilizer- Irrigation
Slide 4 – Land Cover Change
LUH2/CLM5 – Global Crop Time Series (Harvested Area)
Slide 4 – Land Cover Change
LUH2/CLM5 – GCTS – MIRCA200 – MapSPAM All Crops
Slide 4 – Land Cover Change
LUH2/CLM5 – GCTS – MIRCA200 – MapSPAM Wheat
Slide 4 – Land Cover Change
LUH2/CLM5 – GCTS – MIRCA200 – MapSPAM Maize
Slide 4 – Land Cover Change
LUH2/CLM5 – GCTS – MIRCA200 – MapSPAM Rice
Slide 4 – Land Cover Change
CLM5 Crop – Crop Yield and Production – Lombardozzi et al 2018
Slide 4 – Land Cover Change
GCTS (FAO) – USDA NASS – CLM5 Crop Maize Yields 1991 - 2010
Lombardozzi et al 2018
Slide 4 – Land Cover Change
GCTS (FAO) – USDA NASS – CLM5 Crop Wheat Yields 1991 - 2010
Lombardozzi et al 2018
Slide 4 – Land Cover Change
GCTS – USDA NASS – CLM5 Crop Soybean Yields 1991 - 2010
Lombardozzi et al 2018
Slide 4 – Land Cover Change
LUH2 – CLM5 – UNFAO Global Crop Time Series
CLM Land Use Data
Tool
“mksrf “CLM Land
Surface Properties
Tool
CLM/CESM
Historical or future land use
time series
Current day vegetation
(PFTs)
Data
Data
CLM5 raw CFT/PFT
files
LUMIP format:12 land unitsTransitionsManagement
CLM5 other raw data files
CLM5 format:~9 Crop Types~15 Plant TypesManagement
Current day cropping (CFTs)
Remap Annual LUH2 Crop Land Units to CLM5 Crop Functional Types using current day crop fractions from MIRCA2000:
- C3Ann -> Wheat, Rice, Barley, Rye, Sunflower, Potatoes, Sugar beet, Rape seed, Fodder grass
- C4Ann -> Maize, Millet, Sorghum
- C3Per -> Cassava, Oil palm, Citrus, Date palm, Grapes, Cotton, Cocoa, Coffee
- C4Per -> Sugar cane
- C3Nfx -> Soybeans, Groundnuts, Pulses
CLM5 Crop Distributions
Slide 2 - Outline
Thanks – Questions?
