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Results of each simulation can be viewed by clicking this plot of the annual global mean temperature for each ensemble member (black lines), the ensemble mean (red line) and the observational estimate (blue line). |
Another activity of the CKO is the "Dutch Challenge Project". This project is initiated in order to study the impact of a warming world on the occurances of extreme weather events, such as extreme storms, cold and hot spells, droughts etc.
For this purpose we use the Community Climate System Model (CSM). The CSM model is a fully-coupled, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states.
With CSM we simulated the earths' climate for the period 1940-2080 (see "Setup of the integration" below). We wanted to perform at least 50 simulations over this period, each starting from a slightly different initial condition, in order to be able to estimate extreme events with return periods of the order of 1000 years and changes therein due to Green House Gases (GHG) concentration changes. A number of other climate research questions will be adressed with this ensemble as well (See "Research questions" below).
To generate such an ensemble of simulations we needed massive computerpower. Three months of cpu time of 256 processors on the TERAS supercomputer situated at "SARA Reken- en Netwerkdiensten" in Amsterdam were dedicated to this project (see also project proposal ). This enabled us to do the job. The TERAS is an Origin 3800 platform with 1024 processors and belongs to the 150 most powerfull computers in the world.
The computing job started on june 1st 2003 and ended in the end of august 2003. in total we performed 62 simulations.
All output data is freely available for any institution/company that is interested in it (contact: Xueli Wang)
You can find more information about the following subjects:
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Results of each simulation can be viewed by clicking this plot of the annual global mean temperature for each ensemble member (black lines), the ensemble mean (red line) and the observational estimate (blue line). |
| People who are involved in the Challenge Project can enter this discussionforum if they want to post a message to the other Challenge members. Your username is your last name without (eventual) "van" or "van den" (e.g. "dijkstra" or "oldenborgh"). The password is "challenge". |
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