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RealClimate In the News

24 Jul 2006 by group

The Guardian, Feb 25 2011, RealClimate faces libel suit

Salt Lake Tribune, Nov 27, 2010, Separating truth and fiction in climate debate (op-ed)

The Observer, Nov 14 2010, Climate Change Email Scandal

Vetenskapens Varld (Swedish Television), Nov 2010 Climategate – otextad

Providence Journal, 21 Jan 2010 Continued partly cloudy

Die Zeit, 8 Dec 2009 Skeptiker contra Alarmisten Klima Kampf im Netz

The Economist, 26 Nov 2009 Mail-strom

USA Today, 24 Nov 2009 Global warming cuts have a price

Der Speigel, 22 Nov 2009 Cyberkrieg unter Klimaforschern

New Yorker, 16 Nov 2009 Hosed

New York Times, 25 Oct 2009 Campaign Against Emissions Picks Number

New York Times, 23 Sep 2009 Momentum on Climate Pact Is Elusive

Z Magazine, Sep 2009 Toward Climate Justice

Sydney Morning Herald, 9 Jun 2009 How the carbon lobby blackens media coverage

Augusta Chronicle, 12 May 2009 Writer misunderstands global warming (letter to the editor)

GQ (UK), March 2009 Britain’s 100 Most Powerful Men

Fox News, 22 Jan 2009 Antarctica Getting Warmer After All

Boulder Weekly, 4 Dec 2008 Objectively wrong: How American journalism is forsaking truth for balance

USA Today, 1 Dec 2008 Stunning science books for holiday giving

Sydney Morning Herald, 8 Nov 2008 Truly inconvenient truths about climate change being ignored (see also letter in response)

Nature, 22 Oct 2008 Language: Disputed definitions

L.A. Times, 11 Oct 2008 Global Warming: The book

Columbia University “The Record”, 25 Aug 2008 Faculty Become Trusted Voice in Blogosphere.

Vancouver Courier (Canada), 22 Aug 2008 Global warming isn’t just hot air. (letter to editor)

New York Times, 29 Jul 2008 Climate Experts Tussle Over Details. Public Gets Whiplash.

Chester Daily (PA), 29 Jul 2008 Climate Experts Tussle Over Details. Public Gets Whiplash.

Crikey (Australia), 17 Jul 2008 Comments, corrections, clarifications, and c*ckups

The Bellevue Reporter (WA), 9 Jul 2008 Climate change truth and consequences (letter to editor)

The News and Observer (NC), 9 Jun 2008 The peril to come (letter to editor)

Der Spiegel (online), 14 May 2008 Forscher wetten 5000 Euro gegen pausierende Erderwärmung

Cumberland Times-News, 13 May 2008 Burning of coal and oil surely warming planet (letter to editor)

Le Monde, 12 May 2008 Des chercheurs parient 5 000 euros sur une pause dans le réchauffement

Globe and Mail, 9 May 2008 Global cooling theories put scientists on guard

Wired News, 8 May 2008 Climate Scientists Put Their Money Where Their Models Are

Victorville Daily Press (CA), Apr 28 2008 Letter: Global warming criticism was never peer-reviewed (letter to editor)

Time Magazine: Apr 28 2008 Top 15 Environmental Websites

Chico Enterprise-Record (CA), 30 Mar 2008 Letter: Spin doctors debunk global warming (letter to editor)

Der Speigel, 5 Mar 2008 BIZARRER KONGRESS: Konferenz der Klimawandel-Leugner

The Nation, 25 Feb 2008 Skeptic Zombie Killed…Again

Le Monde (FR), 15 Jan 2008 Querelle scientifique autour du climat (and here)

New Statesman, 14 Jan 2008 Has global warming really stopped?

Science, 11 Jan 2008 Daggers Are Drawn Over Revived Cosmic Ray-Climate Link (subr.)

