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发表于 2006-4-17 17:24:07
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Error discovered in the BBC Climate Change Experiment
论坛上的消息:
Error discovered in the BBC Climate Change Experiment
I regret to announce that we've recently discovered a major error in one of the files used by the climate model. The file in question specifies levels of man-made sulphate emissions but due to a problem with the file specification, models have been inputting greatly reduced levels throughout their runtime. The consequence of this is that aerosols responsible for "global dimming" (cooling) are not present in sufficient amounts and models have tended to warm up too quickly. The file specification error is also responsible for causing models to crash in 2013 which is how we originally came across the problem.
Unfortunately, all the data returned to us so far has been affected by this problem. While the data is scientifically very useful, and will certainly form the basis of future research (it allows us to investigate the full effect of greenhouse gas emissions without global dimming), it doesn't enable us to compare the models' performance against real world observations of the 20th century since such an important component is missing. In order to do the experiment we intended, we unfortunately have no choice but to start models again from the beginning.
So what now? We've spent the last few days fixing the error and we're in the process of generating and testing new model versions which should be ready in the next week or so. We very much hope you'll be prepared to keep running with us and, if so, all you need do is keep running your existing experiment and you will be automatically upgraded to a new model version next time you connect to our server via the automated system. We've removed all the old model versions so if you're waiting for a new workunit, they should be available within the week.
Apologies to all our participants on behalf of the CPDN team, it's a big disappointment to have to give you this news.
简单的翻译一下:CPDN的一个文件出现了严重错误,现在才发现,以前算的结果,现在重新计算。……(无语……)
下面是CPDN的官方新闻:
2006年4月15日
Unfortunately there was a major error in a file used on the recent coupled model experiment (the BBC experiment as well as those running 'hadcm3l' on the regular CPDN/BOINC site. A full explanation is in the link below; but basically the runs are going to be reset automatically so participants will get new, corrected models to download. We apologize for the inconvenience.
注:BBC实验也受到了这个错误的影响。CPDN的服务器在今天以前一直领不到新的任务,估计是在解决这个错误。所以现在下载的新的hadcm3l实验任务包(应该是hadcm3l的BETA实验,即hadcm3lb,如果你下载新的任务包就可以看到)应该是已经解决了这个问题。
PS:我想对于众多CPDN志愿者来说,这也不算一个坏消息,至少以前报废了那么多的WU,反正都对实验没有帮助,报废了就算了。正好从头开始。
[ Last edited by tcogh327 on 2006-4-17 at 17:35 ] |
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