Nir Shaviv

Nir J. Shaviv


  • Ph.D., Physics. Israel Institute of Technology, 1996.
  • M.A., Physics. Israel Institute of Technology, 1994.
  • B.A., Physics. Israel Institute of Technology, 1990.

Source: [1]


Nir J. Shaviv is an associate professor of Physics at the Racah Institute at the The Hebrew University of Jerusalem. He contends that the sun's rays are the primary driver of climate change.

Dr. Shaviv says that he is not funded by the oil industry or large corporations. Although he is skeptical of man-made climate change, he stresses that there are a “dozen good reasons why we should strive to burn less fossil fuels.” His two primary reasons are pollution and depletion. He is in favor of developing cheap energy alternatives such as wind and solar power.

Stance on Climate Change

Shaviv does not agree with scientific claims that greenhouse gases are the main driver of global warming. He believes there is no scientific evidence linking carbon dioxide and global warming:

“In fact, there is no substantial evidence which proves that CO2 and other GHGs are the primary cause for the warming, and not some other mechanism. You may have seen articles which point to the contrary, that there is clear evidence, but if you dig deeply into them, you will realize that these are merely suggestions for a CO2 climate link and not evidence.” [2]

The real driver of climate change and global warming, according to Shaviv, is solar activity.

Shaviv explains that “when there are fewer ions, the clouds that are formed are composed of large drops. Clouds of this type are less white and refract less of the sun's rays outward, and so the heat is preserved and the earth gets warmer.” [3]

In a view completely opposite to that of the IPCC, Dr. Shaviv believes that increasing temperatures lead to an increase in carbon dioxide, and not the other way around.  He contends that “if we double the amound of CO2 by 2100, we will only increase the temperature by about one degree Celsius.”

According to Shaviv, two thirds of the warming in the 20th century were caused by natural factors, and only one third by anthropogenic causes.  He does stress anthropogenic causes will most likely be the dominant driver of warming in the 21st century. That being said, Shaviv is against the Kyoto Protocol and believes that “the hysteria surrounding the concept of 'global warming' will fade over the years.”

Key Quotes

“At least half of the warming over the 20th century is because of the sun … it means we don't have to worry about warming over the 21st century.”  [4]

Key Deeds

November 30 - December 1, 2012

Nir Shaviv was a speaker (PDF) at the Eighth International Conference on Climate Change (ICCC-8)/Fifth International Conference on Climate and Energy (ICCE-5) sponsored by both the Heartland Institute and the European Institute for Climate and Energy (EIKE). Shaviv's speech is titled “The cosmic ray climate link - evidence and implications to the understanding of climate change.” [12]

May 21 - 23, 2012

Nir Shaviv was a speaker at the Heartland Institute's 7th International Conference on Climate Change (ICCC7).

DeSmogBlog researched the co-sponsors behind Heartland's ICCC7 and found that they had collectively received over $67 million from ExxonMobil, the Koch Brothers and the conservative Scaife family foundations.

January 27, 2012

Shaviv signed a Wall Street Journal Op-Ed titled “No Need to Panic About Global Warming.”

Other signatures include those of Claude AllègreJan BreslowWilliam Happer, William Kininmonth, Richard Lindzen, James McGrath, Rodney Nichols, Burt Rutan, Harrison H. SchmittEdward David, Michael Kelly, Henk Tennekes, and Antonino Zichichi.

Media transparency found that the article had misrepresented the position of Yale economist William Nordhaus. Skeptical Science also did a comprehensive examination of the signatories revealing that few have published anything in peer-reviewed journal on the subject of climate change.

March 9, 2009

Spoke at the Heartland Institute's 2009 International Conference on Climate Change. Shaviv's speech was titled “New Solar-Climate Link and Implications for Our Understanding of Climate Change.” [5]


Appeared in the film, “The Cloud Mystery” which focuses on the studies of fellow skeptic Henrik Svensmark who, similar to Shaviv, believes that solar rays drive climate change. 