Bay Area Indymedia, 8 Jan 2008 The Antarctic Ice Sheet Is Growing?

The Guardian (UK), 5 Jan 2008 50 people who could save the planet

The Times (UK), 20 Dec 2007 We must acknowledge global warming, and act (letter)

20 Minutes (Fr), 20 Dec 2007 Les sceptiques français du climat accusés de tricherie

Le Monde (Fr), 19 Dec 2007 Une étude “climato-sceptique” soulève des soupçons de fraude

Libération (Fr), 19 Dec 2007 Le coup de colère du climatologue

The Independent (UK), 9 Dec 2007 My Week in Media: Chris Huhne

Salon.com, 19 Nov 2007 America’s water war

Science News, 17 Nov 2007 Science Safari: Climate of Debate

MSNBC, 16 Nov 2007 Al Gore for Science Czar?

Middle East Online, 16 Nov 2007 How Dry We Are (and several other online sources)

ScienceNOW Daily News, 9 Nov 2007 Giving Climate Change a Kick

Ely Times (Nevada), 7 Nov 2007 Ely focal point of global warming debate

Edmonton Journal, 28 Oct 2007 Self-serving’ Gore film useful, astronaut says

Westminster Community Times (MD), 24 Oct 2007 Wacky weather a sign of what?

BBC News (online), 15 Oct 2007 Northwest Passage: Your questions answered

Christian Science Monitor, 14 Oct 2007 Global-warming skeptics: Is it only the news media who need to chill?

Wichita Eagle (Kansas), 24 Aug 2007 Why do some deny global warming? (editorial)

Chico Enterprise-Record (California), 18 Aug 2007 Propaganda confuses issue

The Guardian, 16 Aug 2007 Blogger gets all hot and bothered over NASA’s climate data error

The Daily Telegraph, 16 Aug 2007 Nasa climate change error spotted by blogger

Newsweek, 8 Aug 2007 Resisting Change: Global Warming Deniers: Live Talk

Geotimes, August 2007 Down to Earth with science bloggers Gavin Schmidt and Michael Mann

Canberra Times (Australia), 13 Jul 2007 Old tricks still dog warming debate

National Geographic News, 12 Jul 2007 Sun Not a Global Warming Culprit, Study Says

Daily Telegraph (Australia), 6 Jul 2007 A Live Earth starts with you

The Observer (UK), 24 Jun 2007 The melting ice man cometh

Barossa News (Australia), 12 Jun 2007 climate comment (letter to editor)

The Nation, 11 Jun 2007 The Greenhousers Strike Back and Strike Out

The Barre Montpelier Times Argus (Vermont), 10 Jun 2007 Sanders is wrong: Cause of warming unknown (also Rutland Herald)

High Country News, 24 May 2007 Why are there still climate-change deniers?

Milwaukee Journal Sentinel (online), 24 May 2007 Global Warming and Wisconsin

New York Times (magazine), 20 May 2007 Al Gore Has Big Plans (also International Herald Tribune, Tuscaloosa News and Hendersonville Times News )

Santa Barbara Independent, 17 May 2007 Six books that will boost your climate change awareness

New York Resident, 15 May 2007 Worried About Environmental Doom? Go See An Eco-therapist

Athens News (Ohio), 14 May 2007 Area coal operator throws cold water on climate-change threat

This Week in Science, 8 May 2007 podcast

Salon.com, 4 May 2007, Alexander Cockburn’s climate change adventure

The Record (Ontario CA), 3 May 2007 Program had errors (letter to editor)

The New Republic (online), 2 May 2007 The Plank: What’s Your Excuse?

