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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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2015 SkS Weekly Digest #12

Posted on 22 March 2015 by John Hartz

SkS Highlights

John Mason's The cause of the greatest mass-extinctions of all? Pollution (Part 1 and Part 2) generated a lively discussion among readers and attracted the most comments of the articles posted on SkS during the past week. 

El Niño Watch

NOAA's Climate Prediction Center is saying that there is an approximately 50-60% chance that El Niño conditions will continue through Northern Hemisphere summer 2015. This outlook was issued before the recent record-strength MJO and counter-rotating Pacific tropical cyclones emerged, so it will interesting to see how their outlook changes in the next update on April 9.

Strongest MJO Event on Record Boosts El Niño Odds by Dr. Jeff Masters, Wunderblog, Weather Underground, Mar 18, 2015


We’re about to experience a “double El Niño” — a rare weather phenomenon that climatologists had warned about several months ago

That means two consecutive years of the concentration of warm water in the Pacific Ocean that brings West Coast storms, quiet hurricane seasons in the Atlantic and busy ones in the Pacific. The danger is that this could mean more than a few months of odd weather, but instead usher in a new phase of climate change. Last year was the warmest year on record; 2015 looks set to be even warmer.

Welcome to the 'Double El Niño' — and more extreme weather by Jared Goyette, Living on Earth, Public Radio International (PRI), Mar 22, 2015

Toon of the Week

2015 Toon 12 

Hat tip to I Heart Climate Scientists

Quote of the Week

“One way of thinking about global warming from the human influences is that it's not just a gradual increase, but perhaps it's more like a staircase, and we're about to go up an extra step to a new level,” says climate scientist Kevin Trenberth of the National Center for Atmospheric Research.

Welcome to the 'Double El Niño' — and more extreme weather by Jared Goyette, Living on Earth, Public Radio International (PRI), Mar 22, 2015 

SkS in the News

In his Bad Astronomy/Slate post, Ted Cruz goes full Orwell, Phil Plait links to three SkS rebuttal articles:

In Climate science realities published in the Standard Examiner, Daniel Bedford states:

The 97 percent consensus. At least four independent peer-reviewed studies, using different methods, have found that around 95-97 percent of climate scientists or their peer-reviewed work agree that global warming is real, caused by humans, and potentially a serious threat. The most recent of these was by a multi-author team led by my friend and occasional research partner John Cook, and more than any of the others it’s attracted the ire of those dismissive of the seriousness of climate change, I suspect because of John’s ability to communicate his findings clearly and effectively to the public. Against these four peer-reviewed studies, all independently finding an overwhelming scientific consensus on climate change, Mr. Dickson prefers an opinion column from ForbesOnline.

The SkS rebuttal article, What is the link between hurricanes and global warming? is referenced and linked to by Simon Leadbetter in Cyclone Pam: a sign of worse to come posted on Blue & Green Tomorrow.

In her letter-to-the-editor, Truth in climate change published in the Lincoln Journal Star, Becky Seth writes:

The second speaker was Marlo Lewis, whose Ph.D. is in Government. Despite his lack of training in climate science, he showed many charts chosen to illustrate that the scientific consensus about human-caused climate change is wrong. In a survey of the authors of 12,000 peer-reviewed climate science articles published in journals of the profession between 1991 and 2011, with subsequent follow-up to confirm their views, it was found that 97 percent agreed that climate change is occurring and is caused by human activity. Many of the things Lewis asserted are addressed factually and thoughtfully at the website, Skeptical Science.

Coming Soon on SkS

  • New measurements confirm extra heating from our carbon dioxide (MarkR)
  • Shell: internal carbon pricing and the limits of unilateral action on climate (Andy Skuce)
  • 2015 SkS Weekly News Roundup #13A by John Hartz
  • Canadian scientists draw a roadmap to a low-carbon future (Dana)
  • The UK winter of 2014-15: another Tabloid FAIL (John Mason)
  • Guest post by John Abraham
  • 2015 SkS Weekly News Roundup #13B by John Hartz
  • 2015 SkS Weekly Digest #13 by John Hartz 

Poster of the Week

 

SkS Week in Review 

97 Hours of Consensus: Matthew Collins

97 Hours: Matthew Collins

Matthew Collins' bio page

Quote derived with permission from author from:

"Further emissions of greenhouse gases will cause further global warming. The Arctic will warm most rapidly and the land will warm more than the ocean. There will be more hotter and fewer cold days. Mid-latitude areas that currently experience high rainfall will get more. Sea levels will continue to rise and snow and ice will melt back. If we follow the highest scenario of future greenhouse gases, the Arctic is expected to be ice-free before the middle of the 21st century. “Avoiding 2 degrees of warming since preindustrial times will be very tough. We have already ‘spent’ more than two thirds of the CO2 emissions that we can afford to spend."

 

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Comments

Comments 1 to 4:

  1. A breaking story that SkS should probably get on top of:

    http://www.realclimate.org/index.php/archives/2015/03/whats-going-on-in-the-north-atlantic/#more-18156

    http://forum.arctic-sea-ice.net/index.php/topic,1199.0.html

    https://robertscribbler.wordpress.com/2015/03/23/world-ocean-heartbeat-fading-nasty-signs-north-atlantic-thermohaline-circulation-is-weakening/

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    Moderator Response:

    [JH] Rest assurred, the all-volunteer SkS author team is "on top" of this new research finding.

    PS - I have activated the links. Please learn how to do this using the edit tools provided. 

  2. One cannot have a cartoon like the one above and not refer to the excellent mocking of denialism that is the Hy Brazil scene from Erick the Viking.

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  3. There is a solution to the decrease in the snow pack that provides California with her water.  The Beaver.  The beaver does the same thing as a snow pack.  It shifts water from when it falls and is not needed (winter) to when it is not falling and is needed (summer).  Californians should wake up and get absolutely fanatic about having beavers in the catchments of all their streams.

    http://mtkass.blogspot.co.nz/2007/07/canadian-beaver-pest-or-benefactor.html

    http://mtkass.blogspot.co.nz/2011/05/erics-beavers.html

    http://mtkass.blogspot.co.nz/2014/06/the-tay-beavers-of-scotland.html

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  4. william...  Damns, whether man-made or erected by industrious little critters [redundant statement?], need water. We've had very little precipitation for several seasons now. More damns can't fix that.

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