March, 2007

Appeared on “The Great Global Warming Swindle,” a documentary that claims to refute the theory of man-made global warming. Other climate change skeptics appearing on the program include Tim Ball, Nigel Lawson, Ian Clark, John Christy, Richard Lindzen, Patrick Michaels, Syun-Ichi Akasofu, Fred Singer, Roy Spencer, and Paul Driessen.

The film generated considerable controversy. The uproar was led by one of the scientists who appeared in the film, MIT's Carl Wunsch. Wunsch stated that he was swindled by the film producers.  He explains that they “completely misrepresented me.  My views were distorted by the context in which they placed them. If they had told me even the title of the program, I would have absolutely refused to be on it.” [6]

July, 2003

Co-published a paper titled “Celestial driver of Phanerozoic climate?” (PDF) in the journal GSA Today (a publication of the Geological Society of America).

The paper was accompanied by a press release entitled “Global Warming not a Man-made Phenomenon,” where Shaviv was quoted as stating, “The operative significance of our research is that a significant reduction of the release of greenhouse gases will not significantly lower the global temperature, since only about a third of the warming over the past century should be attributed to man.” [7]

The claims were disputed in an article in Eos, by an international team of scientists and geologists.

According to RealClimate, the scientists found that Shaviv and Veizer’s analysis was “based on unreliable and poorly replicated estimates, selective adjustments of the data (shifting the data, in one case by 40 million years) and drew untenable conclusions, particularly with regard to the influence of anthropogenic greenhouse gas concentrations on recent warming.” [8]


*Although Nir Shaviv has been listed as a “Senior Advisor” to CFACT by some documents (PDF, p. 70), he responded to a query by SourceWatch by saying that “This is the first time I hear of this group.”


Skeptical Science does not list any peer-reviewed articles written by Nir Shaviv. [11]

Sample publications include:

  • “Celestial Driver of Phanerozoic Climate?” (PDF) GSA Today. VOL. 13, JULY 2003.
  • “On climate response to changes in the cosmic ray flux and radiative budget” (PDF). Journal of Geophysical Research VOL. 110, August 2005.


  1. Nir J. Shaviv Curriculum Vitae, August 2005,” The Racah Institute of Physics. Accessed February, 2012. Archived with WebCite February 2, 2012.

  2. Nir Shaviv. “Carbon Dioxide or Solar Forcing?ScienceBits, April 17, 2006. Archived with WebCite, February 2, 2012.

  3. Esti Ahronovitz. “Who's afraid of global warming,”, February 14, 2009. Archived February 13, 2010.

  4. New Solar-Climate Link and Implications for Our Understanding of Climate Change.” Speech at the Heartland Institute's 2009 International Conference on Climate Change.

  5. Proceedings,” The 2009 International Conference on Climate Change. Archived March 11, 2009.

  6. PURE PROPAGANDA - THE GREAT GLOBAL WARMING SWINDLE,” Media Lens, March 13, 2007. Archived January 18, 2010.

  7. (Press Release) Global warming not man-made phenomenon,” EurekAltert!, August 12, 2003. Archived with WebCite February 2, 2012.

  8. Michael Mann and Gavin Schmidt. “Peer Review: A Necessary But Not Sufficient Condition,RealClimate, January 20, 2005.

  9. Heartland Experts: Nir Shaviv,” The Heartland Institute. Accessed February 2, 2012.

  10. United Nations Framework Convention on Climate Change” (PDF, P. 70), United Nations Framework Convention on Climate Change, May 31, 2010.

  11. Peer-reviewed skeptic papers by Nir Shaviv,” Skeptical Science. Accessed February 2, 2012.

  12. “8th International Conference on Climate Change (ICCC-8): V International Conference on Climate and Energy (ICCE-5). Hotel Bayerischer Hof, Munich, November 30 – December 1, 2012” (PDF) retrieved from on November 24, 2012.

  13. Nir Shaviv,” Wikipedia entry.

  14. Nir Shaviv,” SourceWatch Profile.