Vanity Fair (online), May 2007 The 2007 Green Issue: Online Resources

Seattle Times, 29 Apr 2007 UW conference will address the ethics of climate change

This Week in Science, 24 April 2007 podcast

PBS Frontline (online), April 2007 The Doubters of Global Warming

The State Journal (West Virginia), 12 Apr 2007 British Program Offers Another View of Global Warming

Daily Texan, 10 Apr 2007 Ignoring warning signs as world warms

Alaska Report, 9 Apr 2007 Climate change skeptics roll on

Philadelphia Inquirer, 9 Apr 2007 Eco-anxiety: Something else to worry about

The Guardian (UK), 7 Apr 2007 Hot rods of the apocalypse

MSNBC, 5 Apr 2007 Cosmic Log

Plenty Magazine (NY), April 2007 Global Warming Guru

Times Argus (Vermont), 25 Mar 2007 Global warming hits a raw nerve for some (see also Rutland Herald)

Huffington Post, 23 Mar 2007 On Hurricanes and Much Else, Gore Did Better Than his Congressional Critics

New Scientist, 22 Mar 2007 Al Gore rallies US Congress over climate

Frankfurter Allgemaine, 22 Mar 2007 Globale Erwärmung. Ist der Klimawandel nicht als Schwindel?

Alaska Report, 22 Mar 2007 More from ‘Inconvenient Gore’

New York Times (letters), 20 Mar 2007 Al Gore and the Climate Debate

New Scientist (online), 19 Mar 2007 Climate Change: Who is swindling who?

New York Review of Books, 15 Mar 2007 Warning on Warming

The Guardian (UK), 14 Mar 2007 The swindle of the climate change swindle?

Huffington Post, 13 Mar 2007 Debunking the NYT’s Sloppy Hit Piece on Gore

Salon.com, 13 Mar 2007, New York Times and Al Gore’s Science

The Guardian (UK), 13 Mar 2007 Don’t let truth stand in the way of a red-hot debunking of climate change

Daily Telegram (Michigan), 11 Mar 2007 Rally to slow Global Warming

Courier News (New Jersey), 9 Mar 2007, Free screening of ‘An Inconvenient Truth’

Daily Breeze, 26 Feb 2007 Somebody want to introduce Ernie the Attorney and Crazy Gene?

Herald Journal (Utah), 24 Feb 2007, Climate data misunderstood (letter to editor)

La Presse, 20 Feb 2007, Des «éco-sceptiques» à l’assaut du Web

Napa Valley Register, 19 Feb 2007, A lot of hot air? (letter to editor)

The Street, 10 Feb 2007, Weekend Linkfest

Salon.com, 7 Feb 2007, How the World Works: Climate change, the North Pole, and an imaginary Chinese navy

Seattle Post-Intelligencer, 2 Feb 2007 Climate Change Questions Answered

Wallowa County Chieftan, 11 Jan 2007 A change in the weather: Cold facts and second looks

NPR (“All Things Considered”), 10 Jan 2007 Is Warm January a Sign of Good Luck, or Bad Times?

NBC Channel 10 (Philadelphia), 9 Jan 2007 Hurricane Blog: A Great Climate Website

Air America Radio, 8 Jan 2007 Interview with Dr. Joseph Romm

‘Foriegn Policy’, Jan/Feb 2007 Expert Sitings

Vancouver Sun, 31 Dec 2006 Climate issues divide colleagues at UBC (also Victoria Times Colonist)

MSNBC, 29 Dec 2006 Big Science for 2007

East Oregonian, 28 Dec 2006 Man-caused emissions just tiny bit of stratosphere

Guardian, 21 Dec 2006 The new 100 most useful sites

Antarctic Sun, 3 Dec 2006 Closed Case

Fast Company, Dec 2006/Jan 2007 An Inconvenient Business

World Changing, 30 Nov 2006 Overstating the obvious?

Wall Street Journal, 27 Nov 2006 Blog Watch: Weather And Legal Scholarship (subscription required)

World Changing, 27 Nov 2006 GeoEngineering in the Anthropocene Era

The Guardian, 14 Nov 2006, This is a dazzling debunking of climate change science. It is also wildly wrong

Sunday Telegraph, 12 Nov 2006, Wrong problem, wrong solution

CNN , 24 Oct 2006, Google launches personalized search engine (see also BBC, Washington Post, San Francisco Chronicle, and Los Angeles Times).

