Climate Etc.

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

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

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 […]

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Alarm about alarmism

Alarm about alarmism

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

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

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 […]

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

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

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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What is red teaming?

What is red teaming?

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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National Climate Assessment and the Trump administration

National Climate Assessment and the Trump administration

The National Climate Assessment must be redirected or terminated by Patrick J. Michaels Periodic National Assessments of the effects of climate change on the U.S. are mandated by the 1990 Global Change Research Act. The next Assessment Report is scheduled to be published in late 2018.

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Nature Unbound III – Holocene climate variability (Part B)

Nature Unbound III – Holocene climate variability (Part B)

by Javier The Neoglacial has been a period of progressive cooling, increasing aridity, and advancing glaciers, culminating in the Little Ice Age. The main Holocene climatic cycle of ~ 2400 years delimits periods of more stable climatic conditions which were identified over a century ago. The stable periods are punctuated by abrupt changes.

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