Modeling climate change impacts on forest productivity with PnET-CN Emily Peters, Kirk Wythers, Peter Reich NE Landscape Plan Update May 17, 2012.

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Presentation transcript:

Modeling climate change impacts on forest productivity with PnET-CN Emily Peters, Kirk Wythers, Peter Reich NE Landscape Plan Update May 17, 2012

Aber et al Ecological Modelling - Stand/ ecosystem scale - Simulates carbon, water, and nitrogen cycling in forests PnET-CN Model Overview - “Big-leaf” model - Monthly time step - Represents forest types

Climate variables - air temperature - precipitation - solar radiation - CO 2 concentration - N deposition rates - O 3 concentration (D40) Site parameters - soil water holding capacity - land use history Model Inputs Vegetation parameters (n=46) - canopy traits (leaf lifespan, thickness) - photosynthesis & respiration - water balance - carbon allocation - biomass turnover - N concentration

Davis et al For. Eco. & Mgmt Ex: hardwood forest in West Virginia Model Outputs C cycling - Net primary production (wood, leaves, roots) - Net ecosystem production - C storage (wood, leaves, roots) N cycling - Net N mineralization - Net nitrification - Foliar N concentration H 2 O cycling - Evapotranspiration

Ollinger et al Mit. Ad. Strat. Glob. Chg. Ex: hardwood forest in New Hampshire Climate Change Application

Pan et al For. Eco. Mgmt Regional Application

- Model simulations from 1960 to climate scenarios: high & low emissions - 1 km resolution MN Climate Change Response Framework source: USFS 2007

1. Maps of NPP and change in NPP for 2040, 2070, and 2100 Expected Analyses Pan et al For. Eco. Mgmt 2. Compare relative influence of different global change factors on NPP (e.g. CO 2, temperature, O 3, N deposition)

Expected Analyses 3. What forest types do better/worse over time? Time (years) NPP 4. And where? Water holding capacity NPP change (%) 0 + -

Emily Peters Ecologist, Postdoc Kirk Wythers Peter Reich Lead P.I. Contact Information