Online Opinion (Australia), 4 Oct 2006, The consequences are upon us

Salon.com, 13 Sep 2006, How the World Works: State of Imbecility

Chronicle of Higher Education, 8 Sept. 2006, Climate Science on Trial

Salon.com, 31 Aug 2006, How the World Works: Peer-review’s Myspace problem

Seed Magazine, August 2006, The Contrarian

The Independent (UK), 24 Aug 2006, Katrina and the waves: the row over hurricanes

Charlotte Observer, 15 Aug 2006, Looking for facts in all the wrong places

Discovery Channel (on-line), 1 Aug 2006, July 2006: Hottest on Record?

Associated Press (syndicated), 28 Jul 2006,Utilities Paying Global Warming Skeptic

Der Spiegel, 22 Jul 2006, Did Al Get the Science Right?

Nature, 12 July 2006, Should we flood the air with sulphur?

Contra Costa Times, 12 July 2006, What to do about it (letter to editor)

Ventura County Star, 9 July 2006, Don’t Chill Out on Reporting All Facts (letter to editor)

Nature, 6 July 2006, Top five science blogs

Westworld, 29 June 2006, The Sceptic

Huffington Post (blog), 29 June 2006, The Poker Player’s Guide to Climate Change

New York Times, 22 June 2006, Science Panel Backs Study on Warming Climate

The New Republic, 21 June 2006, Hot Topic

Monterey County Weekly, 15 June 2006, Global Power: Al Gore speaks with Bob Edwards about politics and the end of the world”

Salon.com, 10 June 2006, Did Al get the science right?

Agence Sciencepress, 2 Jun 2006, La science derriere Al Gore

New York Times, 29 May 2006, Swift Boating the Planet”

Washington Post Magazine, 28 May 2006 The Tempest

Nature, 23 May 2006 Al Gore: Eco matinee idol?

New York Times, 22 May 2006: ‘An Inconvenient Truth’: Al Gore’s Fight Against Global Warming

Chicago Maroon, 9 May 2006: Gore urges us to accept An Inconvenient Truth

Salon.com, 1 May 2006: How the World Works

Grist Magazine, 19 Apr 2006: Apocalypse 101: A climate-change compendium

New York Times, 18 Apr 2006: The Big Burp Theory of the Apocalypse (op-ed by Nicholas Kristof)

Boston Globe, 9 Apr 2006: In the Balance: Is balanced journalism to blame for the lack of action on global warming?

Bio-IT World, 6 Apr 2006: Web 2.0: Scientists Need to Mash It Up

Alberquerque Journal, 2 Apr, 2006: Science, Politics and Press Releases

New York Times, 2 Apr 2006: Mulling the World From a Bench on Broadway

Nature, Mar 29 2006: Climate Science: The son also rises

Agence Sciencepress, 27 Mar 2006, En manchette: Vous êtes inondé

Globe and Mail (Canada), Mar 18 2006: Baby, its Warm Outside

Z Magazine, Feb 2006: Climate Talks in Montreal

Der Spiegel, Jan 20 2006: Spiegal Surfs the Web: Blogging Climate Change

Daily Kos (blog), Jan 20 2006: Science Friday: RealClimate

USA Today (online), Jan 2006: The Weather Guys (see “worth reading” sidebar)

Grist Magazine, Dec 29, 2005: RealClimate one year in

Agence Sciencepress, 26 Dec 2005, En manchette: La science et vous en 2005

Agence Sciencepress, 23 Dec 2005, Blogue et science: un retour vers la vraie nature d’Internet

Grist Magazine, Dec 20, 2005: Skepticism, real and faux

MSNBC, Dec 8 2005: Science ran headlong into society in 2005

Seed Magazine, Dec 2005, Gavin Schmidt: Climate modeller/Blogger of record (not available online)

Nature, 438, 548-549 1 Dec 2005: Science in the web age: Joint efforts

Agence Sciencepress, 25 Nov 2005, Dossier : Le blogue

Sueddeutsche Zeitung (Germany), 7 Nov 2005: Stärker, öfter, weiter

Insurance NewsNet, 1 Nov 2005: Are more Katrinas on the Horizon?

