Category Archives: Data and observations

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 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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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 many parts of the world.

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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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Nature Unbound III: Holocene climate variability (Part A)

by Javier

First in a two part series on Holocene climate variability.

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Response to critiques: Climate scientists versus climate data

by Judith Curry

Not surprisingly, John Bates’ blog post and David Rose’s article in the Mail on Sunday have been receiving some substantial attention.

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Climate scientists versus climate data

by John Bates

A look behind the curtain at NOAA’s climate data center.

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A case study of the Northern Colorado Front Range temperature history

by Monte Naylor

A comparison of NOAA-computed temperature trends with the “raw” historical temperature data.

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