Jasper Kirkby is an experimental particle physicist at CERN, Switzerland. After completing his degrees at Oxford and London, he spent 12 years at Stanford before joining CERN in 1984. He has built detectors and carried out experiments at accelerators in the United States (BNL AGS, SLAC Linac, SPEAR, and PEP) and Europe (CERN PS, LEP, PSI and RAL). He originated the idea for a new accelerator known as the Tau-Charm Factory, which eventually led to BEPCII in Beijing. He has conceived of and led several large experiments at accelerators: the DELCO detector at SPEAR; the DELCO detector at PEP; the FAST experiment at PSI; and the CLOUD experiment at CERN." http://cloud.web.cern.ch/cloud/People/Jasper.html
Jasper Kirkby: The CLOUD experiment at CERN
Last picture below: Global occurrence diagram of 'Ship Trails' Structure
Relating to the first video of the post above (1:10 min)
The excerpt from the first video in the post above appears on Minute: 45 Second: 5 .
Published on March 5th 2012 "Jasper Kirkby (speaker) (CERN) CERN. Geneva (CERN Colloquium) on 2009-06-04T16:30:00 The current understanding of climate change in the industrial age is that it is predominantly caused by anthropogenic greenhouse gases, with relatively small natural contributions due to solar irradiance and volcanoes. However, palaeoclimatic reconstructions show that the climate has frequently varied on 100-year time scales during the Holocene (last 10 kyr) by amounts comparable to the present warming - and yet the mechanism or mechanisms are not understood. Some of these reconstructions show clear associations with solar variability, which is recorded in the light radio-isotope archives that measure past variations of cosmic ray intensity. However, despite the increasing evidence of its importance, solar-climate variability is likely to remain controversial until a physical mechanism is established. Estimated changes of solar irradiance on these time scales appear to be too small to account for the climate observations. This raises the question of whether cosmic rays may directly affect the climate, providing an effective indirect solar forcing mechanism. Indeed recent satellite observations - although disputed - suggest that cosmic rays may affect clouds. This talk presents an overview of the palaeoclimatic evidence for solar/cosmic ray forcing of the climate, and reviews the possible physical mechanisms. These will be investigated in the CLOUD experiment which begins to take data at the CERN PS later this year. http://cdsweb.cern.ch/record/1181073 more http://indico.cern.ch/conferenceDispl... "