New Jersey Herald, 24 Oct 2005: Is Hurricane Intensity and Frequency Linked to Global Warming?

San Luis Obispo Tribune, 21 Oct 2005: Scientists seek to set the record straight on global warming (see also Charlotte Observer and Bradenton Herald)

MSNBC, 20 Oct 2005: Cosmic Log

Seattle Times, 9 Oct 2005: The truth about global warming and Is warming making hurricanes more ferocious? (see also Austin American -Statesman TX (10/30/05))

Chronicle of Higher Education, 4 Oct 2005: The Blogosphere as a Carnival of Ideas

Scientific American, 3 Oct 2005: Science and Technology Web Awards 2005

Agence Sciencepress, 3 Oct 2005, Michael Crichton au Senat

Planning Magazine: August/September 2005 Heat Wave

The Nation, 29 Sep 2005 (online version of Oct. 17 2005 issue): Global Storm Warning

Heise online (Germany), 28 Sep 2005: Was Katrina und Rita uns gelehrt haben

USA Today, 26 Sep 2005: Our denial is at Category 5 (op-ed)

EarthVision, 19 Sep 2005: Is there a link between global warming and hurricane Katrina?

The Ledger (Lakeland, Florida), 17 Sep 2005: Global Warming: Hurricanes Strengthen

The News and Observer (Rayleigh/Durham, North Carolina), 17 Sep 2005: Storms’ severity on the rise

U.Mass magazine, 16 Sep 2005: Never mind the weather?

The New Yorker, 12 Sep 2005: Storm Warnings

New York Times, 11 Sep 2005, Op-ed by Nicholas Kristoff: The Storm Next Time
(see also article in the International Herald Tribune)

WHYY (Philadelphlia, PA), 7 Sep 2005: ‘Radio Times with Marty Moss-Coane’

MSNBC, 2 Sep 2005: Cosmic Log

Lincoln Journal Star, 27 Aug 2005: Global Warming is Real (letter to editor)

Williamette Week, 24 Aug 2005: Hot or Not (see hyperlink in article)

Washington Post, 22 Jul 2005: A Bid to Chill Thinking

Wall Street Journal, 18 Jul 2005: Researchers, Lawmakers Criticize Probe Into Climate Calculations (by subscription only; see hyperlink in article)

New York Times, 18 Jul 2005: Two G.O.P. Lawmakers Spar Over Climate Study (see “related”)

USA Today, 18 Jul 2005: Global Warming Roils Congress (see “related items”)

Chronicle of Higher Education, 15 Jul 2005: Demand for Their Data on Climate Chills Scientists

US News & World Report, 14 Jul 2005: Fighting over a hockey stick

Chronicle of Higher Education, 1 Jul 2005: Congressman Demands Complete Records on Climate Research by 3 Scientists Who Support Theory of Global Warming

American Prospect (online), 27 June 2005: Debunking the Debunkers (see hyperlink in article)

Washington Monthly, 26 June 2005: The Feverish Wall Street Journal

Useless Knowledge, 20 June 2005: More About Global Warming Versus The Next Ice Age

Radio Singapore, 20 June 2005: Doomsday Reports on Climate Change – Reliable?

