Search Results for: nature unbound

Nature Unbound X – The next glaciation

by Javier Summary: The IPCC expresses virtual certainty that a glaciation is not possible for the next 50 Kyr if CO2levels remain above 300 ppm. It is the long interglacial hypothesis. Analysis of interglacials of the past 800 Kyr shows … Continue reading

Nature Unbound IX – 21st Century Climate Change

by Javier A conservative outlook on 21st century climate change

Nature Unbound VIII – Modern global warming

by Javier Summary: Modern Global Warming has been taking place for the past 300 years. It is the last of several multi-century warming periods that have happened during the Neoglacial cooling of the past 3000 years. Analysis of Holocene climate … Continue reading

Nature Unbound VII – Climate change mechanisms

by Javier Climate variations that alter the angular momentum of the atmosphere modify the speed of the Earth’s rotation, which affects the length of day (LOD). Alterations in LOD integrate different climate-affecting phenomena, and can anticipate turning points in climate.

Nature Unbound VI – Centennial to millennial solar cycles

by Javier Summary: Holocene climate has been affected in different periods by several centennial to millennial solar cycles. The ~ 1000-year Eddy solar cycle seems to have dominated Holocene climate variability between 11,500-4,000 years BP, and in the last two … Continue reading

Nature Unbound V – The elusive 1500-year Holocene cycle

by Javier The existence of a 1500-year climatic cycle during the Holocene, related to the glacial Dansgaard-Oeschger cycle, is a matter of intense debate. However, by introducing precise timing requirements it can be shown that the 1500-year cycle displayed in … 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.

Nature Unbound III: Holocene climate variability (Part A)

by Javier First in a two part series on Holocene climate variability.

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, … 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 … 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 … Continue reading

Nature Unbound II: The Dansgaard- Oeschger Cycle

by Javier Dansgaard-Oeschger (D-O) events are the most dramatic and frequent abrupt climate change events in the geological record. They are usually explained as the result of an Atlantic Ocean salinity oscillation paced by internal variability. Available evidence however supports … Continue reading

Nature Unbound I: The Glacial Cycle

by Javier Insights into the debate on whether the Holocene will be long or short.

Assessments, meta-analyses, discussion and peer review

by Judith Curry There is an unfortunate knowledge monopoly in climate science and policy – the IPCC and UNFCCC.  As a result there is insufficient intellectual and political diversity in assessments about climate change.  To break this monopoly, we need … Continue reading

What scientific ideas are ready for retirement?

by Judith Curry So, what scientific idea do YOU think is ready for retirement?