BBC experiment running for 1 week
Tue, 21 Feb 2006

The BBC Climate Change Experiment has been running for one week. Huge thanks to the over 80,000 new participants for taking part! Don't worry if you are one of the people running quite slowly. Modelling the first few years is extremely useful for us, so do keep going. Many thanks also to all the people who are being so helpful on the message boards.

BBC的实验已经运行一个星期了
2006年2月21日 星期二
BBC的气候变迁实验已经运行一个星期了。非常感谢80000名志愿者的参与！不必担心你自己的机器算得太慢，在实验之初的几个模拟年对我们来说非常重要，所以请继续坚持下去吧。同时也很感谢所有关注本信息栏的朋友。

Another Advanced Modelling Experiment

Pardeep Pall, a DPhil student at Oxford University, and Tolu Aina of climateprediction.net have put together a higher-resolution atmospheric model for a seasonal attribution project (the UK 2000 floods). This may be of interest to current or prospective participants who have a 'higher spec' machine, as it requires 1GB of RAM! The experiment itself is of shorter length (3 weeks run-time typically); and you get to see the lovely higher-resolution graphics courtesy of Tolu. If you have just started a sulphur-cycle experiment you may want to suspend and attach to Pardeep's project for awhile instead. More information/website in the link below. Also note that soon the BBC coupled-model experiment (currently hosted at http://bbc.cpdn.org) will be available as a 'normal' workunit here at the main cp.net site. So most likely by the time you finish your current slab or sulphur run, it will be automatically downloaded as your next workunit. And again we'd like to take this opportunity to thank the many volunteer moderators and 'helpers' for the main and BBC experiment boards!

新实验！主页在：http://attribution.cpdn.org/。
由牛津大学的一位博士生Pardeep和CPDN的Tolu合作开发了一个高精度的气候模型，针对2000年英国的大洪水研究影响气候的人为因素。对机器的要求相当高，推荐1G内存，但任务包的长度并不大，一般大概三个星期就能完成，你将看到由Tolu完成的高精度的图形。另外，这个和CPDN项目是独立的。而目前BBC的实验不久后也将会作为CPDN的任务包供下载。

[ Last edited by Youth on 2006-3-12 at 08:34 ]

look out for CPDN on the BBC
Mon, 13 Mar 2006
The BBC 4 programmes will be repeated on BBC tomorrow (14th) - 'Meltdown' featuring Myles and an introduction to the new experiment at 2000, and 'Climate Conspiracy or Global Catastrophe?' featuring Dave Frame talking about the press coverage of our first results paper at 2320. In addition, Myles will be on BBC breakfast at 0720. I'm afraid that these programmes will only be viewable by those in the UK, sorry...

请关注BBC的CPDN
2006年3月13日 星期一
BBC的4个节目将在明天（14日）重播，20：00播放“Meltdown”，介绍Myles和一个新实验，而在23：20的 first results paper节目中将播放“气候的阴谋还是全球的灾难？”，介绍Dave Frame谈到的压力覆盖。另外，Myles将出现在BBC在7：20的早间报导时间。不过非常抱歉，可能只有英国的观众可以看到这些节目……

[ Last edited by tcogh327 on 2006-3-14 at 09:33 ]

也建议这个帖子不用置顶，等有新闻的时候再浮起来也许更能引起大家的注意：）

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 ]

大汗，也就是说从开始算到现在算的对研究没有帮助。除了对积分有帮助……

今天中午我發現我的BBC任務就這樣突然掛了
應該就是這個原因....
一個月...還我一個月的時間!!

CPDN Scientist David Frame on New 'Nature' Paper
Thu, 04 May 2006

Climateprediction.net scientist and former Project Coordinator Dr. David Frame is on a new paper published in the 20 April '06 issue of the science journal 'Nature' entitled 'Climate sensitivity constrained by temperature reconstructions over the past seven centuries.' The abstract follows: The magnitude and impact of future global warming depends on the sensitivity of the climate system to changes in greenhouse gas concentrations. The commonly accepted range for the equilibrium global mean temperature change in response to a doubling of the atmospheric carbon dioxide concentration1, termed climate sensitivity, is 1.5–4.5 K (ref. 2). A number of observational studies3–10, however, find a substantial probability of significantly higher sensitivities, yielding upper limits on climate sensitivity of 7.7K to above 9 K (refs 3–8). Here we demonstrate that such observational estimates of climate sensitivity can be tightened if reconstructions of Northern Hemisphere temperature over the past several centuries are considered. We use large-ensemble energy balance modelling and simulate the temperature response to past solar, volcanic and greenhouse gas forcing to determine which climate sensitivities yield simulations that are in agreement with proxy reconstructions. After accounting for the uncertainty in reconstructions and estimates of past external forcing, we find an independent estimate of climate sensitivity that is very similar to those from instrumental data. If the latter are combined with the result from all proxy reconstructions, then the 5–95 per cent range shrinks to 1.5–6.2 K, thus substantially reducing the probability of very high climate sensitivity.

CPDN科学家David Frame的文章被刊登在最新的一期《自然》杂志上
2006年5月4日，星期四
在2006年4月20日的定期科学刊物《自然》杂志上刊登了CPDN项目的科学家，以前的项目协调者，David Frame博士的一篇名为'Climate sensitivity constrained by temperature reconstructions over the past seven centuries.' （大概的意思是，关于过去七个世纪中的气温灵敏度模型的重新构造。MY GOD，天知道这是篇什么论文）的文章。其主要内容是：……（此处略去N字，总之是很牛，很专业了，请更牛更专业的朋友阅读英文原文）。

[ Last edited by tcogh327 on 2006-5-12 at 11:28 ]

BBC 'climate chaos' season starts tonight
Wed, 24 May 2006

For those in the U.K., a chance to see a series of programmes about climate change, including an update on the experiment's progress.
  
BBC “‘气候混沌’栏目”今晚开始
2006年5月24日星期三
在英国的朋友有机会看到一系列关于气候变迁的节目，其中还包括一个实验过程的改进.

PS：推荐大家访问BBC的网站，更多内容请关注：http://www.bbc.co.uk/sn/hottopics/climatechange/programmes1.shtml

[ Last edited by tcogh327 on 2006-5-26 at 09:22 ]

CPDN Open Day 2006
Wed, 21 Jun 2006

Following on from the success of the project open day in 2004, and the Royal Society exhibit last year, we've decided to make this summer's project open day a 'virtual' one - so that more participants have a chance to be involved. Key project staff and students will be recording talks which will be put up on the web site from the end of July. Watch the boards for opportunities to ask questions or make points you would like to see addressed in the talks. Hopefully, the boards will also provide opportunities for discussion after the talks are broadcast.

Scheduled maintenance
Thu, 29 Jun 2006

We'll be making some necessary server migration on Friday afternoon (June 30th) between 2 and 3.30 PM. There will be a brief downtime during this period. We will have things back up as soon as possible.

Scientific Computing Job on CPDN

We have funding (and need!) for a full-time, two-year computing position on CPDN. It will involve much needed network/server support, as well as opportunities for new software development (Python, C++, PHP). Please refer to the link below (Adobe PDF).

项目目前有资金并且有需求要招聘一个新职位，两年全职的系统维护及开发，详细说明请看：
http://www.climateprediction.net/project/cpdncompjob.pdf

Upload server problem
Wed, Nov 15 17:4

One of our upload servers is currently down due to hardware problems. Also, we have just been informed that the server would have to have been shut down tomorrow anyway, due to server room restructuring. We hope to have it back on line by the end of the week. Apologies for any inconvenience in the meantime.

上传服务器故障
11月15日
我们的一个上传服务器因为硬件故障当机了.而且由于要重新布置服务器房间,我们不得不在此宣布服务器将在明天关闭.希望周末能恢复.在此向全体志愿者表示歉意.


PS:系统太脆弱了吧,怎么让CPDN的FANS放心

[ Last edited by tcogh327 on 2006-12-1 at 12:48 ]

20 Million Model Years!
Tue, 9 Jan 2007  

Since the New Year CPDN has reached 20 million model years. Many thanks to all our participants!  

两千万个模型年！
2007年1月9日，星期二
自从新年以来，CPDN已经计算了2千万个模型年。非常感谢我们所有的志愿者！

On Sunday the 21st Jan. at 8pm BBC 1 will broadcast Climate Change: Britain Under Threat. This will include results from the BBC and CPDN experiments, and an interview with CPDN staff. In addition, results should appear on the BBC Climate Change website. Thanks to everyone who has taken part in these experiments; without your help this programme would not have been possible. Although the BBC are summarising results so far our experiment is continuing, so please keep on running your climate models!  

http://www.bbc.co.uk/bbcone/list ... _2000_4223_18875_60

http://www.bbc.co.uk/sn/hottopics/climatechange/

1月21日，BBC将播出“气候变化：威胁阴影下的英伦”。其中包含BBC和CPDN的实验结果以及对CPDN项目人员的访谈。该实验结果也将公布在BBCCPDN的网站上。感谢所有参加项目的用户。虽然BBC已经开始总结整理实验结果，但项目仍在继续，大家加油算吧！