The Daily Telegraph (UK), 9 June 2005: “Footnote Frenzy”

Nature 435 26 May 2005: “Scientists need back-up by climate organizations”

American Scientist, 9 May 2005: RealClimate named “Site of the Week”

American Scientist, 2 May 2005: Science in the News (weekly Newsletter)

North Adams Transcript, 30 April 2005: Megabits and Pieces

Technology Review, 27 April 2005: Greenhouse Gas

NPR “Science Friday”, 22 April 2005: Climate Change Update

Mother Jones, 17 April 2005: The Man Behind the Hockey Stick

Washington Times, 4 April 2005: Climate: Hockey sticks and hobby horses

Washington Times, 21 March 2005: Climate: A hard look at the long term

Le Monde (France): 19 March 2005: La pollution et l’inertie du climat rendent ses changements inéluctables

New Scientist: 19 March 2005: Bad climate (letter to editor)

Australian Broadcasting Corporation: 7 March 2005: Journalist puts global warming sceptics under the spotlight

Scientific American, March 2005: The Man Behind the Hockey Stick

Washington Times, 28 February 2005: Open Season on Hockeysticks

BBC Radio (“Today Programme”), 24 February 2005: A climate scientist Professor Michael Mann suggests global warming is caused by mankind

Nature 433, p. 800 (Feb 24, 2005): Climate blog could score with newer hockey stick

Le Monde (France), 16 February 2005 : Kyoto, An 1 (pdf file)

Wall Street Journal, 14 February 2005: In Climate Debate, The ‘Hockey Stick’ Leads to a Face-Off

Le Devoir (Québec) : 12-13 February 2005 : Un blogue chaud

La Libre Belgique, 12 February 2005: Blog climatique

Toronto Star, 12 February 2005: Scientific Din Distorting Kyoto Message

La Recherche, 5 February 2005: Combattre les idées fausses sur le climat (subscription required).

Grist Magazine, 1 Feb 2005: Distort Reform

Yahoo News, 1 Feb 2005: Crichton best-seller stokes fire over global warming
(see also this related article in Japan Today 2/1/05)

Physics Today, Feb 2005, p 28: Web watch (subscription required)

Knight Ridder Newspapers (syndicated), 27 January 2005: Global warming novel a hit with politicians, but not scientists

Concord Monitor, 27 January 2005: Missed Point (letter to editor)

Cyber-Presse, 24 January 2005: Bloguer sur le climat

MSNBC, 24 January 2005: Reports put Different Spins on Global Warming

High Country News, 24 January 2005: Written in the Rings

American Prospect (online), 10 January 2005: Warmed Over (see hyperlinks in article)

Washington Monthly, 10 January 2005: New Blog Recommendations

Los Angeles Times, 9 January 2005: Being Set Free From Fear of the Future

Pittsburgh Post-Gazette, 2 January 2005: Fiction not Fact (letter to editor)

Le Monde (France), 1 January 2005: Sur RealClimate.org, des spécialistes traquent impostures et erreurs scientifiques

Libération (France), 29 December 2004: Ras le blog des contre-vérités

MSNBC, 28 December 2004: The Web in waves’ wake

Contra Costa Times, 26 December 2004: Climate: Climatologist Can’t Warm to Crichton Novel

Science, 306,(24 December 2004); p2167 WEB LOGS: Sifting for Truth About Global Warming

Washington Times, 21 December 2004: Climate: Consensus in any language
(see also this related post by SpaceDaily 12/20/04)

Nature, 432, (23 December 2004); p933 Welcome climate bloggers, p937 Climatologists get real over global warming

New York Newsday, Sunday 19 December 2004: The Book on Global Warming

Initial Press Release, Friday 10 December, 2004: Top Scientists Launch RealClimate.org

Filed Under: In the News

The missing piece at the Wegman hearing

19 Jul 2006 by group

It’s not often that blogs come up in congressional hearings, but RealClimate was mentioned yesterday in the Energy and Commerce hearings on the ‘Hockey Stick’ affair. Of course, it was only to accuse us of being part of tight-knit social network of climate scientists, but still, the public recognition is nice.

