Monthly Archives: July 2017

Update on the strength of aerosol forcing

Posted on July 29, 2017 by curryja | 298 comments

by Frank Bosse

Increasing evidence of small aerosol forcing supports the importance of internal variability in explaining inter hemispheric differences in temperature variability.

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298 Comments

Posted in Sensitivity & feedbacks

Stealth advocacy: a survey of weathercasters’ views on climate change

Posted on July 19, 2017 by curryja | 346 comments

by Mike Smith

For a decade, the weathercaster and broadcast meteorology communities have been subject of a focused campaign to force them to cover global warming in a manner acceptable to the American Meteorological Society, the American Geophysical Union and other advocacy groups.

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346 Comments

Posted in Sociology of science

Nature Unbound IV – The 2400-year Bray cycle. Part B

Posted on July 16, 2017 by curryja | 207 comments

by Javier

In Part A, we established the existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray. This climate cycle correlates in period and phase with a ~ 2400-year cycle in the production of cosmogenic isotopes, that corresponds with clusters of solar grand minima at times of abrupt cooling and climate deterioration. The relationship between solar activity and cosmogenic isotope production during the past centuries confirms the ~ 2400-year solar cycle as the origin of the climate cycle.

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207 Comments

Posted in Data and observations

Alarm about alarmism

Posted on July 15, 2017 by curryja | 222 comments

by Judith Curry

The climate change debate has entered what we might call the “Campfire Phase”, in which the goal is to tell the scariest story. – Oren Cass (twitter)

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222 Comments

Posted in Communication, Sociology of science

Nature Unbound IV – The 2400-year Bray cycle. Part A

Posted on July 11, 2017 by curryja | 136 comments

By Javier

The existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray, is supported by abundant evidence from vegetation changes, glacier re-advances, atmospheric changes reflected in alterations in wind patterns, oceanic temperature and salinity changes, drift ice abundance, and changes in precipitation and temperature. This is established with proxy records from many parts of the world.

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136 Comments

Posted in Attribution, Data and observations

Framing the challenge for the climate red team

Posted on July 9, 2017 by curryja | 298 comments

by Judith Curry

There is an opportunity to steer the proposed red team exercise in a useful direction. The first step is to frame the problem to be addressed.

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298 Comments

Posted in Policy, Sociology of science

Does a new paper really reconcile instrumental and model-based climate sensitivity estimates?

Posted on July 8, 2017 by curryja | 122 comments

by Nic Lewis

A new paper in Science Advances by Cristian Proistosescu and Peter Huybers (hereafter PH17) claims that accounting for the decline in feedback strength over time that occurs in most CMIP5 coupled global climate models (GCMs), brings observationally-based climate sensitivity estimates from historical records into line with model-derived estimates.

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122 Comments

Posted in Sensitivity & feedbacks

The Uncertainty Monster: Lessons From Non-Orthodox Economics

Posted on July 5, 2017 by curryja | 137 comments

by Vincent Randall

A perspective on economists’ grappling with the ‘uncertainty monster.’

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137 Comments

Posted in Economics, Uncertainty

What is red teaming?

Posted on July 3, 2017 by curryja | 330 comments

by Judith Curry

Last week, Scott Pruitt, EPA Administrator, stated he intended to form a ‘red team’ to debate climate science. What exactly is ‘red teaming’, and how can this be implemented in a way that is useful for climate science and for policy makers?

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330 Comments

Posted in Policy, Sociology of science