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Carbon Monitoring of Agricultural Lands: Developing a Globally Consistent Estimate of Carbon Stocks and Fluxes Julie Wolf 1, Stephen Ogle 2 and Tris West.

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Presentation on theme: "Carbon Monitoring of Agricultural Lands: Developing a Globally Consistent Estimate of Carbon Stocks and Fluxes Julie Wolf 1, Stephen Ogle 2 and Tris West."— Presentation transcript:

1 Carbon Monitoring of Agricultural Lands: Developing a Globally Consistent Estimate of Carbon Stocks and Fluxes Julie Wolf 1, Stephen Ogle 2 and Tris West 1 1 Joint Global Change Research Institute 2 Natural Resource Ecology Laboratory, CSU CMS 2014 Science Team Meeting

2 Objectives: Our 2012 project quantified global agricultural carbon fluxes in detail, excluding soil carbon:

3 Objectives: Complete spatially resolved global agricultural carbon budget.

4 Objectives: Complete spatially resolved global agricultural carbon budget. 1.Quantify and spatially distribute changes in soil carbon on global agricultural lands 2.Quantify and distribute grassland productivity and consumption through livestock grazing

5 From 2012 project: Crop NPP components distributed spatially at 0.05°

6 From 2012 project: Livestock flux components distributed spatially at 0.05°

7 From 2012 project: Detailed livestock intake (top panel) and percent intake from forage/grazing (lower panel)

8 Objectives: Complete spatially resolved global agricultural carbon budget. 1.Quantify and spatially distribute annual changes in soil carbon on global agricultural lands 2.Quantify and distribute grassland productivity and consumption through livestock grazing Build on previous results.

9 Methods: 1. Global agricultural soil carbon: Model change and uncertainty at 0.05 degree resolution for recent 5-year periods Simplified crop-specific Century-like model Builds off of recent EPA-funded study soil carbon change led by Stephen Ogle.

10 Methods: 1. Global agricultural soil carbon: Previous results drive model: 1.Gridded crop NPP 2.Crop residue left on field 3.Crop belowground biomass 4.Nitrogen and lignin contents of crop biomass 5.Manure application to agricultural lands Along with: 6.Soil texture (HWSD) 7.Temperature and precipitation (CRU) 8.Irrigation (MIRCA 2000) 9.Tillage practices

11 Methods: Manure application to agricultural lands

12 Methods: Manure application to agricultural lands

13 Methods: 2. Grassland productivity and consumption: Model global grassland productivity at 0.05° based on mean precipitation Combine with our estimates of livestock forage intake so that grazed lands can be included in agricultural budgets

14 Significance: Consistent with Tier 3 IPCC global soil carbon change guidelines, but with: – Better inputs – finer spatial resolution – Improved uncertainty estimates – Global coverage Fills gap for our flux product and provides globally consistent soil carbon change estimates for all agricultural lands.

15 Significance: By quantifying – cropland soil carbon change and – grassland carbon fluxes we complete agricultural carbon budgets and generate comprehensive agricultural flux estimates. Project is ongoing.

16 Thank you.

17 Methods: 1. Globa

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