There is much that could be said about the hearings (and no doubt will be) and many of the participants (Tom Karl, Tom Crowley, Hans von Storch, Gerry North) did a good job in articulating the big picture on climate change independently of the ‘hockey stick’ study as we’ve highlighted before. But it seems to us that there was a missing element in the discussions. That element was the direct implication of the critique that was the principal focus of Wegman’s testimony and that was mentioned periodically throughout the day. [Read more…] about The missing piece at the Wegman hearing

Filed Under: Climate Science, Paleoclimate

It’s different in Europe

18 Jul 2006 by group

Paul Thacker has an interesting interview with a European and a US journalist on the media coverage of climate science in Europe. The standard contrarian line does not get as much attention there as it does in the US (which is good), but whether that means that the journalism there is actually better is a tricky point. So what makes for good climate science journalism and do they do it better over there?

Filed Under: Climate Science, RC Forum, Reporting on climate

Introducing RC forum

18 Jul 2006 by group

It’s clear that there is a need to have some posts and discussions that specifically deal with up-to-the-minute articles and issues that we don’t necessarily want to cover in our usual detail. This might be related to a recent op-ed which just repeats the same talking-points as usual, or pointers to good discussions on other sites. To that end, we are introducing a separate category of post, called “RC forum”, where we will post these more minor items. Hopefully, this will help make interesting comment threads, which now sometimes occur under completely unrelated posts, easier to find and reference. The big pieces will still appear on the front page and in the RSS and Google feeds but the RC forum pieces will not. Right now, a notification email is sent out for every post, but we could restrict this to main page items if needed. There is now a link on the top bar to the RC Forum page and recent comments on Forum pieces will appear on the sidebar. Please let us know if you think this is a good idea or if you have ideas to improve it.

Filed Under: Climate Science, RC Forum

‘The Discovery of Global Warming’ update

14 Jul 2006 by group

If you haven’t already seen the American Institute of Physics website by Spencer Weart on the ‘The Discovery of Global Warming’, we heartily recommend it. It provides both a summary of science, and more importantly, a history of how an obscure speculation from over one hundred years ago has become the scientific consensus of today. It has recently been updated with many more references from 1873 to the present, and so is even more worth reading. Spencer is very keen on getting feedback on the project, so don’t hesitate to let him know what you think.

Filed Under: Climate Science

Ice Sheets and Sea Level Rise: Model Failure is the Key Issue

26 Jun 2006 by group

Guest post by Michael Oppenheimer, Princeton University

A plethora of research articles has appeared over the past year reporting new observations of the Greenland and West Antarctic ice sheets along with associated modeling results. RealClimate has reviewed the issues raised by these articles and attempted to clarify the sometimes conflicting inferences about the current mass balance of the ice sheets, as well as their future contributions to global mean sea level rise (see here and here).

Nevertheless, the issue still seems to perplex many journalists and others because there are two entirely distinct aspects of the sea level rise problem that are emphasized, depending on which scientists are speaking. On the one hand, these ices sheets are large enough to ultimately raise sea level by 7m and about 5m, for Greenland and West Antarctica, respectively. On the other, the recent observations that caused such a stir report a current contribution to the rate of sea level rise not exceeding ~1mm/yr from both ice sheets taken together. If this rate were maintained, the ice sheets would make a measurable but minor contribution to the global sea level rise from other sources, which has been 1-2mm/yr averaged over the past century and 3mm/yr for 1993-2003, and is projected to average 1-9mm/yr for the coming century (see IPCC Third Assessment Report).

The key question is whether the ice sheet contribution could accelerate substantially (e.g., by an order of magnitude) either in this century or subsequently. Sea levels were indeed much higher in the distant, warmer past but the timing of earlier sea level rise is very uncertain. From the point of view of societal and ecosystem adaptation, the timescale over which ice sheets might disintegrate, which may be on the order of centuries or millennia according to the two extremes posited in the literature, is crucial. [Read more…] about Ice Sheets and Sea Level Rise: Model Failure is the Key Issue

Filed Under: Arctic and Antarctic, Climate modelling, Climate Science

National Academies Synthesis Report

22 Jun 2006 by group

The long-awaited NAS synthesis report on surface temperature reconstructions over the last few millennia is being released today. It’s a long (155 page) report and will take a while to digest, but we applaud the committee for having tried to master a dense thicket of publications and materials on the subject over a relatively short time.

