Investigating the Net Impact of Ecosystem Seasonality on Biogeochemistry in Climate Change Simulations

Keller, David and Oschlies, Andreas (2012) Investigating the Net Impact of Ecosystem Seasonality on Biogeochemistry in Climate Change Simulations [Poster] In: ASLO Ocean Sciences Meeting 2012, 20.-24.02.2012, Salt Lake City, USA.

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Abstract

Seasonal changes play an important role in marine ecosystem dynamics and biogeochemical cycles. Yet, some of the biogeochemical models used in climate change research have little ecosystem seasonality despite simulating observed annual properties (nutrient concentrations, productivity, dissolved inorganic carbon, oxygen, etc.) and seasonal changes in temperature with relatively good skill. In this study we investigated the importance of resolving ecosystem seasonality in climate change simulations by comparing two biogeochemical models that simulate annual properties similarly under present day conditions but have very different seasonal ecosystem dynamics. Both models were coupled to the same Earth system climate model and run from the onset of the industrial revolution until A.D. 2100 under a ‘‘business-as-usual’’ scenario for anthropogenic CO2 emissions. The results show that resolving ecosystem seasonality is important when simulating future climate scenarios but that the response time scales are different at different latitudes. Our results also suggest that it is important include seasonality in model evaluations in addition to annual changes.

Document Type: Conference or Workshop Item (Poster)
Keywords: Modelling, Climate Change, biogeochemistry, seasonality
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
Date Deposited: 19 Nov 2013 07:02
Last Modified: 19 Nov 2013 07:02
URI: http://eprints.uni-kiel.de/id/eprint/22434

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