Phosphorus and Nitrogen interactions in ecosystem models

Workshop

The Objectives of this workshop are to review the state-of-the art of P models, especially N-P interactions, discuss possible new conceptual representations of N-P interactions as well as possibilities for comparison studies with field data.

Background:
Synergistic interactions between limited nutrient supplies of P and N are widespread in terrestrial ecosystems, for example evidence in several long-term fertilization experiments in Sweden. Recent research also highlights the increasing importance of P and its co-limitation with N in regulating terrestrial biogeochemical processes under current global changes, i.e., climate change and recovery of soil acidification. Within MERGE, P cycle are included in models in various degree with different focuses. There is an urgent need of synthesizing the N-P interactions in order to a better understand and model the biogeochemistry of P in current ecosystem models. This could significantly improve the predictions of interactions between biogeochemical cycles in a changing environment.


Program
9:40 Coffee/tea + sandwich registration

10:00 Welcome and Presentation
Annemieke Gärdenäs and Hongxing He, University of Gothenburg

10:20 Scientific need of integrating P and N interactions in solving environmental
Issues Annemieke Gärdenäs, University of Gothenburg

10:40 leg stretching

P cycle in ecosystem models

10:50 P cycle and its interaction with N in CoupModel v6
Hongxing He, University of Gothenburg

11:10 P cycling of Forsafe model
Salim Belyazid, Stockholm University

11:30 HYPE P model and its link with N in aquatic systems
Alena Bartosova, SMHI

11:50 lunch

13:00 P model in QUINCY model
Lin Yu, Max Planck Institute for Biogeochemistry

13:20 P cycle in LPJGuess model
Katrin Fleischer, Technical Univ. of Munich and David Wårlind, Lund Univ.

Joint discussions and concluding remarks

13:40 Coffee/tea

14:50 Joint discussion P and N processes, concept, scaling/upscaling issues

15:00 Concluding remarks and future plan

15:30 Departure