PDO, ENSO and sea level rise

Posted on September 13, 2013 by | 318 comments

by Judith Curry

Three new papers to discuss on the topic of natural internal variability and sea level rise.

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318 Comments

Posted in Uncategorized

A standard for policy-relevant science

Posted on September 12, 2013 by | 300 comments

by Judith Curry

In Nature, Ian Boyd calls for an auditing process to help policy-makers to navigate research bias.

300 Comments

Posted in Uncategorized

Responsible Conduct in the Global Research Enterprise

Posted on September 11, 2013 by | 264 comments

by Judith Curry

Researchers need to communicate the policy implications of their results clearly and comprehensively to policy makers and the public—including a clear assessment of the uncertainties associated with their results—while avoiding advocacy based on their authority as researchers.

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264 Comments

Posted in Ethics

Laframboise’s new book on the IPCC

Posted on September 9, 2013 by | 680 comments

by Judith Curry

Could we switch to the grownup channel, please? – Donna Laframboise.

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680 Comments

Posted in IPCC

Arctic sea ice minimum?

Posted on September 8, 2013 by | 594 comments

by Judith Curry

It looks like the Arctic sea ice is close to reaching its seasonal minimum, reflecting a substantial increase in sea ice relative to the record breaking minimum in 2012.

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594 Comments

Posted in Polar regions

Big green in denial

Posted on September 7, 2013 by | 308 comments

by Judith Curry

Naomi Klein explains how environmentalists may be more damaging to their cause than climate change deniers.

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308 Comments

Posted in Communication, Politics

True courage(?)

Posted on September 6, 2013 by | 271 comments

by Judith Curry

True courage is knowing when you’re wrong but refusing to admit it. – The Onion

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271 Comments

Posted in Consensus, Uncertainty

U.S. Republicans: critical thinking on climate change

Posted on September 5, 2013 by | 443 comments

by Judith Curry

The U.S. Senate Republicans on the Environment and Public Works Committee have issued a Minority Report entitled Critical Thinking on Climate Change.

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443 Comments

Posted in Politics

What is Scientific Mediation?

Posted on September 4, 2013 by | 449 comments

by Judith Curry

Making clear what the real scientific dispute is about.

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449 Comments

Posted in Scientific method, Sociology of science

Natural internal variability: sensitivity and attribution

Posted on September 3, 2013 by | 568 comments

by Judith Curry

There is growing evidence to support the hypothesis that the pause cause is tied to a change in tropical Pacific Ocean circulations.  What are the implications of this for climate sensitivity and attribution of warming in the latter part of the 20th century?

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568 Comments

Posted in Attribution

Professors, politics and public policy

Posted on September 2, 2013 by | 465 comments

by Judith Curry

On academic misconceptions of politics and the policy process.

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465 Comments

Posted in Policy

Climate of failure(?)

Posted on September 1, 2013 by | 413 comments

by Judith Curry

On the politics of global warming policy.

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413 Comments

Posted in Policy

Ice sheet collapse?

Posted on August 30, 2013 by | 243 comments

by Rud Istvan

One of the catastrophes associated with anthropogenic global warming (CAGW) is a rising sea.     Is the projected rise and rate unprecedented? Will it be catastrophic?                                   

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243 Comments

Posted in Climate change impacts, Data and observations

Pause politics

Posted on August 30, 2013 by | 250 comments

by Judith Curry

U.S. and European Union envoys are seeking more clarity from the United Nations on a slowdown in global warming that climate skeptics have cited as a reason not to “panic” about environmental changes, leaked documents show.

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250 Comments

Posted in Attribution, IPCC, Politics

Inadequate uncertainty analysis in climate change assessments

Posted on August 30, 2013 by | 95 comments

by Judith Curry

Use of state-of-the-art statistical methods could substantially improve the quantification of uncertainty in assessments of climate change.

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95 Comments

Posted in Uncertainty

What is internal variability?

Posted on August 29, 2013 by | 379 comments

by X Anonymous

According to the IPCC, “climate variability refers to variations in the mean state and other statistics (such as standard deviations, the occurrence of extremes, etc.) of the climate on all spatial and temporal scales beyond that of individual weather events. Variability may be due to natural internal processes within the climate system (internal variability), or to variations in natural or anthropogenic external forcing (external variability).”

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379 Comments

Posted in Attribution

Pause tied to equatorial Pacific surface cooling

Posted on August 28, 2013 by | 492 comments

by Judith Curry

Update:  New comment from Xie

My mind has been blown by a new paper just published in Nature.

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492 Comments

Posted in Attribution, climate models

Overestimated global warming over the past 20 years

Posted on August 28, 2013 by | 283 comments

by Judith Curry

Recent observed global warming is significantly less than that simulated by climate models. This difference might be explained by some combination of errors in external forcing, model response and internal climate variability.

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283 Comments

Posted in Attribution, climate models

I know I’m right (?)

Posted on August 26, 2013 by | 495 comments

by Judith Curry

A behavioral view of overconfidence.

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495 Comments

Posted in Uncertainty

Who is on which ‘side’ in the climate debate, anyways?

Posted on August 24, 2013 by | 1,148 comments

by Judith Curry

Well, if you judge ‘sides’ by what climate scientists have to say about the science, it is getting difficult to tell.

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1,148 Comments

Posted in Consensus, Skeptics

JC on NPR

Posted on August 22, 2013 by | 719 comments

I have an interview tonite on NPR’s All Things Considered.

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719 Comments

Posted in Communication, Policy, Politics, Uncertainty

Arctic sea ice and extreme weather

Posted on August 21, 2013 by | 172 comments

by Judith Curry

Is the dramatic decline of Arctic sea ice, spurred by manmade global warming, making the  weather where we live more extreme?  Several recent studies have made this claim.  But a new study finds little evidence to support the idea that the plummeting Arctic sea ice has meaningfully changed our weather patterns. 

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172 Comments

Posted in Polar regions

Scientists and motivated reasoning

Posted on August 20, 2013 by | 758 comments

by Judith Curry

Motivated reasoning affects scientists as it does other groups in society, although it is often pretended that scientists somehow escape this predicament.

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758 Comments

Posted in Ethics, Scientific method

Proactionary principle

Posted on August 19, 2013 by | 410 comments

by Judith Curry

Between no action and precaution.

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410 Comments

Posted in Ethics, Policy

Available evidence: surface temperatures

Posted on August 18, 2013 by | 412 comments

by Steven Mosher

Some updates from the Berkeley Earth Surface Temperature project.

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412 Comments

Posted in Data and observations