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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20120315T000000
DTEND;TZID=Atlantic/Canary:20120315T010000
UID:iactalks-378
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/378
CREATED:2012-03-15T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Can solar activity and cosmic rays save us from global warming?
DESCRIPTION:Can solar activity and cosmic rays save us from global warming?
 \nMr. Jasa Calogovic\n\nGlobal warming has often been portrayed as being c
 onnected only to  greenhouse gasses in widespread media. However, these ar
 e just one of  many factors influencing Earth’s climate. Over long t
 imescales the Sun  has been the major force driving climate changes. So-ca
 lled global  warming skeptics often use arguments of natural (solar driven
 ) climate  changes to argue that anthropogenic influences on the climate o
 ver last  century have been largely overestimated. These arguments frequen
 tly  involve hypothesized solar – climate linkages, for which there 
 is a low  level of scientific understanding, making the arguments problema
 tic to  easily prove or refute. There are three solar parameters proposed 
 which  may influence the Earth’s climate: total solar irradiance (TS
 I),  ultraviolet (UV) spectral irradiance, or the galactic cosmic ray (GCR
 )  flux. In recent years there has been a vigorous debate in scientific  c
 ommunity regarding the notion of a cosmic rays influence on clouds  cover.
  If true, such a link could have serious implications for our  understandi
 ng of climate change: consequently, this has become one of  the most frequ
 ent arguments of global warming skeptics. This talk will  give a short ove
 rview of different forcing factors in the climate  system, give a descript
 ion of some hypothesized mechanisms linking solar  activity to Earth&rsquo
 ;s climate, and present our current work aiming to  resolve the hypothesiz
 ed link between cosmic rays and clouds.
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