The four KNMI'06 scenarios published in 2006 serve as the national standard in adaptation strategies. They are guiding in the process of climate proofing the Netherlands, in particular for water management. For specific users and applications, additional scenarios are required. For example, more extreme scenarios have been developed to quantify the consequences of abrupt changes with large impacts, such as the shutdown of the warm Gulf Stream. Additional scenarios have been developed by both KNMI and other parties. A selection of these additional scenarios is presented here, together with scenarios developed in neighbouring countries of Western Europe.

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(Delta Committee scenarios)

In 2007 KNMI has developed several 'extreme' scenarios as a contribution to the Climate Changes Spatial Planning project 'Attention for safety (AVV)'. These scenarios are plausible but have low probability. They are intended to assess the safety issues related to flooding in the Netherlands. The scenarios include extreme sea level rise, shutdown of the warm Gulf Stream, 'super' storms, extreme summer rainfall, and extreme discharge of the rivers Rhine and Muese.
(AVV scenarios (pdf; in Dutch))

In 2008 TNO has added two extreme scenarios (E and E+) to the four KNMI'06 scenarios in order to assess the economic effects of climate change. These additional scenarios are simple extrapolations of the KNMI'06 scenarios, assuming +6°C global temperature rise in 2100, rather than the +2°C in the KNMI'06 G and G+ scenarios or the +4°C in the KNMI'06 W and W+ scenarios.
(TNO scenarios (in Dutch))

Several neighbouring countries in Western Europe have developed climate change scenarios for their territory. Most of these scenarios are based on the same climate model projections as used for the KNMI'06 scenarios. The exact methodology to construct the local scenarios differs however from country to country. Different from the procedure for the KNMI'06 scenarios, many countries use the (downscaled) projections from a single climate model, rather than the full range of projections.

United Kingdom: The Met Office together with other parties has developed new climate scenarios for the United Kingdom in 2009 (UKCP09). These are full probabilistic local projections of future climate change.
(UKCIP scenarios gateway)