It is probably expecting too much for one report might to put to rest all the outstanding issues in a still-developing field. And given the considerable length of the report, we have little doubt that keen contrarians will be able to mine the report for skeptical-sounding sentences and cherry-pick the findings. However, it is the big picture conclusions that have the most relevance for the lay public and policymakers, and it is re-assuring (and unsurprising) to see that the panel has found reason to support the key mainstream findings of past research, including points that we have highlighted previously:
[Read more…] about National Academies Synthesis Report

Filed Under: Climate Science, Extras, Paleoclimate, Reviews

NOAA: Hurricane forecasts

9 Jun 2006 by group

Guest commentary from Thomas Crowley

NOAA has issued its annual forecast for the hurricane season, along with its now-standard explanation that there is a natural cycle of multidecadal (40-60 year) length in the North Atlantic circulation (often referred to as the “Atlantic Multidecadal Oscillation”–see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this oscillation. [Read more…] about NOAA: Hurricane forecasts

Filed Under: Climate Science, Hurricanes, Instrumental Record

On a Weakening of the Walker Circulation

1 Jun 2006 by group

by Ray Pierrehumbert and Rasmus Benestad

Second article of our 3-part series on atmospheric circulation and global warming

In Part I we outlined some general features of the tropical circulation, and discussed ways in which increases in anthropogenic greenhouse gases might affect El Niño. Now we take up the question of how global warming might affect the quasi-steady east-west overturning circulation known as the Walker Circulation. The Walker circulation affects convection and precipitation patterns, the easterly Trade Winds, oceanic upwelling and ocean biological productivity; hence, changes in this circulation can have far-reaching consequences. It also provides the background state against which El Niño events take place, and so changes in the Walker circulation should form an intrinsic part of thinking about how global warming will affect El Niño. In a paper that recently appeared in Nature, Vecchi, Soden, Wittenberg, Held, Leetmaa and Harrison present intriguing new results which suggest that there has already been a weakening of the Walker circulation in the past century, and that the observed changes are consistent with those expected as a response to increases in anthropogenic greenhouse gases. The discussion in Vecchi et al. also raises some very interesting issues regarding the way the hydrological cycle might change in a warming world.

[Read more…] about On a Weakening of the Walker Circulation

Filed Under: Climate modelling, Climate Science, El Nino, Instrumental Record, Oceans

How Red are my Proxies?

24 May 2006 by group

Guest commentary by David Ritson

Realclimate recently gave a detailed review of the issues surrounding the Von Storch et al. (2004) Science article that purported to show that the paleo-reconstructions of Mann et al. were invalid. Part of the review centered on a comment of Wahl, Amman and myself and the response to it by Von Storch et al that appeared on April 27 in Science. The response admitted that our critique of their original results was correct but then opened up a new area of debate. As in their original 2004 article von Storch et al had used a coupled climate model (AOGCM) to simulate the temperatures of the last two thousand years. They had then generated pseudo-proxies by adding noise at selected spatial locations to the AOGCM generated temperature histories. The added noise was purportedly designed to represent non-climatic effects such as disease or insect infestation. This simulated ‘noisy’ world then can be used as a test-bed for the reconstruction methodology. A given analysis procedure is validated if it successfully recovers the original AOGCM noise free results and could be rejected if it fails to recover the original results. Of course such testing only makes sense if the simulated test world has characteristics similar to the real-world. [Read more…] about How Red are my Proxies?

Filed Under: Climate Science, Paleoclimate

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