Category Archives: Data and observations

Sea level rise acceleration (or not): Part IV – Satellite era record

by Judith Curry

Part IV of the Climate Etc. series on sea level rise focuses on the satellite era (since 1993), including the recent causes of sea level variations and arguments regarding the acceleration (or not) of recent sea level rise.

Continue reading

Sea level rise acceleration (or not): Part III – 19th & 20th century observations

By Judith Curry

We are in the uncomfortable position of extrapolating into the next century without understanding the last.” – Walter Munk 

Continue reading

Nature Unbound IV – The 2400 Bray cycle. Part C

by Javier

A possible mechanism for the effect of solar variability on climate, whereby solar variability acts over the stratospheric pressure system transmitting the changes top-down, and over ocean temperatures bottom-up.

Continue reading

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.

Continue reading

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.

Continue reading

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.

Continue reading

Nature Unbound III: Holocene climate variability (Part A)

by Javier

First in a two part series on Holocene climate variability.

Continue reading