Göran Berndes Chalmers University of Technology, Sweden IEA Bioenergy Task 43 Expanding Bioenergy – Global Potentials and Regional Challenges.

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Presentation transcript:

Göran Berndes Chalmers University of Technology, Sweden IEA Bioenergy Task 43 Expanding Bioenergy – Global Potentials and Regional Challenges

Atmospheric CO 2 concentration during the past years (from the Vostok Ice Core) Today ~392 ppm Year 2100 if business as usual

Source: Klein Goldewijk, RIVM, The Netherlands

Frontier forests 8000 years ago

Frontier forests today

Irrigated cereal production, Saudi Arabia

Bioenergy in the Anthroposcene

Food Source: FAO

Bioenergy in the Anthroposcene Food 2050 Food 2050 Source: FAO

Bioenergy in the Anthroposcene Food 2050 Food 2050 Sources: FAO & IPCC SREN Bioenergy 2050 (deployment at ppm) Bioenergy 2050 (deployment at ppm)

Bioenergy in the Anthroposcene Food 2050 Food 2050 Sources: FAO & IPCC SREN Bioenergy 2050 (deployment at ppm) Bioenergy 2050 (deployment at ppm) Bioenergy 2050 (deployment at <440 ppm) Bioenergy 2050 (deployment at <440 ppm)

Bioenergy in the Anthroposcene Food 2050 Food 2050 Sources: FAO & IPCC SREN Bioenergy 2050 (deployment at ppm) Bioenergy 2050 (deployment at ppm) Bioenergy 2050 (deployment at <440 ppm) Bioenergy 2050 (deployment at <440 ppm) Global industrial roundwood

To-do… Produce more food on a smaller area and with lower impacts Increase biomass output from forestry while keeping the forests healthy and respecting biodiversity requirements Expand bioenergy production in ways that are acceptable from the perspectives of resources, environment, and socio-economy

Room for bioenergy plantations?

Biophysical assessments indicate considerable bioenergy supply potentials Land suitability for herbaceous and woody lignocellulosic plants (Fischer et al 2009)

…but requires high agriculture productivity growth (and it helps if we eat less meet) A2: 2050 A1: 2050 Illustrative example study: land availability for energy crops (Hoogwijk et al. 2005)

Large C stock and lots of biodiversity Smaller C stock and less biodiversity Crop growth Dense forestBioenergy plantation: Annual CO 2 savings much lower than the CO 2 emissions from forest conversion CO 2 Biofuel production and use Closed loop CO 2 …and bioenergy expansion needs to be guided in attractive directions

Regional challenges and possibilities

THANK YOU!

Integration of sugarcane ethanol production with livestock production Stimulates livestock productivity increase, creating space for cane Large local socioeconomic benefits and reduced risk of displacement Bioenergy-food integration… Traditional cattle 20 % Forest reserve Pasture 80% Integrated cattle sugarcane farm 20 % Forest reserve Pasture (summer) 30% Sugarcane 50% Winter restricts productivity 20 ha 20 cows (13 in milk prod.) 4.5 L/day Sugarcane Winter feed Ethanol

Most of the potential for expanding cropland area is concentrated in Latin America and Sub-Saharan Africa. Much of the area is presently covered by forests and other natural ecosystems and has more or less serious climate/soil constraints Land suitability for cellulosic crop production (Fischer et al 2009) Bioenergy Potentials: the supply side (part 1) Cropland around year 2000 Total suitable for rain- fed crop production

Establishment of bioenergy plantations can also lead to that CO 2 is assimilated into soils and biomass, enhancing the GHG savings. Wisely located, designed and managed plantations can also provide additional environmental services, including be beneficial for biodiversity Small C stock Degraded pastureBioenergy plantation: CO 2 assimilation in growing plantation enhances CO 2 benefits CO 2 Larger C stock Crop growth CO 2 Closed loop Biofuel production and use Expanding bioenergy : challenges

There are significant yield gaps to exploit so potential for improving yield levels in many places Bioenergy Potentials: the supply side (part 2)

But the intensification requires increased inputs of e.g., N Expanding bioenergy : challenges

Pastures = 25 x sugarcane area Bioenergy-food integration…

Integration of sugarcane ethanol production with livestock production Stimulates livestock productivity increase, creating space for cane Large local socioeconomic benefits and reduced risk of displacement Bioenergy-food integration… Traditional cattle 20 % Forest reserve Pasture 80% Integrated cattle sugarcane farm 20 % Forest reserve Pasture (summer) 30% Sugarcane 50% Winter restricts productivity 20 ha 20 cows (13 in milk prod.) 4.5 L/day Sugarcane Winter feed Ethanol

Water implications of bioenergy Pastures = 25 x sugarcane area

Water implications of bioenergy

Role of bioenergy in strategies to… Increase productive use of blue/green water flows improve water productivity in agriculture

Role of bioenergy in strategies to… Increase productive use of blue/green water flows improve water productivity in agriculture

Historic land use change Source: Klein Goldewijk, RIVM, The Netherlands

Historic land use change Mha cropland Mha pastures ca 1600 Mha cropland ca 3200 Mha pastures Year 1700 Present situation (roughly) Source: Klein Goldewijk, RIVM, The Netherlands

LUC emissions...

GHG benefits of expanding bioenergy? Source: Berndes 2006

Reports available for download: