date: Fri, 14 Dec 2007 08:48:41 +0000 (GMT) from: "jacopo.pasotti@bluewin.ch" subject: AW: Re: geomagnetic field and climate to: Dear Phil, thank you for your open and prompt answer. I am not just aiming to fuel non-sense debates, I wish you understand this. In the first paragraph of your answer, are you arguing there have might be some fraud in Courtillot paper? (I'll keep your answer strictly confidential). I understand your points on peer reviewing. However, Courtillot and co. are considered high profile scientists (http://www.copernicus. org/EGU/awards/medallists/_2005/petrus_peregrinus.html , as an example). And I, as a non specialist, get a bit confused as they argue that the others are not getting the right point around climate change. May I ask you: does any of those in the two papers I have sent you are involved in the IPCC? This is the only reliable source I may think of. I have read the Frohlich paper you have sent me. It seems there is agreement between Corutillot and Frohlich as they both notice a pre industrial influence of sun forcing in climate, but an abrupt shift since the 80ies. Thank you again, Jacopo ----Messaggio originale---- Da: p.jones@uea.ac.uk Data: 13.12.2007 18.29 A: Oggetto: Re: geomagnetic field and climate Jacopo, I'd put far more faith in the comment on the Courtillot paper by Bard and Delaygue. I was asked by Edouard Bard to try and locate the file Courtillot et al say they use in their response to Bard/Delaygue. All this is at the end of the Bard/Delaygue comment on p5/6. This name of this file is not the way I name files here. It is also not on the CRU web site and a google search doesn't find it! The global T record they (Courtillot et al) claim to use (Jones et al. 1999/Brohan et al. 2007) is not the same as the one we produce here. Edouard Bard was unable to reproduce their diagram with the correct series I sent him. This doesn't make much difference, but you wonder what other mistakes they have made. There is no need to invoke any geomagnetic indices to explain the global T record. It can be quite well approximated from a solar series (preferably a recent one by Lean), a volcano series and anthropogenic sources (greenhouse gases and sulphate aerosols) . I think if you want to refer to this subject at least refer to a good paper on the subject. I am attaching one. This is far better and well argued paper. The answers to all your questions will be in this paper. Frohlich is Swiss, so better to report on a correct Swiss than a French person who doesn't understand the climate system! There are two problems/issues in the climate field 1. Journals publish papers by Courtillot et al (and probably shouldn't). They give some unscrupulous people an excuse to say there is disagreement amongst climate scientists about what is happening and how much WE are to blame. Courtillot et al may understand magnetism, but they don't understand the climate system. I don't try and publish on magnetism! People think they can publish in the climate field without knowing little about the literature. There are too many journals (and still growing) and all have difficulty finding qualified reviewers. 2. The media are constantly picking up geo-engineering solutions to the climate change issue. This gives the public and some politicians a belief that there is a fix around the corner. There isn't. The only way to slow the increase in temperature is to reduce emissions. Cheers Phil At 12:46 13/12/2007, you wrote: >I am a journalist, I live and work in Basel, Switzerland. I happen >to report to Science magazine, occasionally, I have read with >interest a paper to be published on Earth and Planetary Science >Letters about magnetic forcing on climate change. I thought that >the >solar forcing of climate was quite debunked, but I see there it is >offered >another perspective. In fact, I was not aware about this >geomagnetic >perspective on climate. >I am going to report about it on Science magazine and I would very >much like to hear you opinion (because of your profile in this >subject and because you are widely quoted in the paper). > >Courtillot claims that up to 1980, on 10-100 scale, and 1000- 10000 >scale climate change correlates well with changes in geomagnetic >field of earth (no causality). Correct? > >What would be the driver of the change in geomagnetic field? > >It seems Courtillot does not neglect the anthropogenic rise since >ca 1980. Correct? > >Courtillot suggests a potential cause could be in" modulation of >cosmic rays which are increasingly recognised as potential drivers of >changes in cloud cover and albedo". Correct (or could you please >explain me better; considering that I am not a specialist in this >field)? > >Is it really "increasingly recognised"? > >How much changes in cloud cover and albedo due to cosmic rays could >effect the climate change? > >On which basis scientists reject this hpothesis? After all >Courtillot just says we should investigate more in this direction. He >does not reject the CO2 hypothesis at all. Instead he acceptes it for >the last few decades? > >What are the scientific implications of Courtillot's claims, would >these be proven to be correct? I mean with regards with IPCC >projections and alike. > > >Thank you and best regards (in case we may speak over the phone >tomorrow). >Jacopo Pasotti >PS I include the paper and a comment on. But mind that there is a >reply on the comment in the journal's website. >- >Jacopo Pasotti, MSc. >Science Communicator >Science Journalist > >Basel - Switzerland >Mobile: +41.(0)787627785 >Home: +41.(0)61.3611340 >jacopo.pasotti@bluewin.ch >www.scienceandnature.net > > > > > Prof. Phil Jones Climatic Research Unit Telephone +44 (0) 1603 592090 School of Environmental Sciences Fax +44 (0) 1603 507784 University of East Anglia Norwich Email p.jones@uea.ac.uk NR4 7TJ UK ----------------------------------------------------------------------------